ABS-Regellogik mit Gelände-Modul

Es wird ein Verfahren zur Regelung des Bremsdruckes bei einem Fahrzeug mit Antiblockiersystem (ABS) in einem Gelände-Modus vorgeschlagen, wobei zur Verkürzung des Bremsweges unterhalb einer ersten vorgegebenen Fahrzeuggeschwindigkeit und oberhalb einer zweiten vorgegebenen Fahrzeuggeschwindigkeit kurzzeitige Blockierphasen der Vorderräder erzeugt werden. Mit der Umschaltung der Blockierschutz-Elektronik auf den Gelände-Modus werden gleichzeitig die Räder der Hinterachse zur Verbesserung der Fahrstabilität unterhalb der ersten vorgegebenen Fahrzeuggeschwindigkeit auf eine Select-Low-Regelung (SLR) oder auf eine modifizierte Achsregelung (MAR) umgeschaltet.

CONTROL OF WHEEL SLIP IN VEHICLES

PROCEDE DE REGULATION DU GLISSEMENT DES ROUES D'UN VEHICULE DONT TOUTES LES ROUES SONT MOTRICES.

Procédé permettant de réguler le glissement des roues au moyen d'un système de freinage antiblocage, destiné à des véhicules automobiles, notamment à des véhicules routiers dont toutes les roues sont motrices et qui sont équipés d'un différentiel de répartition à blocage commandé ou d'un dispositif de transmission embrayable du deuxième essieu du véhicule et d'un dispositif d'accouplement rigide entre le dispositif de transmission de l'essieu avant et celui de l'essieu arrière, caractérisé en ce que, lorsque le dispositif de blocage 34 du différentiel de répartition 29 est enclenché, c'est-à-dire lorsque le dispositif de transmission de l'essieu avant est accouplé de manière rigide à celui de l'essieu arrière, et après que le système de régulation du glissement a réagi, une nouvelle élévation de la pression de freinage dans les freins de roues arrière 9, 10 est empêchée pendant un laps de temps prédéterminé. Procédé conforme à la revendication 1, caractérisé en ce qu'une augmentation de ...

Wheel sliding detecting method for e.g. rear wheel drive motor vehicle, involves detecting reliable nature of absolute sliding of wheel of vehicle from estimated speed of vehicle, based on information about detected vehicle wheel sliding

The method involves calculating absolute sliding of a wheel with respect to an estimated longitudinal speed (V-ref) of a motor vehicle, and defining integration conditions of a derivative (dS-x) of sliding of the wheel. Non-reliable nature of the calculated wheel sliding is defined from estimation of a reference speed of the vehicle, and the wheel sliding of the vehicle is detected. Reliable nature of the absolute sliding of the wheel is detected from the estimated speed of the vehicle, based on information about the detected vehicle wheel sliding.

CONTROL DEVICE Of an ACTUATOR OF TRANSFER OF COUPLE HAS MULTIPLE OPERATING PROCESSES.

Système de commande d'un actionneur (5) de transfert de couple pour un véhicule automobile à quatre roues motrices, comprenant des moyens de détermination (1) et un système d'antiblocage des roues, caractérisé en ce qu'il comprend : un moyen de commande (2) d'antiblocage des roues et un moyen de commande (3) de l'actionneur de transfert de couple aptes à coopérer afin d'émettre la commande de transfert de couple à destination de l'actionneur (5) de transfert de couple. A control system for a torque transfer actuator (5) for a four-wheel drive motor vehicle, comprising determining means (1) and an anti-lock system for the wheels, characterized in that it comprises: means wheel anti-lock control device (2) and a torque transfer actuator control means (3) adapted to cooperate to transmit the torque transfer control to the transfer actuator (5) of couple.

Process for controlling travel state during braking in vehicle

A method of controlling the driving state of a vehicle in which an antilock brake control for eliminating a locking tendency of a wheel during braking can be carried out, and a four-wheel drive state and a two-wheel drive state can be switched from one to another. A monitored estimated vehicle speed is calculated on the basis of highest one of wheel speeds of the vehicle wheels and a value is detected by a longitudinal acceleration/deceleration sensor for detecting a longitudinal acceleration or deceleration of a vehicle speed, and a judgement speed is determined at a value lower than the monitored estimated vehicle speed. The vehicle speed is also independently determined based upon the speed of each of the vehicle wheels. The four-wheel drive state is switched to the two-wheel drive state in response to highest one of vehicle speeds independently calculated on the basis of the wheel speeds becoming equal to or less than the judgement speed in the four-wheel drive state. Thus, when the ...

CONTROL SYSTEM OF AN ACTUATOR TORQUE TRANSFER WITH MULTIPLE MODES OF OPERATION.

FOUR-WHEEL OFF-ROAD VEHICLE HAVING AN ANTI-LOCK BRAKING SYSTEM ASSEMBLY

An off-road vehicle has two front wheels and two rear wheels, the rear wheels being connected to a spool gear driven by a motor. The vehicle also has a left front brake, a right front brake and a single rear brake. Speeds of left and right front wheels are respectively monitored by left and right front speed sensors. A single sensor monitors a common speed of left and right rear wheels. Two user actuated braking input devices, for example a hand lever and a foot lever, may be used independently or concurrently to provide a braking command. An anti-lock braking system may use speed measurements from the various speed sensors to control selective application of pressure on the left front brake, the right front brake and the rear brake.

ABS control logic comprising an offroad module

A method for judging road surface conditions for judging road surface conditions on which a vehicle is running. The method includes the steps of: obtaining wheel speed rotational information of driving wheels of the vehicle during running from wheel speed detecting means, receiving GPS radio waves to calculate positional information or information on vehicle velocity, and judging road surface conditions during running on the basis of a relationship between the wheel speed rotational information and the positional information or information on vehicle velocity. Conditions of road surfaces on which a vehicle is running can be accurately judged.

Skid detection apparatus for vehicle

In an apparatus for detecting a skid occurred on a four-wheel drive vehicle having a prime mover and a transmission, an actual rear right/left wheel speed ratio between the rear right/left wheel speeds is calculated (S10) based on detected front and rear wheel rotational speeds, a front/rear wheel slip ratio during grip-driving is calculated by retrieving characteristics of a front/rear wheel slip ratio set with respect to a rear right/left wheel speed ratio using the calculated actual rear right/left wheel speed ratio, an actual front/rear wheel slip ratio is calculated (S14) based on the detected front wheel rotational speed and the rear wheel rotational speed, and occurrence of skid is then determined (S16) based on a difference between the calculated front/rear wheel slip ratio during grip-driving and the calculated actual front/rear wheel slip ratio.

PROCESS OF DETECTION OF RESUMPTION Of ADHERENCE Of a WHEEL OF MOTOR VEHICLE.

VEHICLE CONTROL APPARATUS AND CONTROL METHOD THEREOF

Disclosed are a vehicle control apparatus and a control method thereof. According to one embodiment of the present invention, the vehicle control apparatus includes: an input portion configured to receive a front wheel braking pressure value detected by a detection device and braking execution information of an anti-lock brake system (ABS); a determiner configured to determine whether a pressurizing mode is executed, from the input braking execution information of the ABS, and in case it is determined that the pressurizing mode is executed, determine whether the input front wheel braking pressure value is identical to a predetermined target front wheel braking pressure value; and a controller configured to control the ABS to quickly execute the pressuring mode by using a target front wheel pressuring amount that is set in accordance with the front wheel braking pressure value and using a target front wheel pressure time. Accordingly, the present invention is able to efficiently improve ...

СИСТЕМА УПРАВЛЕНИЯ ПРИВОДОМ ПЕРЕДАЧИ КРУТЯЩЕГО МОМЕНТА С НЕСКОЛЬКИМИ РЕЖИМАМИ РАБОТЫ

... 1. Система управления приводом (5) передачи крутящего момента для автотранспортного средства с четырьмя ведущими колесами, содержащая средства (1) определения и систему антиблокировки колес, отличающаяся тем, что содержит средство (2) управления антиблокировкой колес и средство (3) управления приводом передачи крутящего момента, выполненные с возможностью взаимодействия для подачи команды на передачу крутящего момента, предназначенной для привода (5) передачи крутящего момента.2. Система управления по п.1, отличающаяся тем, что средство (2) управления антиблокировкой колес выполнено с возможностью определения команды антиблокировки колес в зависимости от команды передачи крутящего момента, поступившей от средства (3) управления приводом передачи крутящего момента, при этом средство (3) управления приводом передачи крутящего момента выполнено с возможностью определения команды передачи крутящего момента в зависимости от команды антиблокировки колес.3. Система управления по п.1, отличающаяся ...

Wheel`s adherence resumption detecting method for e.g. four-wheel-drive vehicle, involves determining rehabilitation conditions of vehicle`s wheel and detecting instant of resuming adherence to ground of wheel based on sliding reliability

The method involves calculating absolute sliding of a wheel (rij) from estimated speed of a motor vehicle e.g. four-wheel-drive vehicle, and measured speed of the wheel of the vehicle. An instant where the wheel starts to slide, is estimated. A non reliable character of sliding of the wheel that is established from an estimation of reference speed (Vref) of the vehicle, is defined. Rehabilitation conditions of the wheel of the vehicle, are determined. An instant of resuming adherence to the ground of the wheel, is detected based on reliability of sliding.

METHOD FOR DETECTING THE REGAINING OF GRIP OF A MOTOR VEHICLE WHEEL, AND ASSOCIATED DEVICE

The invention relates to a method and to an associated device for detecting the moment that a vehicle wheel regains grip from, on the one hand, a measurement of the speed of said wheel and an estimate of the reference speed of the vehicle and, on the other hand, an estimate of the derivative of spin, such that it comprises the following steps: - calculating the absolute spinning of the wheel from its measured speed and from the estimated speed of the vehicle; - estimating the moment at which the wheel begins to spin; - defining the unreliable nature of the spinning of the wheel established on the basis of the estimated speed of the vehicle; - determining wheel rehabilitation conditions according to the derivative of absolute spin estimated independently of the vehicle speed; - detecting the moment said wheel regains its grip on the ground as a function of the reliability of the spinning.

Brake control apparatus for four wheel drive vehicles

Verfahren zur Steuerung eines Fahrzeugs mit lediglich gebremster Hinterachse und Bremsschlupfregelung

Die Erfindung betrifft ein Verfahren zur Steuerung eines Fahrzeugs mit einer druckmittelbetätigten Bremseinrichtung (1), welche Radbremsen (10) und seitenweise Bremskreise an lediglich wenigstens einer Hinterachse (4) umfasst, sowie mit einer Antriebsmaschine, welche die Hinterräder (2) der wenigstens einen Hinterachse (4) antreibt, wobei die Hinterräder (2) zur Übertragung von Antriebs- und/oder Bremsleistung mit Vorderrädern (6) einer Vorderachse (8) wahlweise oder automatisch koppelbar oder von diesen entkoppelbar sind. Die Erfindung sieht vor, dass die Bremseinrichtung (1) bremsschlupfgeregelt wird, wobei a) falls die Vorderräder (6) von den Hinterrädern (2) entkoppelt sind, der Bremsschlupf an den Radbremsen (10) der Hinterachse (4) seitenweise individuell geregelt wird, b) falls die Vorderräder (6) mit den Hinterrädern gekoppelt sind und α) falls an wenigstens einem Vorderrad (6) kein von einem zugelassenen Bremsschlupf oder von einem zugelassenen Bremsschlupfbereich abweichender Bremsschlupf detektiert wird, der Bremsschlupf an den Radbremsen (10) der Hinterachse (4) seitenweise individuell geregelt wird, oder β) falls an allen Vorderrädern (6) ein von einem zugelassenen Bremsschlupf oder von einem zugelassenen Bremsschlupfbereich abweichender Bremsschlupf detektiert wird, der Bremsschlupf an wenigstens einem Rad (10) der Hinterachse (4) so geregelt wird, dass wenigstens ein Vorderrad (6) mit dem zugelassenen Bremsschlupf oder mit einem Bremsschlupf ... The invention relates to a method for controlling a vehicle with a pressure medium-actuated brake device (1), which wheel brakes (10) and side brake circuits on only at least one rear axle (4), and with a prime mover, which the rear wheels (2) of the at least one rear axle (4) drives, wherein the rear wheels (2) for transmitting drive and / or braking power with front wheels (6) of a front axle (8) are selectively or automatically coupled or decoupled from these. The invention provides that the braking device ...

Fahrzeug mit einer Bremsmoment von Hinterrädern auf die Vorderräder übertragenden Bremseinrichtung mit Bremsschlupfregelung

Fahrzeug mit einer Bremseinrichtung (1), bei welcher beim Bremsen durch in Kopplungsstellung gebrachte Kopplungsmittel (36) die Vorderräder (6) einer Vorderachse (8) und die Hinterräder (2) wenigstens einer Hinterachse (4) miteinander starr gekoppelt sind und zwischen den Hinterrädern (2) und den Vorderrädern (6) Bremsmoment übertragen wird, beinhaltend: a) ein Steuergerät (28) zum bremsschlupfgeregelten Betrieb der Bremseinrichtung (1) in einem Zustand, in welchem die Kopplungsmittel (36) in Kopplungsstellung gebracht sind, b) wenigstens einen Drehzahlsenor (54, 58) in einem Antriebsstrang (50) des Fahrzeugs zum Einsteuern von das Drehverhalten der gekoppelten Vorderräder (6) und Hinterräder (2) repräsentierenden Drehzahlsignalen in das Steuergerät (28), gekennzeichnet durch c) wenigstens einen Beschleunigungssensor (30) zum Einsteuern von die Fahrzeuglängsbeschleunigung repräsentierenden Beschleunigungssignalen in das Steuergerät (28) und/oder eine Fahrzeug-GPS-Einrichtung zum Einsteuern von Positionen des Fahrzeugs repräsentierenden Positionssignalen in das Steuergerät (28), wobei d) das Steuergerät (28) ausgebildet ist, dass es basierend auf den Beschleunigungssignalen und/oder auf...

Vehicular brake control apparatus

METHOD FOR REGULATING THE SLIPPAGE OF THE WHEELS OF A VEHICLE ALL OF WHOSE WHEELS ARE DRIVEN.

PROCEEDED OF REGULATION OF the SLIP OF the WHEELS Of a VEHICLE OF WHICH ALL the WHEELS ARE DRIVING.

Bremsregelvorrichtung für Fahrzeuge mit Vierradantrieb

SCHÄTZUNG DER FAHRZEUGGESCHWINDIGKEIT BEI FAHRZEUGEN MIT ALLRADANTRIEB

Die Offenbarung stellt eine Schätzung der Fahrzeuggeschwindigkeit bei Fahrzeugen mit Allradantrieb bereit. Ein Fahrzeug beinhaltet eine elektrische Maschine und eine Steuerung. Die Steuerung ist dazu programmiert, als Reaktion auf eine Radschlupf anzeigende Schwellendifferenz zwischen der durchschnittlichen Raddrehzahl und einer Fahrzeuggeschwindigkeit, die auf einer Differenz zwischen der Radbeschleunigung und der gemessenen Fahrzeugbeschleunigung basiert, der elektrischen Maschine eine Drehzahl zu befehlen, um den Radschlupf zu verringern.

Antiskid control system for four-wheel-drive vehicle

An antiskid control system for a four-wheel-drive vehicle is arranged to calculate a difference between an average of wheel accelerations of front wheels and an average of wheel acceleration of rear wheels. When the difference is greater than or equal to the vibration determination threshold, the antiskid control system determines that a driveline vibration is generated and executes a control for converging the driveline vibration.

Vehicle driving force control

A driving force control apparatus is configured to automatically apply a braking force to a plurality of wheels (5,10) in order to descend down a hill at a constant speed, such that the wheels (5,10) can be prevented from being locked by the braking force, and the vehicle speed can be prevented from increasing. In order for a vehicle to travel at a preset speed, the vehicle driving force control apparatus detects the speeds of the wheels (5,10) subjected to a braking force, and switches the vehicle from a four-wheel drive (4WD) mode in which driving force is distributed to all of the wheels (5,10) to a two-wheel drive (2WD) mode in which driving force is distributed to only the front wheels (5). The switch is made when the vehicle speed is equal to or less than a lower limit threshold. The front wheels are prevented from locking, and increases in the vehicle speed are suppressed.

METHOD OF CONTROLLING A VEHICLE WHERE ONLY THE REAR AXLE IS BRAKED AND BRAKE SLIP CONTROLLER

Verfahren zum Betreiben einer Radschlupfregelungsvorrichtung mit kompensierten Radgeschwindigkeiten

Die Erfindung betrifft ein Verfahren zum Betreiben einer Radschlupfregelungsvorrichtung eines Fahrzeugs, beinhaltend eine Bestimmung von hinsichtlich Raddrehzahlunterschieden bei einer Kurvenfahrt kompensierten Radgeschwindigkeiten (vfl_c, vfr_c, vrr_c, vrl_c) von Rädern des Fahrzeugs als Eingangsgrößen für die Radschlupfregelungsvorrichtung, bei dem a) aus dem Fahrverhalten des Fahrzeugs während der Kurvenfahrt ein neutralsteuernder, untersteuernder oder übersteuernder Fahrzustand des Fahrzeugs ermittelt wird, b) abhängig von dem ermittelten neutralsteuernden, untersteuernden oder übersteuernden Fahrzustand des Fahrzeugs entweder die Referenz-Gierrate (z_ref) oder die Ist-Gierrate (z_meas) für die zur Berechnung eines auf einen gewählten Punkt am Fahrzeug bezogenen Kurvenradius (Rra_ref oder Rra_meas) herangezogen wird, c) aus dem auf den gewählten Punkt bezogenen Kurvenradius (Rra_ref oder Rra_meas) radbezogene Kurvenradien (Rrl, Rrr, Rfl, Rfr) für wenigstens einige der Räder des Fahrzeugs ...

Skid detection apparatus for vehicle

本发明提供一种车辆的打滑检测装置，其在四轮驱动车辆中也能高精度地检测打滑。检测前后轮的旋转速度，根据检测到的前后轮的旋转速度来计算实际后轮左右车轮速度比(实际的后轮左右车轮速度比)(S10)，根据计算出的实际后轮左右车轮速度比，检索假设为前后轮抓地行驶而预先计算并存储的前后车轮滑动比相对于后轮左右车轮速度比的特性，计算抓地行驶时的前后车轮滑动比(S12)，根据检测到的前后轮的旋转速度来计算实际前后车轮滑动比(实际的前后车轮滑动比)(S14)，根据计算出的抓地行驶时的前后车轮滑动比与实际前后车轮滑动比之差，判断打滑(S16)。

Fahrzeug mit einer Bremsmoment von Hinterrädern auf die Vorderräder übertragenden Bremseinrichtung mit Bremsschlupfregelung

Fahrzeug mit einer Bremseinrichtung (1), bei welcher beim Bremsen durch in Kopplungsstellung gebrachte Kopplungsmittel (36) die Vorderräder (6) einer Vorderachse (8) und die Hinterräder (2) wenigstens einer Hinterachse (4) miteinander starr gekoppelt sind und zwischen den Hinterrädern (2) und den Vorderrädern (6) Bremsmoment übertragen wird, beinhaltend: a) ein Steuergerät (28) zum bremsschlupfgeregelten Betrieb der Bremseinrichtung (1) in einem Zustand, in welchem die Kopplungsmittel (36) in Kopplungsstellung gebracht sind, wobei bei Kopplung der Vorderräder mit den Hinterrädern auch die Vorderräder bremsschlupfgeregelt abgebremst sind, b) wenigstens einen Drehzahlsensor (54, 58) in einem Antriebsstrang (50) des Fahrzeugs zum Einsteuern von das Drehverhalten der gekoppelten Vorderräder (6) und Hinterräder (2) repräsentierenden Drehzahlsignalen in das Steuergerät (28), dadurch gekennzeichnet, dass die wahlweise oder automatisch in Kopplungsstellung bringbaren Kopplungsmittel (36) zwischen den Hinterrädern (2) und den Vorderrädern (6) auch zum Übertragen von Antriebsmoment zwischen den Hinterrädern (2) und den Vorderrädern (6) vorgesehen sind, c) und dass die Kopplungsmittel (36) ein einen Teilantriebsstrang (40, 44, 48) der Hinterachse (4) und einen Teilantriebsstrang (38, 42, 46) der Vorderachse (8) koppelndes und durch das Steuergerät (28) sperr- und entsperrbares Differential (36) umfassen, welches zum Bremsen vom Steuergerät (28) automatisch gesperrt wird, und dass d) wenigstens ein Beschleunigungssensor (30) zum Einsteuern von die Fahrzeuglängsbeschleunigung repräsentierenden Beschleunigungssignalen in das Steuergerät (28) vorgesehen ist, wobei e) das Steuergerät (28) ausgebildet ist, dass es basierend auf den Beschleunigungssignalen wenigstens eine eine Fahrzeugreferenzgeschwindigkeit und/oder eine Fahrzeugreferenzbeschleunigung charakterisierende erste Größe und basierend auf den Drehzahlsignalen eine das Drehverhalten der gekoppelten Vorderräder (6) und ...

Method for improved anti-lock braking control for all-wheel drive vehicles having a viscous coupling or a viscous lock

A method for controlling a braking system in an all-wheel drive vehicle having a viscous coupling or a viscous lock, wherein a viscous torque acting on a wheel is estimated, the viscous torque is taken into account in estimating a desired braking pressure for the wheel, and the desired braking pressure is applied to the wheel.

Antiskid control system for four-wheel-drive vehicle

An antiskid control system for a four-wheel-drive vehicle is arranged to calculate a difference between an average of wheel accelerations of front wheels and an average of wheel acceleration of rear wheels. When the difference is greater than or equal to the vibration determination threshold, the antiskid control system determines that a driveline vibration is generated and executes a control for converging the driveline vibration.

Vehicle skid detection device

FOUR-WHEEL OFF-ROAD VEHICLE HAVING AN ANTI-LOCK BRAKING SYSTEM ASSEMBLY

An off-road vehicle has two front wheels and two rear wheels, the rear wheels being connected to a spool gear driven by a motor. The vehicle also has a left front brake, a right front brake and a single rear brake. Speeds of left and right front wheels are respectively monitored by left and right front speed sensors. A single sensor monitors a common speed of left and right rear wheels. Two user actuated braking input devices, for example a hand lever and a foot lever, may be used independently or concurrently to provide a braking command. An anti-lock braking system may use speed measurements from the various speed sensors to control selective application of pressure on the left front brake, the right front brake and the rear brake.

Method and circuit arrangement for the control of wheel slip in vehicles with all-wheel drive

In order to control the wheel slip with an anti-lock brake system, in a vehicle with all-wheel drive and lockable differentials (29, 33), in particular with a lockable distribution differential (29), further braking pressure rise in the rear-wheel brakes (9, 10) is prevented for a predetermined period of time, with the locks (34, 35) engaged and with slip control activated. As a result, the driving stability of the vehicle is increased during braking with slip control and with the differential locks (34, 35) engaged.

Method for Improved Anti-lock Braking Control for All-wheel Drive Vehicles Having a Viscous Coupling or a Viscous Lock

ABS-Regellogik mit Gelände-Modul

Verfahren zur Bestimmung einer Referenzgeschwindigkeit für ein Antiblockierbremssystem eines Fahrzeugs mit Vierradantrieb

Brake control apparatus for four wheel drive vehicles

A vehicle is equipped with a coupling such as, for example, a center differential (3) or a variable clutch (90), that transmits a driving force from an engine (1) to a front-wheel drive shaft (4F) and a rear-wheel drive shaft (4R) while allowing a difference in rotational speed therebetween and a brake controller (50) that individually controls braking forces to be applied to wheels in accordance with a running state of the vehicle. A vehicular brake controller (50, S210) prohibits braking force control from being started if the coupling is in its locked state or when the coupling causes a relatively great connecting strength to exist between the fron-wheel and rear-wheel drive shafts. While braking force control is being performed by the brake controller (50), braking force control is continued even if there is a command to cause the coupling to be locked or to achieve the great coupling strength.

Skid detection apparatus for vehicle

Bremsregelvorrichtung für Fahrzeuge mit Vierradantrieb

Bremssteuerung für Allradfahrzeuge mit Viskosekupplung

Vehicular brake control apparatus

Fahrzeugnutzbremsung mit Radschlupfsteuerung und Gierstabilitätssteuerung

Es werden Verfahren und Systeme zum Betreiben eines Hybridfahrzeugs während Betriebsbedingungen bereitgestellt, bei denen Fahrzeugbremsen angefordert wird. In einem Beispiel wird Nutzbremsen Fahrzeugrädern als Reaktion auf tatsächliche und geschätzte Fahrzeuggierung zugewiesen. Zusätzlich wird Reibungsbremsmoment Fahrzeugrädern als Reaktion auf angefordertes Bremsmoment und Nutzbremsmomente zugewiesen.

VERFAHREN UND SCHALTUNGSANORDNUNG FUER FAHRZEUGE MIT ALLRADANTRIEB ZUR REGELUNG DES RADSCHLUPFES

Antischlupf-Steuersystem für ein vierradgetriebenes Fahrzeug

Die Erfindung betrifft ein Antischlupf-Steuersystem für ein vierradgetriebenes Fahrzeug, das ausgelegt ist, um eine Differenz zwischen einem Durchschnittswert der Radbeschleunigungen der Vorderräder und einem Durchschnittswert der Radbeschleunigungen der Hinterräder zu berechnen. Wenn diese Differenz größer ist oder gleich einem Grenzwert, der für die Bestimmung der Antriebszug-Schwingung steht, besteht das Antischlupf-Steuersystem, dass eine Antriebszug-Schwingung erzeugt wird und führt eine Steuerung aus, um diese Antriebszug-Schwingung zu konvergieren bzw. zu vermindern.

Anordnung für eine blockiergeschützte Bremsanlage

METHOD FOR CONTROLLING A VEHICLE HAVING ONLY A BRAKED REAR AXLE AND BRAKE SLIP CONTROL

A method is described for controlling a vehicle having a pressure-medium-activated brake device which includes wheel brakes and brake circuits on each side, on only at least one rear axle, and having a drive engine which drives the rear wheels of the at least one rear axle, in which the rear wheels can be optionally or automatically coupled to or decoupled from front wheels of a front axle in order to transmit driving and/or braking power. Also described is a vehicle having a brake device which includes wheel brakes and brake circuits on each side on only at least one rear axle, and having a drive engine which drives the rear wheels of the at least one rear axle, in which the rear wheels can be optionally or automatically coupled to or decoupled from the front wheels of a front axle in order to transmit driving and/or braking power.

Anti-lock braking system for four wheel drive motor vehicle

The ABS system measures the speed of each wheel, followed by the longitudinal acceleration or deceleration. A "misalignment value" is calculated next. Then it is ascertained whether the four wheels are all turning. If the four wheels are not turning, an estimated vehicle speed is passed to the ABS control unit as a function of the wheel speeds along with the sum of the acceleration or deceleration and the "misalignment value". If the wheels are all turning, the same happens except that the misalignment value is omitted. If the lowest of the wheel speeds is higher than the estimated vehicle speed, then it is known that all the wheels are turning.

SYSTEM FOR CONTROLLING A TORQUE TRANSFER ACTUATOR WITH MULTIPLE MODES OF OPERATION

System for controlling a torque transfer actuator (5) for a four-wheel drive motor vehicle, comprising determining means (1) and a system for preventing the wheels from locking, characterized in that it comprises: a control means (2) for preventing the wheels from locking and a control means (3) for the torque transfer actuator, which means are able to interact in order to transmit the torque transfer command destined for the torque transfer actuator (5).

Method for improved anti-lock braking control for all-wheel drive vehicles having a viscous coupling or a viscous lock

A method for controlling a braking system in an all-wheel drive vehicle having a viscous coupling or a viscous lock, wherein a viscous torque acting on a wheel is estimated, the viscous torque is taken into account in estimating a desired braking pressure for the wheel, and the desired braking pressure is applied to the wheel.

Process for controlling travel state during braking in vehicle

A method of controlling the driving state of a vehicle in which an antilock brake control for eliminating a locking tendency of a wheel during braking can be carried out, and a four-wheel drive state and a two-wheel drive state can be switched from one to another. A monitored estimated vehicle speed is calculated on the basis of highest one of wheel speeds of the vehicle wheels and a value is detected by a longitudinal acceleration/deceleration sensor for detecting a longitudinal acceleration or deceleration of a vehicle speed, and a judgement speed is determined at a value lower than the monitored estimated vehicle speed. The vehicle speed is also independently determined based upon the speed of each of the vehicle wheels. The four-wheel drive state is switched to the two-wheel drive state in response to highest one of vehicle speeds independently calculated on the basis of the wheel speeds becoming equal to or less than the judgement speed in the four-wheel drive state. Thus, when the ...

Vehicular brake control apparatus and vehicular brake control method

A vehicle is equipped with a coupling such as, for example, a center differential or a variable clutch, that transmits a driving force from an engine to a front-wheel drive shaft and a rear-wheel drive shaft while allowing a difference in rotational speed therebetween and a brake controller that individually controls braking forces to be applied to wheels in accordance with a running state of the vehicle. A vehicular brake controller prohibits braking force control from being started if the coupling is in its locked state or when the coupling causes a relatively great connecting strength to exist between the front-wheel and rear-wheel drive shafts. While braking force control is being performed by the brake controller, braking force control is continued even if there is a command to cause the coupling to be locked or to achieve the great coupling strength.

Anti-lock braking system for motor vehicle that can be driven in two or four-wheel drive mode

The ABS system is for a vehicle that can be switched between two-wheel and four-wheel drive. The wheel speeds are all measured, as is the vehicle acceleration or deceleration. Then from the latter and just the highest wheel speed is estimated the vehicle speed. The vehicle speed is also estimated from all four wheel speeds. The higher of these two vehicle speed estimates is compared with a speed that is a certain amount below the first value estimated, denoted as a "qualification speed". If higher speed estimate is equal to, or less than, this qualification speed for a certain length of time and the vehicle is already in 4WD mode, it is switched to 2WD mode.

Bremssteuerung für Allradfahrzeuge mit Viskosekupplung

Verfahren und System zum Steuern eines Bremsens eines Fahrzeugs

Es werden ein Verfahren und ein System zum Steuern eines Bremsens eines Fahrzeugs bereitgestellt. Wenn eine Trennvorrichtung (6) abgekoppelt wird/ist und ein Hilfsantriebsrad von einem Antriebssystem getrennt wird/ist, wird ein Fahrzeugbremsen mittels eines regenerativen Bremsens mittels eines Primärantriebsradmotor während eines Bremsens durchgeführt. Dann wird eine Trennvorrichtung (6) basierend auf einem Fahrzeugstabilitätszustand gekoppelt (z.B. geschlossen), und dann wird ein gleichzeitiges Bremsen mittels des Hilfsantriebrads und des Primärantriebrads durchgeführt.

Estimation of vehicle speed in all-wheel-drive vehicle

A vehicle includes an electric machine and a controller. The controller is programmed to responsive to a threshold difference, indicative of wheel slip, between average wheel speed and a vehicle speed that is based on a difference between wheel acceleration and measured vehicle acceleration, command a speed to the electric machine to reduce the wheel slip.

VEHICLE HAVING A BRAKE DEVICE WHICH TRANSFERS A BRAKING TORQUE FROM REAR WHEELS TO THE FRONT WHEELS, WITH BRAKE SLIP CONTROL

VEHICLE HAVING A BRAKE DEVICE WHICH TRANSFERS A BRAKING TORQUE FROM REAR WHEELS TO THE FRONT WHEELS, WITH BRAKE SLIP CONTROL

The invention relates to a vehicle having a brake device (1) in which, during braking, the front wheels (6) of a front axle (8) and the rear wheels (2) of at least one rear axle (4) are rigidly coupled to one another, and braking torque is transferred between the rear wheels (2) and the front wheels (6), by coupling means (36) brought into a coupling position. The invention is characterized by: a) a control unit (28) for brake-slip-controlled operation of the brake device (1) in a state in which the coupling means (36) are brought into the coupling position, b) at least one rotational speed sensor (54, 58) in a drivetrain (50) of the vehicle for inputting into the control unit (28) rotational speed signals representing the rotational behaviour of the coupled front wheels (6) and rear wheels (2), c) at least one acceleration sensor (30) for inputting into the control unit (28) acceleration signals representing the vehicle longitudinal acceleration, and/or a vehicle GPS device for inputting into the control unit (28) position signals representing positions of the vehicle, wherein d) the control unit (28) is designed so as to determine at least one first variable, which is characteristic of a vehicle reference speed and/or a vehicle reference acceleration, on the basis of the acceleration signals and/or the position signals, and so as to determine a second variable, which is characteristic of the rotational behaviour of the coupled front wheels (6) and rear wheels (2), on the basis of the rotational speed signals, and to calculate the brake slip of the coupled front wheels (6) and rear wheels (2) on the basis of the first variable and the second variable.

Skid detection apparatus for vehicle

In an apparatus for detecting a skid occurred on a four-wheel drive vehicle having a prime mover and a transmission, an actual rear right/left wheel speed ratio between the rear right/left wheel speeds is calculated based on detected front and rear wheel rotational speeds (S10), a front/rear wheel slip ratio during grip-driving is calculated by retrieving characteristics of a front/rear wheel slip ratio set with respect to a rear right/left wheel speed ratio using the calculated actual rear right/left wheel speed ratio (S12), an actual front/rear wheel slip ratio is calculated based on the detected front wheel rotational speed and the rear wheel rotational speed (S14), and occurrence of skid is then determined based on a difference between the calculated front/rear wheel slip ratio during grip-driving and the calculated actual front/rear wheel slip ratio (S16).

METHOD FOR CONTROLLING A VEHICLE HAVING ONLY A BRAKED REAR AXLE AND BRAKE SLIP CONTROL

Method for controlling a vehicle having a pressure medium-actuated brake device (1), which comprises wheel brakes (10) and brake circuits on each side at only at least one rear axle (4), and having an engine which drives the rear wheels (2), wherein the rear wheels (2) can be coupled to front wheels (6) of a front axle (8) for transmitting driving and/or braking power, wherein a) in case the front wheels (6) are decoupled from the rear wheels (2), the brake slip at the wheel brakes (10) of the rear axle (4) is individually controlled for each side, b) in case the front wheels (6) are coupled to the rear wheels, and α) in case at least at one front wheel (6) no brake slip deviating from an allowed brake slip or from an allowed brake slip range is detected, the brake slip at the wheel brakes (10) of the rear axle (4) is individually controlled for each side, or ß) in case a deviating brake slip is detected at all front wheels (6), the brake slip at least at one wheel (10) of the rear axle ...

METHOD FOR CONTROLLING ABS OF ALL-WHEEL DRIVING VEHICLE WITH VISCOUS COUPLING OR LOCK

PURPOSE: An ABS(anti-lock brake system) control method of an all-wheel driving vehicle including a viscous coupling or lock is provided to improve performance of a brake by increasing and decreasing braking pressure with detecting torque accurately from the viscous coupling or lock. CONSTITUTION: The viscous torque applied to wheels(9) is calculated, and braking pressure of the wheel is operated according to viscous torque. The braking pressure is applied to the wheel. Braking pressure is calculated corresponding to viscous torque in case of the viscous torque to be less than zero. The viscous torque is calculated with function of difference between front axle cardan shaft speed and rear axle cardan shaft speed corresponding to reduction factors. The reduction factor is zero in operating the viscous coupling or the viscous lock abnormally. A control unit regulates the braking pressure of the wheel corresponding to torque applied to the viscous coupling or the viscous lock. The performance ...

Method and apparatus for an automatic brake intervention control and control device

A system for an automatic brake intervention control in an all-wheel-drive vehicle having an automatic brake control system, comprises a control device and separately actuatable brakes which are assigned to the individual wheels. The control device generates signals to control individual brakes as a function of wheel compression and rebounding travels or the wheel reaction forces detected at the individual wheels. Wheel signals are generated which correspond to the wheel suspension travels, the wheel reaction forces or quantities derived therefrom, and the wheel signals are supplied to the control device. The control device generates the signals for controlling the individual brakes at least as a function of the individual wheel signals present as input information.

ANTI-SKID CONTROLLER FOR FOUR WHEEL DRIVE VEHICLE

PROBLEM TO BE SOLVED: To provide an anti-skid controller for a four wheel drive vehicle capable of preventing erroneous judgement when it runs on a bad road to detect the vibration of a drive system surely, executing drive system vibration conver gence processing only when the vibration of the drive system occurs, and preventing the occurrence of inconveniences such as dislocation of deceleration, insufficiency of deceleration, and increase of braking stop distance due to errone ous judgement. SOLUTION: An absolute value of a difference between an average value VWDFA of wheel acceleration VWDFL, VWDFR of left and right front wheels 14, 10 and an average value VWDRA of wheel acceleration VWDRL, VWDRR of left and right rear wheels 22, 20 is calculated as a difference in acceleration, DVWD-FR(=|VWDFA-VWDRA|), and it is judged that the vibration of the drive system occurs if the difference in acceleration, DVWD-FR, exceeds vibration judgement advance threshold value DVWDVIB#. COPYRIGHT: (C) ...

Braking control method and system for eco-friendly vehicle

A braking control method for a vehicle is provided. The vehicle distributes and transmits a driving force of a vehicle driving source to front and rear wheels based on a power distribution rate. The method includes determining a total braking force based on a brake signal corresponding to brake pedal manipulation, calculating a front and rear wheel braking force satisfying the total braking force, and calculating a regenerative and frictional braking force satisfying the total braking force. The method further includes determining a power distribution rate range to the front and rear wheels during braking using the calculated front and rear wheel braking force and regenerative braking force, determining a power distribution rate to the front and rear wheels based on a vehicle driving condition, within the determined power distribution rate range; and adjusting distribution of the power to the front and rear wheels at the power distribution rate.

Antiskid control system for four-wheel-drive vehicle

An antiskid control system for a four-wheel-drive vehicle is arranged to calculate a difference between an average of wheel accelerations of front wheels and an average of wheel acceleration of rear wheels. When the difference is greater than or equal to the vibration determination threshold, the antiskid control system determines that a driveline vibration is generated and executes a control for converging the driveline vibration.

METHOD AND SYSTEM FOR PROGRESSIVE ENGAGEMENT OF ALL-WHEEL DRIVE

The invention provides a method of progressive engagement of all-wheel drive for a mobile vehicle. A set of vehicle parameters is sensed, and an all-wheel drive lock value is determined based on the sensed set of vehicle parameters. Vehicle subsystem control activation is determined, and the all-wheel drive lock value is adjusted based on the vehicle subsystem control activation determination. An all-wheel drive controller is engaged based on the adjusted all-wheel drive lock value.

BRAKING CONTROL DEVICE FOR VEHICLE

A braking control device includes: a wheel deceleration deriving section that derives decrease rates of wheel speed detection values as wheel deceleration calculation values; an average value deriving section that derives an average value of the wheel deceleration calculation values of wheels FL, FR, RL, and RR as a wheel deceleration average value; a determination section that determines, based on the wheel deceleration average value and an anteroposterior deceleration detection value, whether or not a slip increase state has been occurring for a determination time or longer; and a detection section that detects occurrence of cascade lock when it is determined that the slip increase state has been occurring for the determination time or longer during vehicle braking.

Brake control apparatus for four wheel drive vehicles

A vehicle is equipped with a coupling such as, for example, a center differential (3) or a variable clutch (90), that transmits a driving force from an engine (1) to a front-wheel drive shaft (4F) and a rear-wheel drive shaft (4R) while allowing a difference in rotational speed therebetween and a brake controller (50) that individually controls braking forces to be applied to wheels in accordance with a running state of the vehicle. A vehicular brake controller (50, S210) prohibits braking force control from being started if the coupling is in its locked state or when the coupling causes a relatively great connecting strength to exist between the fron-wheel and rear-wheel drive shafts. While braking force control is being performed by the brake controller (50), braking force control is continued even if there is a command to cause the coupling to be locked or to achieve the great coupling strength.

Verfahren zur Bremseingriffsregelung und Steuereinrichtung

Verfahren zum Steuern des Antriebszustands eines Fahrzeugs mit zuschaltbarem Vierradantrieb und einem Antiblockierregelsystem während der Bremsung des Fahrzeugs

Electronic 4WD system having reinforced ABS cooperative control performance and method of controlling same

The present invention relates to an electronic 4WD system having reinforced ABS cooperative control performance, in which an ABS ACT signal by an ABS (Anti-Lock Brake System) controller and a 4WD_OPEN signal by the ESC (Electronic Stability Control) controller are used. When the ABS ACT signal and the 4WD_OPEN signal are recognized, it is determined that it is an ESC vehicle and a 4WD mode is stopped. When only the ABS ACT signal is recognized, it is determined that it is an ABS vehicle and the intention of a user is determined on the basis of whether a brake pedal has been pressed down or an accelerator pedal has been released, and then a 4WD mode is stopped.

SYSTEM FOR CONTROLLING A TORQUE TRANSFER ACTUATOR WITH MULTIPLE MODES OF OPERATION

System for controlling a torque transfer actuator (5) for a four-wheel drive motor vehicle, comprising determining means (1) and a system for preventing the wheels from locking, characterized in that it comprises: a control means (2) for preventing the wheels from locking and a control means (3) for the torque transfer actuator, which means are able to interact in order to transmit the torque transfer command destined for the torque transfer actuator (5).

Verfahren zur Bremseingriffsregelung und Steuereinrichtung

Die Erfindung betrifft ein Verfahren zur Bremseingriffsregelung bei einem allradangetriebenen Fahrzeug mit einem Bremsregelsystem, umfassend eine Steuereinrichtung sowie den einzelnen Rädern zugeordnete und unabhängig voneinander beaufschlagbare Bremsen, wobei die Steuereinrichtung in Abhängigkeit von Eingangsinformationen Signale zur Ansteuerung der einzelnen Bremsen erzeugt. DOLLAR A Zur Bereitstellung eines Systems, das insbesondere bei allradangetriebenen Fahrzeugen auch im Gelände eine fortwährend optimale Traktion im wesentlichen sicherstellt, wird vorgeschlagen, die Radein- und -ausfederwege oder die Radaufstandskräfte an den einzelnen Rädern zu erfassen und den Radfederwegen, den Radaufstandskräften oder davon abgeleiteten Größen entsprechende Radsignale zu erzeugen und die Radsignale der Steuereinrichtung zuzuführen, so daß die Steuereinrichtung die Signale zur Ansteuerung der einzelnen Bremsen zumindest in Abhängigkeit von den als Eingangsinformationen vorliegenden, einzelnen Radsignalen generiert. The invention relates to a method for brake intervention control in an all-wheel drive vehicle with a brake control system, comprising a control device and brakes assigned to the individual wheels and which can be acted upon independently of one another, the control device generating signals for controlling the individual brakes as a function of input information. DOLLAR A In order to provide a system that, in particular in the case of all-wheel drive vehicles, also essentially ensures optimal traction even off-road, it is proposed to record the wheel deflection and rebound paths or the wheel contact forces on the individual wheels and the wheel spring paths, the wheel contact forces or derived therefrom Generate corresponding wheel signals and supply the wheel signals to the control device so that the control device generates the signals for controlling the individual brakes at least as a function of the individual wheel signals present as input information.

Regenerative vehicle braking with wheel slip control and yaw stability control

Used for control with multiple modes of operation of the actuator torque transmission system

Skid detection apparatus for vehicle

In an apparatus for detecting a skid occurred on a four-wheel drive vehicle having a prime mover and a transmission, an actual rear right/left wheel speed ratio between the rear right/left wheel speeds is calculated based on detected front and rear wheel rotational speeds, a front/rear wheel slip ratio during grip-driving is calculated by retrieving characteristics of a front/rear wheel slip ratio set with respect to a rear right/left wheel speed ratio using the calculated actual rear right/left wheel speed ratio, an actual front/rear wheel slip ratio is calculated based on the detected front wheel rotational speed and the rear wheel rotational speed, and occurrence of skid is then determined based on a difference between the calculated front/rear wheel slip ratio during grip-driving and the calculated actual front/rear wheel slip ratio.

Regenerative vehicle braking with wheel slip control and yaw stability control

Methods and systems are provided for operating a hybrid vehicle during operating conditions where vehicle braking is requested. In one example, regenerative braking is allocated to vehicle wheels responsive to actual and estimated vehicle yaw. Additionally, friction braking torque is allocated to vehicle wheels responsive to requested braking torque and regenerative braking torques.

METHOD OF CONTROLLING SLIP OF WHEEL BY ANTI-BRAKE SYSTEM ANDCIRCUIT FOR EXECUTING SAID METHOD

Method for operating a vehicle brake system

A method for operating a hydraulic motor vehicle brake system with an anti-lock brake system having a plurality of brake cylinders associated with the wheels to be braked. A central pressure generating device generates a hydraulic brake pressure, wherein the hydraulic brake pressure is distributed to the brake cylinders and may be selectively modified for individual brake cylinders or a group of brake cylinders. The hydraulic brake pressure maintained at a level exceeding an estimated brake pressure limit of each wheel.

Antilock brake control method for four-wheel drive vehicle

An antilock brake control method for a four-wheel drive vehicle including calculating an estimated vehicle speed on the basis of a wheel speed of a wheel and a value obtained by adding an offset value to an output from a longitudinal acceleration/deceleration sensor for detecting a longitudinal acceleration or deceleration of the vehicle. When it is detected that all of the four wheels are in their spinning state, the addition of the offset value to the output from the longitudinal acceleration/deceleration sensor is stopped, and the estimated vehicle speed is calculated on the basis of the wheel speed and the output from the longitudinal acceleration/deceleration sensor.

Method and system for progressive engagement of all-wheel drive

The invention provides a method of progressive engagement of all-wheel drive for a mobile vehicle. A set of vehicle parameters is sensed, and an all-wheel drive lock value is determined based on the sensed set of vehicle parameters. Vehicle subsystem control activation is determined, and the all-wheel drive lock value is adjusted based on the vehicle subsystem control activation determination. An all-wheel drive controller is engaged based on the adjusted all-wheel drive lock value.

Method for controlling a vehicle having only a braked rear axle and brake slip control

A method is described for controlling a vehicle having a pressure-medium-activated brake device which includes wheel brakes and brake circuits on each side, on only at least one rear axle, and having a drive engine which drives the rear wheels of the at least one rear axle, in which the rear wheels can be optionally or automatically coupled to or decoupled from front wheels of a front axle in order to transmit driving and/or braking power. Also described is a vehicle having a brake device which includes wheel brakes and brake circuits on each side on only at least one rear axle, and having a drive engine which drives the rear wheels of the at least one rear axle, in which the rear wheels can be optionally or automatically coupled to or decoupled from the front wheels of a front axle in order to transmit driving and/or braking power.

Method and system of controlling braking of vehicle

A method of controlling braking of a vehicle is provided. When a disconnector is disconnected and an auxiliary drive wheel is separated from a driving system, vehicle braking is performed with regenerative braking by a primary drive wheel motor during braking. Subsequently, the disconnector is connected based on a vehicle stability state, and then, braking is performed simultaneously on the auxiliary drive wheel and a primary drive wheel.

DRIVE STATE SELECTION CONTROL FOR VEHICLE EQUIPPED WITH ANTILOCK BRAKE CONTROLLER

PURPOSE: To prevent the fact that four wheels are locked graually when the brake operating force is weak in the four-wheel drive state, in the drive state selection control for a vehicle equipped with an antilock brake controller which can execute the antilock brake control for dissolving the lock inclination of the wheel in brake application and can select the four-wheel drive state and the two-wheel drive state. CONSTITUTION: The estimated car body speed GVR4L for monitor is calculated on the basis of the highest wheel speed among the wheel speed of each wheel and each detection value of an acceleration/deceleration sensor in the longitudinal direction for detecting the acceleration/deceleration in the longitudinal direction of the car body. The judgement speed GVR1 is determined by the lowering in comparison with the estimated car body speed GVR4L for monitor, and when the max. estimated car body speed among the car estimated car body speed calculated individually on the basis of each ...

Estimation of vehicle speed in all-wheel drive vehicle

Vehicle having a brake device which transfers a braking torque from rear wheels to the front wheels, with brake slip control

A control unit for brake-slip-controlled operation of the brake device in a state in which braking torque is transferred from the rear to the front wheels by the coupling arrangement, at least one rotational speed sensor in a drive train of the vehicle for inputting into the control unit rotational speed signals representing the rotational behavior of the coupled front wheels and rear wheels, at least one acceleration sensor for inputting into the control unit acceleration signals representing the vehicle longitudinal acceleration, and/or a vehicle GPS device for inputting into the control unit position signals representing positions of the vehicle, the control unit determining at least one first variable, which is characteristic of a vehicle reference speed and/or a vehicle reference acceleration, based on the acceleration and/or position signals, and so as to determine a second variable, which is characteristic of the rotational behavior of the coupled front and rear wheels, based on ...

ESTIMATION OF VEHICLE SPEED IN ALL-WHEEL-DRIVE VEHICLE

A vehicle includes an all-wheel-drive powertrain having an electric machine configured to power wheels. A controller is programmed to output a first calculated vehicle speed derived from integrating a measured longitudinal acceleration of the vehicle and output a second calculated vehicle speed based on the measured longitudinal acceleration and a speed of one of the wheels. The controller is further programmed to, responsive to a flag being present, command a speed to the electric machine that is based on the first vehicle speed to reduce wheel slip, and responsive to a flag not being present, command a speed to the electric machine that is based on the second vehicle speed to reduce wheel slip.

METHOD AND SYSTEM OF CONTROLLING BRAKING OF VEHICLE

A method of controlling braking of a vehicle is provided. When a disconnector is disconnected and an auxiliary drive wheel is separated from a driving system, vehicle braking is performed with regenerative braking by a primary drive wheel motor during braking. Subsequently, the disconnector is connected based on a vehicle stability state, and then, braking is performed simultaneously on the auxiliary drive wheel and a primary drive wheel. 1. A method of controlling braking of a vehicle having a first independent driving unit configured to drive front wheels , a second independent driving unit configured to drive rear wheels , and a disconnector that is installed in a driving shaft and makes and releases a connection for motive power transfer , the method comprising:determining, by a controller, a current vehicle stability index based on information collected within the vehicle;connecting or disconnecting, by the controller, the disconnector based on the determined vehicle stability index, andperform, by the controller, regenerative braking for all of the front and rear wheels of the vehicle, or for either the front wheels or the rear wheels based on a controlled state of the disconnector.2. The method according to claim 1 , wherein the vehicle is a four-wheel-drive electric vehicle that has a front wheel motor and a rear wheel motor claim 1 , as the driving units claim 1 , and the disconnector installed on a front wheel driving shaft of the vehicle.3. The method according to claim 2 , comprising:determining, by the controller, whether a brake pedal is operated while the vehicle is driven in a state where the disconnector is disconnected to release the connection for the motive power transfer;determining, by the controller, the current vehicle stability index based on the information collected within the vehicle and comparing the determined vehicle stability index with a preset reference value, in response to determining that the brake pedal is operated,comparing, by ...

VEHICLE WITH BRAKE TRACTION CONTROL AND METHOD FOR CONTROLLING TRACTION OF A VEHICLE

A vehicle includes front suspension assemblies; rear suspension assemblies; a left driven wheel and a right driven wheel with first left and right brake assemblies; a left wheel and a right wheel with second left and right brake assemblies; an anti-lock braking system (ABS) module; a drive mode coupler connected between the transmission and the left and right wheels for changing between a 2×4 and a 4×4 drive configuration; and a drive mode switch for controlling the drive mode coupler, the ABS module selectively performing brake traction control of at least one wheel based on the position of the drive mode switch. A method for controlling traction of the vehicle includes sensing the drive mode switch position and when the drive mode changes from a 2×4 position to a 4×4 position, causing the ABS module to perform brake traction control on at least one wheel.

Braking control for all-wheel drive vehicles with viscous clutch

VEHICLE DRIVING FORCE CONTROL APPARATUS

A driving force control apparatus is configured to automatically apply a braking force to a plurality of wheels in order to descend down a hill at a constant speed, such that the wheels can be prevented from being locked by the braking force, and the vehicle speed can be prevented from increasing. In order for a vehicle to travel at a preset speed, the vehicle driving force control apparatus detects the speeds of the wheels subjected to a braking force, and switches the vehicle from a four-wheel drive (4WD) mode in which driving force is distributed to all of the wheels to a two-wheel drive (2WD) mode in which driving force is distributed to only the front wheels. The switch is made when the vehicle speed is equal to or less than a lower limit threshold. The front wheels are prevented from locking, and increases in the vehicle speed are suppressed.

ANTILOCK BRAKE CONTROL METHOD FOR FOUR-WHEEL DRIVE VEHICLE

PURPOSE: To prevent unnecessary antilock brake control by stopping addition of an offset value to an output of a longitudinal directional acceleration/ deceleration sensor, and calculating an estimated car body speed based on a wheel speed and the output of the longitudinal direction acceleration/ deceleration sensor, when four wheels are detected all in a spin condition. CONSTITUTION: In each car body speed estimating means 29FL, 29FR, 29RL, 29RR, basically based on a value obtained by adding longitudinal directional acceleration/deceleration α' obtained in an acceleration/deceleration arithmetic means 24 to wheel speeds VWFL, VWFR, VWFL, VWRR obtained by each wheel speed sensor 20FL, 20FR, 20RL, 20RR, estimated car body speeds VRFL, VRFR, VRRL, VRRR are calculated via filters 26FL, 26FR, 26RL, 26RR. When a spin of four wheel is detected by a four-wheel spin detecting means 37, in the car body speed estimating means 29FL, 29FR, 29RL, 29RR, a value of removing an offset value S0 from an ...

Device for fixing or bringing a vehicle in a certain position

The invention relates to a device for adjusting or supporting in particular a caravan or another vehicle in a horizontal position, to which end height-adjustable support members mounted at the angular points of the caravan, driving members for height adjustment of the support members, a position detection member and control means for determining the position of the caravan in relation to a reference position dependent on position dectection signals from the position detection member and driving the driving members for the support members dependent of the detected position have been provided.

Four-wheel off-road vehicle having an anti-lock braking system assembly

An off-road vehicle has two front wheels and two rear wheels, the rear wheels being connected to a spool gear driven by a motor. The vehicle also has a left front brake, a right front brake and a single rear brake. Speeds of left and right front wheels are respectively monitored by left and right front speed sensors. A single sensor monitors a common speed of left and right rear wheels. Two user actuated braking input devices, for example a hand lever and a foot lever, may be used independently or concurrently to provide a braking command. An anti-lock braking system may use speed measurements from the various speed sensors to control selective application of pressure on the left front brake, the right front brake and the rear brake.

METHOD FOR CONTROLLING A VEHICLE HAVING ONLY A BRAKED REAR AXLE AND BRAKE SLIP CONTROL

Brake actuating regulation procedure and control arrangement

ESTIMATION OF VEHICLE SPEED IN ALL-WHEEL-DRIVE VEHICLE

A vehicle includes an electric machine and a controller. The controller is programmed to responsive to a threshold difference, indicative of wheel slip, between average wheel speed and a vehicle speed that is based on a difference between wheel acceleration and measured vehicle acceleration, command a speed to the electric machine to reduce the wheel slip. 1. A vehicle comprising:an electric machine; and responsive to a threshold difference, indicative of wheel slip, between average wheel speed and a vehicle speed that is based on a difference between wheel acceleration and measured vehicle acceleration, command a speed to the electric machine to reduce the wheel slip, and', 'otherwise, command a torque to the electric machine., 'a controller programmed to'}2. The electric machine of further comprising primary and secondary axles claim 1 , wherein the electric machine powers one of the primary and secondary axles.3. The electric machine of further comprising a second electric machine that powers the other of the primary and secondary axles.4. The electric machine of claim 3 , wherein the controller is further programmed toresponsive to a threshold difference between average wheel speed of the other of the primary and secondary axles and the vehicle speed, command a speed to the second electric machine to reduce the wheel slip of the other of the primary and secondary axles, andotherwise, command a torque to the second electric machine.5. The electric machine of claim 1 , wherein the vehicle speed is further based on wheel measured speed.6. The electric machine of claim 1 , wherein the vehicle speed is further based on a grade offset acceleration.7. The electric machine of claim 6 , wherein the grade offset acceleration is based on a derivate of a measured speed of a slowest wheel.8. The electric machine of further comprising speed sensors each associated with one of the wheels and configured to output a signal indicative of wheel speed.9. The electric machine of ...

Vehicular brake control apparatus and vehicular brake control method

A vehicle is equipped with a coupling such as, for example, a center differential or a variable clutch, that transmits a driving force from an engine to a front-wheel drive shaft and a rear-wheel drive shaft while allowing a difference in rotational speed therebetween and a brake controller that individually controls braking forces to be applied to wheels in accordance with a running state of the vehicle. A vehicular brake controller prohibits braking force control from being started if the coupling is in its locked state or when the coupling causes a relatively great connecting strength to exist between the front-wheel and rear-wheel drive shafts. While braking force control is being performed by the brake controller, braking force control is continued even if there is a command to cause the coupling to be locked or to achieve the great coupling strength.

Braking control for all-wheel drive vehicles with viscous clutch

A method for controlling a braking system in an all-wheel drive vehicle having a viscous coupling or a viscous lock, wherein a viscous torque (MDiffK) acting on a wheel is estimated, the viscous torque (MDiffK) is taken into account in estimating a desired braking pressure Ps for the wheel, and the desired braking pressure Ps is applied to the wheel.

Braking system for a vehicle having hand and foot brake levers

A vehicle has a frame, a straddle seat, front right and left wheels, a rear wheel, a steering assembly, a motor, front right and left brakes, a rear brake, and an electronic brake control unit. The electronic brake control unit has a pump, a valve box and an electronic controller. The electronic controller is electronically connected to the pump, and valves of the valve box for controlling their operation. A hand brake lever actuates a first master cylinder and thereby actuates the front brakes through the valve box. A foot brake lever actuates a second master cylinder and thereby actuates the rear brake through the valve box.

Electronic 4wd system having reinforced abs cooperative control performance and method of controlling same

The present invention relates to an electronic 4 WD system having reinforced ABS cooperative control performance, in which an ABS ACT signal by an ABS (Anti-Lock Brake System) controller and a 4 WD_OPEN signal by the ESC (Electronic Stability Control) controller are used. When the ABS ACT signal and the 4 WD_OPEN signal are recognized, it is determined that it is an ESC vehicle and a 4 WD mode is stopped. When only the ABS ACT signal is recognized, it is determined that it is an ABS vehicle and the intention of a user is determined on the basis of whether a brake pedal has been pressed down or an accelerator pedal has been released, and then a 4 WD mode is stopped.

REGENERATIVE VEHICLE BRAKING WITH WHEEL SLIP CONTROL AND YAW STABILITY CONTROL

Methods and systems are provided for operating a hybrid vehicle during operating conditions where vehicle braking is requested. In one example, regenerative braking is allocated to vehicle wheels responsive to actual and estimated vehicle yaw. Additionally, friction braking torque is allocated to vehicle wheels responsive to requested braking torque and regenerative braking torques. 1. A vehicle operating method , comprising:receiving inputs to a controller and estimating yaw rate of a vehicle according to a model via the controller;providing a feedforward control parameter via the estimated yaw rate; andcommanding a first electric machine to generate a first regenerative braking torque responsive to the feedforward control parameter.2. The method of claim 1 , further comprising commanding the electric machine to generate the regenerative braking torque in further response to a feedback control parameter.3. The method of claim 2 , where the feedback control parameter is determined from an actual vehicle yaw rate.4. The method of claim 3 , where the feedforward control parameter is determined from an estimated vehicle yaw rate.5. The method of claim 1 , commanding a second electric machine to generate a second regenerative braking torque responsive to a braking stability threshold of the second wheel.6. The method of claim 1 , further comprising commanding the first electric machine and a second electric machine to generate equal regenerative braking torques in response to an absolute value of a total potential regenerative braking torque not being greater that twice an absolute value of a regenerative braking torque of a less capable wheel.7. The method of claim 6 , where the less capable wheel is a wheel that begins to slip when a first torque is applied to the less capable wheel claim 6 , the first torque being less than a second torque that causes a more capable wheel to begin to slip.8. A vehicle operating method claim 6 , comprising:assigning a first wheel as a ...

METHOD FOR OPERATING A VEHICLE BRAKE SYSTEM

A method for controlling a brake system of a motor vehicle wherein a central generation of brake-fluid pressure takes place electrically and essentially mechanically decoupled from the movement of a brake-actuating element. The brake pressure of individual wheels can be selectively modified depending on driving-dynamics parameters by activating hydraulic check-valve and drain-valve elements. In the case of braking events occurring before stability and/or slip limits are reached, which limits would make it necessary to use the antilock braking system and/or a stability program, the brake pressure is reduced such that the use of the hydraulic valve elements for the antilock brake system and/or the stability program is time-delayed. Further, blocking the supply of brake fluid to individual wheels or creating pressure-decrease states for individual wheels is minimized with respect to time. 1. A method for operating a vehicle brake system comprising:generating a hydraulic brake pressure;providing a brake-actuating element associated with a wheel;providing a plurality of hydraulic valve elements, including check-valve and drain-valve elements, associated with the brake system; andreducing hydraulic brake pressure without the use of the hydraulic valve elements for a period of time prior to activating the hydraulic valve elements.2. The method of wherein the brake pressure is reduced when the slip of an individual wheel reaches the estimated actual slip limit for this wheel by a predetermined percent.3. The method of wherein the brake pressure is reduced when the measured deceleration rate of the vehicle during a braking procedure drops by a predetermined value.4. The method of including a reduction of the torque of a motor for generating brake pressure claim 1 , a stoppage of the motor claim 1 , or a decelerated increase of the motor torque.5. The method of wherein the reduction of brake pressure is attenuated or not implemented when one or more of the following ...

Wheel Slip Control Apparatus Of ABS For A Four Wheel Drive Vehicle

본 발명은 안티로크 브레이크 시스템과 협력 제어하는 사륜 구동 제어기에서 부구동륜에 전달하는 토크를 제어하는 제어장치를 제공한다. 상기 사륜 구동 제어기는 캔 통신하여 안티로크 브레이크 시스템의 작동여부를 전달받으며, 작동신호가 입력되면 엔진 드래그에 의한 슬립 발생을 방지하기 위하여 부구동륜에 전달하는 토크를 적절하게 제어한다.

Vehicle having a brake device which transfers a braking torque from rear wheels to the front wheels, with brake slip control

Anti-lock brake system and its control method

본 발명은 안티 록 브레이크 시스템 및 그 제어방법에 관한 것으로, 수동변속 차량의 ABS 제어시, 기어가 인 기어상태인지 중립상태인지를 정확히 판단하여 그에 맞는 적절한 ABS 제어가 이루질 수 있도록 함으로써 ABS 제어성능을 향상시킨다. The present invention relates to an anti-lock brake system and a control method thereof. In the ABS control of a manual transmission vehicle, the ABS control performance is accurately determined by properly determining whether the gear is in the in-gear state or the neutral state so that appropriate ABS control can be achieved accordingly. To improve. 이를 위해 본 발명은 차륜의 휠 속도를 검출하는 휠 속도검출부, 휠 속도의 감가속도를 산출하는 휠 감가속도산출부, 휠 감가속도와 미리 설정된 값을 비교하여 휠 가속도의 피크값과 휠 감속도의 피크값을 출력하는 비교출력부, 휠 가속도의 피크값로부터 휠 감속도의 피크값에 도달할 때까지의 시간을 카운트하는 시간카운트부, ABS 제동 초기에 상기 카운트된 시간이 미리 설정된 시간보다 짧고, 상기 피크값의 절대값이 미리 설정된 값보다 모두 크면, 차량이 인 기어상태로 저마찰노면에서 제동중인 것으로 판단하는 제어부를 포함한다. To this end, the present invention is a wheel speed detection unit for detecting the wheel speed of the wheel, the wheel deceleration calculation unit for calculating the deceleration speed of the wheel speed, the wheel deceleration speed and the predetermined value by comparing the peak value of the wheel acceleration and the wheel deceleration A comparison output unit for outputting a peak value, a time counting unit for counting a time from the peak value of the wheel acceleration to the peak value of the wheel deceleration, the counted time at the beginning of ABS braking is shorter than a preset time, If the absolute value of the peak value is all greater than the predetermined value, and includes a control unit for determining that the vehicle is braking on the low friction road surface in the in-gear state.

Model based fault detection method of hydraulic unit of electronic control brake system

A fault detection method based on a model for an electronic brake system is provided to determine a fault of a hydraulic control unit by using a pressure difference between estimated pressure and sensed pressure applied to a hydraulic brake. A fault detection method based on a model for an electronic brake system comprises the steps of: estimating pressure applied to a hydraulic brake(202); and determining a fault(206) using a pressure difference(204) between the estimated pressure applied to a hydraulic brake and sensed pressure applied to the hydraulic brake by a hydraulic brake pressure sensor.

Vehicle and method of controlling the same

본 발명은 차량 및 그 제어 방법에 관한 것으로, 당해 차량의 운전자의 운전 성향 및 전방의 타 차량의 상태에 기초하여 당해 차량의 급제동 및 추월 등을 예측하고, 예측 결과에 기초하여 사륜 구동 제어 및 회생 제동 제어를 수행하여 유압 제동의 개입을 차단 또는 최소화함으로써 차량의 연비를 개선하는데 그 목적이 있다. 이를 위해 본 발명에 따른 차량 제어 방법은, 차량의 제동 상황을 예측하는 단계와; 상기 차량의 미리 정해진 수준의 급제동이 예측되면 상기 차량의 전륜 및 후륜의 제동 분배 제어를 수행하는 단계와; 상기 차량의 미리 정해진 수준의 일반 제동이 예측되면 상기 차량의 후륜 단독 제동 제어를 수행하는 단계를 포함한다.

Braking control method for eco-friendly vehicle

The present invention relates to a braking control method for an eco-friendly vehicle, and the objective of the present invention is to provide a braking control method for an eco-friendly vehicle, capable of aiming enhancement of braking stability and regenerative braking efficiency through optimal front/rear wheel power distribution of an all-wheel drive (AWD) driving system during braking. To this end, a braking control method for an AWD eco-friendly vehicle, to distribute driving power of a vehicle driving source into front and rear wheels in accordance with a controlled power distribution ratio, and to transfer the distributed power comprises: a step of determining total braking force based on a brake signal corresponding to brake operation of a driver; a front/rear braking force distribution step of calculating the front and rear wheel braking forces satisfying the total braking force; a regenerative/frictional braking force distribution step of calculating regenerative and frictional braking forces satisfying the total braking force; a step of using the calculated front and rear wheel, and generative braking forces to determine a power distribution ratio range for the front and rear wheels during braking; a step of determining the power distribution ratio range for the front and rear wheels in accordance with a drive condition of the vehicle within the determined power distribution ratio range; and a step of controlling power distribution for the front and rear wheels at the determined power distribution ratio.

Wheel-side motor driven vehicle anti-lock braking system and method

本发明涉及一种轮边电机驱动车辆刹车防抱死系统及刹车防抱死方法，包括车速传感器、电机控制器、刹车系统、轮边驱动电机及整车控制器，电机控制器、刹车系统及车速传感器分别通过控制线连接整车控制器，电机控制器通过控制线连接轮边驱动电机。本发明是设计一种新的专门适用轮边电机驱动的车辆的防抱死刹车系统，利用轮边驱动电机既能输出驱动力也能输出制动力的特性，当车轮发生抱死现象时，整车控制器控制刹车系统松开刹车片，同时控制轮边驱动电机向车轮输出间歇性制动扭矩，使车轮处于转动状态而又有最大的制动力矩，可提高电动汽车的主动安全性，提升车辆的平顺性。

Method for ensuring maximum brake force in electronic brake force distribution system

본 발명은 운전자의 제동 입력을 검출하는 제동압 검출 센서를 구비하고 차량의 제동시 전륜과 후륜의 제동력을 전자식으로 제어하는 전자식 제동력 분배 시스템에 있어서, 전륜에 고착 경향으로 인하여 ABS 제어가 시작되었을 때 후륜의 압력을 추정하여 그 추정값과 상기 제동압 검출 센서로부터 검출 압력값의 차이가 미리 설정된 최소값 이상이면 후륜의 압력을 다단계적으로 상승시키며, 상기 차이가 상기 최소값 이하이면 후륜의 압력을 연속적으로 상승시켜 후륜에 ABS 제어가 시작될 때까지 압력 상승을 유지시키는 전자식 제동력 분배 시스템에서의 최대 제동력 확보 방법을 제공한다.       The present invention provides an electronic braking force distribution system having a braking pressure detection sensor for detecting a braking input of a driver and electronically controlling braking force of front and rear wheels during braking of the vehicle, when ABS control is started due to a tendency to stick to the front wheels. The pressure of the rear wheel is estimated, and if the difference between the estimated value and the detected pressure value from the braking pressure detection sensor is greater than or equal to a preset minimum value, the pressure of the rear wheel is increased in multiple stages. It provides a method of securing the maximum braking force in the electronic braking force distribution system to maintain the pressure rise until the ABS control on the rear wheel starts. 전자식 제동력 분배 시스템      Electronic Braking Force Distribution System

Method for improved anti-lock braking control for all-wheel drive vehicles having a viscous coupling or a viscous lock

A method for controlling a braking system in an all-wheel drive vehicle having a viscous coupling or a viscous lock, wherein a viscous torque acting on a wheel is estimated, the viscous torque is taken into account in estimating a desired braking pressure for the wheel, and the desired braking pressure is applied to the wheel.

Braking system for a vehicle having hand and foot brake levers

A vehicle has a frame, a straddle seat, front right and left wheels, a rear wheel, a steering assembly, a motor, front right and left brakes, a rear brake, and an electronic brake control unit. The electronic brake control unit has a pump, a valve box, a first pressure sensor disposed in the valve box and an electronic controller. The electronic controller is electronically connected to the pump, and valves of the valve box for controlling their operation. A hand brake lever actuates a first master cylinder and thereby actuates the front brakes through the valve box. A foot brake lever actuates a second master cylinder and thereby actuates the rear brake through the valve box. A second pressure sensor is disposed externally of the valve box. The first and second pressure sensors sensing fluid pressure applied by the first and second master cylinders respectively.

Method for operating a wheel slip control apparatus with compensated wheel speeds

本发明涉及一种用于运行车辆的车轮滑转调节装置的方法，该方法包括确定车辆车轮的在转弯行驶时在车轮转速差方面被补偿的轮速(Vfl_C、Vfr_C、Vrr_C、Vrl_C)作为用于车轮滑转调节装置的输入变量，其中：a)由车辆在转弯行驶期间的行驶行为测定车辆的转向中性的、转向不足的或者转向过度的行驶状态；b)根据车辆的所测定的转向中性的、转向不足的或者转向过度的行驶状态，将参考-横摆角速度(ω z_ref )或者实际-横摆角速度(ω z_meas )用于计算与在车辆上选择的点相关的转弯半径(R ra_ref 或R ra_meas )；c)由与选择的点相关的转弯半径(R ra_ref 或R ra_meas )为车辆的至少几个车轮确定与车轮相关的转弯半径(R rl 、R rr 、R fl 、R fr )；d)由与车轮相关的转弯半径(R rl 、R rr 、R fl 、R fr )和一个共同的参考-转弯半径(R ra )为车辆的所述至少几个车轮确定参考因子(kfl、kfr、krl、krr)，并且e)由参考因子(kfl、kfr、krl、krr)和所测量的轮速(Vrl、Vrr、Vfl、Vfr)为车辆的所述至少几个车轮分别确定补偿的轮速(Vfl_C、Vfr_C、Vrr_C、Vrl_c)，并且f)对于车辆的所述至少几个车轮，将补偿的轮速(Vfl_C、Vfr_C、Vrr_C、Vrl_C)用作用于车轮滑转调节装置的输入变量。

Electronic Four Wheel Drive System for reinforcing Cooperation Control Anti-Lock Brake System and Four Method thereof

In the electronically controlled 4WD system in which the ABS coordination control performance of the present invention is enhanced, the ABS ACT signal of the ABS controller 200 and the 4WD_OPEN signal of the ESC controller 100 are used and the ABS ACT Signal and 4WD_OPEN signal is recognized, the 4WD is released. However, when only the ABS ACT signal is recognized, it is recognized as an ABS vehicle and the driver's will is determined by turning off the brake pedal (ON) (SIDE EFFECT) of the 4WD control logic when traveling on a low friction road (eye or ice road) where the ABS ACT is activated without the brake pedal being operated by releasing the ABS control 200. In particular, By resolving to the sub logic of the 4WD system, there is a characteristic that the driving performance of the ABS SOLO 4WD is degraded and the electronically controlled 4WD system is turned off.

Vehicle having a brake device which transfers a braking torque from rear wheels to the front wheels, with brake slip control

Antiskid control system for four-wheel-drive vehicle

An antiskid control system for a four-wheel-drive vehicle is arranged to calculate a difference between an average of wheel accelerations of front wheels and an average of wheel acceleration of rear wheels. When the difference is greater than or equal to the vibration determination threshold, the antiskid control system determines that a driveline vibration is generated and executes a control for converging the driveline vibration.

用于操作全地形车辆的系统及方法

一种全地形车辆，该全地形车辆可以包括框架以及支承该框架的多个地面接合构件。全地形车辆还可以包括：动力系组件，该动力系组件由框架支承；以及可换挡变速器，该可换挡变速器由框架支承并且以可操作的方式联接至动力系组件。全地形车辆还可以包括由框架支承的显示器、备用相机和控制器。控制器可以配置成接收来自可换挡变速器的信号，该信号对应于可换挡变速器处于多个档位中的除了倒挡以外的档位。此外，控制器可以配置成确定全地形车辆正在向后移动并且向备用相机发送启用信号以将备用相机的图像显示在显示器上。

Sistemas y metodos para la operacion de un vehiculo todo terreno.

Un vehículo todo terreno puede incluir un bastidor y una pluralidad de miembros de contacto con el suelo que soportan el bastidor. El vehículo todo terreno puede incluir además un montaje de tren motriz soportado por el bastidor y una transmisión cambiable soportada por el bastidor y operablemente acoplada al montaje de tren motriz. El vehículo todo terreno también puede incluir una pantalla, una cámara de apoyo y un controlador soportado por el bastidor. El controlador puede estar configurado para recibir una señal de la transmisión cambiable correspondiente a que la transmisión cambiable está en una marcha de la pluralidad de marchas que no es una marcha en reversa. Además, el controlador puede estar configurado para determinar que el vehículo todo terreno se está moviendo hacia atrás y enviar una señal de activación a la cámara de apoyo para mostrar imágenes de la cámara de apoyo en la pantalla.

Systems and methods for operating an all-terrain vehicle

An all-terrain vehicle may include a frame and a plurality of ground-engaging members supporting the frame. The all-terrain vehicle may further include a powertrain assembly supported by the frame and shiftable transmission supported by the frame and operably coupled to the powertrain assembly. The all-terrain vehicle may also include a display, a back-up camera, and a controller supported by the frame. The controller may be configured to receive a signal from the shiftable transmission corresponding to the shiftable transmission being in a gear of the plurality of gears other than a reverse gear. Further, the controller may be configured to determine the all-terrain vehicle is moving backwards and send an activation signal to the back-up camera to display images of the back-up camera on the display.

Four-wheel off-road vehicle having an anti-lock braking system assembly

An off-road vehicle has two front wheels and two rear wheels, the rear wheels being connected to a spool gear driven by a motor. The vehicle also has a left front brake, a right front brake and a single rear brake. Speeds of left and right front wheels are respectively monitored by left and right front speed sensors. A single sensor monitors a common speed of left and right rear wheels. Two user actuated braking input devices, for example a hand lever and a foot lever, may be used independently or concurrently to provide a braking command. An anti-lock braking system may use speed measurements from the various speed sensors to control selective application of pressure on the left front brake, the right front brake and the rear brake.

안티 락 브레이크 시스템의 제어방법

본 발명은 차량이 제동되면, 차량이 감속되어 정지되는 순간 ABS의 브레이크 작용을 설정된 브레이크 릴리즈 시간 동안 일시적으로 해제한 후, 상기 브레이크 릴리즈 시간이 경과되면 상기 ABS가 다시 브레이크 작용을 행함으로써, 제동시 차체 관성력에 생긴 탄성 에너지를 상기 브레이크 릴리즈 시간 동안 휠의 회전에 따른 위치, 운동 에너지로 전환하여 특히 급제동시 쇼크 및 져크 현상을 줄일 수 있는 안티 락 브레이크 시스템(ABS)의 제어방법을 제공한다. 브레이크, 안티 락 브레이크, ABS, SHOCK, JERK

Estimation of vehicle speed in all-wheel-drive vehicle

A vehicle includes an all-wheel-drive powertrain having an electric machine configured to power wheels. A controller is programmed to output a first calculated vehicle speed derived from integrating a measured longitudinal acceleration of the vehicle and output a second calculated vehicle speed based on the measured longitudinal acceleration and a speed of one of the wheels. The controller is further programmed to, responsive to a flag being present, command a speed to the electric machine that is based on the first vehicle speed to reduce wheel slip, and responsive to a flag not being present, command a speed to the electric machine that is based on the second vehicle speed to reduce wheel slip.

控制车辆制动的方法和系统

本发明提供一种控制车辆制动的方法和系统。当隔离器断开连接且辅助驱动轮与驱动系统分离时，在制动期间，由主驱动轮电机的再生制动进行车辆制动。随后，根据车辆稳定性状态使隔离器连接，然后，在辅助驱动轮和主驱动轮上同时执行制动。

車両の制動制御装置

制動制御装置５０は、車輪速度検出値の減少速度を車輪減速度演算値として導出する車輪減速度導出部５２と、各車輪ＦＬ，ＦＲ，ＲＬ，ＲＲの車輪減速度演算値の平均値を車輪減速度平均値として導出する平均値導出部５３と、車輪減速度平均値と前後減速度検出値とを基に、スリップ増大状態が判定時間以上発生しているか否かを判定する判定部５４と、車両制動時にスリップ増大状態が判定時間以上発生しているとの判定がなされたときに、カスケードロックの発生を検知する検知部５５とを備える。

브레이크페달의 답력변화 검출장치 및 그 제어방법

본 발명은 브레이크페달의 답력변화 검출장치 및 그 제어방법에 관한 것으로, 특히 본 발명은 ABS 제어시, 바퀴의 슬립과 차체속도의 기울기 변화에 기초하여 브레이크페달의 답력 변화여부를 정확히 판단함으로써 ABS 제어시 브레이크 페달의 답력변화가 발생하더라도 변화된 브레이크 답력을 반영하여 적절한 ABS 제어를 수행할 수 있으므로 ABS 제동성능을 향상시킬 수 있다. 이를 위해 본 발명은 각 바퀴의 회전속도를 검출하는 복수의 휠 속도센서, 이 복수의 휠 속도센서로부터 산출된 차체속도의 변화율을 산출하는 차체속도변화율산출부, 각 휠 속도에 기초하여 각 바퀴의 슬립을 산출하는 슬립산출부, 이 슬립산출부를 통해 산출된 각 바퀴의 슬립값이 모두 미리 설정된 슬립값보다 낮은 상태를 유지하는 시간을 카운트하는 시간카운트부, ABS 제어시, 차체속도변화율산출부를 통해 산출된 차체속도의 변화율과, 시간카운트부를 통해 카운트된 시간에 기초하여 브레이크 페달의 답력 변화를 판단하는 제어부를 포함한다.

車両の制動制御装置

用于操作全地形车辆的系统及方法

一种全地形车辆，该全地形车辆可以包括框架以及支承该框架的多个地面接合构件。全地形车辆还可以包括：动力系组件，该动力系组件由框架支承；以及可换挡变速器，该可换挡变速器由框架支承并且以可操作的方式联接至动力系组件。全地形车辆还可以包括由框架支承的显示器、备用相机和控制器。控制器可以配置成接收来自可换挡变速器的信号，该信号对应于可换挡变速器处于多个档位中的除了倒挡以外的档位。此外，控制器可以配置成确定全地形车辆正在向后移动并且向备用相机发送启用信号以将备用相机的图像显示在显示器上。

차량의 제동 제어 방법

본 발명은 차량의 제동 제어 방법에 관한 것으로서, 디스커넥터를 해제하여 보조 구동륜을 구동계와 분리한 상태에서 제동시 주 구동륜 모터에 의한 회생제동만으로 차량을 제동하고, 이후 차량 안정성 상태에 따라 디스커넥터를 체결한 뒤 보조 구동륜과 주 구동륜에서의 동시 제동을 실시함으로써, 차량의 안정성 및 제동 성능을 보증하면서도 회생제동량의 극대화를 통해 차량 연비 향상을 달성할 수 있도록 한 차량의 제동 제어 방법이 개시된다.

车辆的制动控制装置

本发明的制动控制装置(50)具备：车轮减速度导出部(52)，导出车轮速度检测值的减少速度作为车轮减速度运算值；平均值导出部(53)，导出各车轮(FL、FR、RL、RR)的车轮减速度运算值的平均值作为车轮减速度平均值；判定部(54)，基于车轮减速度平均值和前后减速度检测值，判定滑移增大状态是否产生了判定时间以上；以及检知部(55)，在车辆制动时判定为滑移增大状态产生了判定时间以上时，检知级联锁止的产生。

控制车辆制动的方法和系统

本发明提供一种控制车辆制动的方法和系统。当隔离器断开连接且辅助驱动轮与驱动系统分离时，在制动期间，由主驱动轮电机的再生制动进行车辆制动。随后，根据车辆稳定性状态使隔离器连接，然后，在辅助驱动轮和主驱动轮上同时执行制动。

Terrain detection and methods of use thereof

In embodiments of the present disclosure, a vehicle for traversing a terrain is provided. The vehicle comprises a plurality of ground engaging members and a frame supported by the plurality of ground engaging members. A plurality of sensors are supported by the plurality of ground engaging members and configured to monitor a plurality of vehicle characteristics. At least one controller is operably coupled to the plurality of sensors, and a brake system is operably coupled to at least one of the plurality of ground engaging members. A steering assembly is operably coupled to at least one of the plurality of ground engaging members, and at least one controller is configured to determine if the terrain is a first terrain type or a second terrain type. Based upon at least one of the plurality of vehicle characteristics and the terrain type, the controller is operable to operate the braking system.

Terrain detection and methods of use thereof

In embodiments of the present disclosure, a vehicle for traversing a terrain is provided. The vehicle comprises a plurality of ground engaging members and a frame supported by the plurality of ground engaging members. A plurality of sensors are supported by the plurality of ground engaging members and configured to monitor a plurality of vehicle characteristics. At least one controller is operably coupled to the plurality of sensors, and a brake system is operably coupled to at least one of the plurality of ground engaging members. A steering assembly is operably coupled to at least one of the plurality of ground engaging members, and at least one controller is configured to determine if the terrain is a first terrain type or a second terrain type. Based upon at least one of the plurality of vehicle characteristics and the terrain type, the controller is operable to operate the braking system.

全轮驱动车辆中对车辆速度的估计

本公开提供了“全轮驱动车辆中对车辆速度的估计”。一种车辆包括电机和控制器。所述控制器被编程为响应于平均车轮速度和基于车轮加速度和测量的车辆加速度之间的差的车辆速度之间的指示车轮打滑的阈值差，而向所述电机命令速度以减少所述车轮打滑。

具有车轮打滑控制和横摆稳定性控制的再生车辆制动

本公开提供了“具有车轮打滑控制和横摆稳定性控制的再生车辆制动”。提供了用于在请求车辆制动时的工况期间操作混合动力车辆的方法和系统。在一个示例中，响应于实际和估计的车辆横摆，将再生制动分配给车轮。另外，响应于请求的制动扭矩和再生制动扭矩，将摩擦制动扭矩分配给车轮。