SYSTEM AND METHOD FOR ENERGY RATE BALANCING IN HYBRID AUTOMATIC TRANSMISSIONS

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input. 137-. (canceled)38. A method , comprising:determining a target drive train output power using the controller, wherein the target drive train output power is determined using a command input and a user preference selectable by a user of the drive train;determining the power source output power using the controller, wherein the target drive train output power is derived from the power source output power; and wherein the controller determines the power source output power using one or more loss parameters and the target drive train output power; andcontrolling a power source output power of a vehicle using a controller, wherein the vehicle has a drive train and a power source, and wherein the controller controls the power source and the drive train;wherein the loss parameters include a kinetic power loss, and wherein the kinetic power loss is calculated as a function of rotational inertia loss parameters within the drive train.39. The method of claim 38 , further comprising:calculating a power loss within the drive train using the controller, the controller calculating the power loss using the one or more loss parameters, andcontrolling the power source output power provided to the drive train using the controller.40. The method of claim 38 , wherein the user preference includes a fuel economy preference.41. The method of claim 38 , wherein the user preference includes an emissions minimization preference.42. The method of claim 38 , wherein the user preference includes an output power maximization preference.43. The method of claim 38 , wherein the user preference includes ...

SYSTEM AND METHOD FOR ENERGY RATE BALANCING IN HYBRID AUTOMATIC TRANSMISSIONS

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input. 137-. (canceled)38. A method , comprising:controlling a power source output power of a vehicle using a controller, wherein the vehicle has a drive train and a power source, and wherein the controller controls the power source and the drive train;determining a target drive train output power using the controller, wherein the target drive train output power is determined using a command input;determining the power source output power using the controller, wherein the target drive train output power is derived from the power source output power; and wherein the controller determines the power source output power using one or more loss parameters and the target drive train output power;wherein the loss parameters include a clutch power loss for a clutch, wherein the drive train has at least one clutch, wherein the clutch has a plurality of clutch plates, and wherein the clutch power loss is calculated as a function of clutch loss parameters.39. The method of claim 38 , further comprising:calculating a power loss within the drive train using the controller, the controller calculating the power loss using the one or more loss parameters, andcontrolling the power source output power provided to the drive train using the controller.40. The method of claim 38 , wherein the clutch loss parameters include a torque transmitted between the plurality of clutch plates during engagement of the clutch.41. The method of claim 38 , wherein the clutch loss parameters include a rotational speed of each clutch plate in the plurality of clutch plates.42. The method of claim 38 , wherein the ...

System and method for power management during regeneration mode in hybrid electric vehicles

A system and method for recovering the optimum power level during regenerative mode is disclosed. Equations for determining the optimum regenerative power level receivable by an energy storage system, for example for any given deceleration event, are derived and disclosed. The equations consider various losses such as the efficiency of the electric motor generator in the generator mode, wind resistance, rolling resistance, transmission losses, engine losses, and losses in the energy storage system. Also disclosed is at least one embodiment of a procedure for controlling a hybrid drive system to achieve the optimum energy recovery.

System and method for optimizing hybrid vehicle battery usage constraints

A hybrid system including a hybrid control module for operating the hybrid system to as to have its energy storage device meet a predetermined service life metric is disclosed. The hybrid control module stores experimental information indicative of the impact of certain usage parameters on the service life of the energy storage device, monitors the actual usage parameters observed during operation of the hybrid system, and dynamically determines a maximum operating temperature for the energy storage device in order to increase or decrease its utilization by the hybrid system.

System and method for optimizing power consumption in a hybrid electric vehicle

A system and method for optimizing the consumption of fuel in a hybrid electric vehicle is disclosed. A Hybrid Efficiency Index (HEI) is used to quantify a relative efficiency advantage achievable with the expenditure of electrical energy at a given power level. Also disclosed is a minimum efficiency threshold useful for determining which HEI values will result in the optimum use of electrical energy throughout the operation of the vehicle. Methods for adjusting the minimum efficiency threshold with respect to regenerative braking events, storage capacity in the energy storage system, along with other aspects are disclosed as well.

System and method for engine driveline disconnect during regeneration in hybrid vehicles

A system and method for operating a hybrid vehicle having an engine and an eMachine coupled by a clutch using a hybrid controller is presented. The method determines an idle fuel rate of the engine, determines a hybrid efficiency index for the hybrid vehicle, determines an expected energy storage rate increase for an operating condition where the engine is decoupled from a vehicle transmission using said clutch, multiplies the expected energy storage rate increase by the hybrid efficiency index to determine an expected fuel rate reduction of the engine in the operating condition; and decouples the engine from the vehicle transmission using the clutch if the expected fuel rate reduction is greater than the idle fuel rate.

System and method for energy rate balancing in hybrid automatic transmissions

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

SYSTEM AND METHOD FOR ENERGY RATE BALANCING IN HYBRID AUTOMATIC TRANSMISSIONS

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input. 137-. (canceled)38. A method , comprising:controlling a power source output power of a vehicle using a controller, wherein the vehicle has a drive train and a power source, and wherein the controller controls the power source and the drive train;determining a target drive train output power using the controller, wherein the target drive train output power is determined using a command input;determining the power source output power using the controller, wherein the target drive train output power is derived from the power source output power; and wherein the controller determines the power source output power using one or more loss parameters and the target drive train output power;wherein the loss parameters include a hydraulic power loss, and wherein the hydraulic power loss is calculated as a function of hydraulic loss parameters calculated using measured properties of hydraulic fluid in the drive train.39. The method of claim 38 , further comprising:calculating a power loss within the drive train using the controller, the controller calculating the power loss using the one or more loss parameters, andcontrolling the power source output power provided to the drive train using the controller.40. The method of claim 38 , wherein the hydraulic loss parameters include a temperature of a hydraulic fluid in the drive train.41. The method of claim 38 , wherein the hydraulic loss parameters include a pressure of the hydraulic fluid in the drive train.42. The method of any one of claim 38 , wherein the hydraulic loss parameters include a flow rate of a hydraulic fluid in the ...

System and method for compensation of turbo lag in hybrid vehicles

A system and method for compensation of turbo lag in hybrid vehicles is disclosed. The system identifies a zero boost power limit of the engine and a torque curve power limit. A turbocharger dynamic model is then developed based on measurements of the input engine power and the output max available engine power. The model is used to determine an overall propulsion power limit based on the combination of the engine and motor in operation. A power request by the driver may then be limited to the overall propulsion power limit to compensate for the effect of the turbocharger when propelling the vehicle using both the engine and motor and better simulate the engine-only response.

SYSTEM AND METHOD FOR HILL CLIMBING GEAR SELECTION

A multi-speed automatic transmission having a control circuit for managing a hill climb event is provided. The control circuit may detect the hill climb event, such as by identifying when an upshift from a climb gear to an upshift gear would cause deceleration on a hill. The control circuit may also respond to the hill climb event based on desired performance characteristics, including fuel economy, speed, acceleration, and other performance characteristics. In one embodiment, the control circuit responds to the hill climb event by cycling the multi-speed automatic transmission between the climb gear and the upshift gear. 1. A vehicular system configured to climb a hill , the system comprising:a multi-speed automatic transmission including an input member and an output member operatively coupled to the input member, the multi-speed automatic transmission being configurable in a plurality of forward speed ratios between the input member and the output member, the plurality of forward speed ratios including at least a first forward speed ratio and a second forward speed ratio; anda control circuit operatively coupled to the multi-speed automatic transmission, the control circuit configuring the multi-speed automatic transmission to establish each of the plurality of forward speed ratios, and the control circuit identifying a hill climb event when an upshift from the first forward speed ratio to the second forward speed ratio at a first engine speed would decelerate the vehicular system on the hill from a first vehicle speed, wherein at the first engine speed the first forward speed ratio is capable of maintaining the first vehicle speed up the hill.2. The system of claim 1 , wherein the control circuit determines a required engine load power to maintain the first vehicle speed up the hill.3. The system of claim 2 , wherein the control circuit determines:a maximum engine power in the first forward speed ratio corresponding to the required engine load power and a ...

SYSTEM AND METHOD FOR POWER MANAGEMENT DURING REGENERATION MODE IN HYBRID ELECTRIC VEHICLES

A system and method for recovering the optimum power level during regenerative mode is disclosed. Equations for determining the optimum regenerative power level receivable by an energy storage system, for example for any given deceleration event, are derived and disclosed. The equations consider various losses such as the efficiency of the electric motor generator in the generator mode, wind resistance, rolling resistance, transmission losses, engine losses, and losses in the energy storage system. Also disclosed is at least one embodiment of a procedure for controlling a hybrid drive system to achieve the optimum energy recovery. 1. A method of controlling regenerative braking in a hybrid electric vehicle , comprising:calculating a predicted vehicle energy loss for a vehicle using a vehicle controller, wherein the vehicle has an electric motor generator and an energy storage system, and wherein the electric motor generator is electrically connected to the energy storage system;calculating an expected electric motor operating efficiency using the vehicle controller;calculating a predicted electrical power to supply to the energy storage system using the vehicle controller and the predicted vehicle energy loss; andgenerating a regenerative braking power using the electric motor generator operating as a generator, wherein the regenerative braking power is less than or equal to the predicted electrical power to supply to the energy storage system.2. The method of claim 1 , further comprising detecting a deceleration state of the vehicle.3. (canceled)4. The method of claim 2 , wherein the act of detecting a deceleration state includes detecting a torque provided from a transmission to the electric motor generator claim 2 , wherein the electric motor generator is coupled to the transmission.5. The method of claim 1 , wherein the predicted vehicle energy loss includes losses caused by an expected change in vehicle kinetic energy.6. The method of claim 1 , wherein the ...

SYSTEM AND METHOD FOR DETECTING VEHICLE CLUTCH TOUCH POINT

A hybrid system and method is configured to achieve and maintain a touch point for a clutch so as to allow an engine to rapidly restart. The hybrid system includes an eMachine configured to start the engine. The clutch is configured to operatively connect and disconnect the eMachine and the engine. A motor torque PID controller is configured to operate the eMachine at a desired speed by regulating torque of the eMachine. A clutch pressure PID controller is configured to actuate the clutch to a touch point by regulating clutch pressure. The motor torque PID controller and the clutch pressure PID controller include a compensation function to account for a change in torque caused by actuation of the clutch by the clutch pressure PID controller. 1. A method , comprising:controlling speed of an eMachine in a hybrid system to a desired speed with a motor torque PID controller that regulates torque of the eMachine;actuating a clutch to a touch point by regulating clutch pressure with a clutch pressure PID controller; andadjusting the desired speed for the motor torque PID controller by a compensation function to account for a change in torque caused by said actuating the clutch.2. The method of claim 1 , further comprising:issuing a command to open the clutch;stabilizing the speed of the eMachine by said controlling the speed of the eMachine after said issuing;confirming the clutch is open;achieving additional motor speed droop by said adjusting; andmaintaining the clutch at the touch point with the clutch pressure PID controller.3. The method of claim 1 , further comprising:closing the clutch after said actuating the clutch; andrestarting an engine with the eMachine after said closing the clutch.5. The method of claim 1 , wherein the motor torque PID controller incorporates an error function in accordance with the following equation:{'br': None, 'i': e', 'n', 'X', '−K', 'y', '−X, 'sub': ref', 'droop', 'i, '()='}where:e=error;{'sub': 'ref', 'X=eMachine desired speed;'}X= ...

SYSTEM AND METHOD FOR ENERGY RATE BALANCING IN HYBRID AUTOMATIC TRANSMISSIONS

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input. 137-. (canceled)38. A method , comprising:controlling a power source output power of a vehicle using a controller, wherein the vehicle has a drive train and a power source, and wherein the controller controls the power source and the drive train;determining a target drive train output power using the controller, wherein the target drive train output power is determined using a command input;determining the power source output power using the controller, wherein the target drive train output power is derived from the power source output power; and wherein the controller determines the power source output power using one or more loss parameters and the target drive train output power;wherein the loss parameters include a hydraulic power loss, and wherein the hydraulic power loss is calculated as a function of hydraulic loss parameters calculated using measured properties of hydraulic fluid in the drive train.39. The method of claim 38 , further comprising:calculating a power loss within the drive train using the controller, the controller calculating the power loss using the one or more loss parameters, andcontrolling the power source output power provided to the drive train using the controller.40. The method of claim 38 , wherein the hydraulic loss parameters include a temperature of a hydraulic fluid in the drive train.41. The method of claim 38 , wherein the hydraulic loss parameters include a pressure of the hydraulic fluid in the drive train.42. The method of any one of claim 38 , wherein the hydraulic loss parameters include a flow rate of a hydraulic fluid in the ...

SYSTEM AND METHOD FOR COMPENSATION OF TURBO LAG IN HYBRID VEHICLES

A system and method for compensation of turbo lag in hybrid vehicles is disclosed. The system identifies a zero boost power limit of the engine and a torque curve power limit. A turbocharger dynamic model is then developed based on measurements of the input engine power and the output max available engine power. The model is used to determine an overall propulsion power limit based on the combination of the engine and motor in operation. A power request by the driver may then be limited to the overall propulsion power limit to compensate for the effect of the turbocharger when propelling the vehicle using both the engine and motor and better simulate the engine-only response.

SYSTEM AND METHOD FOR ENERGY RATE BALANCING IN HYBRID AUTOMATIC TRANSMISSIONS

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input. 137-. (canceled)38. A method , comprising:using a controller to select a power profile for a drivetrain of a vehicle that includes an engine and an electric motor selectively coupled to a transmission, the power profile defining predetermined power levels to be delivered by the drivetrain over time;determining an output power of the engine and transmission using the controller; wherein the controller determines the output power of the engine and the transmission using one or more loss parameters; andcontrolling the engine and the electric motor to provide an input power level to the transmission that results in an output power of the drivetrain that matches the power profile;wherein the loss parameters include power losses caused by rotational inertia of at least one body within the drivetrain.39. The method of claim 38 , comprising:reducing power output from the engine and the electric motor using the controller when the controller determines the transmission is shifting gear ratios.40. The method of claim 38 , comprising:reducing power output from the engine and the electric motor using the controller when the controller determines the transmission is decoupled from the drivetrain.41. The method of claim 38 , comprising:accepting a command input from a user using the controller, wherein the controller uses the command input to select the power profile.42. The method of claim 41 , wherein the user command input includes actuation of an accelerator or a brake.43. The method of claim 38 , further comprising:calculating an overall power loss for the engine, electric motor, ...

SYSTEM AND METHOD FOR ENGINE DRIVELINE DISCONNECT DURING REGENERATION IN HYBRID VEHICLES

A system and method for operating a hybrid vehicle having an engine and an eMachine coupled by a clutch using a hybrid controller is presented. The method determines an idle fuel rate of the engine, determines a hybrid efficiency index for the hybrid vehicle, determines an expected energy storage rate increase for an operating condition where the engine is decoupled from a vehicle transmission using said clutch, multiplies the expected energy storage rate increase by the hybrid efficiency index to determine an expected fuel rate reduction of the engine in the operating condition; and decouples the engine from the vehicle transmission using the clutch if the expected fuel rate reduction is greater than the idle fuel rate. 128-. (canceled)29. A method for operating a hybrid vehicle having an eMachine and an engine using a hybrid controller , comprising:determining an engine-only fuel value representing fuel required to propel the hybrid vehicle in a first mode using the engine alone;determining a hybrid fuel value representing fuel required to propel the hybrid vehicle in a second mode using the eMachine as a motor along with the engine to propel the hybrid vehicle;determining a fuel saved value by subtracting the hybrid fuel value from the engine-only fuel value;determining a hybrid electrical energy value representing electrical energy used to propel the hybrid vehicle in the second mode;calculating a Hybrid Efficiency Index (HEI) by determining a ratio of the fuel saved value to the hybrid electrical energy value; andusing the HEI to control a clutch between the engine and a transmission to decouple the engine from the transmission during a throttle lift condition.30. The method of claim 29 , comprising:determining a first energy storage rate for an energy storage system coupled to the eMachine, wherein the first energy storage rate is determined when the engine is disconnected from the transmission;determining a second energy storage rate for the energy storage ...

System and method for optimizing hybrid vehicle battery usage constraints

A hybrid system including a hybrid control module for operating the hybrid system to as to have its energy storage device meet a predetermined service life metric is disclosed. The hybrid control module stores experimental information indicative of the impact of certain usage parameters on the service life of the energy storage device, monitors the actual usage parameters observed during operation of the hybrid system, and dynamically determines a maximum operating temperature for the energy storage device in order to increase or decrease its utilization by the hybrid system.

SYSTEM AND METHOD FOR COMPENSATION OF TURBO LAG IN HYBRID VEHICLES

A system and method for compensation of turbo lag in hybrid vehicles is disclosed. The system identifies a zero boost power limit of the engine and a torque curve power limit. A turbocharger dynamic model is then developed based on measurements of the input engine power and the output max available engine power. The model is used to determine an overall propulsion power limit based on the combination of the engine and motor in operation. A power request by the driver may then be limited to the overall propulsion power limit to compensate for the effect of the turbocharger when propelling the vehicle using both the engine and motor and better simulate the engine-only response. 1. A method of operating a hybrid vehicle using a hybrid controller , comprising:determining a zero boost power limit of an engine of the hybrid vehicle, said engine including a turbocharger;determining a torque curve power limit of the engine, said torque curve power limit based upon the maximum available power when the turbocharger is operating;monitoring a current power of the engine and a current maximum available power of the engine when the current maximum available power is between the zero boost power limit and the torque curve power limit; anddetermining a dynamic response model of the engine based on said monitoring, said model providing an estimation of the engine output power over time as the turbocharger substantially contributes to the output power of the engine.2. The method of claim 1 , further comprising:receiving a driver output torque request; andoperating the hybrid vehicle such that the collective output power of the engine and an eMachine of the hybrid vehicle is automatically limited to a turbo-equivalent power limit based on said model, said turbo-equivalent power limit representing the power limit of the engine acting alone.3. The method of claim 2 , further comprising:determining an actual engine torque of the engine;multiplying said actual engine torque by a current ...

System and method for power management during regeneration mode in hybrid-electric vehicles for h-3000

A system and method for recovering the optimum power level during regenerative mode is disclosed. Equations for determining the optimum regenerative power level receivable by an energy storage system, for example for any given deceleration event, are derived and disclosed. The equations consider various losses such as the efficiency of the electric motor generator in the generator mode, wind resistance, rolling resistance, transmission losses, engine losses, and losses in the energy storage system. Also disclosed is at least one embodiment of a procedure for controlling a hybrid drive system to achieve the optimum energy recovery.

SYSTEM AND METHOD FOR OPTIMIZING POWER CONSUMPTION IN A HYBRID ELECTRIC VEHICLE

A system and method for optimizing the consumption of fuel in a hybrid electric vehicle is disclosed. A Hybrid Efficiency Index (HEI) is used to quantify a relative efficiency advantage achievable with the expenditure of electrical energy at a given power level. Also disclosed is a minimum efficiency threshold useful for determining which HEI values will result in the optimum use of electrical energy throughout the operation of the vehicle. Methods for adjusting the minimum efficiency threshold with respect to regenerative braking events, storage capacity in the energy storage system, along with other aspects are disclosed as well. 1. A method of controlling a hybrid system , comprising:calculating a fuel consumption rate for an engine using a controller in communication with the engine, the engine configured to consume a fuel to produce an engine output torque;calculating a target electric motor output torque using the controller, the target electric motor output torque calculated by the controller using a predicted change in a fuel consumption rate and a predicted change in a stored electrical energy caused by a predicted consumption of the stored electrical energy by an electric motor generator;controlling the electric motor generator to produce an actual electric motor output torque that is substantially equal to the target electric motor output torque using the controller; andcontrolling the engine to reduce the engine output torque by an amount corresponding to the target electric motor output torque using the controller.2. The method of claim 1 , wherein the predicted change in the stored electrical energy is a difference between a stored energy reduction and a minimum stored energy reduction.3. The method of claim 1 , wherein the predicted change in the fuel consumption is a difference between the fuel consumption rate and a minimum evaluation fuel consumption rate.4. The method of claim 1 , wherein the act of calculating the target electric motor output ...

SYSTEM AND METHOD FOR ENGINE DRIVELINE DISCONNECT DURING REGENERATION IN HYBRID VEHICLES

A system and method for operating a hybrid vehicle having an engine and an eMachine coupled by a clutch using a hybrid controller is presented. The method determines an idle fuel rate of the engine, determines a hybrid efficiency index for the hybrid vehicle, determines an expected energy storage rate increase for an operating condition where the engine is decoupled from a vehicle transmission using said clutch, multiplies the expected energy storage rate increase by the hybrid efficiency index to determine an expected fuel rate reduction of the engine in the operating condition; and decouples the engine from the vehicle transmission using the clutch if the expected fuel rate reduction is greater than the idle fuel rate. 1. A method for operating a hybrid vehicle having an eMachine and an engine using a hybrid controller , comprising:determining an expected fuel rate reduction of the engine at a first time between a first operating condition occurring when the engine is coupled to a vehicle transmission by a clutch, and a second operating condition occurring when the engine is decoupled from the vehicle transmission by the clutch; anddecoupling the engine from the vehicle transmission from the first operating condition to the second operating condition using the clutch at a second time after the first time if the expected fuel rate reduction is greater than an idle fuel rate of the engine.2. The method of claim 1 , wherein said determining said determining expected fuel rate reduction comprises:determining an expected energy storage rate increase due to a transition from the first to the second operating condition; andmultiplying said expected energy storage rate increase by a hybrid efficiency index.4. The method of claim 3 , wherein the hybrid controller adaptively determines said hybrid efficiency index over the time period T.5. The method of claim 1 , wherein the idle fuel rate is determined by the hybrid controller by monitoring the amount of fuel being ...

System and method for detecting vehicle clutch touch point

A hybrid system and method is configured to achieve and maintain a touch point for a clutch so as to allow an engine to rapidly restart. The hybrid system includes an eMachine configured to start the engine. The clutch is configured to operatively connect and disconnect the eMachine and the engine. A motor torque PID controller is configured to operate the eMachine at a desired speed by regulating torque of the eMachine. A clutch pressure PID controller is configured to actuate the clutch to a touch point by regulating clutch pressure. The motor torque PID controller and the clutch pressure PID controller include a compensation function to account for a change in torque caused by actuation of the clutch by the clutch pressure PID controller.

System and method for engine driveline disconnect during regeneration in hybrid vehicles

A system and method for operating a hybrid vehicle having an engine and an eMachine coupled by a clutch using a hybrid controller is presented. The method determines an idle fuel rate of the engine, determines a hybrid efficiency index for the hybrid vehicle, determines an expected energy storage rate increase for an operating condition where the engine is decoupled from a vehicle transmission using said clutch, multiplies the expected energy storage rate increase by the hybrid efficiency index to determine an expected fuel rate reduction of the engine in the operating condition; and decouples the engine from the vehicle transmission using the clutch if the expected fuel rate reduction is greater than the idle fuel rate.

System and method for energy rate balancing in hybrid automatic transmissions

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

System and method for optimizing hybrid vehicle battery usage constraints

A hybrid system including a hybrid control module for operating the hybrid system to as to have its energy storage device meet a predetermined service life metric is disclosed. The hybrid control module stores experimental information indicative of the impact of certain usage parameters on the service life of the energy storage device, monitors the actual usage parameters observed during operation of the hybrid system, and dynamically determines a maximum operating temperature for the energy storage device in order to increase or decrease its utilization by the hybrid system.

System and method for detecting vehicle clutch touch point

System and method for compensation of turbo lag in hybrid vehicles

A system and method for compensation of turbo lag in hybrid vehicles is disclosed. The system identifies a zero boost power limit of the engine and a torque curve power limit. A turbocharger dynamic model is then developed based on measurements of the input engine power and the output max available engine power. The model is used to determine an overall propulsion power limit based on the combination of the engine and motor in operation. A power request by the driver may then be limited to the overall propulsion power limit to compensate for the effect of the turbocharger when propelling the vehicle using both the engine and motor and better simulate the engine-only response.

Method and apparatus to monitor position of a rotatable shaft

A rotatable shaft is equipped with a measurement device that generates output signals corresponding to discrete angular positions of the shaft. Rotational angles of the shaft are measured for a complete rotational period. A true angular velocity of the shaft is determined. Angular velocity is calculated between contiguous pairs of the discrete angular positions. A velocity correction is determined, and a rotational angle error term is determined based upon the velocity correction.

System and method for hill climbing gear selection

A multi-speed automatic transmission (104) having a control circuit (200) for managing a hill climb event (518) is provided. The control circuit (200) may detect the hill climb event (518), such as by identifying when an upshift from a climb gear (2501) to an upshift gear (2502) would cause deceleration on a hill. The control circuit (200) may also respond to the hill climb event (518) based on desired performance characteristics, including fuel economy, speed, acceleration, and other performance characteristics. In one embodiment, the control circuit (200) responds to the hill climb event (518) by cycling the multi-speed automatic transmission (104) between the climb gear (2501) and the upshift gear (2502).

System and method for energy rate balancing in hybrid automatic transmissions

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

Method and apparatus for electric motor torque monitoring

Methods and apparatus are provided for monitoring an achieved motor torque produced by an electric motor. The method includes determining the achieved motor torque based on a rotor position of the electric motor and a phase current of the electric motor when the motor speed is not greater than a first pre-determined threshold, determining the achieved motor torque based on a loss-compensated power supplied to the electric motor when the motor speed is greater than the first pre-determined threshold, comparing the achieved motor torque with the torque command, and indicating a fault when the achieved motor torque is not within a pre-determined margin of the torque command.

System and method for compensation of turbo lag in hybrid vehicles

A system and method for compensation of turbo lag in hybrid vehicles is disclosed. The system identifies a zero boost power limit of the engine and a torque curve power limit. A turbocharger dynamic model is then developed based on measurements of the input engine power and the output max available engine power. The model is used to determine an overall propulsion power limit based on the combination of the engine and motor in operation. A power request by the driver may then be limited to the overall propulsion power limit to compensate for the effect of the turbocharger when propelling the vehicle using both the engine and motor and better simulate the engine-only response.

System and method for energy rate balancing in hybrid automatic transmissions

A hybrid system includes a transmission control module, a power source, a transmission, and a drive train. The transmission control module partially operates the hybrid system and receives operating information from various components of the system, calculates power losses in the drive train, and calculates the driving torque needed to reach a target power profile determined from a driver's input.

Method and apparatus for detecting an insufficient phase current in a permanent magnet synchronous motor

A method is provided for detecting an insufficient or missing phase current in a permanent magnet synchronous motor, and includes determining a composite vector position of a combined three-phase phase current with respect to a stationary portion of the motor, and assigning a sector to the position. The method includes comparing the phase current to a calibrated threshold current corresponding to the sector, and executing a response when the absolute value is less than the threshold. A vehicle includes an energy storage device (ESD), a motor/generator configured as a permanent magnet synchronous motor, a voltage inverter, and a bus for conducting DC current from the ESD to the inverter. A controller detects an insufficient phase current, determines a current vector position of the three-phase AC, assigns a sector to the position, and executes a response when an absolute value of the phase current is less than a calibrated threshold.

Detecting program flow fault in torque security software for hybrid vehicle electric drive system

A diagnostic system for a hybrid vehicle comprises a processor module and a motor control module. The processor module outputs a seed value. The motor control module controls torque output by an electric motor of the hybrid vehicle, receives the seed value, generates a final key value based on the seed value, and outputs the final key value to the processor module.

System and method for power management during regeneration mode in hybrid electric vehicles

A system and method for recovering the optimum power level during regenerative mode is disclosed. Equations for determining the optimum regenerative power level receivable by an energy storage system, for example for any given deceleration event, are derived and disclosed. The equations consider various losses such as the efficiency of the electric motor generator in the generator mode, wind resistance, rolling resistance, transmission losses, engine losses, and losses in the energy storage system. Also disclosed is at least one embodiment of a procedure for controlling a hybrid drive system to achieve the optimum energy recovery.

Method and apparatus to monitor a temperature sensing device

A method and an article of manufacture are provided to monitor a temperature sensing circuit and detect a fault therein. The method comprises monitoring sensor readings output from a plurality of temperature sensing circuits. An average sensor reading is determined, calculated from the sensor readings output from a subset of the temperature sensing circuits. Each of the sensor readings is compared to the average sensor reading. A fault is identified when one of the sensor readings deviates from the average sensor reading by an amount greater than a threshold, more particularly when one of the sensor readings deviates from the average sensor reading by an amount greater than the threshold at least a quantity of X times out of Y sensor readings.

System and method for optimizing power consumption in a hybrid electric vehicle

A system and method for optimizing the consumption of fuel in a hybrid electric vehicle is disclosed. A Hybrid Efficiency Index (HEI) is used to quantify a relative efficiency advantage achievable with the expenditure of electrical energy at a given power level. Also disclosed is a minimum efficiency threshold useful for determining which HEI values will result in the optimum use of electrical energy throughout the operation of the vehicle. Methods for adjusting the minimum efficiency threshold with respect to regenerative braking events, storage capacity in the energy storage system, along with other aspects are disclosed as well.

Method to manage a high voltage system in a hybrid powertrain system

A powertrain includes an electromechanical transmission operative to transmit torque between an input member and an electric machine and an output member to transmit tractive torque. The electric machine is electrically connected to an inverter device which is electrically connected to an energy storage device. A method for operating the powertrain includes detecting a shutdown event, commanding the transmission to neutral, commanding the electric machine to cease operating in a torque generating mode, and electrically disconnecting the energy storage device from the inverter device.

Detecting a program execution error in a torque security software for an electric drive system of a hybrid vehicle

Ein Diagnosesystem für ein Hybridfahrzeug umfasst ein Prozessormodul und ein Motorsteuermodul. Das Prozessormodul gibt einen Saatwert aus. Das Motorsteuermodul steuert ein Drehmoment, das von einem Elektromotor des Hybridfahrzeugs abgegeben wird, empfängt den Saatwert, erzeugt einen endgültigen Schlüsselwert basierend auf dem Saatwert und gibt den endgültigen Schlüsselwert an das Prozessormodul aus. A diagnostic system for a hybrid vehicle includes a processor module and an engine control module. The processor module outputs a seed value. The engine control module controls a torque output from an electric motor of the hybrid vehicle, receives the seed, generates a final key value based on the seed, and outputs the final key value to the processor module.

System and method for engine driveline disconnect during regeneration in hybrid vehicles

A system and method for operating a hybrid vehicle having an engine and an eMachine coupled by a clutch using a hybrid controller is presented. The method determines an idle fuel rate of the engine, determines a hybrid efficiency index for the hybrid vehicle, determines an expected energy storage rate increase for an operating condition where the engine is decoupled from a vehicle transmission using said clutch, multiplies the expected energy storage rate increase by the hybrid efficiency index to determine an expected fuel rate reduction of the engine in the operating condition; and decouples the engine from the vehicle transmission using the clutch if the expected fuel rate reduction is greater than the idle fuel rate.

Prozessorsicherheitsdiagnose für Hybridfahrzeug-Elektromotor-Steuersystem

Ein Diagnosesystem für ein Hybridfahrzeug umfasst ein Prozessormodul und ein Motorsteuermodul. Das Prozessormodul gibt einen ersten Startwert aus. Das Motorsteuermodul steuert die Drehmomentabgabe von einem Elektromotor des Hybridfahrzeugs und gibt auf der Grundlage des ersten Startwerts einen Schlüsselwert aus. Das Prozessormodul gibt nach dem Empfang des Schlüsselwerts einen zweiten Startwert aus und das Motorsteuermodul diagnostiziert auf der Grundlage eines Vergleichs des zweiten Startwerts mit dem ersten Startwert selektiv eine Störung in dem Prozessormodul.

Verhaltenstest für Abschaltpfad für einen Permanentmagnet-AC-Motor in einem Hybridantriebsstrang

Ein Diagnosesystem für ein Hybridfahrzeug umfasst ein Motorsteuerungsmodul und ein Fehlerdiagnosemodul. Das Motorsteuerungsmodul steuert einen Drehmomentabtrieb eines Elektromotors, der eine vorbestimmte Anzahl von Phasen aufweist. Das Fehlerdiagnosemodul ermittelt eine Position eines Rotors des Elektromotors, richtet den Rotor nach einem Phasenwinkel einer der Phasen aus, diagnostiziert auf der Grundlage eines Stroms mindestens einer der Phasen selektiv einen Fehler und deaktiviert den Elektromotor selektiv auf der Grundlage der Diagnose.

Temperaturschutz eines Elektroantriebssystems

Die Temperatur eines Elektroantriebs wird geregelt, um ungewünschte Temperatureffekte zu verhindern. Temperaturzustände des Elektroantriebssystems werden überwacht und ein Drehmoment des Elektroantriebssystems wird auf der Grundlage der Temperaturzustände begrenzt.

PWM-Sequenzmuster zur Verringerung von Verlusten bei Spannungszwischenkreisumrichtern

Ein Verfahren zur Steuerung eines Umrichters verwendet Sequenzen vorbestimmter Zustände, wobei jeder Zustand eindeutig einem Steuerungssignalsatz entspricht, mit dem der Umrichter versorgt wird, der mit einem Motor gekoppelt ist. Das Verfahren umfasst ein wiederholtes Anwenden einer ersten Mitte-Null-Zeitsequenz der Zustände, während eine Nulldurchgangsbedingung überwacht wird, und dann ein Wechseln von der wiederholten Anwendung der ersten Mitte-Null-Zeitsequenz der Zustände zu einer wiederholten Anwendung einer zweiten Mitte-Null-Zeitsequenz von Zuständen, wenn die Überwachung eine Nulldurchgangsbedingung detektiert. Die wiederholte Anwendung der ersten Mitte-Null-Zeitsequenz versorgt den Umrichter sequenziell mit einer ersten vorbestimmten Sequenz von Steuerungssignalsätzen. Das Überwachen einer Nulldurchgangsbedingung überwacht eine Nulldurchgangsbedingung bei einem elektrischen Strom, der zwischen dem Umrichter und einem Anschluss des Motors fließt. Die zweite Mitte-Null-Zeitsequenz definiert eine zweite vorbestimmte Sequenz von Steuerungssignalsätzen.

Phase current sampling and regulating apparatus and methods, and electric motor drive systems

In various embodiments, a phase current sampling apparatus ( 300, 600 , FIGS. 3, 6 ), an electric motor drive system ( 100 , FIG. 1 ), and a motor vehicle ( 1200 , FIG. 12 ) include switching circuitry adapted to receive first and second phase current waveforms. The switching circuitry provides the first phase current waveform during at least two offset sampling instants, and provides the second phase current waveform during a reference sampling instant. An analog-to-digital converter is adapted to sample the first phase current waveform at the offset sampling instants, and to sample the second phase current waveform at the reference sampling instant. An embodiment of a method for regulating phase current waveforms includes an analog-to-digital converter generating samples of a first phase current waveform at sampling instants that occur before and after a reference sampling instant, and generating a sample of a second phase current waveform at the reference sampling instant.

System and method for compensation of turbo lag in hybrid vehicles

A system and method for compensation of turbo lag in hybrid vehicles is disclosed. The system identifies a zero boost power limit of the engine and a torque curve power limit. A turbocharger dynamic model is then developed based on measurements of the input engine power and the output max available engine power. The model is used to determine an overall propulsion power limit based on the combination of the engine and motor in operation. A power request by the driver may then be limited to the overall propulsion power limit to compensate for the effect of the turbocharger when propelling the vehicle using both the engine and motor and better simulate the engine-only response.