Valve manifold

A valve is provided including a first valve member and a second valve member. The first valve member includes a first step and a first orifice adjacent the first step. The second valve member includes a second step and a second orifice adjacent the second step. The second valve member is movable relative to the first valve member between an open position, in which the first orifice is fluidly connected the second orifice, and a closed position, in which the first orifice is substantially fluidly disconnected from the second orifice. The first and second steps are fluidly connected to the second orifice and substantially fluidly disconnected from the first orifice when the second valve member is in the closed position, and the first and second steps are fluidly connected to the first and second orifices when the second valve member is in the open position.

VALVE MANIFOLD

A valve is provided including a first valve member and a second valve member. The first valve member includes a first step and a first orifice adjacent the first step. The second valve member includes a second step and a second orifice adjacent the second step. The second valve member is movable relative to the first valve member between an open position, in which the first orifice is fluidly connected the second orifice, and a closed position, in which the first orifice is substantially fluidly disconnected from the second orifice. The first and second steps are fluidly connected to the second orifice and substantially fluidly disconnected from the first orifice when the second valve member is in the closed position, and the first and second steps are fluidly connected to the first and second orifices when the second valve member is in the open position. 120-. (canceled)21. A valve manifold , comprising:a first valve including a first valve member and a second valve member movable relative to the first valve member between a first position and a second position;a second valve fluidly connected to the first valve, the second valve selectively communicating pressurized fluid to the first valve to urge the second valve member between the first position and the second position;a fluid passage fluidly connecting the first valve member of the first valve to the second valve; anda check valve disposed in the delivery valve manifold for controlling an amount of fluid delivered to the second valve.22. The valve manifold of claim 21 , wherein the check valve substantially prevents fluid flowing from the delivery valve manifold to the first valve member of the first valve.23. The valve manifold of claim 21 , wherein the check valve is a ball check valve that selectively engages an inlet passage of the delivery valve manifold.24. The valve manifold as recited in further comprising a filter fluidly connected to the delivery valve manifold.25. The valve manifold as recited in ...

HYDRAULIC SYSTEM INCLUDING PRIORITY BASED VALVE SEQUENCING

An exemplary hydraulic system includes a plurality of digital valves, each valve fluidly connectable to a corresponding hydraulic load. The digitals valves are operable to fluidly connect the corresponding hydraulic load to a pressure source. The hydraulic system further includes a digital controller operably connected to the plurality of digital valves. The digital controller is configured to assign a priority level so that it is associated with each of a plurality of hydraulic loads, and to formulate a pulse width modulated control signal based on the assigned priority levels. The digital controller transmits the control signal to the plurality of digital valves for controlling the operation of the valves. 134.-. (canceled)35. A method comprising:assigning a priority level so that it is associated with each of a plurality of hydraulic loads;formulating a pulse width modulated control signal based on the assigned priority levels;transmitting the control signal to a plurality of digital valves, each valve operable to selectively fluidly connect at least one of the hydraulic loads to a pressure source;sequentially actuating at least a subset of the digital valves in response to the control signal;actuating the valves in sequential order based on the assigned priority level of the associated hydraulic load;basing each assigned priority level on at least one of a pressure requirement and a flow requirement of the specific hydraulic load; andsequentially actuating the valves commencing with the valve associated with the hydraulic load having one of the highest pressure requirement and the lowest pressure requirement, and proceeding in sequential descending or ascending order, respectively, based on the pressure requirements of the remaining hydraulic loads. This application claims the benefit of U.S. Provisional Application 61/044,337 filed on Apr. 11, 2008 and PCT application PCT/US09/40219 filed on Apr. 10, 2009.A hydraulic system may include multiple hydraulic loads, ...

GEAR AXIAL THRUST FORCE OPTIMIZATION FOR HIGH EFFICIENCY VEHICLE TRANSMISSION

A transmission selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes an input shaft, a mainshaft, an output shaft, a first countershaft and a second countershaft. A first gear set includes a first mainshaft gear arranged on the mainshaft, a first countershaft gear arranged on the first countershaft and a first countershaft gear arranged on the second countershaft. A second gear set includes a second mainshaft gear arranged on the mainshaft, a first countershaft gear arranged on the second countershaft and a second countershaft gear arranged on the second countershaft. The gears of the first gear set all have a first helix angle. The gears of the second gear set all have a second helix angle. The first and second helix angles are selected to provide gear constant leading whereby thrust forces directed onto the first and second countershafts are balanced. 1. A transmission selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle , the transmission system comprising:an input shaft, a mainshaft, an output shaft, a first countershaft and a second countershaft, the first and second countershafts being offset from the mainshaft and drivably connected to the input shaft and the mainshaft;a first gear set having a first mainshaft gear arranged on the mainshaft, a first countershaft gear arranged on the first countershaft and a first countershaft gear arranged on the second countershaft, wherein the gears of the first gear set are meshingly engaged;a second gear set having a second mainshaft gear arranged on the mainshaft, a second countershaft gear arranged on the first countershaft and a second countershaft gear arranged on the second countershaft, wherein the gears of the second gear set are meshingly engaged; andwherein the gears of the first gear set all have a first helix angle and the gears of the second gear set all have a second helix angle, wherein the first and second ...

TRANSMISSION SYSTEM FOR COMMERCIAL VEHICLE POWERTRAIN ELECTRIFICATION

A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes a transmission, a motor generator, a master clutch and a controller. The transmission includes an input shaft, a mainshaft, an output shaft and a countershaft offset from the input shaft. The countershaft is drivably connected to the first input shaft and the mainshaft. The motor generator is selectively coupled to the countershaft. The master clutch includes a driving portion connected to the engine crankshaft and a driven portion coupled to the transmission input shaft and adapted to frictionally engage the driving portion between open and closed positions. The controller selectively operates the transmission system in a first operating mode that includes defueling the engine while the vehicle is moving based on vehicle operating conditions and routes rotational energy from the output shaft, through the countershaft and into the motor generator. 1. A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle , the transmission system comprising:a transmission having an input shaft, a mainshaft, an output shaft and a countershaft offset from the input shaft, the countershaft drivably connected to the first input shaft and the mainshaft;a motor generator selectively coupled to the countershaft;a master clutch including a driving portion connected to the engine crankshaft and a driven portion coupled to the transmission input shaft and adapted to frictionally engage the driving portion between open and closed positions; anda controller that selectively operates the transmission system in a first operating mode that includes defueling the engine while the vehicle is moving based on vehicle operating conditions and routes rotational energy from the output shaft, through the countershaft and into the motor generator.2. The transmission system of wherein the master clutch is in the ...

Transmission mounted electrical charging system with engine off coasting and dual mode hvac

A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes a transmission, a motor generator an HVAC compressor and a controller. The transmission has an input shaft, a mainshaft, an output shaft and a countershaft offset from the input shaft. The countershaft is drivably connected to the first input shaft and a mainshaft. The motor generator is selectively couple to the countershaft. The HVAC compressor is selectively driven by the motor generator. The controller operates the transmission system in various modes based on operating conditions.

Piecewise variable displacement power transmission

In one embodiment, a hydraulic circuit has an input shaft, at least one positive displacement hydraulic pump, a plurality of positive displacement hydraulic motors, and at least one fluid line operatively connecting the at least one positive displacement hydraulic pump to the positive displacement hydraulic motors. In operation, the at least one positive displacement hydraulic pump is placed in an operative condition. At least one of the positive displacement hydraulic motors is also placed in an operative condition. A flow rate of fluid in the fluid line is measured, and the remaining positive displacement hydraulic motors are switched between an operative condition and a bypass condition according to the measured flow rate of the fluid.

Hydraulic system including fixed displacement pump for driving multiple variable loads and method of operation

Valve manifold

A valve is provided including a first valve member (64) and a second valve member (66). The first valve member (64) includes a first step and a first orifice (82) adjacent the first step. The second valve member (66) includes a second step and a second orifice (80) adjacent the second step. The second valve member (66) is movable relative to the first valve member (64) between an open position, in which the first orifice is fluidly connected the second orifice, and a closed position, in which the first orifice is substantially fluidly disconnected from the second orifice. The first and second steps are fluidly connected to the second orifice and substantially fluidly disconnected from the first orifice when the second valve member (66) is in the closed position, and the first and second steps are fluidly connected to the first and second orifices when the second valve member (66) is in the open position.

Transmission mounted electrical charging system with engine off coasting and dual mode hvac

A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes a transmission, a motor generator an HVAC compressor and a controller. The transmission has an input shaft, a mainshaft, an output shaft and a countershaft offset from the input shaft. The countershaft is drivably connected to the first input shaft and a mainshaft. The motor generator is selectively couple to the countershaft. The HVAC compressor is selectively driven by the motor generator. The controller operates the transmission system in various modes based on operating conditions.

Transmission mounted electrical charging system with engine off coasting and dual mode hvac

A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes a transmission, a motor generator an HVAC compressor and a controller. The transmission has an input shaft, a mainshaft, an output shaft and a countershaft offset from the input shaft. The countershaft is drivably connected to the first input shaft and a mainshaft. The motor generator is selectively couple to the countershaft. The HVAC compressor is selectively driven by the motor generator. The controller operates the transmission system in various modes based on operating conditions.

Proportional valve employing simultaneous and hybrid actuation

Disclosed is an exemplary valve having a first valve member that may include at least one orifice, and which is moveable between a first position and a second position, and a second valve member that includes at least one orifice, and which is moveable relative to the first valve member between a first position, in which the at least one orifice of the second valve member is fluidly disconnected from the at least one orifice of the first valve member, and a second position, in which the at least one orifice of the second valve member is fluidly connected to the at least one orifice of the first valve member. The exemplary valve may also include first and second actuators for moving the first and second valve members between their respective first and second positions.

Transmission mounted electrical charging system with engine off coasting and dual mode HVAC

A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes a transmission, a motor generator an HVAC compressor and a controller. The transmission has an input shaft, a mainshaft, an output shaft and a countershaft offset from the input shaft. The countershaft is drivably connected to the first input shaft and a mainshaft. The motor generator is selectively couple to the countershaft. The HVAC compressor is selectively driven by the motor generator. The controller operates the transmission system in various modes based on operating conditions.

Solenoid driver circuit

A solenoid drive circuit (100) includes a boost energy storage device (1), such as a capacitor, that captures energy from and discharges energy to a solenoid (104). Switches (Sl, S2) control the connection between the boost device (1), the solenoid (104), and a power source (102). This allows the solenoid response time to be variable based on the characteristics of the boost device as well as the solenoid. By providing two different solenoid current rise and decay rates and by capturing and re-using energy stored in the solenoid, the inventive drive circuit enhances solenoid response and increases efficiency.

Drive circuit and method of using the same

A drive circuit may include a SUPPLY that outputs a first voltage potential, an energy storage device that outputs a second voltage potential, and a LOAD. Switches control the flow of current through the LOAD in a flow direction or in a direction opposite to the flow direction. The first or second voltage potentials can produce current.

Transmission system for commercial vehicle powertrain electrification

A transmission system selectively coupled to an engine crankshaft of an internal combustion engine arranged on a vehicle includes a transmission, a motor generator, a master clutch and a controller. The transmission includes an input shaft, a mainshaft, an output shaft and a countershaft offset from the input shaft. The countershaft is drivably connected to the first input shaft and the mainshaft. The motor generator is selectively coupled to the countershaft. The master clutch includes a driving portion connected to the engine crankshaft and a driven portion coupled to the transmission input shaft and adapted to frictionally engage the driving portion between open and closed positions. The controller selectively operates the transmission system in a first operating mode that includes defueling the engine while the vehicle is moving based on vehicle operating conditions and routes rotational energy from the output shaft, through the countershaft and into the motor generator.

Drive circuit and method of using the same

A drive circuit may include a SUPPLY that outputs a first voltage potential, an energy storage device that outputs a second voltage potential, and a LOAD. Switches control the flow of current through the LOAD in a flow direction or in a direction opposite to the flow direction. The first or second voltage potentials can produce current.