An electronic control unit of a hybrid vehicle is configured to determine whether or not parking operation of the hybrid vehicle is being performed. The electronic control unit is configured to control the engine and the rotary electric machine such that starting the engine when the parking operation of the hybrid vehicle is being performed is harder than starting the engine when the parking operation of the hybrid vehicle is not being performed.

Systems and methods for operating a hybrid powertrain that includes an engine and a motor/generator are described. The systems and methods adjust torque converter clutch opening responsive to whether or not a motor/generator is available to provide a negative torque to a driveline. Further, the motor/generator and the vehicle's engine are operated to provide a desired amount of driveline braking.

A drive control system is provided, which is mounted on a vehicle configured to travel by operation of a driver. The drive control system includes an actuator configured to output a driving force for the vehicle to travel, an output sensor configured to detect a driving force requested by the operation of the driver, and a control device configured to control operation of the actuator based on the requested driving force detected by the output sensor. The control device sets a target output value by adding a given delay time to a requested output value set corresponding to the requested driving force, and controls the actuator so as to output the target output value based on a response characteristic of the actuator.

A transmission control device (4) includes: a gear ratio calculating unit (4a) for calculating a target gear ratio of a transmission (2) based on a gear ratio control mode, to thereby control the transmission; an electric motor drive torque calculating unit (4b) for calculating a drive torque of an electric motor (9) based on the gear ratio control mode when drive of the electric motor (9) is permitted; and an engine torque calculating unit (4c) for calculating an output torque of an engine (1) based on the gear ratio control mode so as to achieve a best fuel efficiency operation state. The gear ratio calculating unit (4a) switches processing of calculating a gear ratio based on whether or not the drive of the electric motor (9) is permitted.

Embodiments of the present invention provide An electric machine control system for a vehicle, the electric machine control system comprising one or more controllers, wherein the vehicle comprises an electric machine arranged to be selectively coupleable to provide torque to at least one wheel of an axle of the vehicle, the control system comprising input means to receive a speed signal indicative of a speed of the vehicle, processing means arranged to determine a coupling state of the electric machine to the at least one wheel of the axle in dependence on the speed signal, and output means arranged to output a coupling signal indicative of the coupling state to control coupling of the electric machine to the at least one wheel of the axle.

Embodiments of the present invention provide a control system (200) for an electric machine (120) of a vehicle, the control system comprising one or more controllers, the control system comprising input means (230) to receive a torque communication signal (255) indicative of torque communication through a belt (130) associated with the electric machine, processing means (210) arranged to determine a torque limit for the electric machine in dependence on the torque communication signal and a first torque threshold, and output means (240) arranged to output a torque limit signal (245) in dependence on the torque limit to control the torque communicated through the belt associated with the electric machine.

A hybrid starter and generator (HSG) cooling control apparatus for a hybrid vehicle, and an HSG cooling control method thereof, the apparatus includes a receiver configured to receive driving information of an engine and a hybrid starter and generator (HSG), a cooling unit configured to cool the HSG, and a controller configured to control the cooling unit, wherein the controller determines whether the HSG is in an idle charging mode based on driving information of the engine and the HSG, determines whether the temperature of the HSG is greater than a first cooling-required temperature when the HSG is in the idle charging mode, and controls the cooling unit to be turned on when the temperature of the HSG is greater than the first cooling-required temperature.

Systems and methods for improving operation of a driveline disconnect clutch for a hybrid vehicle shifting are presented. In one example, pressure of a working fluid supplied to the driveline disconnect clutch is adjusted in response to a rate of change in accelerator pedal position. Further, pressure of the working fluid may be decreased responsive to selected operating conditions.

A military vehicle includes a chassis, a front axle coupled to the chassis, a rear axle coupled to the chassis, and a driveline. The driveline includes an engine, an energy storage system, a front end accessory drive positioned in front of and coupled to the engine, a transmission coupled to at least one of the front axle or the rear axle, a second motor coupled to the transmission and electrically coupled to the energy storage system, and a clutch positioned between the engine and the second motor. The front end accessory drive includes an air compressor and a first motor. The first motor is electrically coupled to the energy storage system. The clutch is spring-biased into engagement with the engine and pneumatically disengaged by an air supply selectively provided thereto based on operation of the air compressor. The driveline is operable in an engine-only mode and an electric-only mode.

A system for controlling a hybrid propulsion system includes a computer programmed to obtain altitude and terrain information associated with a predetermined route for the hybrid propulsion system comprising a first energy source and a second energy source. The computer is also programmed to obtain current and forecast ambient weather information associated with the predetermined route of the hybrid propulsion system, determine a power requirement and a torque requirement of the hybrid propulsion system associated with the altitude and the terrain along the predetermined route of the hybrid propulsion system, generate a trip plan to optimize at least one of a plurality of performance parameters of the hybrid propulsion system as the hybrid propulsion system travels along the predetermined route, and preferentially select the first energy source and/or the second energy source based on the trip plan.