An electric vehicle control device includes an idling-sliding control unit that provides control to reduce or prevent idling and sliding that may occur on a wheel of an electric vehicle. The idling-sliding control unit includes an idling-sliding detection unit for detecting idling or sliding that has occurred on the electric vehicle, and a torque command value generation unit that generates a torque command value used for reducing or preventing idling or sliding, based on output of the idling-sliding detection unit. When a prediction signal representing an anticipated occurrence of idling or sliding is inputted, the torque command value generation unit performs narrowing of the torque command value regardless of whether or not the idling-sliding control unit is performing idling-sliding control.

An electric vehicle control device includes an idling-sliding control unit that provides control to reduce or prevent idling and sliding that may occur on a wheel of an electric vehicle. The idling-sliding control unit includes an idling-sliding detection unit for detecting idling or sliding that has occurred on the electric vehicle, and a torque command value generation unit that generates a torque command value used for reducing or preventing idling or sliding, based on output of the idling-sliding detection unit. When a prediction signal representing an anticipated occurrence of idling or sliding is inputted, the torque command value generation unit performs narrowing of the torque command value regardless of whether or not the idling-sliding control unit is performing idling-sliding control.

A traction system is provided for a rail draft vehicle including an engine with a driveshaft, at least a pair of rubber-tired traction wheels, and at least one rail guide wheel pressurized relative to the vehicle by at least one fluid-powered cylinder. Included in the system are a programmable processor connected to a driveshaft speed sensor, a rail guide wheel speed sensor, an engine throttle controller, a fluid-powered cylinder controller and a vehicle control panel. The processor is constructed and arranged for automatically adjusting the engine throttle controller in coordination with the fluid-powered cylinder controller for achieving movement of the rail draft vehicle from a dead stop position by increasing applied vehicle weight upon the traction wheels by the at least one fluid-powered cylinder and adjusting engine RPM's until the vehicle begins movement as detected by the rail guide wheel speed sensor.

A traction system is provided for a rail draft vehicle including an engine with a driveshaft, at least a pair of rubber-tired traction wheels, and at least one rail guide wheel pressurized relative to the vehicle by at least one fluid-powered cylinder. Included in the system are a programmable processor connected to a driveshaft speed sensor, a rail guide wheel speed sensor, an engine throttle controller, a fluid-powered cylinder controller and a vehicle control panel. The processor is constructed and arranged for automatically adjusting the engine throttle controller in coordination with the fluid-powered cylinder controller for achieving movement of the rail draft vehicle from a dead stop position by increasing applied vehicle weight upon the traction wheels by the at least one fluid-powered cylinder and adjusting engine RPM's until the vehicle begins movement as detected by the rail guide wheel speed sensor.

A system includes a drive system having one or more traction motors coupled in driving relationship to a plurality of wheels of a vehicle system. The traction motors are configured to provide both motive power for the vehicle system in a propel mode of operation and retarding effort to brake the vehicle system in a braking mode of operation. The system further includes a parking brake for maintaining a static position of the vehicle system when in an engaged state, and a controller configured to detect when the parking brake is in the engaged state. The controller is further configured to control at least one of the one or more traction motors to provide a braking effort to resist movement of the vehicle system when the parking brake is in the engaged state.

A system includes a drive system having one or more traction motors coupled in driving relationship to a plurality of wheels of a vehicle system. The traction motors are configured to provide both motive power for the vehicle system in a propel mode of operation and retarding effort to brake the vehicle system in a braking mode of operation. The system further includes a parking brake for maintaining a static position of the vehicle system when in an engaged state, and a controller configured to detect when the parking brake is in the engaged state. The controller is further configured to control at least one of the one or more traction motors to provide a braking effort to resist movement of the vehicle system when the parking brake is in the engaged state.

A system includes a drive system having one or more traction motors coupled in driving relationship to a plurality of wheels of a vehicle system. The traction motors are configured to provide both motive power for the vehicle system in a propel mode of operation and retarding effort to brake the vehicle system in a braking mode of operation. The system further includes a parking brake for maintaining a static position of the vehicle system when in an engaged state, and a controller configured to detect when the parking brake is in the engaged state. The controller is further configured to control at least one of the one or more traction motors to provide a braking effort to resist movement of the vehicle system when the parking brake is in the engaged state.

A system includes a drive system having one or more traction motors coupled in driving relationship to a plurality of wheels of a vehicle system. The traction motors are configured to provide both motive power for the vehicle system in a propel mode of operation and retarding effort to brake the vehicle system in a braking mode of operation. The system further includes a parking brake for maintaining a static position of the vehicle system when in an engaged state, and a controller configured to detect when the parking brake is in the engaged state. The controller is further configured to control at least one of the one or more traction motors to provide a braking effort to resist movement of the vehicle system when the parking brake is in the engaged state.

Various methods and systems are provided for adjusting an air-fuel ratio for combustion in an engine. In one embodiment, a method for an engine (e.g., a method for controlling an engine system) comprises responding to a sensed change in a load on the engine, or indications of engine knock or misfire, by one or more of: altering a speed of the engine, adjusting a fueling flow rate into at least one cylinder of the engine, and adjusting a position of a valve in a bypass passage configured to direct compressed intake air away from cylinders of the engine to obtain a determined air-fuel ratio; and thereby maintaining an air-fuel ratio in a determined range.

Various methods and systems are provided for adjusting an air-fuel ratio for combustion in an engine. In one embodiment, a method for an engine (e.g., a method for controlling an engine system) comprises responding to a sensed change in a load on the engine, or indications of engine knock or misfire, by one or more of: altering a speed of the engine, adjusting a fueling flow rate into at least one cylinder of the engine, and adjusting a position of a valve in a bypass passage configured to direct compressed intake air away from cylinders of the engine to obtain a determined air-fuel ratio; and thereby maintaining an air-fuel ratio in a determined range.