An electric power supply control apparatus for a vehicle decreases a first electric power prior to switching the modes, when a sum of a request value of a second electric power and the first electric power exceeds a total electric power upper limit value in the mode before the switching, and switches the modes after the sum of the decreased first electric power and the request value of the second electric power becomes equal to or smaller than the total electric power upper limit value.

A control system for an off-highway vehicle including a foot operated drive pedal, a foot operated retard pedal, and a hand operated auxiliary drive/retard control. The auxiliary drive/retard control is operable in a first state to signal a request for drive torque and a second state to signal a request for retard torque.

A method of operating a hybrid electric vehicle includes driving an engine to generate mechanical energy, converting the mechanical energy into a first AC voltage, estimating a total DC link current associated with a respective plurality of loads of the hybrid electric vehicle, converting, with a first inverter, the first AC voltage into a DC bus voltage by regulating the DC bus voltage based on the total DC link current, and inverting, with a respective plurality of inverters, the DC bus voltage into a respective plurality of other AC voltages to drive the respective plurality of loads on the hybrid electric vehicle.

A hybrid work machine is configured with an engine 41, a hydraulic pump 51, a hydraulic actuator, a generator motor 61 coupled to the engine 41, an electric storage device 62 that transmits and receives electric power to and from the generator motor 61, an engine controller 42 that controls the engine 41 based on a target engine revolution speed, a power controller 63 that controls action of the generator motor 61, a controller 72 that controls the engine controller 42 and the power controller 63, and a target engine revolution speed change instructing device that give instructions on a change in the target engine revolution speed. The controller 72 controls the engine controller 42 and the power controller 63 to act the generator motor 61 as a generator until an actual revolution speed of the engine 41 is reduced to a revolution speed corresponding to a target engine revolution speed after change if the target engine revolution speed has been changed to be lower while the engine 41 is in an unloaded state. It is thereby possible to suppress noise of the engine in the case where the target engine revolution speed has been changed to be lower while the engine is in an unloaded state.

A control apparatus for a hybrid construction machine includes an engine, a motor generator driven by the engine and capable of generating electric power, a hydraulic pump driven by total torque of the engine and the motor generator, a power storage device, an inverter, a filter that collects a particulate material in exhaust gas of the engine, and a control section outputting a command signal for controlling powering operation or regeneration operation of the motor generator. The control apparatus further includes a powering operation limitation section that inputs thereto an ordinary torque command calculated by a torque command value calculation section and a demand signal for regeneration of the filter decided by a filter regeneration decision section and calculates the command signal in response to the input signals. When a filter regeneration demand signal is available, a command signal for limiting the powering operation of the motor generator is calculated.

A vehicle control system includes at least one sensor and a power supply control system. The sensor is on board a vehicle system and configured to generate vehicle data relating to a condition or parameter associated with the vehicle system. The power supply control system is configured to control one or more power supplies on board the vehicle system and to receive the vehicle data from the at least one sensor. The power supply control system is also configured to compare the vehicle data to one or more criteria relating to vehicle movement, and, in response to a determination that the vehicle data meets the criteria and receipt of a signal indicative of the vehicle system carrying (or being configured to carry) cargo of a predetermined material, generate a control signal to deactivate at least one of the power supplies.

A vehicle electronic system having an electronic controller and a power switching device configured to switch between a first power setting and a second power setting. The first power setting includes powering at least one of a plurality of electrically powered accessories with power from an on-board electric power supply. The second power setting includes powering the at least one of the plurality of electrically powered accessories with power from an external power supply thereby preventing the use of electric power from the on-board electric power supply. The electronic controller is configured to electronically operate the switching device to switch between the first power setting and the second power setting such that in response to detection of power from the external power supply, the switching device is switched to the second power mode.

A vehicle and a control method of the vehicle are disclosed. In particular, the vehicle includes: a generator; a battery; a plurality of electronic components; a power distribution apparatus to distribute power from the generator and the battery to the plurality of electronic components; and a power management apparatus to determine an electrical characteristic of each of the generator, the battery and the power distribution apparatus, and a power supply relationship between the generator, the battery and the power distribution apparatus.

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.

A grass mower includes a vehicle speed instruction value calculation section (53) for generating a vehicle speed instruction value including a maximal vehicle speed, based on an operational position of a man-operable vehicle speed controlling tool (15), a mode selection section (70) for selecting a control mode from a plurality of control modes, a control table (52) in which a plurality of control parameters are set, a vehicle speed control target value calculation section (54) configured to calculate a vehicle speed control target value, based on a vehicle speed instruction value generated by the vehicle speed instruction value calculation section (53) and a selected control parameter corresponding to the control mode selected by the mode selection section (70), a cutter blade control target value calculation section (55) configured to calculate a rotational speed control target value for a cutter blade (30), based on the selected control parameter, and a cutter blade control section (4B) configured to control the cutter blade drive mechanism (31) based on the rotational speed control target value.