Control of vehicle drive system
AssigneeNissan Motor Co., Ltd.
InventorHiroyuki Kiuchi
Life of this patent
Estimating the term…
Abstract
An air compressor (12b) starts to operate when fuel to an internal combustion engine (1) is cut off and the engine (1) and a transmission (4) are directly engaged. Upon receiving a drive request signal, a controller (21) outputs a lockup clutch disengaging request. The controller (21) resumes fuel supply and starts driving of the air compressor (12b) only when it is confirmed that the lockup clutch (3) has been disengaged, thereby preventing a recovery shock from generating due to resumption of fuel supply during the lockup clutch (3) being in the engaged state.
Claims10
A control device for a drive system of a vehicle, the drive system comprising an engine, a transmission, a torque converter which transmits an output torque of the engine to the transmission via a fluid, a lockup clutch which operates between an engaged state in which the engine and the transmission are directly engaged and a disengaged state in which the engine and the transmission are not directly engaged, an accessory driven by the engine in response to an accessory drive request signal, and a fuel supply device which performs and cuts off fuel supply to the engine according to a running condition of the vehicle, the control device comprising:
- a programmable controller programmed to:
- operate, when the accessory drive request signal has been generated in a state where the fuel supply is cut off and the lockup clutch is in the engaged state, the lockup clutch to enter the disengaged state;
- determine whether or not the lockup clutch has been in the disengaged state;
- and
- control the engine to start driving the accessory and control the fuel supply device to resume fuel supply, only when the lockup clutch has been in the disengaged state.
A control device for a drive system of a vehicle, the drive system comprising an engine, a transmission, a torque converter which transmits an output torque of the engine to the transmission via a fluid, a lockup clutch which operates between an engaged state in which the engine and the transmission are directly engaged and a disengaged state in which the engine and the transmission are not directly engaged, an accessory driven by the engine in response to an accessory drive request signal, and a fuel supply device which performs and cuts off fuel supply to the engine according to a running condition of the vehicle, the control device comprising:
- means for operating, when the accessory drive request signal has been generated in a state where the fuel supply is cut off and the lockup clutch is in the engaged state, the lockup clutch to enter the disengaged state;
- means for determining whether or not the lockup clutch has been in the disengaged state;
- and
- means for controlling the engine to start driving the accessory and controlling the fuel supply device to resume fuel supply, only when the lockup clutch has been in the disengaged state.
A control method for a drive system of a vehicle, the drive system comprising an engine, a transmission, a torque converter which transmits an output torque of the engine to the transmission via a fluid, a lockup clutch which operates between an engaged state in which the engine and the transmission are directly engaged and a disengaged state in which the engine and the transmission are not directly engaged, an accessory driven by the engine in response to an accessory drive request signal, and a fuel supply device which performs and cuts off fuel supply to the engine according to a running condition of the vehicle, the control method comprising:
- operating, when the accessory drive request signal has been generated in a state where the fuel supply is cut off and the lockup clutch is in the engaged state, the lockup clutch to enter the disengaged state;
- determining whether or not the lockup clutch has been in the disengaged state;
- and
- controlling the engine to start driving the accessory and controlling the fuel supply device to resume fuel supply, only when the lockup clutch has been in the disengaged state.
Dependencies are inferred from the claim text.