Coasting deceleration control for a vehicle
First Claim
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1. A vehicle coasting deceleration control system comprising:
- a motor/generator arranged in a drive-train of a vehicle, and a controller configured to determine a driver demand for deceleration of the vehicle at a time of coasting accompanied by an accelerator releasing operation, the controller further configured to control the motor/generator to decelerate the vehicle responsive to the driver demand.
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Abstract
A vehicle coasting deceleration control system has a motor/generator arranged in a drive-train of a vehicle. A controller is configured to determine a driver demand regarding deceleration of the vehicle at a time of coasting accompanied by an accelerator releasing operation. The controller is further configured to control the motor/generator to decelerate the vehicle according to the determined driver demand regarding deceleration.
55 Citations
21 Claims
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1. A vehicle coasting deceleration control system comprising:
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a motor/generator arranged in a drive-train of a vehicle, and a controller configured to determine a driver demand for deceleration of the vehicle at a time of coasting accompanied by an accelerator releasing operation, the controller further configured to control the motor/generator to decelerate the vehicle responsive to the driver demand. - View Dependent Claims (2, 3)
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4. A coasting deceleration control device for use in a vehicle of a type operated by a driver and having a driving system including an engine with an engine operating speed, a transmission having a variable gear ratio, and a motor/generator having adjustable torque in the driving system, the coasting deceleration control device comprising:
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a sensor for sensing a releasing of an accelerator by the driver;
a controller operatively configured in the driving system with executable steps for;
computing a driver demand for deceleration based upon the sensing of a releasing of the accelerator by the driver, computing a target coasting deceleration based upon the computed driver demand for deceleration, and controlling the gear ratio of the transmission and the torque of the motor/generator in response to the computing of the target coasting deceleration so that the vehicle may obtain the computed target coasting deceleration.
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5. A coasting deceleration control device for use in a driver operated vehicle having a driving system including an engine having an engine operating speed, a transmission having a variable gear ratio, and a motor/generator having adjustable torque in the driving system, the coasting deceleration control device comprising:
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a program executable on the deceleration control device for computing;
a driver demand for deceleration based upon sensing a releasing of an accelerator by the driver, and a target coasting deceleration based upon the driver demand for deceleration that is detected, and a driving system controller responsive to the program computed target coasting deceleration for selecting a gear ratio of the transmission, for adjusting the torque of the motor/generator, or for adjusting both the gear ratio of the transmission and the torque of the motor/generator so that the vehicle may obtain the computed target deceleration. - View Dependent Claims (6, 7)
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8. A coasting deceleration control device for a vehicle having a driving system including a motor/generator and a transmission, comprising:
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a program executable on the coasting deceleration control device for performing;
a target coasting deceleration computing process for determining a driver demand regarding a level of deceleration at a time of coasting accompanied by an accelerator releasing operation, wherein the target coasting deceleration computing process calculates a target coasting deceleration, and wherein the target coasting deceleration increases as the driver demand regarding a level of performing deceleration is stronger; and
a coasting deceleration control process for adjusting the target coasting deceleration calculated by the target coasting deceleration computing process by controlling torque of the motor/generator. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A coasting deceleration control device for a driver operated vehicle having a driving system including a motor/generator and a transmission, comprising:
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a target coasting deceleration computing means for determining a driver demand for deceleration at a time of coasting accompanied by an accelerator releasing operation, for calculating a target coasting deceleration based upon the determined driver demand for deceleration, and wherein the calculated target coasting deceleration increases as the driver demand for deceleration is stronger; and
a coasting deceleration control means for adjusting deceleration by controlling torque of the motor/generator to obtain the target coasting deceleration calculated by the target coasting deceleration computing process.
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21. A coasting deceleration control process for use in a vehicle having a driving system including an engine having an engine operating speed, a transmission having a variable gear ratio, and a motor/generator having adjustable torque in the driving system, the deceleration control device comprising:
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sensing a releasing of the accelerator by the driver;
computing a driver demand for deceleration based upon the sensing of a releasing of the accelerator by the driver, computing a target coasting deceleration based upon the driver demand for deceleration that is computed, and controlling the gear ratio of the transmission and the torque of the motor/generator in response to the computing of the target coasting deceleration so that the vehicle may obtain the computed target deceleration.
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Specification