Closed pedal deceleration control
First Claim
1. A system for controlling deceleration of a vehicle having a multiple cylinder internal combustion engine, each cylinder having at least one electronically actuated gas exchange valve, the system comprising:
- a microprocessor-based controller;
an accelerator pedal mounted in a passenger compartment of the vehicle and including a position sensor in communication with the controller;
a speed sensor in communication with the controller for determining vehicle speed based on rotational speed of at least one vehicle component; and
an engine driven electrically controllable vehicle accessory in communication with the controller;
wherein the controller determines a desired vehicle deceleration when the speed sensor indicates the vehicle is moving and the accelerator position sensor indicates the accelerator pedal has moved to a released position, the controller further controlling the at least one gas exchange valve and electrically controllable vehicle accessory such that measured vehicle deceleration approaches the desired vehicle deceleration.
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Accused Products
Abstract
A system and method for controlling an internal combustion engine in a vehicle include controlling the engine to achieve a desired vehicle speed/deceleration when the accelerator pedal is released. A desired vehicle deceleration may be determined based on current transmission gear, vehicle speed, and road grade. Vehicle speed/deceleration is measured using a vehicle speed sensor and/or wheel speed sensor(s) and the engine is controlled to reduce the error between the desired and measured decelerations. Electronically actuated intake and/or exhaust valves, and/or an electronically controlled throttle may be used to achieve a desired vehicle deceleration profile. A selector switch or similar device may be used by the driver to select a desired deceleration profile from two or more available profiles and/or a desired deceleration profile may be automatically selected based on current ambient and/or vehicle/engine operating conditions.
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Citations
22 Claims
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1. A system for controlling deceleration of a vehicle having a multiple cylinder internal combustion engine, each cylinder having at least one electronically actuated gas exchange valve, the system comprising:
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a microprocessor-based controller; an accelerator pedal mounted in a passenger compartment of the vehicle and including a position sensor in communication with the controller; a speed sensor in communication with the controller for determining vehicle speed based on rotational speed of at least one vehicle component; and an engine driven electrically controllable vehicle accessory in communication with the controller; wherein the controller determines a desired vehicle deceleration when the speed sensor indicates the vehicle is moving and the accelerator position sensor indicates the accelerator pedal has moved to a released position, the controller further controlling the at least one gas exchange valve and electrically controllable vehicle accessory such that measured vehicle deceleration approaches the desired vehicle deceleration. - View Dependent Claims (2)
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3. A computer readable storage medium having stored data representing instructions executable by a computer to control an internal combustion engine in a vehicle having an accelerator pedal, the computer readable storage medium comprising:
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instructions for controlling at least one engine actuator to provide a first engine torque corresponding to a first engine operating point in response to the accelerator pedal being released; and instructions for controlling at least one engine actuator to provide a second engine torque corresponding to the first engine operating point in response to the accelerator pedal being released, the second engine torque varying with vehicle operating conditions.
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4. A method for controlling an internal combustion engine in a vehicle having an accelerator pedal to provide a characteristic vehicle deceleration under varying ambient conditions, the method comprising:
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controlling at least one engine actuator to provide a first engine torque corresponding to a first engine operating point in response to the accelerator pedal being released; and controlling at least one engine actuator to provide a second engine torque corresponding to the first engine operating point in response to the accelerator pedal being released, the second engine torque varying with vehicle operating conditions. - View Dependent Claims (5, 6, 7, 8)
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9. A method for controlling an internal combustion engine in a vehicle having an accelerator pedal, the method comprising:
controlling the engine to reduce error between measured and desired vehicle deceleration in response to the accelerator pedal being released. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification