Vehicle speed control system and method
First Claim
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1. A system of controlling a vehicle speed of a vehicle with an engine, the system comprising:
- a gear shift selector operable by a user of the vehicle to be set in one of a plurality of forward gear levels;
a sensor configured to measure an incline grade of the vehicle;
an electronic memory configured to store a plurality of vehicle target speeds that each correspond to both one of the plurality of forward gear levels of the gear shift selector and one of the plurality of incline grades of the vehicle; and
,a controller communicatively coupled to the electronic memory and the sensor, the controller configured to;
receive a signal from the gear shift selector indicating a set forward gear level of the plurality of forward gear levels,receive a signal from the sensor indicating the incline grade of the vehicle,identify a requested vehicle target speed of the plurality of target speeds that corresponds to the set forward gear level of the gear shift selector and the incline grade of the vehicle, andgenerate at least one of an engine torque request and a brake torque request to control the vehicle speed to equal the requested vehicle target speed,wherein the controller identifies the requested vehicle target speed independent of any operating conditions of the engine.
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Abstract
A system and method of operating a vehicle at a driver selected target speed. The system and method configured to identify a target speed based on a position of a gear shift selector and control engine torque and brake pressure to control the vehicle to operate at the target speed. The system and method is further provides manipulating the engine torque and brake pressure of the vehicle in response to a driver'"'"'s throttle and brake commands to operate at a speed desired by the driver.
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Citations
16 Claims
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1. A system of controlling a vehicle speed of a vehicle with an engine, the system comprising:
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a gear shift selector operable by a user of the vehicle to be set in one of a plurality of forward gear levels; a sensor configured to measure an incline grade of the vehicle; an electronic memory configured to store a plurality of vehicle target speeds that each correspond to both one of the plurality of forward gear levels of the gear shift selector and one of the plurality of incline grades of the vehicle; and
,a controller communicatively coupled to the electronic memory and the sensor, the controller configured to; receive a signal from the gear shift selector indicating a set forward gear level of the plurality of forward gear levels, receive a signal from the sensor indicating the incline grade of the vehicle, identify a requested vehicle target speed of the plurality of target speeds that corresponds to the set forward gear level of the gear shift selector and the incline grade of the vehicle, and generate at least one of an engine torque request and a brake torque request to control the vehicle speed to equal the requested vehicle target speed, wherein the controller identifies the requested vehicle target speed independent of any operating conditions of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16)
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9. A method of controlling vehicle speed of a vehicle with an engine, the method comprising:
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storing, in an electronic memory, a plurality of vehicle target speeds that each correspond to one of a plurality of respective forward gear levels of a gear shift selector of the vehicle and one of a plurality of incline grades of the vehicle; receiving, by an electronic controller, a signal indicating a forward gear level of the gear shift selector; receiving, by the electronic controller, an inclination signal indicating an incline grade of the vehicle; identifying, by the electronic controller, a requested vehicle target speed of the plurality of target speeds that corresponds to the forward gear level of the gear shift selector and the incline grade of the vehicle; and generating, by the electronic controller, at least one of an engine torque request and a brake torque request to control the vehicle speed to equal the requested vehicle target speed, wherein the electronic controller identifies the requested vehicle target speed independent of any operating conditions of the engine.
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Specification