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Vehicle speed control in a cruise mode using vehicle brakes

A cruise control and brake technology, applied in the direction of non-electric variable control, speed/acceleration control, control device, etc., can solve the problem of inability to restrain

Active Publication Date: 2010-01-27
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, even when operating in one or more of the aforementioned modes, the powertrain control module may still be unable to inhibit the actual vehicle speed from exceeding the upper limit of the desired speed range

Method used

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  • Vehicle speed control in a cruise mode using vehicle brakes
  • Vehicle speed control in a cruise mode using vehicle brakes
  • Vehicle speed control in a cruise mode using vehicle brakes

Examples

Experimental program
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Embodiment Construction

[0020] In essence, the following description is only exemplary, and is in no way intended to limit the present disclosure and its application or use. For clarity, the same reference numbers are used in the drawings to indicate similar elements. As used herein, the phrase "at least one of A, B, and C" should be considered to mean the use of a non-exclusive logical "or" (A or B or C). It should be understood that the steps in the method can be performed in a different order without changing the principle of the present disclosure.

[0021] When used in this article, the term "module" refers to an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated or group) that executes one or more software or firmware programs, and memory, and a combinational logic circuit , And / or other suitable components that provide the described functions.

[0022] A vehicle traveling along a surface (for example, a road surface) may encounter a downhill. Do...

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PUM

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Abstract

A cruise control system includes a speed difference module that compares a current vehicle speed and a target cruise speed, and a brake module that selectively actuates a brake when the current vehicle speed is greater than the target cruise speed by a predetermined speed difference. A related method is also provided and includes comparing a current vehicle speed and a target cruise speed, and selectively actuating a brake when the current vehicle speed is greater than the target cruise speed by a predetermined speed difference. The method includes selectively actuating the brake based on a negative drive torque of a powerplant. The method also includes determining a desired braking force based on the current vehicle speed and the target cruise speed, and actuating the brake to generate an actual braking force less than or equal to the desired braking force.

Description

[0001] Cross references to related applications [0001] This application claims the benefits of U.S. Provisional Application No. 61 / 082,859 filed on July 23, 2008. The entire disclosure of the aforementioned application is incorporated herein by reference. Technical field [0002] The present disclosure relates to motor vehicles, and more specifically, to a control system and method for vehicle speed control. Background technique [0003] The background description provided here is for the purpose of generally presenting the background of the present disclosure. Part of the inventor’s work is described in the background technology section. This part of the content and the description at the time of filing the application do not constitute aspects of the prior art, and it is neither explicitly nor implicitly admitted to destroy the prior art of the present invention. [0004] A motor vehicle may include a powertrain including a power plant (for example, an engine, an electric motor,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K31/02B60K31/04
CPCB60W30/14B60K31/00
Inventor P·J·摩根D·W·明纳
Owner GM GLOBAL TECH OPERATIONS LLC