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Control system and method based on estimated engine speed

A technology of engine speed and control system, applied in engine control, machine/engine, electrical control, etc., can solve the problems of reducing the effectiveness of ECM and TCM control, inaccuracy, engine speed inaccuracy, etc.

Inactive Publication Date: 2012-03-14
GM GLOBAL TECH OPERATIONS LLC
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AI Technical Summary

Problems solved by technology

Inaccuracies in a given tooth profile can result in inaccuracies in engine speed
In turn, can reduce the effectiveness of ECM and TCM control

Method used

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  • Control system and method based on estimated engine speed
  • Control system and method based on estimated engine speed
  • Control system and method based on estimated engine speed

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Embodiment Construction

[0044] The following description is merely exemplary in nature and is not intended to limit the invention, its application or uses. For purposes of clarity, the same reference numbers will be used in the drawings to identify similar elements. As used herein, the phrase at least one of A, B, and C should be construed to mean a logical (A or B or C) using a non-exclusive logical or. It should be understood that steps within a method may be executed in different order without altering the principles of the present invention.

[0045] As used herein, the term "module" means an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory, a combination of Logic circuits and / or other suitable components providing the described functionality.

[0046] A control system and method in accordance with the principles of the present invention monitors pulses of a crankshaft position signal corresponding to teeth on a cranksha...

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Abstract

The present invention relates to a control system and a method based on an estimated engine speed. The control system includes a speed determination module and a profile estimation module. The speed determination module determines previous engine speeds based on a predetermined profile of a crankshaft position sensor and previous pulse times corresponding to teeth on the crankshaft position sensor. The profile estimation module performs data fitting to determine an estimated profile of the crankshaft position sensor based on the previous pulse times and the previous engine speeds. The speed determination module determines present engine speeds based on the estimated profile and present pulse times corresponding to the teeth on the crankshaft position sensor.

Description

technical field [0001] The present invention relates to control systems and methods for controlling a powertrain system based on estimated engine speed. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. To the extent this background description is in place, the work of the presently named inventors, and those aspects of that description that may not have constituted prior art at the time of filing, are neither expressly nor implicitly admitted to be prior art to the present invention. have technology. [0003] The Engine Control Module (ECM) and Transmission Control Module (TCM) control the engine and transmission, respectively, based on engine speed. Engine speed may be determined based on the crankshaft position signal and a given tooth profile of the crankshaft position sensor. The actual tooth profile of the crankshaft position sensor may differ from the given tooth profil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D45/00
CPCF02D41/0097F02D41/1498F02D2041/1432F02D2200/1015
Inventor J.C.扎瓦拉朱拉多L.C.沃克
Owner GM GLOBAL TECH OPERATIONS LLC
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