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Reverse engine rotation detection system

A technology for detecting systems and engines, applied to measuring devices, engine components, combustion engines, etc., can solve problems such as bearing wear, damaged hoses and sensors, intake manifold damage, etc.

Inactive Publication Date: 2009-03-04
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If further reverse rotation occurs, the pressure can increase further causing damage to the intake manifold
[0006] In addition to causing damage to the intake manifold, reverse rotation of the engine can cause other problems such as excessive bearing wear and can damage gaskets, hoses and sensors connected to the intake manifold

Method used

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  • Reverse engine rotation detection system
  • Reverse engine rotation detection system
  • Reverse engine rotation detection system

Examples

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Embodiment Construction

[0015] The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention and its application or uses. For the sake of clarity, the same reference numbers are used to designate the same elements in the drawings. The term "module" as used herein refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and memory, a combinational logic circuit, and / or Other suitable components that provide the described functionality.

[0016] Referring now to FIG. 1 , an engine propulsion system 10 includes an internal combustion engine 12 that combusts an air and fuel mixture to generate drive torque. Air is drawn into an intake manifold 14 through a throttle valve 16 . Throttle valve 16 is electronically controlled to regulate mass air flow into intake manifold 14 . Air in the intake manifold 14 is distributed among the cylinders 18 . Although four cylinders 18...

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PUM

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Abstract

The invention relates to a reverse engine rotation detecting system, especially a method of determining reverse engine rotation which includes calculating a ratio of on time to off time of a camshaft position signal during camshaft rotation, determining whether a predetermined camshaft state has been entered based on said ratio, comparing the most recently determined camshaft state with a predetermined camshaft state pattern for forward engine rotation and determining a engine rotation direction based on said comparison.

Description

[0001] Cross References to Related Applications [0001] This application claims the benefit of US Provisional Application No. 60 / 966,865, filed August 30, 2007. The disclosure of the aforementioned application is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to internal combustion engines, and more particularly, to systems and methods for detecting reverse engine rotation. Background technique [0003] Internal combustion engines typically operate in four modes; intake mode, compression mode, combustion mode and exhaust mode. During engine reverse rotation, the engine cycles are performed in reverse order so that the compression mode is followed by the intake mode. For example, when a stopped engine starts to start again, one of the engine's cylinders may be in compression mode at the moment of stopping. Compression pressure in the cylinder can in turn push the piston toward bottom dead center (BDC). This counte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22
CPCF02D41/0097F02N2250/04F02D41/22Y02T10/40G01P13/045F02N11/10F02D2250/06
Inventor J·A·雅各布斯K·T·乔泽富维奇
Owner GM GLOBAL TECH OPERATIONS LLC