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System and method for preventing misfire during engine start

A technology of engine starting and engine, which is applied in the direction of engine ignition, engine starting, engine electric motor starting, etc.

Active Publication Date: 2016-08-17
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional misfire prevention systems are not as effective at preventing engine misfires as desired

Method used

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  • System and method for preventing misfire during engine start
  • System and method for preventing misfire during engine start
  • System and method for preventing misfire during engine start

Examples

Experimental program
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Embodiment Construction

[0037] The engine control system can automatically shut down the engine when the engine is idling to reduce fuel consumption and emissions. The engine control system can automatically shut down the engine when the driver depresses the brake pedal and the vehicle speed is zero. The engine control system can automatically restart the engine when the driver releases the brake pedal after an automatic engine shutdown.

[0038] During engine shutdown, the direction of rotation of the crankshaft in the engine may reverse before the crankshaft stalls. In turn, a piston coupled to the crankshaft may stop near top dead center (TDC) before the movement of the piston is reversed. The reversal of piston movement during engine shutdown may be referred to as rock back. When the piston swings back, the piston can draw exhaust gas into the cylinder where the piston is placed. Exhaust gases can also be drawn into the engine's intake manifold due to the pressure differential between the inta...

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PUM

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Abstract

The present invention relates to systems and methods for preventing misfire during engine starting. Specifically, a system in accordance with the principles of the present invention includes a stop-start module and a throttle control module. The stop-start module stops the engine when the driver depresses the brake pedal while the ignition is on and the engine is idling. A throttle control module selectively opens a throttle valve when fuel injection into the engine ceases during ignition on based on engine speed and manifold pressure within the intake manifold. When the driver releases the brake pedal, the stop-start module starts the engine.

Description

technical field [0001] The present invention relates to internal combustion engines, and more particularly, to systems and methods for preventing misfire during engine starting. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the currently named inventors (to the extent described in this Background section) and aspects of the description that did not constitute prior art at the time of filing the application cannot be admitted, either expressly or by implication, to be prior art to the present invention. [0003] Internal combustion engines combust an air and fuel mixture in cylinders to drive pistons, which produce drive torque. Air flow into the engine is regulated via a throttle valve. More specifically, the throttle adjusts throttle area, which increases or decreases air flow into the engine. When the throttle valve area increases, the air flow into the engin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D29/02
CPCF02D41/0002F02D41/009F02D41/042F02D2200/0406F02N11/0822F02N2200/023F02N2200/024F02N2200/0801F02N2200/102F02N2200/122F02N2250/04F02P5/1506Y02T10/40
Inventor H.G.桑托索R.D.沙夫托J.R.于尔吉尔
Owner GM GLOBAL TECH OPERATIONS LLC