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Systems and methods for deactivating and reactivating cylinders based on estimated trapped air mass

A technology of air quality and air collection, applied in electrical control, electric spark ignition controller, engine components, etc., can solve problems such as increasing engine torque output

Active Publication Date: 2016-08-10
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Increasing the amount of air and fuel delivered to the cylinders increases the torque output of the engine

Method used

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  • Systems and methods for deactivating and reactivating cylinders based on estimated trapped air mass
  • Systems and methods for deactivating and reactivating cylinders based on estimated trapped air mass
  • Systems and methods for deactivating and reactivating cylinders based on estimated trapped air mass

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Embodiment Construction

[0043] The engine control system may deactivate cylinders of the engine after the air / fuel mixture is combusted within the cylinders and before exhaust gases are expelled from the cylinders. Therefore, all the exhaust gas and small amount of unburned fuel resulting from combustion are trapped in the cylinder. The trapped gas may be referred to as a complete combustion charge. As the piston within the cylinder moves between its topmost position, known as top dead center (TDC), and its bottommost position, known as bottom dead center (BDC), the trapped gas acts as a spring effect.

[0044] The engine uses energy as the piston compresses trapped gases as the piston moves from BDC to TDC. As the piston moves from TDC to BDC, the engine regains some energy due to trapped gases biasing the piston towards BDC. However, the engine does not regain all of its energy, which results in pumping losses that negatively impact fuel economy. In addition, the high pressure of the trapped ga...

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Abstract

The present invention relates to systems and methods for deactivating and reactivating cylinders based on estimated trapped air mass. A system according to principles of the present disclosure includes a cylinder activation module and a spark control module. The cylinder activation module selectively deactivates and reactivates cylinders of the engine. The cylinder activation module deactivates the cylinders after intake air is drawn into the cylinders and before fuel is injected into the cylinders or sparks are generated in the cylinders. When the cylinder is reactivated, the spark control module selectively controls the spark plug to generate spark within the cylinder before the cylinder's intake or exhaust valve opens.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application Serial No. 61 / 693,023, filed August 24, 2012. The disclosures of the aforementioned applications are incorporated herein by reference in their entirety. [0003] This application is related to U.S. Patent Application Serial No. 13 / 798,351, filed March 13, 2013, U.S. Patent Application Serial No. 13 / 798,586, filed March 13, 2013, U.S. Patent Application Serial No. 13, 2013 Serial No. 13 / 798,590, U.S. Patent Application Serial No. 13 / 798,536, filed March 13, 2013, U.S. Patent Application Serial No. 13 / 798,435, filed March 13, 2013, U.S. Patent Application Serial No. 13 / 798,435, filed March 13, 2013 Serial No. 13 / 798,471, U.S. Patent Application Serial No. 13 / 798,737, filed March 13, 2013, U.S. Patent Application Serial No. 13 / 798,701, filed March 13, 2013, U.S. Patent Application Serial No. 13 / 798,701, filed March 13, 2013 Application Serial No. 13 / 798,518, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00F02D17/02F02P9/00
CPCF02D41/0087F02D35/024F02D37/02F02D2041/0012
Inventor A.B.雷尔
Owner GM GLOBAL TECH OPERATIONS LLC
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