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Fuel-cut manifold absolute pressure control

A fuel cut-off, intake manifold technology, applied in the direction of electrical control, fuel injection control, control devices, etc., can solve the problems of absolute pressure reduction, efficiency reduction, loss, etc.

Active Publication Date: 2008-08-20
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result of engine backdriving, the intake manifold absolute pressure (MAP) of the engine intake manifold is significantly reduced, resulting in reduced efficiency and other losses

Method used

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  • Fuel-cut manifold absolute pressure control
  • Fuel-cut manifold absolute pressure control
  • Fuel-cut manifold absolute pressure control

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Embodiment Construction

[0014] The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application or uses. For purposes of clarity, the same reference numbers will be used in the drawings to refer to the same elements. As used herein, the term module refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or clustered) and memory, a combinational logic circuit, that executes one or more software or firmware programs, Or other suitable components that provide the described functions.

[0015] As used herein, fuel cutoff operation (FCO) mode refers to operation during which fuel supply to the engine is cut off, such as in deceleration fuel cutoff (DFCO), engine electric drive, or other FCO modes.

[0016] Referring now to FIG. 1 , a typical hybrid vehicle 10 includes an engine 12 and an electric machine 14 that drive a transmission 16 . More specifically, the...

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Abstract

A method of regulating throttle opening of an engine in a hybrid electric vehicle system includes initiating a fuel cut mode of operation of the engine, monitoring engine speed during the fuel cut mode of operation, and during the fuel cut mode, based on engine Speed ​​adjusts throttle opening to maintain the engine's intake manifold absolute pressure (MAP) above a threshold MAP.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application Serial No. 60 / 840389, filed August 25, 2006, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to hybrid vehicles, and more particularly to regulation of the engine of a hybrid vehicle in a fuel cutoff mode which occurs, for example, during deceleration fuel cutoff (DFCO) or motoring of the engine. Background technique [0004] Hybrid vehicles are powered by multiple power plants, including but not limited to internal combustion engines and electric machines. The electric machine works as a motor / generator. In generator mode, the electric machine is driven by the engine to generate electrical energy for powering electrical loads or charging batteries. In motor mode, the electric machine supplements the engine, providing drive torque to drive the vehicle driveline. [00...

Claims

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Application Information

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IPC IPC(8): F02D13/02F02D41/12
CPCB60L2240/441B60W10/06B60W20/00B60W2510/0638B60W2510/0671B60W2540/10B60W2540/12F02D41/0005F02D41/123F02D2041/0012Y02T10/40B60W20/15B60W2710/0605
Inventor G·塔美J·L·沃森
Owner GM GLOBAL TECH OPERATIONS LLC
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