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Turbine offset matching control system

A technology for controlling system and turbine speed, applied in electrical control, engine control, transmission control, etc., which can solve problems affecting fuel saving, etc.

Inactive Publication Date: 2007-12-26
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Accordingly, operation of the engine in DFCO mode is delayed or prevented, and therefore, fuel economy is affected

Method used

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  • Turbine offset matching control system
  • Turbine offset matching control system
  • Turbine offset matching control system

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Embodiment Construction

[0014] The following description is merely exemplary in nature and is not intended to limit the specification, application, or use. It should be understood that corresponding symbols indicate like or corresponding parts and features throughout the drawings. As used herein, the term module refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or grouped) and memory, a combination of logic that executes one or more software or firmware programs circuits, and / or other suitable components that provide the described functionality.

[0015] Referring to FIG. 1 , a vehicle 10 includes an engine 12 that drives a transmission 14 . Air flows into the engine 12 through the throttle valve 16 . The fuel is combined with the air to be combusted within the cylinders 18 . The combustion process reciprocates a piston (not shown) within cylinder 18 . The pistons rotationally drive crankshaft 22 to generate drive torque. Engine 1...

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Abstract

A control system for enabling an engine to operate in a deceleration fuel cutoff (DFCO) mode is provided. The system includes: an enable module that selectively enables a DFCO mode based on an accelerator pedal position; and an engine speed module that regulates engine speed based on turbine speed during a predetermined time period after the DFCO mode is enabled.

Description

technical field [0001] The present description relates to methods and systems for controlling an engine, and more particularly to methods and systems for enabling a deceleration fuel cutoff mode of operation of the engine. Background technique [0002] The statements in this section merely provide background information related to this specification and may not constitute prior art. [0003] Automatic transmissions transfer engine torque from the engine to the transmission using fluid clutches known as torque converters. The torque converter is operated by hydraulic pressure provided by pressurized fluid from the automatic transmission. A torque converter scales engine torque and channels it through the transmission. [0004] A conventional torque converter includes a sealed cavity filled with hydraulic fluid. The chamber contains a pump (or impeller) driven by the engine, a turbine connected to the output shaft and a stator providing torque boost. When the impeller spee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/02F02D41/12
CPCF16H63/50F02D41/0205F02D2200/602Y10T477/735F16H2306/54Y10T477/675Y10T477/79F02D41/022F02D41/123F16H61/143
Inventor G·塔梅B·P·巴塔赖W·L·阿尔德里奇三世J·L·沃尔兴
Owner GM GLOBAL TECH OPERATIONS LLC