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Fuel quality indication for adaptive transmission control

A transmission, adaptive technology, applied in the direction of engine control, transmission control, elements with teeth, etc., can solve problems such as delay

Inactive Publication Date: 2008-10-01
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although powertrains manufactured today may include adaptive transmission shift controls to improve shift quality, such controls tend to adapt to changes in fuel quality with a delay

Method used

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  • Fuel quality indication for adaptive transmission control
  • Fuel quality indication for adaptive transmission control
  • Fuel quality indication for adaptive transmission control

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Embodiment Construction

[0012] The following descriptions of various specific embodiments of the present invention are only illustrative in fact, and by no means limit the present invention and its application or operation. For purposes of clarity, the same reference numbers will be used to refer to the same elements in the drawings. As used herein, the terms module and / or device refer to application-specific integrated circuits (ASICs), electronic circuits, processors (shared, dedicated, or clustered) and memories that execute one or more software or firmware programs, combinational logic circuits , and / or other suitable elements providing the above functions.

[0013] Referring to FIG. 1 , a vehicle having adaptive transmission shift control according to one embodiment of the present invention is indicated at 20 . The vehicle 20 may be fueled with gasoline and / or with various percentages of ethanol. Fuel is delivered from fuel tank 26 to engine 22 through a plurality of fuel injectors 28 . The o...

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Abstract

A control system and method for adaptively controlling transmission ratio shifting in an electronically controlled transmission. A refueling event is detected. After the detected refueling event, fuel consumption is monitored for a predetermined period during which a change in composition of fuel to the engine reaches or approaches a steady state. During the period, the rate of adapting transmission shift controls is modified to respond quicker to the change in shift characteristics induced by differences in torque produced by the engine. Implementing this method can improve transmission shift quality while the quality of fuel reaching an engine is in transition.

Description

technical field [0001] This invention relates generally to powertrain control systems and, more particularly, to adaptive shift control of electronically controlled transmissions in response to changes in fuel quality. Background technique [0002] When a driver refuels a motor vehicle, the composition of the fuel (also referred to as fuel mass) within the fuel tank may change significantly due to the addition of new fuel. For example, ethanol and / or a gasoline solution of ethanol may be introduced into a fuel tank containing gasoline. Fuel quality can affect the torque producing capability of an internal combustion engine. The torque output of the engine after a refueling event may be positively or negatively affected by as much as seven percent. Although powertrains manufactured today may include adaptive transmission shift controls to improve shift quality, such controls tend to adapt with delay in fuel quality changes. Contents of the invention [0003] The present ...

Claims

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Application Information

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IPC IPC(8): B60W10/10B60W10/06
CPCF16H59/34Y10T477/65B60W10/06F16H2306/00B60W10/10F16H61/0213Y10T477/693B60W30/188
Inventor R·B·耶斯J·A·塞尔J·E·马拉诺J·R·费尔德约
Owner GM GLOBAL TECH OPERATIONS LLC