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Exhaust brakes

A technology of exhaust braking and braking torque, applied in electrical control, exhaust device, exhaust treatment, etc., can solve problems such as poor effect

Active Publication Date: 2011-01-26
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, exhaust braking is less effective at low engine speeds

Method used

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Examples

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Embodiment Construction

[0033] The following description is merely exemplary in nature and is not intended to limit the disclosure, its application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts or features.

[0034] As used herein, the term "module" refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared processor, dedicated processor, or group processor) and memory, a combination of Logic circuits and / or other suitable components that provide the described functionality.

[0035] An exhaust brake control system according to the teachings of the present disclosure determines the adjusted volumetric flow rate after determining the desired volumetric flow rate based on the desired braking torque. The system adjusts the desired volumetric flow rate in response to changing operating conditions that result in an increase / decrease in exhaust gas temperature. The system e...

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PUM

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Abstract

An exhaust brake control system includes a braking torque estimation module that estimates a desired braking torque based on engine speed. A volume flow rate determination module determines a desired volume flow rate of an exhaust gas based on the desired braking torque. An adjustment module adjusts an actual volume flow rate to control actual braking torque based on the desired braking torque and a change in exhaust temperature.

Description

technical field [0001] The present disclosure relates to internal combustion engines, and more particularly to exhaust braking for internal combustion engines. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors, to the extent described in this Background section and to those described aspects which may not be prior art at the filing date, is neither expressly nor impliedly admitted to be relative to the present disclosure. language prior art. [0003] Exhaust braking can be used for vehicle braking in diesel engines. When the exhaust brake is activated, the exhaust path downstream of the engine is closed or reduced so that exhaust gas is compressed in the exhaust manifold, creating back pressure. With increased back pressure in the exhaust manifold, the load on the engine increases, thereby slowing the vehicle. The back pressure in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D9/06
CPCF02D9/06F02D41/187F02D23/00F02D41/0007F02D41/1446F01N9/002F02D41/1497F02D41/029Y02T10/144F01N3/023F02D41/123F02B37/24Y02T10/12
Inventor D·P·奎格利S·J·安德拉斯科
Owner GM GLOBAL TECH OPERATIONS LLC