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Engine combined brake control method

A technology of engine braking and combined braking, which is applied in the direction of engine control, engine components, machines/engines, etc., can solve problems such as the complex structure of the engine braking system, achieve braking power optimization, simplify the braking system, and reduce costs Effect

Inactive Publication Date: 2015-03-11
SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a combined engine braking control method, which solves the problem of engine braking using variable exhaust butterfly valve brakes or pressure relief exhaust butterfly valves in the prior art. Technical issues with complex system structures

Method used

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  • Engine combined brake control method
  • Engine combined brake control method
  • Engine combined brake control method

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Embodiment 1

[0023] The engine combined braking control method of the present invention includes a step of controlling the action process of the engine brake and a step of controlling the action process of the exhaust butterfly valve brake, the engine brake is arranged on an engine, and the exhaust butterfly valve brake It is arranged in the exhaust system of the engine, wherein, in the step of controlling the action process of the engine brake and the step of controlling the action process of the exhaust butterfly valve brake, the braking speed of the engine is detected, and at the same time Compare the braking speed of the engine with a switching braking speed. When the braking speed of the engine is lower than the switching braking speed, the engine brake and the exhaust butterfly valve brake are activated. When the braking speed of the engine is higher than or When equal to switching brake speed, activate the engine brake and keep the exhaust butterfly valve brake closed.

[0024] Furt...

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Abstract

A combined braking control method for an engine includes a step of controlling the operating process of an engine brake and a step of controlling the operating process of an exhaust butterfly valve brake. The engine brake is provided on the engine and the exhaust butterfly valve brake is provided in an exhaust system of the engine. The brake speed of the engine is detected and compared with a switching brake speed (740). When the brake speed of the engine is lower than the switching brake speed, both of the exhaust butterfly valve brake and the engine brake are actuated (760). When the brake speed of the engine is higher than the switching brake speed, the engine brake is actuated and the exhaust butterfly valve brake is kept closed (750). An optimization for the braking power and a safe operation for the engine are achieved by the braking control method. The exhaust back pressure of the engine is controlled without utilizing a complicate and expensive variable type or pressure release type exhaust butterfly valve brake, which makes the braking system simplified and the cost reduced.

Description

Technical field: [0001] The invention relates to the field of automobiles, in particular to the braking control of an automobile engine, in particular to an engine combined braking control method. Background technique: [0002] In the prior art, the internal combustion engine is often used as a braking means, which is realized by temporarily converting the engine into a compressor. This transition cuts off fuel and opens the exhaust valve at or near the end of the engine piston's compression stroke, allowing the compressed gas (air during braking) to be released. The energy absorbed by the engine during the compression stroke cannot Returns to the engine piston during the subsequent expansion stroke, but is dissipated through the engine's exhaust and cooling system. The end result is effective engine braking that slows the vehicle. [0003] Engine braking is divided into two categories: compression release engine braking and deflated engine braking. [0004] A conventiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D13/02F02D9/06F01L13/06
CPCF02D9/06F02D13/04
Inventor 杨洲
Owner SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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