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A fault detection method and detection device for an engine auxiliary braking system

An auxiliary braking and fault detection technology, applied in the automotive field, can solve the problems of high labor cost and time cost, and achieve the effect of accurate fault detection

Active Publication Date: 2018-04-13
BEIJING FOTON CUMMINS ENGINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fault detection method and detection device for an engine auxiliary braking system, which can overcome the defects of high manpower and time costs in traditional fault detection methods

Method used

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  • A fault detection method and detection device for an engine auxiliary braking system
  • A fault detection method and detection device for an engine auxiliary braking system
  • A fault detection method and detection device for an engine auxiliary braking system

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Experimental program
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Embodiment

[0045] In this embodiment, the engine used for the brake failure test of the engine auxiliary braking system is an in-line 6-cylinder, the auxiliary braking method is compression braking, and there are 3 sets of compression braking rocker arms, and each two cylinders share a rocker arm base , of which the rocker arms of 1 and 2 cylinders are the first group, the rocker arms of 3 and 4 cylinders are the second group, and the rocker arms of 5 and 6 cylinders are the third group. The rated torque of the engine is 1310Nm when the maximum engine speed is 1900 rpm and the throttle is 100%.

[0046] Firstly, the reliability test of the compression braking performance of the engine auxiliary braking system is carried out. First, the engine control module 301 makes the engine run at a speed of 1900 rpm and the throttle of the engine is 100%; then the engine control module 301 can receive a braking control command from a test bench and then start the engine auxiliary braking system Com...

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Abstract

The invention relates to the field of automobiles, and discloses a fault detection method and a detection device for an engine auxiliary braking system. The fault detection method includes: running the engine at a predetermined speed (S1); starting the engine auxiliary braking system (S2); measuring the torque of the engine in the case of engine auxiliary braking and / or the engine auxiliary braking system ending assistance the torque of the engine when braking and the engine is again running at the predetermined speed (S3); if the absolute value of the measured torque of the engine is less than the nominal torque when the engine is running at the predetermined speed, Then the engine auxiliary braking system fails (S4).

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a fault detection method and detection device for an engine auxiliary braking system. Background technique [0002] In the engine auxiliary braking system, although the structure of each type of engine retarder is different, and the specific working process is also different, but the main working principle is the same, such as figure 1 As shown (wherein, the box part is the adjustment part to the normal working process of the engine): first, the intake valve 1 is opened during the intake stroke, the piston 4 descends, and fresh air enters the cylinder 3; then in the compression stroke, the piston 4 ascends, Compress the gas in the cylinder 3; the next process of releasing the high-pressure gas is unique to the engine auxiliary braking work, that is, the exhaust valve 2 is opened at a certain angle before the piston 4 reaches the compression top dead center, so that the cylinder 3 is co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
Inventor 王巧季凯王玺陈祎张星
Owner BEIJING FOTON CUMMINS ENGINE