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Method for testing actuating phase of variable valve timing (VVT) mechanism of engine pedestal benchmarking test

An engine bench, test method technology, used in engine testing, machine/structural component testing, measuring devices, etc.

Inactive Publication Date: 2011-11-23
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main problem to be solved by the present invention is to design a simple test method to judge whether the VVT ​​mechanism of the engine is actuated and its operation phase in view of the fact that there is no easy method to test the actuation phase of the VVT ​​mechanism of the engine bench model. The value of the moving phase

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  • Method for testing actuating phase of variable valve timing (VVT) mechanism of engine pedestal benchmarking test
  • Method for testing actuating phase of variable valve timing (VVT) mechanism of engine pedestal benchmarking test

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Embodiment Construction

[0022] Detect whether the VVT ​​mechanism of a VVT engine used for benchmarking test is actuated, and measure its phase change. The implementation steps include:

[0023] a. Install the VVT ​​engine on the engine test bench, power on the engine, and use a multimeter to judge the signal lines of the crankshaft position sensor and the camshaft position sensor;

[0024] b. Lead out the signal line, connect the signal line of the camshaft position sensor on the engine 1 to the oscilloscope with the thin wire 2; then connect one end of the thin wire 3 to the engine body, and connect the other end of the thin wire 3 to the oscilloscope , the thin wire 3 is equivalent to the ground wire of the signal wire of the camshaft position sensor;

[0025] c. Before the VVT ​​engine is running, unplug the wiring harness terminal that drives the OCV valve of the VVT ​​mechanism of the engine;

[0026] d. Start the engine, let the engine run at idle speed, use the oscilloscope to detect the sig...

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Abstract

The invention relates to a method for testing actuating phase of a variable valve timing (VVT) mechanism of an engine pedestal benchmarking test. In the method, a signal of a crankshaft position sensor and a signal of a camshaft position sensor are acquired by an oscilloscope according to the position relationship between a VVT engine crankshaft and a camshaft; the waveform positions of both signals are displayed on the oscilloscope; and the waveform position of the crankshaft position sensor signal is not changed, so whether the VVT mechanism acts or not can be judged according to the relative position between the waveform of the camshaft position sensor signal and the waveform of the crankshaft position sensor signal. Equipment utilized in the test method is simple; the calculation method is simple and convenient; the test method is accurate in measurement; and the requirement of the engine pedestal benchmarking test on the actuating phase of the VVT mechanism can be met.

Description

technical field [0001] The invention belongs to the field of automobile testing, and in particular relates to a testing method for the actuation phase of a VVT mechanism in an engine bench benchmarking test. Background technique [0002] In the VVT ​​engine bench benchmarking test, since the diagnostic instrument of the benchmarking model cannot be obtained, it is impossible to judge whether the VVT ​​mechanism of this model is actuated and the phase of the actuation, and there is no better way to judge . [0003] As mentioned above, there is currently no easy way to test the actuation phase of the VVT ​​mechanism. Contents of the invention [0004] The main problem to be solved by the present invention is to design a simple test method to judge whether the VVT ​​mechanism of the engine is actuated and its operation phase in view of the fact that there is no easy method to test the actuation phase of the VVT ​​mechanism of the engine bench model. The value of the moving ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00
Inventor 潘小亮饶利东卢方军张笛
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD