Detection system for determining valve opening and closing moments

A technology for detecting system and closing time, applied in the direction of internal combustion engine testing, etc., can solve problems such as inaccurate measurement results, differences in top dead center positions, failure to consider inertial effects and thermal expansion effects, etc., to achieve accurate measurement, avoid signal distortion, and ensure The effect of measurement accuracy

Pending Publication Date: 2020-05-22
ANHUI HUALING AUTOMOBILE
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Problems solved by technology

[0003] The current measurement method is mainly to measure the opening and closing moments of the engine valve under static conditions, specifically through the top dead center mark on the side of the flywheel and the mark on the camshaft, or the height dial indicator to determine the top dead center of the piston, and the graduation is installed on the flywheel Then use the height dial indicator to observe the opening and closing position of the valve, and the opening and closing time of the valve can be obtained through the dial. The current measurement method has great shortcomings. First, the existing measurement metho

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  • Detection system for determining valve opening and closing moments

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Embodiment Construction

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0019] Please refer to figure 1 , figure 1 It is a schematic diagram of the overall structure of a specific implementation provided by the present invention.

[0020] In a specific embodiment provided by the present invention, it mainly includes a cylinder pressure sensor 2 and a displacement sensor 3 installed on the cylinder head of the engine 1, an electronic goniometer 4 installed on the front end of the crankshaft of the engine 1, an...

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Abstract

The invention discloses a detection system for determining valve opening and closing moments. The detection system comprises a cylinder pressure sensor and a displacement sensor which are used for being installed on a cylinder cover of an engine, an electronic corner mark instrument used for being installed at the front end of a crankshaft of the engine, and a combustion analyzer connected with the cylinder pressure sensor, the displacement sensor and the electronic corner mark instrument. According to the detection system for measuring opening and closing moments of an engine valve in the invention, the non-contact eddy current displacement sensor is matched with the electronic angle marking instrument at the front end of the crankshaft to collect the valve lift of the engine in the ignition state, the valve opening and closing moment of the engine in the ignition state is accurately measured, and the accuracy of valve opening and closing measurement of the engine in the ignition state is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of automobile engine testing, in particular to a detection system for determining the opening and closing time of a valve. Background technique [0002] The engine plays an extremely important role in the industrial field. When the engine is ignited, due to the inertial effect and thermal expansion of the valve train parts running at high speed, the opening and closing time of the engine valve is different from that under static conditions, and under different working conditions. The engine valve mechanism is compact, the valve opening and closing frequency is high, and the high temperature and high pressure environment of the valve is complicated and changeable. Therefore, it is difficult to measure the valve opening and closing time under the ignition state of the engine. Therefore, in order to ensure the intake of the engine cylinder Sufficient and thorough exhaust, the engine valve opening and closing time ne...

Claims

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Application Information

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IPC IPC(8): G01M15/05
CPCG01M15/05
Inventor 王小龙王奔方飞沈庭宇周希虎杨鹏
Owner ANHUI HUALING AUTOMOBILE
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