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Device and method for measuring dynamic rigidity of valve spring of valve mechanism

A technology of valve spring and dynamic stiffness, which is applied in the field of vehicle detection, can solve problems such as inconsistency of results, and achieve the effects of low experimental cost, improved experimental efficiency, and simple structure

Active Publication Date: 2012-08-01
HANGZHOU DIANZI UNIV
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AI Technical Summary

Problems solved by technology

However, these research methods ignore the influence of surrounding components on the spring, which may cause the obtained results to be inconsistent with the actual

Method used

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  • Device and method for measuring dynamic rigidity of valve spring of valve mechanism
  • Device and method for measuring dynamic rigidity of valve spring of valve mechanism
  • Device and method for measuring dynamic rigidity of valve spring of valve mechanism

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Experimental program
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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the valve spring dynamic stiffness measurement system of the valve mechanism includes: control cabinet 1, motor 2, lubricating oil tank 4, encoder 5, acceleration sensor 6, laser displacement sensor 7, strain gauge 8, tachometer 9, charge amplifier 10, Dynamic strain gauge 11, data acquisition card 12, upper computer 13.

[0021] The control cabinet 1 is connected with the signal of the motor 2, and the motor 2 drives the toothed pulley on the camshaft of the valve mechanism 3 to rotate. The lubricating oil tank 4 is connected with the valve mechanism 3 to provide lubricating oil for the valve mechanism 3, and the lubricating oil flows through the funnel Back lubricating oil tank 4; Encoder 5 is installed on the camshaft to collect top dead center signal and rotation angle signal; Acceleration sensor 6 is bonded on the top surface of...

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Abstract

The invention discloses a device and a method for measuring dynamic rigidity of a valve spring of a valve mechanism. A control cabinet is in signal connection with a motor, the motor is used for driving a toothed belt pulley on a camshaft of the valve mechanism to rotate, a coder is mounted on the camshaft, an acceleration sensor is adhered on the top surface of a valve, an output end of the acceleration sensor is connected with a charge amplifier, a laser displacement sensor is positioned above a rocker valve end and arranged opposite to the rocker valve end, a strain foil is adhered at a rocker valve end, an output end of the strain foil is connected with a dynamic strain meter, signals outputted by the coder, the charger amplifier, the laser displacement sensor and the dynamic stain meter are inputted into an upper computer through a data acquisition card, and an output end of the coder is connected with a revolution meter. The device is simple in structure, accurate in experimental results, low in cost and convenient in long-term use.

Description

technical field [0001] The invention belongs to the technical field of vehicle detection, and relates to a device and method for measuring the dynamic stiffness of a valve spring of a valve mechanism. Background technique [0002] The valve spring is one of the important components of the valve train, and the dynamic stiffness of the spring directly affects the performance of the valve train. If the dynamic stiffness is too small, the valve cannot be seated in time and fit tightly, causing the valve to jump and damage its sealing; if the dynamic stiffness is too large, the impact on the valve seat ring and the friction on the cam will be increased when the valve is closed. This affects the durability of the component. Its damage will affect the engine power, torque, fuel consumption and abnormal noise in the slightest, and cause faults such as valve fracture in severe cases. Therefore, it is necessary to measure the dynamic stiffness of the valve spring of the valve tr...

Claims

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Application Information

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IPC IPC(8): G01M13/00
Inventor 刘忠民颜金龙凌俊华张建庭
Owner HANGZHOU DIANZI UNIV
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