Valve lift measuring device and method

Abstract

The invention relates to a valve lift measuring device. The device comprises a magnetic gauge stand, a support fixedly connected to the upper surface of the magnetic stand, and a dial gauge and a probe connected to a support bar via a universal joint; the magnetic gauge stand is placed on a support block which is fixedly connected to the top surface to a cylinder cap via a bolt; and the device is characterized by also comprising a dial in coaxial connection with the front end of a crankshaft via a bolt and a pointer connected to a crankcase via a bolt, the pointer corresponds to the edge of the dial, and the indication direction of the pointer penetrates the center of the dial. The invention also provides a valve lift measuring method. According to the invention, pressure without machine oil can be established in the measuring process, a hydraulic column is in a non-work state, a gap of a gas distribution mechanism cannot be eliminated, the valve lift can be measured under the condition that the position of a rocking arm of a rolling bearing is uncertain, the mutual relation between the valve lift and the rotation angle of the crankshaft can be also measured, installation and debugging are rapid, the measuring precision is high, and rapid verification is provided for engine development.

Description

technical field [0001] The invention relates to an automobile engine, in particular to a valve lift measuring device and a measuring method, which are used for engines with hydraulic tappets and rolling bearing rocker arms. Background technique [0002] As a major means of transportation, automobiles are increasingly popular and growing, but automobile noise has become a major source of environmental pollution, which not only pollutes the riding environment of the occupants in the car, but also causes serious pollution to the surrounding environment of the automobile's operating range, affecting people's health. Normal work, study and life. Against the background of increasing car ownership, increasing awareness of environmental protection, and increasing requirements for comprehensive performance indicators of cars, countries around the world have also formulated strict standards and regulations for car noise control, and major car manufacturers have also invested in A lot...

AI Technical Summary

Problems solved by technology

[0005] The invention aims at the problems existing in the valve lift measurement of engines with hydraulic tappets and rolling bearing rocker arms, and provides a valve lift measuring device, which can not only build up no oil pressure during the measurement process, and the hydraulic tappets are in a non-working state. Air mechanism clearance cannot be eliminated, the valve lift can be measured under the condition that the position of the rolling bearing rocker arm is uncertain, and the relationship between the valve lift and the crank angle can also be measured. The installation and debugging are quick and the measurement accuracy is high, which is convenient for rapid engine development. verify

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