A method for assembling engine valve timing

Abstract

The invention discloses a valve timing assembly tooling and method of an engine. The valve timing assembly tooling comprises a cam shaft locating fixing assembly, a variable timing phaser locating assembly and a crank shaft locating fixing assembly, wherein the cam shaft locating fixing assembly comprises locating pin holes, a locating block, locating pins and a locating clamping plate; the variable timing phaser locating assembly comprises a substrate and two angle plates; a tooling locating shaft is arranged on the substrate; VVT locating pins are arranged on the angle plates; the crank shaft locating fixing assembly comprises a connecting plate; and crank shaft locating pins and a cylinder locating hinge pin are arranged on the connecting plate. According to the valve timing assembly tooling, the structure is simple, utilization is convenient, the problems that in the prior art, in a locating pin assembly timing technology, the locating pins are matched with the locating pin holes,the number of links of a valve timing dimension chain is large, and valve timing deviation is large are solved, and besides, the problem that in a non-locating pin assembly timing technology, when theVVT locating pins are screwed, matching surfaces of the VVT locating pins and a cam shaft relatively rotate is solved.

Description

technical field [0001] The invention belongs to the field of engine gas distribution phase assembly, and in particular relates to an engine gas distribution phase assembly method using tooling. Background technique [0002] With the continuous development of new engine technologies and increasingly stringent fuel consumption regulations, variable valve timing technology has been widely used in engines in view of its good performance in improving power and economy. [0003] Valve timing refers to the relationship between the corresponding camshaft rotation angle and crankshaft rotation angle when the intake and exhaust valves of the engine are opened and closed, and the corresponding crankshaft rotation angle when the intake and exhaust valves are opened and closed is the distribution phase angle. The variable valve timing technology is to select the appropriate valve timing by using the cooperation of the variable timing phaser and the solenoid valve according to the power r...

AI Technical Summary

Problems solved by technology

Compared with the tooling, the timing mark has a larger assembly error. There is no tooling between the crankshaft and the timing sprocket, and the camshaft and the camshaft gear. When the gear bolts are tightened, the relative position will move. Elastic, affecting the assembly accuracy of valve timing

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