Control oil way of variable valve timing device

Abstract

The invention provides a control oil way of a variable valve timing device; oil is guided to a mounting hole of an engine oil control valve arranged on a front enclosure body from a main oil duct of a cylinder cover, and then is distributed into an entrance angle oil way and an delay angle oil way by the engine oil control valve, wherein the entrance angle oil way and the delay angle oil way sequentially pass through the cylinder cover, a cam shaft bearing cover, a cam shaft bearing bushing through hole and a cam shaft and then reach the variable valve timing device; and an oil return channel of the mounting hole of the engine oil control valve is communicated with an oil chamber of an engine. The control oil way is arranged in a part body so as to be compact in structure; the oil way is mainly molded by casting and processing through a straight hole machine, so that the technique is easily realized; the engine oil control valve is arranged on the front enclosure body, so that the structure is simple, and the structural design of the cylinder cover or a cylinder cover enclosure can be simplified; and due to the application of a cam shaft bearing bushing, the influence for the arrangement of the oil way caused by the not enough width of the surface of a bearing can be skillfully avoided, and the longitudinal arrangement size of the cylinder cover can be reduced.

Description

technical field [0001] The invention relates to a vehicle engine control device, in particular to a control oil circuit of a variable valve timing device. Background technique [0002] Usually, the control oil circuit of the variable valve timing device is: lead the high-pressure oil from the bottom surface of the cylinder head to the oil control valve arranged on both sides of the front end of the cylinder head or on the camshaft bearing cover, and then carry out the oil circuit of the advance angle and the oil circuit of the delay angle. The distribution of high-pressure oil is introduced or drawn out through the camshaft to realize the action of the variable valve timing device. [0003] With the increasingly stringent national regulations on fuel consumption and emissions, the upgrade or development of engines is urgent, and variable valve timing technology has become the standard configuration of engines. Usually, the variable valve timing device is used in high-end ca...

AI Technical Summary

Problems solved by technology

For small-displacement engines, due to their compact structure, it is bound to cause difficulties in the layout of the variable valve timing device control oil circuit, and the status of parts changes greatly, and the versatility is low, resulting in increased development costs

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