Variable valve timing distribution regulating device and method for improving mechanical property of variable valve timing distribution regulating device

Abstract

The invention provides a variable valve timing distribution regulating device, which is applied in the technical field of variable valve timing of engines. Oxidation coverage membranes (5) formed by electrochemical surface treatment are arranged on the surfaces of a stator (1) and a rotor (2). The invention also relates to a method for improving the mechanical property of the variable valve timing distribution regulating device. The method comprises the following steps of: performing electrochemical surface treatment on the stator (1) and the rotor (2); and forming the oxidation coverage membranes (5) capable of improving the surface hardness and the abrasion resistance of the stator (1) and the rotor (2) on the surfaces of the stator (1) and the rotor (2) respectively. By the device and the method, the surface hardness and the abrasion resistance of the stator and the rotor are improved, so that abrasion influences caused by rotation friction are reduced to the minimum extent, and crushing is prevented; and simultaneously, the heat resistance and the corrosion resistance of parts are improved, so that the service life of the device are greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of engine variable valve timing, and more particularly, relates to a variable valve timing valve adjustment device, and also relates to a method for improving the mechanical performance of the variable valve timing valve adjustment device. Methods. Background technique [0002] Engine variable valve timing technology (VVT, Variable Valve Timing) is a new technology that has been gradually applied to modern cars in recent years. The engine adopts variable valve timing technology to increase the intake charge of the engine, so that the intake charge coefficient increases, and the torque and power of the engine can be further improved. Since the components in the variable valve timing valve adjustment mechanism are provided with a relatively rotating structure, the surfaces that are in contact with each other during the relative rotational motion are prone to rotational wear and even crush. This will cause th...

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Problems solved by technology

These rotations are likely to cause wear and tear between the parts due to rotational friction, which accelerates the damage time of the adjustment device and shortens its life; at the same time, the worn impurities pollute the working oil, which easily causes the inability to fully realize its working performance.

In particular, parts processed from light alloy materials (such as the rotor and stator in the variable valve timing air distribution adjustment device in the above Chinese patent application No. 200820114197.1) are not strong enough to withstand high-speed relative rotation. It is prone to oil leakage, wear, crushing and other phenomena, which may lead to the failure of the entire gas distribution adjustment device and greatly affect the service life

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