Middle-set-type variable valve timing device and engine

Abstract

The invention belongs to the field of engines and in particular relates to a novel middle-set-type variable valve timing device and an engine. The novel middle-set-type variable valve timing device comprises a chain wheel, a cam shaft and a cam shaft phase regulator which is fixedly arranged at one end of the cam shaft and is fixedly connected with the chain wheel as well as an engine oil control valve fixed inside the phase regulator, wherein the phase regulator comprises a stator, a rotor and a shield plate, the stator, the rotor and the shield plate are matched to form more than two sealing cavities, a sealing arm is arranged on the rotor, the sealing arm uniformly separates the corresponding sealing cavity into an advancing cavity and a lagging cavity, two locking pins are arranged on the rotor, two arc-shaped grooves are moulded in the shield plate, and two locking parts prop against at the adjacent ends of the two arc-shaped grooves. The novel middle-set-type variable valve timing device has the advantages of simple structure, convenience in application, double locking, middle set of an engine oil control valve, high corresponding regulation speed, small oil pressure loss and high fuel economy.

Description

technical field [0001] The invention belongs to the field of engines, in particular to a novel middle-mounted variable valve timing device and an engine. Background technique [0002] The principle of engine variable valve timing technology (VVT, Variable Valve Timing) is to adjust the amount of intake (exhaust), valve opening and closing time, and angle according to the operating conditions of the engine. Make the amount of air entering the best, improve combustion efficiency. The advantage is that it saves fuel and has a large power-to-liter ratio. [0003] When the engine is under different working conditions, the ECU of the car will control the action of the OCV valve, and the reversing rod inside the OCV valve will move forward and backward to change the oil passage. If the oil passage is different, a certain amount of oil will be introduced into the cam phase adjuster. There are blades between the rotor and the stator of the phase adjuster, which divides a chamber in...

AI Technical Summary

Problems solved by technology

[0004] The existing variable valve timing devices are all single locking pins and one end is locked. When starting, the stator can only be moved and adjusted in the direction of the lag chamber, and cannot be adjusted in both directions, resulting in slow response speed when starting.

[0005] In addition, the existing variable valve timing device and the oil control valve are all set outside the phase regulator, which results in the OCV being far away from the oil chamber inside the phase regulator, resulting in a large loss of oil pressure in the oil passage during work, and a slower response speed

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