Variable valve timing system, engine and vehicle

Abstract

The invention discloses a variable valve timing system, an engine and a vehicle. The variable valve timing system includes a driving wheel (1) and a (1) Relatively rotating camshaft (2), the variable valve timing system also includes a fixed block (3) fixed to the drive wheel (1) and can move along the The sliding block (4) that moves in the axial direction of the camshaft (2), the sliding block (4) of the drive wheel is connected with the camshaft (2), so that the sliding block (4) can move along the cam When the axial direction of the shaft (2) moves relative to the fixed block (3), it drives the camshaft (2) to rotate relative to the driving wheel (1); the engine includes the variable valve timing system; The vehicle includes the engine. The variable valve timing system of the present invention is simple in structure, easy to install, and has a large adjustment range.

Description

technical field [0001] The invention relates to the field of vehicle engineering, in particular to a variable valve timing system, an engine with the variable valve timing system and a vehicle with the engine. Background technique [0002] The traditional gasoline engine makes the engine output different power and torque by changing the throttle valve to adjust the amount of intake air, but different working conditions require different valve timings, which requires a mechanism to adjust according to the working conditions of the engine. Valve timing, this mechanism is called variable valve timing system (VVT). [0003] Figure 1 to Figure 3 shows a variable valve timing system according to the prior art comprising a camshaft vane adjuster, in particular a drive wheel 1' and a vane section 2', the periphery of which It is provided with teeth for matching with a chain or a toothed belt, and a plurality of cavities 3' are provided inside; the blade part 2' includes a central ...

AI Technical Summary

Problems solved by technology

However, due to structural reasons, the rotation space of the vane 4' is limited, so that the relative rotation angle between the vane part 2' and the driving wheel 1' is limited, which directly affects the adjustment range of the variable valve timing system. The adjustment range of the existing variable valve timing system is usually only about 40°CA (crank angle). In addition, the existing variable valve timing system has a large axial dimension, which is difficult to install and increases the height of the cylinder head.

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