Variable air intake valve different lift device of motor

Abstract

A variable air intake valve different lift device of a motor comprises a stepped sleeve, a core gear shaft, an outer cam component, an inner cam component and a phase angle adjusting device. An end portion at one end of the core gear shaft which can be rotationally arranged in the stepped sleeve is aligned to a port portion at the front end of the stepped sleeve, and an end portion at the other end of the core gear shaft extends the a rear end port of the stepped sleeve. The outer cam component is fixedly sleeved on the periphery of the stepped sleeve. The inner cam component can be rotationally sleeved on the periphery of the stepped sleeve and fixedly connected with the core gear shaft in the stepped sleeve. The phase angle adjusting device is connected with the end, extending out of the stepped sleeve, of the core gear shaft and a cam in the outer cam component at the same end of the stepped sleeve. By the aid of a variable air intake valve different lifting method and the relative device, a pair of air intake cylinders of each cylinder is enabled to generate continuously variable different angles, so that air intake valve lift is changed to generate vortex and adjusting vortex, contradiction between an air movement organization and an air inflow coefficient is balanced, and performance of the motor can be comprehensively optimized.

Description

technical field [0001] The invention relates to an engine. In particular, it relates to a device for variable lifts of different intake valves of an engine with adjustable lift difference between two intake valves of the same cylinder. Background technique [0002] For the engine, the presence of tumble and swirl at the same time is more conducive to the organization of the combustion process. However, the 4-valve engine is symmetrically arranged due to the dual intake port structure and the two cam profiles that drive the intake valve are almost the same, as figure 1 shown. The two intake valves open to the same degree at the same time, so that the intake velocity and intake air volume of the two intake valves are the same at the same time, and the rotating airflow in the cross-sectional direction of the cylinder block cancels each other out, and the overall movement of the air in the cylinder is expressed as a single longitudinal direction In the tumble flow mode, there...

AI Technical Summary

Problems solved by technology

However, since the engine has different requirements for swirl motion and flow coefficient under different speeds and loads, the different lift method of the intake valve cannot adjust the swirl flow according to the working conditions.

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