Novel air distribution system with variable lift

Abstract

The invention provides a novel air distribution system with variable lift, which is applied to the field of the internal-combustion engine of the motor vehicle. The novel air distribution system with variable lift comprises a hydraulic tappet (1), an air valve (2) and a rocking arm (3), and further comprises a transmission gear (7), an adjusting rod (9) and a stepping motor (10), wherein, a cam shaft (6) is arranged between the rocking arm (3) and the adjusting rod (9), the cam of the cam shaft is in contact with the adjusting rod (9), the adjusting rod (9) is connected with the transmission gear (7), and the transmission gear (7) is meshed with the stepping motor (10). By adopting the technical scheme, the invention has the advantages that the purpose that the air valve is changed along with the demands of the operating conditions is achieved, and the performance of the engine is optimized to the utmost extent; the structure is simple and compact, and the design is reasonable; and the modification of the engine applying the mechanism is small. Furthermore, the invention is suitable for upgrading for the production products.

Description

technical field [0001] The invention relates to the field of motor vehicle internal combustion engines, and more specifically, the invention relates to a novel variable-lift gas distribution system. Background technique: [0002] With the rise of oil prices and increasingly stringent emission regulations, engines with low pollution, low fuel consumption, high power and high torque are our pursuit goals. The valve train seriously affects the combustion characteristics and emission characteristics of the engine. The valve that controls the engine charge exchange process has three main characteristic parameters: the valve opening phase, the valve opening continuous angle (the crankshaft angle at which the valve remains open) and the valve lift. These three characteristic parameters have a significant impact on engine performance, fuel consumption and emissions. Generally, the valve opening phase and the valve opening duration angle are collectively referred to as valve timing...

AI Technical Summary

Problems solved by technology

The fully variable mechanism currently used is also a new technology in recent years. They also realize the function of continuously variable valve lift through a series of mechanical or hydraulic mechanisms. However, the foreign valve mechanism needs a special one at present. Level control arm, its mechanism is relatively complex, the required adjustment torque is relatively large, and the friction loss is also relatively large due to the increase in the number of motion pairs during the adjustment process, so the improvement of fuel economy is very limited, and the control accuracy is not high

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