3、sedonMajor:Studuent:SupervisorabsraoteThe gasoline engine variable valve technology as a cost-effective quite high technical scheme, been widely used. Especially in recent years because of rising oil prices and increasingly strict environmental protection laws and regulations, variab
4、le of valve-train saving fuel and reduce exhaust pollution and increase engine power are significantly. Widely used in this paper with the latest technology of modern car engine - totally variable valve driving mechanism VVA BMW new series engine, Toyota VTEC - I engine of the struct
5、ure, principle and technical analysis, the new design idea of my bai. The main research contents include: 1. To BMW completely variable valve technical structure and workingprinciple of carry on the analysis, thus further understanding of variable valve technology; 2. The Honda VTE
6、C variable valve structure and working principle of technology analysis; 3. To my design camshafts, comparison and the guide-subject advantages and disadvantages of existing technology. 29 This article through to Honda new engine completely variable valve technology, Honda VTEC vari
7、able valve technologies were analyzed, and the new camshaft thinking direction, and then to the development trend of future engine technology for certain exploration. Smalltwistedpaperbrokenmachineforordinaryhome,notonlycanbeusedformincedmeat,canalsobeusedwithcrushedpeanuts,crushedic
