Title :
Development of an electrical control VVT system for high speed SI engines
Author :
Li, Liguang ; Su, Yan ; Wang, Yunkai ; Tao, Jianwu ; Xiao, Min
Author_Institution :
Coll. of Automotive Eng., Jilin Univ., Changchun, China
Abstract :
A newly developed electrical control variable valve timing (VVT) system is presented which is applied by changing the intake valve closing timing based on the variable working position extender. It has some advantages such as its simple structure, little modification for the engine, easy installation and low cost etc. The test results show that the engine performance is modified distinctly, such as the torque at low speed, the output power at high speed, the fuel economy and the emission in some conditions. This VVT system is suitable for use in the high-speed automotive engines with double overhead cam (DOHC)
Keywords :
automotive electronics; internal combustion engines; timing; transport control; valves; DOHC; double overhead cam; electrical control VVT system; engine emissions; engine performance modification; fuel economy; high speed; high-speed automotive engines; intake valve closing timing; low speed; output power; spark ignition engines; torque; variable valve timing system; variable working position extender; Control systems; Costs; Electric variables control; Engines; Fuel economy; Power generation; Testing; Timing; Torque; Valves;
Conference_Titel :
Vehicle Electronics Conference, 2001. IVEC 2001. Proceedings of the IEEE International
Conference_Location :
Tottori
Print_ISBN :
0-7803-7229-8
DOI :
10.1109/IVEC.2001.961736
