Electromagnetic valve train for gasoline engine exhaust system
| Autor: | Siqin Chang, Jiangtao Xu, Liang Liu, Jianguo Dai, Xinyu Fan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Valve timing
Engine power Muffler Engineering business.industry 020209 energy Valve float 02 engineering and technology Energy consumption Automotive engineering law.invention 020303 mechanical engineering & transports 0203 mechanical engineering Internal combustion engine law Automotive Engineering 0202 electrical engineering electronic engineering information engineering Exhaust gas recirculation business Petrol engine |
| Zdroj: | International Journal of Automotive Technology. 17:361-367 |
| ISSN: | 1976-3832 1229-9138 |
| Popis: | Electromagnetic valve train (EMVT) in camless engine offers large potential for both part load fuel economy and high load engine torque. However, it is more difficult to be applied on exhaust system than intake system. Because the gas pressure brings high demands for driving force, especially at high engine speed and full load. Based on the working characters of actuator, a method by increasing the transient currents in windings during valve’s opening motion is suggested to overcome the gas pressure. But this will cause more energy losses and heat. In order to make the EMVT used on exhaust system better, quantitative analysis is carried out against the additional power consumption caused by gas pressure under different conditions. Furthermore, an approach is introduced to define the optimal exhaust valve opening motion at full load conditions. It aims at making a better compromise between the engine power output and exhaust valves’ power consumption, thus both the efficiency of EMVT and engine performance are enhanced. |
| Databáze: | OpenAIRE |
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