Study of Injected Motorcycle Carbon Deposition and Engine Performance Improvement

• Main Authors: Jia-Yan Liou, 劉嘉晏
• Other Authors: Tser-Son Wu
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/4tuzma

碩士 === 崑山科技大學 === 機械工程研究所 === 97 === The carbon deposition and engine performance improvement of a four strokes injection motorcycle engine were studied in this paper. The effect of throttle valve and intake valve carbon deposition formation on exhaust emission was investigated. The fuel additive, improvement of filter and throttle valve bored were used to suppress the throttle valve and the intake valve carbon deposition. The effect of the position of Electronics Control Unit (ECU) on the chip operation temperature was also studied. After clean throttle valve carbon deposition, CO emissions were decreased at low speed, HC emissions were not influenced. After clean intake valve carbon deposition, HC emissions were decreased at high speed. The intake valve carbon deposition was clean up with double dosage of fuel additive. The carbon deposition weight would be reduced up to 40.6%. From the analysis of throttle valve carbon deposition , the element includes 34.8% Ca, 9.36% P, 9.29% S and 1.11% Zn, it was common in engine oil. Improvement of the filter would reduce the carbon deposition formation. The operation temperature of ECU located inside motorcycle front fairing was lower than located on the side of the throttle valve.