Design and Simulation of Ignition System of a Heavy Motorcycle with a Four-stroke V2 Engine

• Main Authors: Kuo Chao -Hsien, 郭昭賢
• Other Authors: Hsiao Min-Hung
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/15692271219610872286

碩士 === 國立臺北科技大學 === 車輛工程系碩士班 === 90 === Abstract The purpose of this thesis is to design and simulate ignition system of a heavy motorcycle with a four–stroke, V type dual cylinder engine. The main works include the detection of the top dead center of the engine piston, the control of the dwell angle and the ignition time. This research uses Matlab/Simulink to simulate ignition system. The simulated signal of crankshaft position sensor is generated to verify the proposed method of the detection of the top dead center. The current of the primary circuit is controlled at 6.5 ampere to prevent insufficient spark energy under high engine speed. The fuzzy logic based on peak combustion pressure and piston position is used to modify the ignition time. Nowadays, engine ignition timing control is based on engine speed, load and other sensors to build advanced timing distribution. Because the combustion process is different in each individual stroke, the optimal ignition timing is not always the same in spite of the same engine speed and load. This research shows that engine torque can be increased when ignition time is adjusted according to peak combustion pressure in each individual stroke.