가솔린 차량의 과도구간에서 점화시기 제어를 고려한 주행모드 시뮬레이션

Modern vehicles require a high degree of refinement, including good drive ability to meet customer demands. Vehicle drive ability, which becomes a key decisive factor for marketability, is affected by many parameters such as engine control and the dynamic characteristics in drive lines. This paper focuses on the simulation of FTP-75 mode which is considered with spark timing control on transient condition. Break down of vehicle fuel consumption for FTP-75 mode show that the first is acceleration, foremost is steady, next is the braking, next is the idle. The result of the experiment is that the acceleration is the most important factor for vehicle fuel economy. The retard of spark timing increase in proportion to acceleration. Likewise, BSFC(Break Specific Fuel consumption) which is affected by spark timing also increase in proportion to acceleration. The result of simulation considered transient condition shows 0.48% of error comparing with a test on chassis-dynamometer.