System Development for the Design of Gasoline Engine ECU 912547
To reduce air pollution by the exhaust gases from automotives, it is necessary to control air/fuel ratio appropriate to engine operating condition, which can be achieved by adopting an electronic control system.
In this study we designed and fabracated PC-ECU (Personal Computer interfaced - Electronic Control Unit) to develop the automotive engine control system. PC-ECU is made to perform engine control with the application of various control logics instead of the C-ECU. As a first step to develop control logics we applied jump-ramp control to the real engine using a simple on/off O2 sensor and performed engine control by the use of PC-ECU. Also, we introduced a wide band O2 sensor instead of the simple on/off O2 sensor and adopted the PI control.
The results show that the control performance in case of using a wide band O2 sensor is much better than in case of using a simple on/off O2 sensor.
Kyoung Suk Park, Dae Young Lee, Sangken Kauh, Sung Tack Ro, Eung Seo Kim
Graduate School, Seoul National University, Dept. of Mechanical Eng., Seoul National University, KOREA
International Pacific Conference On Automotive Engineering