Current Journal of Applied Science and Technology

As a result of the negative impact of transportation emissions from locomotives, trucks, passenger cars and others on the environment, people’s health as well as animals, plants and buildings, there is need to turn to a more environmental friendly fuel for the transport system One of the friendly fuel is to use the compressed natural gas (CNG) in the transportation means, where CNG is cheap and easy obtainable. On the other hand, the transistorized ignition system can gives high voltage in its spark. However, the aim of the present work is to analysis the exhaust gas emissions produce from bi-fuel vehicle engine equipped by either conventional or transistorized breakerless ignition system at cold start, warm-up or waiting for traffic lights. The study involves the measurements of engine exhaust gas emission factors such as total hydrocarbon (THC), carbon monoxide (CO), carbon dioxide (CO₂) at no load, while the engine is running under two modes. In the first mode, the engine run on gasoline, while in the second mode, the engine runs on CNG. By using this concept, the influence of the transistorized ignition when used in the bi- engine which runs in the two modes considered on the exhaust gas emission factors has been identified. The results indicate that a significant reduction in exhaust gas emission factors are obtained, the values of THC, CO and CO₂ measured when the engine was equipped by transistorized ignition system are lower than those measured when the engine was equipped by conventional ignition system.