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Energy is important in causing the economic growth of any country. Due to depletion of conventional energy sources and escalating prices of such fuels, the researchers have started to focus their attention on the use of alternative fuels. A possible solution may be found with renewable energy sources such as biomass, solar, hydropower and wind energy. Biomass is abundant, environmental friendly and is an attractive substitute to fossil fuels. When compared to all energy sources from biomass, alternative fuels in gaseous form offer more convenience. Producer gas from biomass gasification can be used as an alternative fuel in spark-ignition engines. Use of 100% producer gas in spark ignited engine is peculiar because of its low energy density, hence low output and efficiency. This paper reviews the use of producer gas as alternative fuel for SI engines, experimental investigation on producer gas as fuel, merits, demerits and problems faced. [ABSTRACT FROM AUTHOR]

With the increasing strictness of emissions regulations, continuously high requirements of market on automotive performance and energy-saving, the technology of engine electronic control is more and more extensive and deeper. Enormous natural gas reserves in our country and more complete CNG filling stations in urban city provided a larger space for the development of CNG vehicles. Thus, the use of natural gas and gasoline-fueled dual-fuel engine control system is of great practical significance and dedicated to improving the current dual-fuel vehicle technology in the engine management level, being the driving force to enhance engine performance, minimizing emissions reduction, and making full use of China's natural gas resources. Foreign ECU hardware technology, such as microcontroller, microprocessor, sensor, actuator, and special-purpose integrated circuit, has been very mature [1- 2]. In China, only some universities and a few companies[5-7] focus on this field. Generally, there is a considerable gap between domestic technology and the foreign. Based on the Motorola 16-bit MCU MC9S12DP256, the gasoline engine and the CNG engine ECU hardware were design. Base on the embedded C language with CodeWarrior IDE, software was design and debugged, and the control stratagem was made according to the data acquisition and data analysis. Through the MAP, with the engine speed and intake manifold absolute pressure signal values, the basic fuel injection pulse width was founded by interpolation method. According to other working condition parameters, the closed-loop feedback control and air-fuel ratio control were modified and realized the fuel injection control. [ABSTRACT FROM AUTHOR]

Multi-objective optimization method of ignition timing on gasoline engine using alternative fuels, CNG and Petrol was studied. And a kind of method named MOAGA was made for optimization. Ignition timing multi-object optimization model was built and the parameters of object function such as torque, exhaust gases are uniformed. Base on the data from ECU hardware in-loop system and real exhaust experiment, the MOGAA was used to search the key to the object function. The results show it comprehensive performance is relative better in the T of 0.7 for the ignition timing. And four stable situations test results that the NOx improve maximum to 27.32%, HC improve maximum to 22.31% and CO improve 0.01% while the torque loss is lees than 5%. [ABSTRACT FROM AUTHOR]