International Journal of Research in Engineering and Applied Sciences

Air filters are the key components for automobiles, and evolves with developments in the automotive industry. Taking the automotive industry as a whole it must be observed that the air filtration applications around road vehicles have increased and are still increasing. Besides filters for the crankcase ventilation and transmission filters a whole new range of filter systems in the vehicle has developed. This is mainly due to the so-called On-board diagnostics (OBD) II standard and driven by the trend to zero emission vehicles. A multitude of sensors on the cars, which can be very sensitive to contamination (with particles and gases) and in many cases have to be protected, require specific air filters. Today there are 30 to 40 different filter applications around the automobile to be found. The technological performance requirements of the majority of these products are usually more straightforward and are often but vaguely defined. The definition of performance profiles does not yet follow standardized filter tests but are negotiated. Further by proper maintenance can help vehicles perform as designed, positively affecting fuel economy, emissions, and overall drive ability. This paper addresses the issues of whether air filter replacement improves fuel economy. This paper describes the measured results with focus on changes in vehicle fuel economy but also including emissions and performance. Previous studies shows replacing clogged air filter can improve vehicle fuel economy and, conversely, that a clogged air filter can be significantly detrimental to fuel economy. An attempt made in this study by approaching experimentally by using different air filters for analyzing the performance of diesel engine. Also study focused on diesel emissions and other particulate matter (PM) contaminants lead to improvement in original manufactured air filter to re - design filtration system for diesel engine.