Technology to Achieve Engine Efficacy: Optimized Intake System



Symposium on International Automotive Technology 2019
Authors Abstract
In the era of sustainable engines where the need of high power, torque, engine life is increasing while eliminating BSFC and emission concerns, the variable length intake manifold system helps to provide optimized intake system. The research consists of adopting continuous variable length intake manifold on diesel engines where compression and suction waves provide better swirl and pressurization methodology. The continuous varying intake manifold helps to provide better volumetric efficiency by more than 100% as constructive waves provide improved swirling which leads to reducing detonation and better combustion. The manifold path changes with every range of rpm through operating butterfly valve, which also guides air intake path according to engine load. The air flow is increased at low rpm bypassing the intake air from the long and narrow path to increase low-speed torque. The top end power is increased at high rpm by passing intake air through short and long paths which supplies the great amount of air without any restriction. The variable length intake manifold reduces emission in the diesel engine as it provides pressurized air flow leading to Helmholtz resonance which improves combustion. The total hydrocarbons, CO is reduced while increasing small amount of NOX along with the decrease in BSFC. The optimized torque is achieved with higher cross section manifold at low rpm and with lower cross section at higher rpm, this led to drawback of any multi stage variable intake manifold. The continuous variable intake manifold helps to provide the optimized intake path to provide maximum power and torque. The slider mechanism empowers to attain continuous varying length which removes the limitations of multiple paths operated by multiple valves.
Meta TagsDetails
Sharma, P., Singh, A., Sharma, V., and Rai, V., "Technology to Achieve Engine Efficacy: Optimized Intake System," SAE Technical Paper 2019-26-0052, 2019,
Additional Details
Jan 9, 2019
Product Code
Content Type
Technical Paper