Downsizing of the spark ignition engine is accepted as a key contributor to reducing fuel consumption. Turbocharged engines are becoming commonplace in passenger vehicles, replacing naturally aspirated larger capacity engines. However, turbocharged engines have typically suffered from “lag” during transient operation. This perceived effect is a combination of the low speed steady state torque and a slower rate to reach maximum torque during a load step. In order to increase customer acceptance of downsized concepts it is vital that the low speed torque and transient response are optimized.Variable Length Intake Manifolds (VLIM) have long been an established method of improving the full load performance of naturally aspirated engines. The manifold length being “tuned” to provide a high-pressure pulse at intake valve closing to maximize cylinder filling and deliver improved performance. This same approach could be applied to turbocharged engines to improve low speed torque and transient response.This paper investigates the affects of VLIM technology applied to a 1.4-litre turbocharged gasoline direct injection engine. It demonstrates improvements in low speed torque and transient response achieved through tuning. It also investigates the tuning options available at high speed on a turbocharged engine and demonstrates the fuel consumption benefits that can be achieved through varying manifold runner length.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Intake Manifold Length Effects on Turbocharged Gasoline Downsizing Engine Performance and Fuel Economy


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2012 World Congress & Exhibition ; 2012



    Publication date :

    2012-04-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Intake Manifold Length Effects on Turbocharged Gasoline Downsizing Engine Performance and Fuel Economy

    Taylor, J. / Gurney, D. / Freeland, P. et al. | British Library Conference Proceedings | 2012


    Study of an EGR System for Downsizing Turbocharged Gasoline Engine to Improve Fuel Economy

    Takaki, Daisuke / Tsuchida, Hirofumi / Akagi, Mitsuhiro et al. | SAE Technical Papers | 2014


    Effect of Variable Length Intake Manifold on a Turbocharged Multi-Cylinder Diesel Engine

    Samuel, Jensen / Annamalai, Kumarasamy / NS, Prasad | SAE Technical Papers | 2013


    Development of 2.0L Turbocharged DISI Engine for Downsizing Application

    Han, Bong-Hoon / Han, Donghee / Han, Seung-Kook et al. | SAE Technical Papers | 2007


    Development of 2.0L Turbocharged DISI Engine for Downsizing Application

    Han, D. / Han, S.-K. / Han, B.-H. et al. | British Library Conference Proceedings | 2007