Reduction of Hyperbrid Diesel Engine Emission by EGR: [An Only Possible Method to Meet US Emission Standard of the Year 2004]

Kanesaka, Hiroshi; Tanaka, Toshihiko; Sakai, Hiroshi

doi:10.4271/1999-01-0971

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…The turbo-lag characteristic of a direct-injection (DI) turbocharged and after-cooled (TCA) diesel engine will result in deteriorating performance under transient operations because of inadequate air charge, excess fuel supply and poor incylinder air turbulence [1,2]. To reduce such deterioration, new technologies such as the additional mechanical supercharging system [3], twin turbo system [4,5], turbocharger power assist system [6], variable geometry turbo charger system [7][8][9][10], and variable flow turbocharger [11] have been proposed in recent years.…”

Section: Introductionmentioning

confidence: 99%

High pressure air spray assistant power supply control strategies and their effects on diesel engine under transient operations

Han

Liu

Wang

et al. 2007

Front. Energy Power Eng. China

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In order to reduce smoke from direct-injection (DI) turbo-charged and after-cooled (TCA) diesel engines under transient operations, the real-time controlling and measuring system of a high pressure air spray assistant power supply (HPAS) was developed. Effects of HPAS on a DI TCA diesel engine under constant engine speed and increased torque (CSIT) transient operations were studied by using different control strategies. Pre-spray (PS) strategy, which means supplying highly pressurized air into the exhaust manifold two seconds before the accelerating-graph begins to rise and stopping spraying air when the acceleratinggraph stops rising. Two other strategies-full-time-spray (FTS) and middle-time-spray (MTS)-were used to fully exploit HPAS potential. With the FTS and MTS strategies, the HPAS system can remarkably decrease smoke from DI TCA diesel engines under transient operations.

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