Development of Gasoline Direct Injection Engine

Iwamoto, Y.; Noma, Kazutoshi; Nakayama, Osamu; Yamauchi, Teruo; Ando, H.

doi:10.4271/970541

Cited by 287 publications

(77 citation statements)

References 11 publications

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“…This new combustion strategy which attracted even more the attention of the automotive manufacturers due to the worldwide concern for global warming and climate change, offers significant potential for overall leaner combustion, less cylinder-to-cylinder air-fuel variations and lower unburned hydrocarbon emissions particularly during cold start [1,2]. Well controlled stratified charge operation during part loads remains the key to the success of the DISI technology and it is achievable with this combustion concept since the spray-guided technique uses the dynamics of the injection process rather than the charge motion or piston wall to ensure that a combustible mixture reaches the spark plug at the time of ignition.…”

Section: Introductionmentioning

confidence: 99%

Internal Flow and Spray Characteristics of Pintle-Type Outwards Opening Piezo Injectors for Gasoline Direct-Injection Engines

Marchi

Nouri

Yan

et al. 2007

SAE Technical Paper Series

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Section: Introductionmentioning

confidence: 99%

Internal Flow and Spray Characteristics of Pintle-Type Outwards Opening Piezo Injectors for Gasoline Direct-Injection Engines

Marchi

Nouri

Yan

et al. 2007

SAE Technical Paper Series

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“…After the closure of C s , the CVT is allowed to shift. The dynamic equations of the engine are the same as in mode 5 . The dynamics for all other parts are governed by one equation with a form of…”

Section: Appendix Amentioning

confidence: 99%

“…However, increases much beyond today's ratio of 9:1 or 10:1 introduce additional problems such as higher emissions and a greater tendency toward combustion knock [2]. Moreover, advanced technologies such as lean burn [3,4], direct injection [4,5] and four valves per cylinder can improve the engine efficiency significantly. The trends for decreasing the energy required to propel the vehicle, e.g., reducing the vehicle mass by using lightweight materials, improving the aerodynamics by optimizing the vehicle shape and cutting the rolling resistance through an advanced tire design, have started to emerge and will continue [6].…”

Section: %mentioning

confidence: 99%

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IdleStop and Go: a way to improve fuel economy

Shen

Vroemen

Veldpaus

2006

Vehicle System Dynamics

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This paper proposes a mechanical solution to save fuel by shutting down an internal combustion engine whenever it is unnecessary for propulsion, e.g., when a vehicle is waiting for traffic lights. The engine and vehicle are restarted using the energy that is stored in a flywheel. Two additional clutches are needed to enable appropriate power flow from the flywheel to the engine and vehicle. This complicates the powertrain dynamics in that the number of degrees of freedom changes due to clutch operations. Therefore, a hybrid control strategy, which is treated as a top-level controller, is introduced to deal with this finite-state mechanical system. At the lower level, the engine and clutches are controlled in a coordinated manner such that the vehicle is launched according to the driver's demands. Using a comprehensive powertrain simulation package, the proposed controller is evaluated numerically.

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“…The major drawback of lean-burn gasoline engines is the inefficient NO x conversion of the conventional three way catalyst (TWC) under ultra lean air/fuel ratio (AFR) conditions (König et al, 1996). At present, the major methods of NO x reduction are in-cylinder combustion process improvement (Stokes et al, 1994;Iwamoto et al, 1997;Lumsden et al, 1997) and the highly efficient catalytic technology of after-treatment systems (Hoffmann et al, 1997;Brogan et al, 1998;Gregory et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Effect of rich air/fuel ratio and temperature on NO x desorption of lean NO x trap

Liu

Zhang

et al. 2013

J. Zhejiang Univ. Sci. A

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An experimental and model-based study of the effect of rich air/fuel ratios (AFRs) and temperature on the NO x slip of a lean NO x trap (LNT) was conducted in a lean-burn gasoline engine with an LNT after-treatment system. The emissions of the engine test bench and the inlet temperature of the LNT were used as the major inlet boundary conditions of the LNT. The engine periodically operated between a constant lean AFR of 23 with alterable rich AFRs of 10, 11, 12, 13, and 14. A decrease in the rich AFR of the engine strengthened the desorption atmosphere in the LNT, an effect closely related to the number of reductants, and further heightened the NO x desorption of the LNT, but with a penalty in fuel consumption. To eliminate that penalty, the inlet boundary conditions of the LNT were varied by adjusting the inlet temperature within a range between 200 °C and 400 °C. An increase in inlet temperature heightened the NO x desorption of the LNT, and a NO x breakthrough occurred after the inlet temperature exceeded 390 °C. To control NO x breakthrough, the inlet temperature can be adjusted to offset the strong desorption atmosphere in the LNT commonly created by a rich AFR.

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Development of Gasoline Direct Injection Engine

Cited by 287 publications

References 11 publications

Internal Flow and Spray Characteristics of Pintle-Type Outwards Opening Piezo Injectors for Gasoline Direct-Injection Engines

Internal Flow and Spray Characteristics of Pintle-Type Outwards Opening Piezo Injectors for Gasoline Direct-Injection Engines

IdleStop and Go: a way to improve fuel economy

Effect of rich air/fuel ratio and temperature on NO x desorption of lean NO x trap

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