Research on HC Adsorption Emission System

Yamazaki, Hideharu; Endo, Tetsuo; Ueno, Masaki; Sugaya, Satoshi

doi:10.4271/2004-01-1273

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…Zimmermann et al (1999) presented the concept of heating fuel inside an injector to enhance vapourization in the intake manifold, which led to reduced HC emissions. A method utilizing HC absorbent is another approach to reduce cold-start emissions (Williams et al 1996, Yamazaki et al 2004, Noda et al 1997, Noda et al 1998. Approaching the light-off temperature of the catalyst at a rapid rate is of paramount importance in curtailing cold-start emissions (Faltermeier et al 1998, Murphy et al 1999, Crane et al 1997, Choi 2000, Morris et al 1999.…”

Section: Introductionmentioning

confidence: 98%

Effects of intake air temperature on SI engine emissions during a cold start

Wang

Wei

2011

International Journal of Sustainable Energy

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This paper presents the concept of preheating the intake air to reduce cold-start emissions from gasoline engines. The effects of intake air temperature on emissions from a gasoline engine were studied by using an air heater based on spark ignition. A light-duty vehicle test of cold-start emissions was carried out at an ambient temperature of −7 • C according to New European Driving Cycle for Euro 3 and Euro 4 exhaust emission legislations. The results showed that preheating the intake air could effectively reduce both hydrocarbon (HC) and carbon monoxide (CO) emissions and improve fuel economy during a cold start. During idling conditions, the key phase of the HC and CO emissions was the first 40 s. With the aid of the air heater, cold-start HC and CO emissions from the vehicle were lower than the limit values in the Euro 3 and Euro 4 regulations.

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Section: Introductionmentioning

confidence: 98%

Effects of intake air temperature on SI engine emissions during a cold start

Wang

Wei

2011

International Journal of Sustainable Energy

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“…For example, zeolites have been used to trap and then to release HCs once the after-treatment system is sufficiently heated. 13,14,17,18 Such adsorbers have the advantage that they do not consume additional fuel or battery energy, and they are relatively inexpensive compared with precious metal catalysts (e.g. less than US$1.0 per gram).…”

Section: Introductionmentioning

confidence: 99%

Cold-start emissions control in hybrid vehicles equipped with a passive adsorber for hydrocarbons and nitrogen oxides

Gao

Kim

Choi

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part D:

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We present results from a computational study of the potential for using low-cost sorbent materials to trap the emissions of hydrocarbons and nitrogen oxides temporally during cold-start periods in hybrid electric vehicles and plug-in hybrid electric vehicles operating over transient driving cycles. The hydrocarbon adsorption behavior of a candidate sorbent composed of Ag-beta-zeolite was characterized in a laboratory flow reactor to estimate the kinetic parameters for a one-dimensional transient adsorber device model. This model was then implemented in the Powertrain Systems Analysis Toolkit to simulate a passive hydrocarbon adsorber device on a hybrid vehicle. The results indicate that such an adsorber can substantially reduce the hydrocarbon emissions by temporarily storing them until the three-way catalyst is sufficiently warm to remove them from the exhaust. A similar adsorber device model was simulated for nitrogen oxide control, using an initial set of conjectured kinetic parameters for transition metal oxides based on limited information in the literature. These latter simulations revealed the need to pursue additional experimental studies to characterize fully this class of sorbents. Such studies are especially relevant in the present context of rapidly evolving vehicle technology, because emission controls of this type do not involve any penalty in fuel consumption or require any change in engine operation.

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Impact of Zeolite Beta on Hydrocarbon Trapping and Light-Off Behavior on Pt/Pd/BEA/Al2O3 Monolith Catalysts

Bugosh

Harold

2017

Emiss. Control Sci. Technol.

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Research on HC Adsorption Emission System

Cited by 8 publications

References 12 publications

Effects of intake air temperature on SI engine emissions during a cold start

Effects of intake air temperature on SI engine emissions during a cold start

Cold-start emissions control in hybrid vehicles equipped with a passive adsorber for hydrocarbons and nitrogen oxides

Impact of Zeolite Beta on Hydrocarbon Trapping and Light-Off Behavior on Pt/Pd/BEA/Al2O3 Monolith Catalysts

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