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2006•Journal of Tianjin University Science and TechnologyRequires access

Electronically Controlled Throttle System Used for NO_x Emission Control of Lean Burn Spark Ignition Engine

Dexin Liu

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Abstract

A set of electronically controlled throttle system for lean burn spark ignition engine was developed to control NO_x emission using NO_x storage reduction(NSR)catalyst.The output torque and power kept steady as the engine operated under brief rich cursions through control of spark advance angle and throttle opening.The NO_x emission control experiments were carried out on Toyota 8A sixteen-valve EFI spark ignition engine with NSR and three-way catalyst(TWC).The results show that the minimum value of the NO_x emission is 50×10~(-6) with the conversion efficiency of above 90% after catalysts.The NO_x concentration after catalysts keeps steady during the lean/rich modulation.

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What this paper is about

A set of electronically controlled throttle system for lean burn spark ignition engine was developed to control NO_x emission using NO_x storage reduction(NSR)catalyst.The output torque and power kept steady as the engine operated under brief rich cursions through control of spark advance angle and throttle opening.The NO_x emission control experiments were carried out on Toyota 8A sixteen-valve EFI spark ignition engine with NSR and three-way catalyst(TWC).The results show that the minimum value of the NO_x emission is 50×10~(-6) with the conversion efficiency of above 90% after catalysts.The NO_x concentration after catalysts keeps steady during the lean/rich modulation.

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Available abstract

A set of electronically controlled throttle system for lean burn spark ignition engine was developed to control NO_x emission using NO_x storage reduction(NSR)catalyst.The output torque and power kept steady as the engine operated under brief rich cursions through control of spark advance angle and throttle opening.The NO_x emission control experiments were carried out on Toyota 8A sixteen-valve EFI spark ignition engine with NSR and three-way catalyst(TWC).The results show that the minimum value of the NO_x emission is 50×10~(-6) with the conversion efficiency of above 90% after catalysts.The NO_x concentration after catalysts keeps steady during the lean/rich modulation.

Key concepts: Throttle, Lean burn, Ignition system, SPARK (programming language), Automotive engineering, Ignition timing, Spark-ignition engine, Materials science

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