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2004•Journal of Jilin University of TechnologyRequires access

EGR system for automotive diesel engine

Zhongchang Liu

Open publisher page 1 citations

Abstract

To reduce NO_x emission of an automotive diesel engine, an EGR(Exhaust Gas Recirculation) system was developed.The control system hardware of EGR and its control strategy were presented. In this system,an intake air throttle valve and an EGR flow valve are controlled by a single chip processor.The test results show that optimized EGR ratio from 0～30% can be realized by this EGR system.The EGR system can greatly reduce NO_x emission while keeping the particulate emission at the same level,but the HC and CO emissions deteriorate to some extent in the same test conditions.The brake specific fuel consumption measured by the ECE R49 test cycle also decreased compared to baseline engine.

About this research paper

What this paper is about

To reduce NO_x emission of an automotive diesel engine, an EGR(Exhaust Gas Recirculation) system was developed.The control system hardware of EGR and its control strategy were presented. In this system,an intake air throttle valve and an EGR flow valve are controlled by a single chip processor.The test results show that optimized EGR ratio from 0～30% can be realized by this EGR system.The EGR system can greatly reduce NO_x emission while keeping the particulate emission at the same level,but the HC and CO emissions deteriorate to some extent in the same test conditions.The brake specific fuel consumption measured by the ECE R49 test cycle also decreased compared to baseline engine.

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Available abstract

To reduce NO_x emission of an automotive diesel engine, an EGR(Exhaust Gas Recirculation) system was developed.The control system hardware of EGR and its control strategy were presented. In this system,an intake air throttle valve and an EGR flow valve are controlled by a single chip processor.The test results show that optimized EGR ratio from 0～30% can be realized by this EGR system.The EGR system can greatly reduce NO_x emission while keeping the particulate emission at the same level,but the HC and CO emissions deteriorate to some extent in the same test conditions.The brake specific fuel consumption measured by the ECE R49 test cycle also decreased compared to baseline engine.

Key concepts: Automotive engineering, Throttle, Exhaust gas recirculation, Diesel engine, Automotive industry, Diesel fuel, Fuel efficiency, Exhaust gas

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