Study of Start-Stop Technology on a GDI Engine
This paper has developed a start-stop control system on a GDI engine, studied effects on the rate of ignition for expansion cylinder and the start-stop performance without a starter. The experimental results showed a total rate of a successful ignition of
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Study of Start-Stop Technology on a GDI Engine Jin Li, Weifei Yu, Peng Zhou, Jianrui Zhang, Tao Chen, Pengyuan Sun and Hua Li
Abstract This paper has developed a start-stop control system on a GDI engine, studied effects on the rate of ignition for expansion cylinder and the start-stop performance without a starter. The experimental results showed a total rate of a successful ignition of the expansion cylinder beyond 70% when the lambda value ranges from 0.6 to 0.7. A multiple fuel injection could improve the rate of ignition with the case of single injection compared, the rate of ignition can be increased by averaged 4% for two times fuel injection, a four times fuel injection can increase the rate of ignition by averaged 5%. When the exhaust valve opening timing was retarded to 160 °CA ATDC increased success rate of engine starting. It will be 0.62 s for engine start by a start-stop starter, however 0.39 s by direct injection start-stop. Keywords GDI engine
21.1
Expansion cylinder Lambda Fuel injection times
Introduction
As the fuel consumption regulations and emission regulations gradually upgrade, the requirements for passenger car of energy saving and emission reduction are increasing strictly. Traffic jams cause the car working at idle speed condition for long time, consuming more fuel, producing higher emissions. Idling Start-stop technology will contribute to stop the engine when the car is running at the idle speed mode for long time, and start the engine quickly, reduce vehicle fuel consumption and emission, which is employed more and more widely [1, 2]. At present, the technology of the idle start-stop scheme mainly has three ways as follows: Independent of the starter and generator scheme, integrated starter generator J. Li (&) W. Yu P. Zhou J. Zhang H. Li R&D Center Engine Department, FAW Group Co., Changchun, China e-mail: [email protected] T. Chen P. Sun R&D Center Automotive Electronics Department, FAW Group Co., Changchun, China © Springer Nature Singapore Pte Ltd. 2017 Society of Automotive Engineers of China (SAE-China), Proceedings of SAE-China Congress 2016: Selected Papers, Lecture Notes in Electrical Engineering 418, DOI 10.1007/978-981-10-3527-2_21
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scheme, direct injection start-stop scheme [3–5]. In the world, Mazda automobile manufactures use direct injection start-stop scheme and obtain the relatively good effect. The direct injection start-stop scheme could results in more quiet and quick engine start, less cost and more effective advantages of fuel saving and emission reduction. In this paper, a direct injection gasoline engine is applied as the prototype, a direct injection start-stop control system is developed, the effect of k and injection time on rate of ignition for the expansion cylinder is mainly studied, without considering emissions, compared the direct injection starting performance to starting with starter auxiliary performance.
21.2
Start-Stop Technology Research
21.2.1 Prototype Engine Parameters A GDI engine of FAW serves
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