Design and Implementation of a Voltage Booster Circuit for High-Pressure Injector Drives in GDI Engines

Abstract:

A DC/DC voltage booster circuit is essential to design for the high-pressure (H.P.) injector driving circuit since the power supply voltages for various H.P. injectors are DC 60~90 V rather than DC 12~14V battery voltages. The DC 12~14V battery voltages have to be boosted up to the stable DC 60~90 V voltages supply for being able to drive various H.P. injectors. The new H.P. injector driving circuit consists of a voltage booster circuit and an originally designed three-stage power MOSFETs injector driving circuit to control the dc-link power supply voltage. The dynamic performance of a H.P. injector driven by the designed electrical driving circuit with the voltage booster are simulated and analyzed. The stability and electrical characteristics for the voltage booster under various injection pulse durations and engine speeds are investigated. The fuel injection quantities, supply voltages and injector driving currents of the H.P. injector fed by the new injector driving circuit is illustrated and analyzed in the paper. The experimental results show that this injector driving circuit with a newly designed voltage booster is capable of operating stably to drive the H.P. injector and obtain the accurate fuel injection quantities in the air-fuel ratio control of engines.

• Periodical: Applied Mechanics and Materials (Volumes 128-129)
• Pages: 1367-1370
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.128-129.1367
• Online since: October 2011
• Authors: Wen Chang Tsai
• Keywords: Engine, Gasoline Direct Injection (GDI), High-Pressure (H.P.) Injector, Injector Driving Circuit, Voltage Booster

References

[1] A. Jiangjian; B. Gao Xiyan; C. Yao Chunde, An Experimental Study on Fuel Injection System and Emission of a Small GDI Engine, Proceedings of the 2nd IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications, pp.1-6, (2006).

DOI: 10.1109/mesa.2006.296988

[2] Shyue-Bin Chang, Wen-Chang Tsai et al., Development of Advanced Small Single-Cylinder Clean and Energy-saving Engine System, The 3rd Year - Annual Technical Report of TDPA Project No. 98-EC-17-A-16-S1-100, (2011).

[3] Shyue-Bin Chang, Wen-Chang Tsai, Peng-Cheng Yu, Kun-He Chen, Cing-Jhang Guo, Application of a PC_Based Control System for Improving the Performance and Emissions of GDI and PFI Operations in a 500cc Motorbike Engine Test Stand, ICIC Express Letters, vol. 5, no. 5, (2011).

[4] Wen-Chang Tsai, Peng-Cheng Yu, Design for the High-pressure Gasoline Direct Injector Drive for a 500cc Motorbike Engine, International Journal of Engineering and Industries, vol. 1, no. 1, pp.1-6, Feb. (2011).

DOI: 10.4156/ijei.vol2.issue1.9

[5] Qun Zhao and F. C. Lee, High-Efficiency, High Step-Up DC–DC Converters, IEEE Transaction on Power Electronics, pp.65-73, vol. 18, Jan (2003).

DOI: 10.1109/tpel.2002.807188