Crank Event Based Fuel Injection and Spark Ignition Timing Control Strategy for SI Engines

Abstract:

For the controlled gasoline engine MR479Q, the crank speed, camshaft position, fuel injection, spark ignition timing signals and their relationships under control mode of group ignition and fuel sequential injection were deeply analyzed, then an electronic control unit (ECU) hardware platform solution based on Freescale 16-bit microcontroller MC9S12XEP100 was given out. Taking advantages of the hardware platform itself, a crank event based fuel injection and spark ignition timing control strategy was proposed to enhance traditional fuel injection and ignition reliability. Fuel pulse width, ignition coil dwell time and spark advance control under different engine operating conditions were then designed in detail respectively. The bench test results show that, the fuel injection and spark ignition timing control signals of ECU are accurate and stable enough under steady operating conditions, even under transient operating conditions when step disturbance exists in throttle opening, the fuel pulse width, dwell time and spark advance are also delivered correctly and reliably. The strategy is feasible enough to accomplish precise control of fuel injection and spark ignition.

• Periodical: Advanced Materials Research (Volumes 516-517)
• Pages: 585-592
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.516-517.585
• Online since: May 2012
• Authors: Dong Wei Yao, Feng Wu, Huang Xie, Yong Guang Zhang
• Keywords: Automotive Electronics, Fuel Injection, SI Engine, Spark Ignition, Timing Control

References

[1] Sen Wu: Engine Management System of BOSCH (in Chinese, Beijing Institute of Technology Press, 2009).

[2] Dongwei Yao, Feng Wu, Chongguang Zhou: Chinese Internal Combustion Engine Engineering (in Chinese), Vol. 30 (2009), pp.67-71.

[3] Reference Manual of Freescale MC9S12XE-Family on http://www.freescale.com.

[4] Users' Manual of Advantech PCI-1727U Card on http://www.advantech.com.cn.

[5] Yongguang Zhang: Research and Development of Hardware-in-the-loop Test Bench for Engine ECU Based on xPC Target (in Chinese, Master Dissertation of Zhejiang Universtiy, 2011).