吉林大学学报(工学版) ›› 2004, Vol. ›› Issue (3): 348-351.

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Anti-disturbing design of self-adaptive control softwares for CNG engine

YANG Xiaoping1, HONG Wei2, ZHAO Mei3   

  1. 1. College of Communications Engineering, Jilin University, Changchun 130022, China;
    2. College of Automotive Engineering, Jilin University, Changchun 130022, China;
    3. Department Six, The Second Aeronautical Institute of the Airforce, Changchun 130022, China
  • Received:2003-11-30 Online:2004-07-01

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Abstract: For raising the power performance, improving the fuel economy and reducing the emissions of nature-gas engine, the in-cylinder direct injection of natural gas and self-adaptive control of ignition timing and air-fuel ratio were adopted. The special features of disturbing resources of the self-adaptive controlled CNG engine which used the engine speed as feedback signal were analyzed, the optimal control strategy including the factor-dithering and the dither-cycle was proposed and had been carried out, a digital-filter and a watch-dog were also adopted to finish the anti-disturbing design. Combining with the hardware system design, the anti-disfurbing software feasibility was verified in a single cylinder natural gas engine, and results indicate that it can filter the disturbance of the engine load slow changes, realize averaging and fast damping the interference from engine cycle-variation, and resolve effectively the influence of the sudden changes in the engine load and the outside strong electromagnetic waves.

Key words: internal-combustion engine engineering, CNG engine, self-adaptive control, software, anti-disturbing design

CLC Number: 

  • TK431
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