Full behavior air/fuel ratio control method of double mode directly jetting gasoline engine |
Title： |
| Full behavior air/fuel ratio control method of double mode directly jetting gasoline engine |
|
Application Number： |
200710118468 |
Application Date： |
2007/07/06 |
Announcement Date： |
2007/12/05 |
Pub. Date： |
|
Publication Number： |
101082309 |
Announcement Number： |
|
Grant Date： |
|
Granted Pub. Date： |
|
ApplicationType： |
Invention |
State/Country： |
11[] |
IPC： |
F02D 41/00 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Tian Guohong, Wang Zhi, Wang Jianxin, Shuai Shijin |
Key Words： |
air/fuel ratio, Full behavior, double mode, gasoline engine |
Abstract： |
A method to control the full-behavior air-fuel ratio of the bimodal bursting petrol motor adopts different air-fuel ratio under the different combustion modes to control combustion: under the firing mode, the triple effect catalytic converter uses the theoretical air-fuel ratio to reduce the emission. Under the compression-ignition mode, use the lean-burn with the throttle fully opening to improve the fuel economy. In the transition zone of the two combustion modes, the throttle jaw opening is kept and the air-fuel ratio of the firing mode is little higher than the theoretical value. The laminar lean-burn is realized matching the injection strategies. The gas mixture under the compression-ignition mode is stronger than that under the firing mode with the same throttle jaw opening. The air-fuel ratio is closes to the theoretical value. This method can combine the advantages of the two combustion modes, avoid defects and realize stable combustion in the full-behavior range. Especially during the mode transmitting process, it can simplify the control strategies, improve the smoothness and avoid the abnormal combustion phenomenon of knocking and losing fire during this process. |
Claim： |
|
Priority： |
|
PCT： |
|
LegalStatus： |
|
Relevancy information
