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Research Journals >
Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.17 [2010] >
IJEMS Vol.17(4) [August 2010] >
| Title: | Frequency response enhancement of variable valve system by employing peak and hold method |
| Authors: | Yingjun, Xie
Zhen, Gao
Bo, Jin
Jinrong, Liu |
| Keywords: | Peak and hold method
Frequency response
Variable valve system
Proportional pressure reducing valve |
| Issue Date: | Aug-2010 |
| Publisher: | CSIR |
| Abstract: | A control method based on peak and hold technique is applied to variable
valve system to prompt its response rate. The proposed method is characterized
by a significantly higher response rate compared with the standard control
method. Different from the standard control method, which provides the coil
with a constant voltage proportional to the target lift, the control system
based on PH method provides the coil with higher voltage during the rising
stage of the valve to prompt its response rate. The mathematical model of the
system is derived to establish the transfer function of the system. The optimal
duration of peak voltage is obtained by simulink models. The experimental
results indicate that much higher frequency response can be guaranteed by
employing PH method. The maximal frequency that the system can achieve is 51 Hz,
which is greatly enhanced from 25 Hz by employing the standard control method. |
| Page(s): | 275-281 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.17(4) [August 2010]
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