Title:
PILOT-INJECTION CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/1992/006286
Kind Code:
A1
Abstract:
The present invention relates to a pilot-injection control device wherein fuel in a pump chamber is pilot-injected in such a manner that the volume of a variable volume chamber communicating with the pump chamber through a port being on-off operated at a predetermined position of a plunger during a process of pressurizing the pump chamber by the plunger is varied by extending an actuator or the like of an electrostriction-type actuator during a predetermined opening time of the port for example. In the past, the actuator has been driven when the pressure of the variable volume chamber reaches a predetermined value after the start of plunger lifting. However, with this arrangement, the start of pilot-injection does not catch up with a plunger lift during the high speed rotation, whereby main injection and auxiliary injection are conducted continuously. According to the present invention, the on-off time of the port in the previous injection is detected and the time of driving the actuator for the pilot-injection is determined in response to a signal of the detection, whereby, even during the high speed rotation, the time of pilot-injection is determined earlier, so that the pilot-injection is not delayed.
Inventors:
IZAWA AIKIHIRO (JP)
SAKAKIBARA YASUYUKI (JP)
ABE SEIKO (JP)
ENOMOTO SHIGEIKU (JP)
YANAGIHARA HIROMICHI (JP)
HENDA YOSHIMITSU (JP)
MATSUMURA TOSHIMI (JP)
SHIBATA MASAMICHI (JP)
SAKAKIBARA YASUYUKI (JP)
ABE SEIKO (JP)
ENOMOTO SHIGEIKU (JP)
YANAGIHARA HIROMICHI (JP)
HENDA YOSHIMITSU (JP)
MATSUMURA TOSHIMI (JP)
SHIBATA MASAMICHI (JP)
Application Number:
PCT/JP1990/001294
Publication Date:
April 16, 1992
Filing Date:
October 05, 1990
Export Citation:
Assignee:
NIPPON DENSO CO (JP)
NIPPON SOKEN (JP)
TOYOTA MOTOR CO LTD (JP)
NIPPON SOKEN (JP)
TOYOTA MOTOR CO LTD (JP)
International Classes:
F02D1/02; F02D41/38; F02D41/40; F02M41/12; F02M45/06; F02D41/20; (IPC1-7): F02D1/02; F02D41/38
Foreign References:
| JPS623133A | 1987-01-09 | |||
| JPS62182445A | 1987-08-10 | |||
| JPS6473152A | 1989-03-17 | |||
| JPS62279252A | 1987-12-04 | |||
| JPS59141735A | 1984-08-14 |
Other References:
See also references of EP 0504401A4
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