Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1991-10-11
1993-01-26
Cross, E. Rollins
Internal-combustion engines
Charge forming device
Fuel injection system
12317917, 123381, F02M 4700
Patent
active
051814943
ABSTRACT:
In a hydraulically-actuated electronically-controlled unit injector, the viscosity of the actuating fluid used to actuate the unit injector varies with ambient temperature and affects the magnitude of pressure drops in the actuating fluid circuit. Such variations in viscosity affect the magnitude of the fuel delivery command pulsewidth and/or actuating fluid pressure required for engine startup versus that required for normal engine operation. The present invention provides an improved hydraulically-actuated electronically-controlled unit injector and methods of operation which compensate for variations in the viscosity of the actuating fluid used to hydraulically actuate a piston. The stroke of the piston is controlled electronically and/or mechanically in order to achieve an appropriate amount of fuel injection.
REFERENCES:
patent: Re33270 (1990-07-01), Beck et al.
patent: 2793077 (1957-05-01), Bovard
patent: 3689205 (1972-09-01), Links
patent: 3753426 (1973-08-01), Lilley
patent: 3796205 (1974-03-01), Links et al.
patent: 3827409 (1974-08-01), O'Neill
patent: 3835829 (1974-09-01), Links
patent: 4148282 (1979-04-01), Grassle et al.
patent: 4219154 (1980-08-01), Luscomb
patent: 4221192 (1980-09-01), Badgley
patent: 4271807 (1981-06-01), Links et al.
patent: 4346681 (1982-08-01), Schleicher et al.
patent: 4372272 (1983-02-01), Walter et al.
patent: 4437445 (1984-03-01), Takahashi et al.
patent: 4448169 (1984-05-01), Badgley et al.
patent: 4449507 (1984-05-01), Mayer
patent: 4459959 (1984-07-01), Terada et al.
patent: 4541390 (1985-09-01), Steinbrenner et al.
patent: 4582036 (1986-04-01), Kiuchi et al.
patent: 4583506 (1986-04-01), Okamoto
patent: 4605166 (1986-08-01), Kelly
patent: 4628881 (1986-12-01), Beck et al.
patent: 4669429 (1987-06-01), Nishida et al.
patent: 4719885 (1988-01-01), Nagano et al.
patent: 4765300 (1988-08-01), Fujimura et al.
patent: 4765301 (1988-08-01), Koike et al.
patent: 4838230 (1989-06-01), Natsuoka
patent: 4841936 (1989-06-01), Takahashi
patent: 4867115 (1989-09-01), Henein
patent: 4884545 (1989-12-01), Mathis
patent: 5033435 (1991-09-01), Ostarello et al.
patent: 5058553 (1991-10-01), Kondo et al.
SAE Paper No. 910252, Development of New Electronically Controlled Fuel Injection System ECD-U2 for Diesel Engines, Published 1991, By Miyaki et al.
Ausman Thomas G.
Longman Douglas E.
Stockner Alan R.
Caterpillar Inc.
Cross E. Rollins
Moulis Thomas N.
Woloch Anthony N.
LandOfFree
Hydraulically-actuated electronically-controlled unit injector h does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulically-actuated electronically-controlled unit injector h, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulically-actuated electronically-controlled unit injector h will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1407489