Single solenoid unit injector

Details Single solenoid unit injector Single solenoid unit injector

1979-01-25

1981-08-04

Schacher, Richard A.

Fluid sprinkling, spraying, and diffusing

Processes

Of fuel injection

239 90, 239 91, 239 95, 123502, F02M 4702

Patent

active

042817927

ABSTRACT:
A fuel injector (10) is provided for each cylinder of an internal combustion engine, the injector including an electronically operated control valve (146) disposed between supply passage 42 and a timing chamber (98) to control the admission of fuel into and out of the timing chamber. A primary pumping plunger (62) and a secondary plunger (90) are axially spaced within the central bore of the injection body, and a normally closed injection nozzle (14) is situated at one end of the injector body. A mechanical linkage (27, 28, 30) associated with the camshaft of the engine drives the primary pumping plunger (62) against the bias of a main spring (18). The timing chamber (98) is defined between the plungers (62, 90) and a metering chamber (128) is defined between the secondary plunger (90) and the nozzle (14).
An electronic control unit (52) responds to engine operating conditions, and delivers a timing and metering signal to the control valve (146) to close the valve and seal the timing chamber for a controlled period of time. The sealed timing chamber forms a hydraulic link, so that the plungers (62, 90) move in concert during the injection and metering phases of the cycle of operation. When the signal from the ECU is terminated, the control valve opens, and breaks the link so that the primary plunger (62) moves independently of the secondary plunger (90) which is biased in a set position by a spring (96) after termination of the control signal.
The timing function can be adjusted by the ECU relative to any preselected position of the crankshaft to optimize engine performance, while the metering function is achieved in a proportionate manner relative to the degree of camshaft rotation. A cam (22), having a linear portion, controls the mechanical linkage, and thus the primary pumping plunger (62), to produce the proportional metering function.

REFERENCES:
patent: 3802626 (1974-04-01), Regneault
patent: 3982694 (1976-09-01), Bailey

Affiliated with

Also associated with

Rating

Single solenoid unit injector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single solenoid unit injector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single solenoid unit injector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-235552