초록 ▼

In an accumulator type fuel injection control device, a feed hole (28) provides communication between a common rail (24) for storing fuel from a fuel pressure pump (29) and a fuel injection valve (11); a control oil passage (23a, 23b, 23c) extends from the feed hole (28) to an oil chamber (19); a th

In an accumulator type fuel injection control device, a feed hole (28) provides communication between a common rail (24) for storing fuel from a fuel pressure pump (29) and a fuel injection valve (11); a control oil passage (23a, 23b, 23c) extends from the feed hole (28) to an oil chamber (19); a three-way electromagnetic valve (23) exerts the pressure of a fuel oil on the oil chamber (19) to close a needle valve (15), and discharges the fuel oil in the oil chamber (19) to a fuel return passage (51) to open the needle valve (15); fuel oil pressure correcting means (103) corrects a fuel oil pressure P.sub.0 on the basis of a fuel oil temperature t.sub.F detected by fuel oil temperature detecting means (44); and simultaneously, fuel injection volume correcting means (108) corrects a fuel injection volume Q.sub.0 ; whereby the temperature of fuel flowing to a fuel return system is suppressed to prevent damage to members used in the fuel return system.

대표청구항 ▼

[ What is claimed is:] [1.] An accumulator type fuel injection control device, comprisingan accumulator for accumulating the pressure of a fuel which is fed under pressure from a fuel pressure pump and for storing the fuel oil;a feed passage which provides a path between the accumulator and an injec

[ What is claimed is:] [1.] An accumulator type fuel injection control device, comprisingan accumulator for accumulating the pressure of a fuel which is fed under pressure from a fuel pressure pump and for storing the fuel oil;a feed passage which provides a path between the accumulator and an injection fuel reservoir in a fuel injection valve;a control passage branched at one end thereof from the feed passage and leading at the other end thereof to a fuel chamber which is formed within the fuel injection valve and which serves to control the opening and closing of a needle valve;a fuel injection control valve disposed in the control passage, for exerting the pressure of the fuel on the chamber to close the needle valve disposed within the fuel injection valve, and for discharging the fuel present in the fuel chamber to a fuel return passage to open the needle valve, thereby allowing fuel injection to be performed;fuel oil temperature detecting means for detecting the temperature of the fuel;fuel oil pressure correcting means for correcting the pressure of the fuel on the basis of the temperature of the fuel detected by the fuel temperature detecting means; andfuel injection volume correcting means for correcting the fuel injection volume simultaneously with the fuel pressure correcting means.