Internal-combustion engines – Charge forming device – With fuel pump
Patent
1998-06-04
1999-03-09
Miller, Carl S.
Internal-combustion engines
Charge forming device
With fuel pump
123385, F02M 3900
Patent
active
058787216
ABSTRACT:
The pump controller determines pump load torques (T.sub.r1, T.sub.r2) from tilting signals (.theta..sub.1, .theta..sub.2) of hydraulic pumps and delivery pressure signals ( P.sub.D1, P.sub.D2) of the hydraulic pumps based on T.sub.r1 =K.multidot..theta..sub.1 .multidot.P.sub.D1 and T.sub.r2 =K.multidot..theta..sub.2 .multidot.P.sub.D2 (K: constant), and adds these pump load torques to provide a resulting value as an engine load torque signal (T). Using the signal (T) and an engine revolution speed signal, an engine controller determines a fuel injecting rate to control a pre-stroke actuator. Simultaneously, the engine controller calculates target injection timing not to change fuel injection start timing, thereby controlling a timer actuator. This makes it possible to control the fuel injection rate with good response and high accuracy following load fluctuation, achieve improved combustion, and hold a fuel injection period within an optimum angle range. As a result, optimum combustion is achieved and such a deterioration of exhaust gas as the generation of NO.sub.x and black smoke can be avoided.
REFERENCES:
patent: Re30189 (1980-01-01), Perr
patent: 4211203 (1980-07-01), Kobayashi
patent: 4275691 (1981-06-01), Wolff
patent: 4638779 (1987-01-01), Kitada
patent: 4774921 (1988-10-01), Sakaguchi
patent: 4838755 (1989-06-01), Johnson
patent: 5447138 (1995-09-01), Barnes
patent: 5468126 (1995-11-01), Lukich
patent: 5613474 (1997-03-01), Nakamura
patent: 5619969 (1997-04-01), Liu
patent: 5755209 (1998-05-01), Fischer
Mechanization of Construction, Dec. 1996, No. 562, "Overview and Inspection/Servicing of Diesel Engine Adapted for Exhaust Gas Regulation", p. 63.
Hitachi Construction Machinery Co. Ltd.
Miller Carl S.
LandOfFree
Engine control system for construction machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Engine control system for construction machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine control system for construction machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1311551