Internal-combustion engines – Engine speed regulator – Having condition responsive means with engine being part of...
Patent
1998-05-21
2000-02-08
Moulis, Thomas N.
Internal-combustion engines
Engine speed regulator
Having condition responsive means with engine being part of...
123501, 417 34, F02D 4140
Patent
active
060217561
ABSTRACT:
The pump controller 40 determines pump load torques T.sub.r1, T.sub.r2 from tilting signals .theta..sub.1, .theta..sub.2 of hydraulic pumps 1, 2 and delivery pressure signals P.sub.D1, P.sub.D2 of the hydraulic pumps 1, 2 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, an engine controller 50 calculates fuel injecting timing depending on the engine load torque to control a timer actuator 55. This makes it possible to control the fuel injection timing with good response and high accuracy following load fluctuation, achieve optimum combustion, and prevent such a deterioration of exhaust gas as caused by the generation of No.sub.x.
REFERENCES:
patent: 5468126 (1995-11-01), Lukich
patent: 5680842 (1997-10-01), Schmid
patent: 5765995 (1998-06-01), Springer
patent: 5878721 (1999-03-01), Nakamura
Mechanization of Construction, 1996 Dec., No. 562, "Overview and Inspection/Servicing of Diesel Engine Adapted for Exhaust Gas Regulation", p. 63.
Hitachi Construction Machinery Co. Ltd.
Moulis Thomas N.
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