METHOD FOR CONTROLLING FUEL INJECTION RATE OF HYDRAULICALLY-ACTUATED FUEL INJECTION SYSTEM

Japanese Patent JP3952215

B2

PROBLEM TO BE SOLVED: To improve the starting performance of an engine by obtaining the injection rate based on the engine speed signal and the engine temperature signal, obtaining the actuating fluid pressure based on the engine speed signal and the viscosity signal, and controlling the fuel injection rate according to the actuating fluid pressure signal.
SOLUTION: The engine speed and the engine cooling liquid temperature are measured, and a desired injection rate signal rd is outputted by an injection rate block 305 based on the measurement signals sf, Tc. The injection rate signal rd is inputted in an actuating fluid pressure block 310 together with the actuating fluid viscosity, signal v to obtain the desired actuating fluid pressure signal pd, and the obtained actuating fluid pressure signal pd is compared in the block 315 with the present actuating fluid pressure signal pd obtained by a block 330 to generate the actuating fluid pressure error signal pe. An injector actuating pressure control valve is controlled by the actuating fluid pressure error signal pe through a PI control block 320 to maintain the fuel injection rate at an appropriate value.

Travis Eburns
Brian E. Yuren Haake

JP16944295A

August 01, 2007

July 05, 1995

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CATERPILLAR INCORPORATED

F01M1/16; F02D41/40; F02D41/06; F02D45/00; F02M45/00; F02M47/00; F02M57/02; F02M59/10; (IPC1-7): F02D41/40; F01M1/16; F02D45/00; F02D45/00; F02M45/00; F02M47/00

JP6002632A
JP63009672A
JP49100016U
JP60040776A

WO1993007380A1
WO1993007378A1

Minoru Nakamura
Fumiaki Otsuka
Shishido Kaichi
Hideto Takeuchi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo

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