ENGINE CONTROL SYSTEM AND CONTROL METHOD

Japanese Patent JP3911912

B2

PROBLEM TO BE SOLVED: To reconcile ignitability and torque controllability by sequentially performing a first injection for controlling the initial combustion speed before ignition and performing a second injection for controlling engine torque to increase the engine torque and enlarge a second injection ratio in a cylinder injection engine having a compression ignition mode.
SOLUTION: By a controller 12, a fuel injection quantity is calculated according to a target engine torque and an engine rotating speed, and an intake compression injection ration (first and second injection ratio) is decided to control the intake injection and compression injection from a fuel injection valve 1. When the torque fluctuation is an allowable value or more, the intake injection ratio is increased to promote the generation of a radical. When knocking is caused, the intake injection ratio is decreased, and variable valves 40, 41 are controlled through a variable valve driving circuit 30 to reach a target EGR, thereby controlling the internal EGR. External EGR is used for a portion unsatisfied by the internal EGR.

Toshiharu Nogi
Takuya Shiraishi
Minoru Osuka
Noboru Tokuyasu
Yoko Nakayama
Yutaka Takahisa

JP17629199A

May 09, 2007

June 23, 1999

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株式会社日立製作所

F02D41/38; F02P9/00; F01L1/34; F01L9/20; F02B11/00; F02B23/10; F02D13/02; F02D17/00; F02D21/08; F02D41/02; F02D41/30; F02D41/40; F02D43/00; F02D45/00; F02M25/07; F02P5/15; F02P23/04; F16K31/06; F02B1/12; F02B75/12; (IPC1-7): F02D41/38; F02D13/02; F02D17/00; F02D21/08; F02D41/02; F02D43/00; F02D45/00; F02M25/07; F02P5/15; F02P9/00; F16K31/06

JP11006436A
JP7189767A
JP3160142A
JP61200319A

Manabu Inoue

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