DIRECT CYLINDER INJECTION INTERNAL COMBUSTION ENGINE

Japanese Patent JP2004360539

A

To perform stratified charge combustion operation excellent in fuel economy or exhaust emission , in a wide operation range.

A fuel injection valve is disposed at an approximately center position of an upper face of a combustion chamber, and an ignition plug is disposed adjacently to the fuel injection valve. An approximately cylindrical cavity is formed at a center position of the crown surface of a piston. Two stratified charge combustion modes are provided as follows: a first stratified charge operation mode (mode 1) igniting fuel during fuel injection or immediately after the completion of the fuel injection and before a collision with a piston; and a second stratified charge operation mode (mode 2) igniting the fuel after the completion of the fuel injection and has passed through the piston. In the first stratified charge mode, when a smoke emission amount or a CO emission amount exceeds a switching level, the first stratified mode is switched to the second stratified charge mode (mode 2). In the second stratified charge mode, when combustion stability exceeds a switching level, the second stratified charge mode is switched to the first stratified charge mode (mode 1).

JPS5261606	2-CYCLE ENGINE WITH SPARK PLUG IGNITION
JP2007309277	CYLINDER INJECTION TYPE SPARK IGNITION INTERNAL COMBUSTION ENGINE
JP3037515	TWO-POINT IGNITION ENGINE

KAKUHO AKIHIKO
HIRATANI KOJI
TAKAHASHI EIJI

JP2003158878A

December 24, 2004

June 04, 2003

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NISSAN MOTOR

F02B17/00; F02B23/10; F02D41/02; F02D45/00; F02F3/26; (IPC1-7): F02D41/02; F02B17/00; F02B23/10; F02D45/00; F02F3/26

Tsuyoshi Hashimoto
Hiromichi Kobayashi
Tomioka Kiyoshi

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