Title:
【発明の名称】筒内直接噴射式火花点火機関
Document Type and Number:
Japanese Patent JP2748686
Kind Code:
B2
Abstract:
An internal combustion engine includes fuel injectors which directly inject high pressure fuel into combustion chambers of the engine. Spark plugs are provided in the combustion chambers, a catalytic converter is provided in the middle of the exhaust pipe for purifying the exhaust, and a temperature sensor is provided for detecting the temperature of a catalyst of the catalytic converter. A control unit which receives as input the engine rotational speed, load, and the detection value of the catalyst temperature sensor controls the engine such that, when the temperature of the catalyst is lower than a predetermined target temperature, the fuel injectors inject additional fuel into the combustion chambers during at least one of the expansion stroke and the exhaust stroke to mix the fuel with the exhaust. Thereafter, the exhaust having the additional fuel mixed in is reignited upstream of the catalytic converter to heat the catalyst to the target temperature.
Inventors:
SASAKI SHIZUO
UEDA TAKANOBU
UEDA TAKANOBU
Application Number:
JP30862790A
Publication Date:
May 13, 1998
Filing Date:
November 16, 1990
Export Citation:
Assignee:
TOYOTA JIDOSHA KK
International Classes:
F01N3/20; F01N3/24; F01N3/36; F01N3/38; F02B23/10; F02D35/00; F02D41/02; F02D41/04; F02D41/06; F02D41/34; F02D41/40; F02F1/42; F02F3/26; F02P15/08; F02B75/12; F02F1/24; (IPC1-7): F01N3/20; F01N3/24; F01N3/36; F02D41/02; F02D41/06; F02D41/34
Domestic Patent References:
| JP2169834A |
Attorney, Agent or Firm:
Aoki Akira (4 outside)