WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Options
Query Language
Stem
Sort by:
List Length
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/033060 International Application No.: PCT/JP2000/007368
Publication Date: 10.05.2001 International Filing Date: 23.10.2000
Chapter 2 Demand Filed: 08.03.2001
IPC:
F02B 3/06 (2006.01) ,F02B 23/06 (2006.01) ,F02D 41/06 (2006.01) ,F02D 41/40 (2006.01) ,F02F 3/26 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
B
INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
3
Engines characterised by air compression and subsequent fuel addition
06
with compression ignition
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
B
INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23
Other engines characterised by special shape or construction of combustion chambers to improve operation
02
with compression ignition
06
the combustion space being arranged in working piston
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
41
Electrical control of supply of combustible mixture or its constituents
02
Circuit arrangements for generating control signals
04
Introducing corrections for particular operating conditions
06
for engine starting or warming up
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
41
Electrical control of supply of combustible mixture or its constituents
30
Controlling fuel injection
38
of the high pressure type
40
with means for controlling injection timing or duration
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F
CYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
3
Pistons
26
having combustion chamber in piston head
Applicants: ASAI, Gou[JP/JP]; JP (UsOnly)
IMAMORI, Toshikazu[JP/JP]; JP (UsOnly)
YANMAR DIESEL ENGINE CO., LTD.[JP/JP]; 1-32, Chaya-machi, Kita-ku Osaka-shi, Osaka 530-0013, JP (AllExceptUS)
Inventors: ASAI, Gou; JP
IMAMORI, Toshikazu; JP
Agent: AOYAMA, Tamotsu ; Aoyama & Partners IMP Building 3-7, Shiromi 1-chome, Chuo-ku Osaka-shi, Osaka 540-0001, JP
Priority Data:
11/30887329.10.1999JP
2000-18782622.06.2000JP
Title (EN) DIRECT INJECTION TYPE DIESEL ENGINE
(FR) MOTEUR DIESEL A INJECTION DIRECTE
Abstract:
(EN) A direct injection type diesel engine (100) capable of reducing the amount of CO (carbon monoxide) in the exhaust gas at the time of cold start and at the time of high idle and also reducing the concentration of blue and white smoke at the time of cold start and at the time of idle when the engine is cold, the engine comprising a combustion chamber (10) formed recessedly in a piston top surface (90a), a fuel injection device (3) having both a first mode for injecting fuel (14) one time continuously in one cycle and a second mode for injecting fuel (14) multiple times in one cycle, and switching means (4) switching between the first mode and the second mode, wherein the second mode is switched to by the switching means (4) at least in either of a case of high idle operation where the engine (100) is not loaded and engine speed is high and a case of cold start of the engine (100), whereby the fuel (14) is compressed and ignited by itself before the injected fuel (14) reaches a combustion chamber wall surface (91).
(FR) L'invention concerne un moteur diesel(100) à injection directe capable de réduire d'une part, la quantité de CO (monoxyde de carbone) dans les gaz d'échappement, que ce soit au démarrage à froid ou à un régime très ralenti, et d'autre part, la concentration de fumée bleue et blanche au démarrage à froid et au ralenti lorsque le moteur est froid. Ledit moteur comprend une chambre (10) de combustion formée en évidement dans une surface supérieure (90a) du piston, un dispositif (3) d'injection de carburant pouvant fonctionner, selon un premier mode, pour injecter le carburant (14) en une seule fois, en continu, au cours d'un cycle, et selon un second mode, pour injecter le carburant (14) en plusieurs fois au cours d'un cycle, et des moyens (4) de commutation permettant la commutation entre le premier et le second mode, lesdits moyens (4) de commutation provoquant le passage en second mode soit dans le cas d'un régime très ralenti où le moteur (100) n'est pas chargé et où la vitesse du moteur est élevée, soit dans le cas du démarrage à froid du moteur (100), où le carburant (14) est comprimé et s'enflamme de lui-même avant que le carburant injecté (14) atteigne la surface (91) d'une paroi de la chambre de combustion.
front page image
Designated States: BR, CN, KR, NO, SG, US
European Patent Office (EPO) (AT, DE, DK, FI, GB)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)