EP 0631040 B1 19980304 - Four-stroke internal combustion engine
Title (en)
Four-stroke internal combustion engine
Title (de)
Viertakt Brennkraftmaschine
Title (fr)
Moteur à combustion interne à quatre temps
Publication
Application
Priority
- US 8267793 A 19930625
- US 21916494 A 19940401
Abstract (en)
[origin: EP0631040A1] A four-stroke engine comprising an engine frame including a block (111) and a head (113), the block forming at least one cylinder (114) and a crankcase (112). A piston (116) is mounted for reciprocation in the cylinder (114), and a crank (117) and connecting rod (118) are mounted in the crankcase (112) and connected to the piston (116). The crankcase (112) includes a fuel inlet port (128) and an outlet port, and a duct connects the outlet port (131) to an intake passage (132) in the head. The inlet port (128) is connected to a supply of a combustible mixture comprising fuel, lubricating oil and air. During engine operation, the mixture flows through the crankcase (112), the duct (132), and the air intake passage (128) to the cylinder (114). Valves (119,120) and valve actuating mechanisms control the flow of the mixture to the cylinder (114) and the flow of exhaust from the cylinder. The oil in the mixture lubricates the engine parts in the crankcase (112), the valves (119,120) and the valve actuating mechanisms. The duct (132) preferably forms a plenum or surge tank containing the mixture under pressure. The engine may include more than one cylinder and piston, such as a two-cylinder engine having pistons which move in synchronism to produce crankcase compression. <IMAGE>
IPC 1-7
IPC 8 full level
F01B 7/04 (2006.01); F01B 23/06 (2006.01); F01M 3/00 (2006.01); F01M 3/04 (2006.01); F02B 33/26 (2006.01); F02B 63/02 (2006.01); F02B 75/02 (2006.01); F02B 75/16 (2006.01); F02B 75/24 (2006.01); F02B 75/34 (2006.01); F02B 75/18 (2006.01)
CPC (source: EP)
F01M 3/04 (2013.01); F02B 33/26 (2013.01); F02B 63/02 (2013.01); F02B 75/16 (2013.01); F02B 75/243 (2013.01); F02B 75/34 (2013.01); F02B 2075/027 (2013.01); F02B 2075/1808 (2013.01); F02B 2275/22 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IE IT LI LU NL PT SE
DOCDB simple family (publication)
EP 0631040 A1 19941228; EP 0631040 B1 19980304; AT E163733 T1 19980315; AU 5942494 A 19950105; BR 9402438 A 19950124; CA 2122424 A1 19941226; CA 2122424 C 19990525; CZ 156094 A3 19950412; DE 69408735 D1 19980409; DE 69408735 T2 19980625; ES 2115798 T3 19980701; HU 9401531 D0 19940829; HU T70994 A 19951128; IL 109680 A0 19940826; JP H07150920 A 19950613; NO 941771 D0 19940511; NO 941771 L 19941227; NZ 260499 A 19960625; PL 303491 A1 19950109
DOCDB simple family (application)
EP 94106092 A 19940420; AT 94106092 T 19940420; AU 5942494 A 19940413; BR 9402438 A 19940616; CA 2122424 A 19940428; CZ 156094 A 19940624; DE 69408735 T 19940420; ES 94106092 T 19940420; HU 9401531 A 19940518; IL 10968094 A 19940518; JP 11174894 A 19940428; NO 941771 A 19940511; NZ 26049994 A 19940510; PL 30349194 A 19940517