EP 0971110 A1 20000112 - STRATIFIED SCAVENGING TWO-CYCLE ENGINE
Title (en)
STRATIFIED SCAVENGING TWO-CYCLE ENGINE
Title (de)
ZWEITAKTMOTOR MIT SCHICHTSPÜLUNG
Title (fr)
MOTEUR A DEUX TEMPS A BALAYAGE STRATIFIE
Publication
Application
Priority
- JP 9804360 W 19980929
- JP 28783097 A 19971003
Abstract (en)
The present invention relates to a stratified scavenging two-cycle engine whose simple configuration can satisfy the regulation of emission rate of THC in exhaust gas. To this end, the stratified scavenging two-cycle engine includes a cylinder (4) housing a piston (1) to be vertically slidable and having an exhaust port (14) and a scavenging port (16) in a side wall, a scavenging flow passage (22) for connection between a crank chamber (8) and the scavenging port (16), an air supply flow passage (24) connected to the scavenging flow passage (22) and supplying air through a check valve (26), and a mixture supply flow passage (20) supplying mixture to the crank chamber (8). The supply quantity ratio R = qa / Qf, which is the ratio of a supply quantity qa of air flowing through the air supply flow passage (24) to a supply quantity Qf of mixture flowing through the mixture supply flow passage (20) during a suction stroke in which pressure in the crank chamber (8) is negative, is 0.7 </= R </= 1.4. <IMAGE>
IPC 1-7
IPC 8 full level
F02B 17/00 (2006.01); F02B 25/14 (2006.01); F02B 25/16 (2006.01); F02B 25/22 (2006.01); F02B 75/02 (2006.01)
CPC (source: EP)
F02B 17/00 (2013.01); F02B 25/14 (2013.01); F02B 2075/025 (2013.01)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
WO 9918338 A1 19990415; AU 9186898 A 19990427; EP 0971110 A1 20000112; EP 0971110 A4 20000906; JP H11107761 A 19990420
DOCDB simple family (application)
JP 9804360 W 19980929; AU 9186898 A 19980929; EP 98944286 A 19980929; JP 28783097 A 19971003