Global patent index - EP 0971110 A1

EP 0971110 A1 2000-01-12 - 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

EP 0971110 A1 (EN)

Application

EP 98944286 A

Priority

  • JP 9804360 W
  • JP 28783097 A

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 (main, further and additional classification)

F02B 25/16; F02B 23/00

IPC 8 full level (invention and additional information)

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 (invention and additional information)

F02B 25/14 (2013.01); F02B 17/00 (2013.01); F02B 2075/025 (2013.01)

Designated contracting state (EPC)

DE FR GB IT SE

EPO simple patent family

WO 9918338 A1 19990415; AU 9186898 A 19990427; EP 0971110 A1 20000112; EP 0971110 A4 20000906; JP H11107761 A 19990420

INPADOC legal status

2002-06-12 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20011204

2001-03-07 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010118

2001-01-10 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: KOMATSU ZENOAH CO.

- Ref Legal Event Code: RAP1

2001-01-10 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: PETROLEUM ENERGY CENTER

- Ref Legal Event Code: RAP1

2000-09-06 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20000721

2000-09-06 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IT SE

2000-01-12 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990120

2000-01-12 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR GB IT SE