| (19) |
 |
|
(11) |
EP 0 337 768 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
25.04.1990 Bulletin 1990/17 |
| (43) |
Date of publication A2: |
|
18.10.1989 Bulletin 1989/42 |
| (22) |
Date of filing: 12.04.1989 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
14.04.1988 GB 8808855
|
| (71) |
Applicant: Tait, Robert John |
|
Shipston-on-Stour
Warwickshire CV36 4NZ (GB) |
|
| (72) |
Inventor: |
|
- Tait, Robert John
Shipston-on-Stour
Warwickshire CV36 4NZ (GB)
|
| (74) |
Representative: Chettle, Adrian John et al |
|
Withers & Rogers
4, Dyer's Buildings
Holborn
London EC1N 2JT
London EC1N 2JT (GB) |
|
| |
|
| (54) |
An Internal combustion engine |
(57) A two-stroke internal combustion engine has a duplex piston (48) slidable in co-axial
cylinders (18,28). The engine has an inlet (15) for air/fuel mixture, an air inlet
(29) and an exhaust outlet (36), and the combustion chamber has air inlet ports (32)
and air/fuel transfer ports (34). The piston is arranged to pump a fresh air charge
into the combustion chamber slightly in advance of the air/fuel charge to assist in
scavenging and avoid unburnt fuel being passed directly to exhaust. The crankcase
may or may not be used for charge compression.