Title:
TWO-STROKE ENGINE
Document Type and Number:
WIPO Patent Application WO/2018/135191
Kind Code:
A1
Abstract:
Provided is a two-stroke engine that does not require the use of a high-pressure injection system, and in which pass-through can be suppressed by stratified scavenging even when applied to a long-stroke engine. This two-stroke engine comprises: a scavenging port 55 that is in communication with a crank chamber 2A and a side part of a cylinder 22, the connection and disconnection of the scavenging port to/from the cylinder 22 being switched by a piston 23; and a plurality of fuel injection valves 68 (68A, 68B) that inject a fuel to the scavenging port 55. Since the fuel injection valves 68 inject the fuel to the scavenging port 55, there is no need to use a high-pressure injection system. By delaying the start of fuel injection from the timing that the scavenging port 55 is opened, fresh charge is fed into the cylinder 22 at an initial period of scavenging, and a gas mixture is fed into the cylinder 22 at a latter period of the scavenging. Thus, stratified scavenging is performed even in a long-stroke engine, and the gas mixture is suppressed from passing through.
Inventors:
KURATA MASHU (JP)
Application Number:
PCT/JP2017/044565
Publication Date:
July 26, 2018
Filing Date:
December 12, 2017
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
International Classes:
F02B25/04; F02B17/00
Domestic Patent References:
| WO2016072391A1 | 2016-05-12 |
Foreign References:
| JP2014145289A | 2014-08-14 | |||
| JP2012154189A | 2012-08-16 | |||
| JP2016035216A | 2016-03-17 |
Attorney, Agent or Firm:
OSHIMA & PARTNERS (JP)
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