US 11,913,371 B2
Air-leading type stratified scavenging two-stroke internal combustion engine, and engine working machine
Yuta Kobayashi, Tokyo (JP); and Takahiro Yamazaki, Tokyo (JP)
Assigned to YAMABIKO CORPORATION, Tokyo (JP)
Appl. No. 17/765,843
Filed by YAMABIKO CORPORATION, Tokyo (JP)
PCT Filed Sep. 24, 2020, PCT No. PCT/JP2020/035976
§ 371(c)(1), (2) Date Apr. 1, 2022,
PCT Pub. No. WO2021/065660, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 2019-183639 (JP), filed on Oct. 4, 2019.
Prior Publication US 2022/0325659 A1, Oct. 13, 2022
Int. Cl. F02D 41/04 (2006.01); F02B 25/20 (2006.01); F02M 7/12 (2006.01)
CPC F02B 25/20 (2013.01) [F02D 41/042 (2013.01); F02M 7/12 (2013.01); F02D 2200/021 (2013.01); F02D 2200/101 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An air leading type stratified scavenging two-stroke internal combustion engine, comprising:
an air passage configured to allow supply of air to a scavenging passage configured to allow communication between a crank chamber and a combustion chamber;
at least one sensor configured to detect an operating condition of the engine; and
a fuel valve configured to control fuel supply to the air passage based on detection performed by the at least one sensor,
wherein
the fuel supply to the air passage is controlled by the fuel valve at times other than start and idling of the engine or at needed times in addition to the start or the idling of the engine, and
the at least one sensor includes any one of a sensor configured to estimate a temperature of the engine, a sensor configured to estimate an accelerating operation of the engine, which is performed by an operator, and a sensor configured to estimate a decelerating operation of the engine, which is performed by the operator.