Patent
Stratified scavenging two-cycle engine
TLDR
In this paper, a stratified scavenging two-cycle engine consisting of a scavenging flow passage (3) for connection between a cylinder chamber (4a) and a crank chamber (1a), an air flow passage(2) connected to the scavenging passage, and mixture flow rate control means (11) for controlling a flow rate of mixture sucked into the crank chamber from a mixture flow passage.Abstract:
A stratified scavenging two-cycle engine, in which control of an air flow rate provides a favorable accelerating performance and can prevent deterioration of exhaust gas. The stratified scavenging two-cycle engine comprises a scavenging flow passage (3) for connection between a cylinder chamber (4a) and a crank chamber (1a), an air flow passage (2) connected to the scavenging flow passage (3), air flow rate control means (12) for controlling a flow rate of air fed to the scavenging flow passage (3) from the air flow passage (2), and mixture flow rate control means (11) for controlling a flow rate of mixture sucked into the crank chamber (1a) from a mixture flow passage (10). The air flow rate control means (12) throttles an air flow rate at the time of acceleration. Alternatively, the air flow rate control means (12) is opened later than the mixture flow rate control means (11) at the time of acceleration.read more
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Stratified scavenging 2-cycle engine
TL;DR: In this article, the authors proposed a connecting mechanism for interlocking an air control valve with a throttle valve between them, totally closing the air-control valve until the throttle valve reaches a designated opening, and making both valves operated in proportion to each other when it reaches the designated opening or more.
Patent
Two-stroke internal combustion engine
TL;DR: A two-stroke internal combustion engine has an air passageway for introducing air into a scavenging passagway communicating a combustion/actuating chamber disposed above a piston with a crankcase and an air-fuel supply passageways for introducing an air fuel mixture from a carburetor into the combustion/acting chamber.
Patent
Two-stroke cycle engine
TL;DR: In this paper, a two-stroke cycle engine with a preceding air-layer for scavenging is described, and the engine has a removable guide with a surface forming a curved smooth channel which is attachable to the scavenger passage in the crankcase from the mounting surface.
Patent
Two-cycle internal combustion engine
TL;DR: In this article, a Schnurle type scavenging passageways were constructed for a two-cycle internal combustion engine to prevent air-fuel mixture from being mixed with the air introduced in advance into the combustion actuating chamber during the scavenging period, thereby realizing a complete lamellar scavenging.
Patent
Stratified scavenging carburetor
TL;DR: In this article, the authors propose a stratified scavenging carburetor with a lost motion coupling that allows limited relative movement of a throttle valve relative to an air valve so that initial opening of the throttle valve off idle does not open the air valve to avoid diluting with scavenging air the fuel and air mixture delivered to an engine.
References
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Patent
Crankcase scavenged two-stroke engines
TL;DR: In this paper, a two-stroke engine with an exhaust port and a rear tranfer port is described, where the exhaust port is formed in the position between the rear transfert port (24) and the exhhaust port (22).
Patent
Two cycle internal combustion engines
TL;DR: In this article, a reed type check valve with at least one of the scavenging passages at the upper portion thereof is connected with the engine throttle valve to control the amount of air supply through the air passage in accordance with the load condition of the engine operation.
Patent
Stratified-charge two-stroke internal combustion engines
TL;DR: In a two-stroke internal combustion engine, a duct and at least one further passage extends between the crankcase chamber and the combustion chamber as mentioned in this paper, where the fuel/air mixture is separated from the exhaust port by a layer of air leading to better fuel consumption and higher oxidation combustion products.
Patent
Two-cycle engine with pure air scavenging
TL;DR: A two-cycle internal combustion engine includes a cylinder, a piston in the cylinder and a crankcase pump as discussed by the authors, which is divided into a first chamber and a second chamber by a membrane.
Patent
Continuously variable volume scavenging passage for two-stroke engines
TL;DR: In this paper, a variable volume transfer duct for maintaining an optimum volume of buffer gas in the transfer duct of a two-stroke engine during operation in order to minimize short circuit loss of fresh charge at all load levels during engine operation.