Kioritz Corporation

Takashi Fukuoka

Yoshikiyo Kamata

Yoshiaki Nagao

Mitsujiro Mochizuka

Hiroyuki Tanaka

Fujio Kobayashi

Isao Masuda

Hisashi Inaga

Shiro Yamaguchi

Masakuni Hiroshima

A two-stroke internal combustion engine that emits exhaust gases with reduced amounts of noxious components, such as HC, and has less blow-by of unburned air-fuel mixture has a crank chamber located below a piston and a combustion actuating chamber located above the piston. Either one pair or two pairs of scavenging passageways communicate the crank chamber with the combustion actuating chamber, the scavenging passageways of the one pair or of each of the two pairs being disposed symmetrically with respect to a plane that bisects an exhaust port so as to form a Schn&uuml;rle-type scavenging system. Each scavenging passageway is throttled at a location proximate to a scavenging inlet port thereof.

Two-stroke internal combustion engine

A two-cycle internal combustion engine comprising a cylinder including an exhaust outlet and scavenging paths formed in the inner wall thereof, and a piston including openings formed in its peripheral wall at positions near respective piston-pin bosses thereof, the respective upper ends of the scavenging paths serving as scavenging ports which are opened and closed through reciprocating movement of the piston and the openings being so arranged as to communicate with the scavenging paths at positions nearer to the exhaust outlet of the cylinder.

Two-cycle internal combustion engine

Disclosed is a two-cycle internal combustion engine including a protruding edge portion formed in a section of a lower side surface of an intake port which is adjacent to a pre-compression chamber of a cylinder. This protruding edge portion serves to deflect air-fuel mixture introduced into the pre-compression chamber through the intake port so as to direct it to a bearing portion provided between a piston and a connecting rod. Further, a cut-in groove is formed in the protruding edge section and is adapted to allow any liquid remaining in the intake port to flow into the pre-comparison chamber.

A vibration damper comprising; a main body which is formed from an elastic material into a substantially cubic overall form; and fixtures which are attached to each of two surfaces of the main body which are adjacent each other.

Vibration damper

A reed valve includes a main reed member and an auxiliary reed member which is overlaid on the outside surface of the main reed valve. The auxiliary reed member has a smaller length than that of the main reed member. The width of the auxiliary reed member is gradually decreased from its fixed end to its free end.

Reed valve

Disclosed in an exhaust muffler for internal combustion engine such as opposed twin cylinder 2-cycle internal combustion engine of simultaneous ignition type for driving a chain saw. The muffler is connected at a plurality of points thereof to portions of the engine such as cylinders, characterized by comprising a corrugation S for absorbing thermal distortion provided in at least one side wall of the part of the muffler between adjacent portions at which the muffler is connected to the engine.

Muffler for internal combustion engine

A crank-case pre-compression type 2-cycle engine internal combustion has an intake opening formed in the wall of a crank case and provided with a reed valve therein, and a carburetor disposed at a rearward offset from the intake port. The carburetor is connected to the inlet port through a joint-pipe. The joint-pipe has a mixture passage formed therein, an intermediate contracted portion and a partition plate extending along the axis of the mixture passage. The portion of the mixture passage near the outlet opening thereof is curved to cross the intake port substantially at a right angle to the latter.

Joint-pipe for carburetor

A suction silencer for suppressing generation of noise caused by gas or air sucked by a machine such as a compressor, internal combustion engine or the like. The suction silencer has amounting seat by which it is mounted on the suction side of a machine such as an internal combustion engine. The mounting seat has an opening leading to the suction port of the machine. An inversed conical surface protrudes from the peripheral edge of the opening. A lid member is attached to cover the inversed conical surface such that a small gap is left between the inner surface of the lid member and the large-diameter end of the inversed conical surface. The lid member has an inversed conical member which projects into the space defined by the conical surface so that an annular passage is formed between the inversed conical surface and the peripheral surface of the inversed conical member.

Suction silencer

An exhaust muffler for a two-cycle opposed cylinder engine of simultaneous ignition type having two cylinders opposing to each other in the horizontal direction. The muffler has conical members disposed to oppose to exhaust ports of the cylinders, the exhaust ports being arranged in a side-by-side relation. The conical members form conical annular discharge passages leading from respective exhaust ports. The discharge passages have flattened peripheral outlets of different opening areas. The flows of the exhaust gas from respective cylinders are introduced through the flattened peripheral outlets of the discharge passages into a common diffusion chamber, so that the attenuation of the pressure waves and release of heat of exhaust gas are promoted to reduce the exhaust noise of the engine.

Growing community of inventors

Fuchu, Japan

Takashi Fukuoka