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| Number | Title | Issue Date |
| 7299773 | Cylinder for a two stroke engine A cylinder for a two-stroke engine has a cylinder wall defining a cylinder interior. A cylinder head closes of a combustion chamber in the cylinder interior. An exhaust is connected to the cylinder interior. At least one transfer passage having a transfer port opens... | 11/27/2007 |
| 7146806 | Internal combustion engine cylinder and muffler assembly with catalytic converter A two cycle internal combustion engine cylinder having a piston chamber. The cylinder includes transfer ports; and an exhaust port divided into at least two sections. A first one of the sections has an aperture at the piston chamber with a top surface located closer... | 12/12/2006 |
| 7134270 | External combustion engine An external combustion engine comprising a body (8), at least one working chamber (18), combustion chamber (13), crankcase (21) and compression chamber (6), at least one working piston (20), compression piston (7) and... | 11/14/2006 |
| 7131406 | Two-cycle engine having scavenging A two-cycle engine in a portable, manually-guided implement, such as a power chain saw, a cut-off machine, a brush cutter, or the like, is provided. The cylinder has a combustion chamber that is delimited by a reciprocating piston that via a connecting rod drives a ... | 11/07/2006 |
| 7128031 | Lead air control apparatus of stratified scavenging two-cycle engine In an insulator (21) inserted between a carburetor (30) and a cylinder (3) for a purpose of insulating heat, there are formed an intake passage (22) connected to the carburetor (30), and a pair of first air passages (23) con... | 10/31/2006 |
| 7100550 | Two-stroke engine transfer ports A two-stroke internal combustion engine including a cylinder; and a piston movably mounted in the cylinder. The cylinder includes an exhaust port and transfer ports. The transfer ports include a first pair of the transfer ports disposed closer to the exhaust port th... | 09/05/2006 |
| 7082910 | Two-stroke internal combustion engine Crankcase scavenged two-stroke internal combustion engine (1), in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3′). The air passage is arranged from an air inlet ( | 08/01/2006 |
| 7017535 | Carburetor for two-stroke engine The present invention provides a carburetor that can be adapted to a variety of engines with different positional relationships between the location for feeding the air/fuel mixture and the location for feeding scavenging air. The carburetor a carburetor main body (... | 03/28/2006 |
| 6976457 | Two-stroke engine having a membrane valve integrated into the transfer channel A mixture lubricated two-stroke engine includes a cylinder (4) having a cylinder head (3) and a cylinder bore (5) open to the crankcase (6). A piston (7) is displaceably arranged in the cylinder bore (5). The piston (7 | 12/20/2005 |
| 6932032 | Two-stroke engine A two-stroke engine (1) has a combustion chamber (3) disposed in a cylinder (2). The combustion chamber (3) is delimited by a reciprocating piston (5). The piston (5) drives a crankshaft (7) via a connecting rod (6... | 08/23/2005 |
| 6854430 | Engine body and cylinder for internal combustion engine The subject invention refers to an engine body for a crankcase scavenged two-stroke engine, comprising a cylinder (1) with a cylinder bore (2), and on opposite sides of the cylinder located, closed scavenging ducts (12a, 12b... | 02/15/2005 |
| 6755160 | Internal combustion engine for a handheld portable work apparatus The invention relates to an internal combustion engine for a portable handheld work apparatus including a motor-driven chain saw, cutoff machine or the like and relates especially to a two-stroke engine having an inlet opening (3) provided in the cylinder ( | 06/29/2004 |
| 6736090 | Valve device of engine An engine valve device, wherein an opening part (7) smaller in area than the end surface of a piston (5) is provided in the end surface of a cylinder (3) to form a valve seat (8), and a valve disc (9) in contact with the valve seat... | 05/18/2004 |
| 6668770 | Two-stroke interal combustion engine Crankcase scavenged two-stroke internal combustion engine, in which at least one piston ported air passage, with length Lai, is arranged between an air inlet (2) and each scavenging port (31, 31') of a number of transfer ducts (3, 3'), with len... | 12/30/2003 |
| 6662766 | Two-stroke internal combustion engine An air-preintroduction type two-stroke internal combustion engine which is capable of minimizing the quantity of blow-by, thus making it possible to improve the fuel consumption and to reduce the content of poisonous components in the exhaust gas, and is ... | 12/16/2003 |
| 6647933 | Electronic control unit for two-cycle internal combustion engine An electronic control unit for a two-cycle internal combustion engine including an exhaust control valve which adjusts exhaust timing, a valve controller which controls the exhaust control valve, and a reversal controller which controls reversing a rotati... | 11/18/2003 |
| 6595168 | Two-stroke internal combustion engine An air-preintroduction type, two-stroke internal combustion engine which is capable of minimizing the quantity of blow-by, thus making it possible to improve the fuel consumption and to reduce the content of poisonous components in the exhaust gases, and ... | 07/22/2003 |
| 6539900 | Two-stroke internal combustion engine with crankcase scavenging The invention relates to a two-stroke internal combustion engine with crankcase scavenging, with an exhaust passage controlled by the piston and at least two first transfer passages and at least one second transfer passage, each with a corresponding trans... | 04/01/2003 |
| 6497204 | Stratified scavenging two-stroke cycle engine The engine can improve a leading air suction efficiency, has a simple structure and a low cost. Accordingly, in a stratified scavenging two-stroke cycle engine provided with an exhaust port (22) and a scavenging port (21) which are connected to a cylinder... | 12/24/2002 |
| 6263841 | Two stroke engine having reduced emissions A simple, piston ported, two stroke engine having low weight, small size, low fuel consumption, enhanced power output and reduced exhaust emissions. A rotary exhaust valve adjacent to the cylinder exhaust ports closes the exhaust at completion of cylinder... | 07/24/2001 |
| 6216649 | Low emission two-cycle internal combustion engine for powering a portable tool A low emission two-cycle internal combustion engine for powering a portable tool is provided. The two-cycle engine comprising a cylinder block containing two parallel cylinders adjacent to each other receiving two reciprocating pistons. One cylinder in co... | 04/17/2001 |
| 6170444 | Air and exhaust gas management system for a two-cycle internal combustion engine The air and exhaust gas management (scavenging) system for a two-cycle internal combustion engine allows the engine to perform comparably to similar four-cycle engines, while remaining lighter, simpler and more cost-effective than its four-cycle counterpa... | 01/09/2001 |
| 6161509 | Cylinder The invention refers to a cylinder (1) for a two-stroke internal combustion engine intended for a handheld working tool, preferably a chain saw, and the exhaust duct (2) and transfer ducts (3, 4) of the cylinder are symmetrically arranged around a mutual ... | 12/19/2000 |
| 6129059 | 2-stroke cycle internal combustion engine To provide a 2-stroke cycle internal combustion engine for a vehicle in which less blowoff of a gas mixture occurs in a combustion chamber, fuel consumption is low and high exhaust gas purifying performance is attained. The cylinder of the internal combus... | 10/10/2000 |
| 6016776 | Cylinder Cylinder (1) for a two-stroke combustion engine intended for a handheld working tool, preferrably a chain saw. The exhaust port's (3) mouth (17) inside the cylinder as well as the cylinder's transfer ports (5, 6, 7, 8) are arranged symmetrically around a ... | 01/25/2000 |
| 5908013 | Two-cycle engine A two-cycle engine for boosting intake pressure for higher performance per displacement. The two-cycle engine includes a crankcase having a blower housing and a crankshaft therein extending through the blower housing. The blower housing has an intake open... | 06/01/1999 |
| 5899177 | Four-cycle marine engine A cylinder block for an internal combustion engine includes a mounting surface having therein a crankcase cavity and a pair of cylinders respectively extending from the cavity in acute angular relation to each other and each including a cylinder wall. The... | 05/04/1999 |
| 5881687 | Two-stroke internal combustion engine In a two-stroke internal combustion engine, output power is increased and total hydrocarbon (THC) exhaust is decreased as a result of small structural changes. An exhaust port and scavenging ports are configured and disposed such that they are open in a r... | 03/16/1999 |
| 5870981 | Two-stroke engine having several transfer channels A two-stroke engine for driving a crankshaft includes a cylinder defining a longitudinal elevation axis and having a top wall and a cylindrical side wall terminating in the top wall. A piston is mounted in the cylinder so as to be movable along the side w... | 02/16/1999 |
| 5799635 | Two cycle engine having a decompression slot A two-cycle engine having an enclosed crankcase assembly and a cylinder assembly. A cylinder wall is sized to sealingly cooperate with the piston as it reciprocates relative thereto. The cylinder assembly is provided with an exhaust port in a first plane ... | 09/01/1998 |
| 5645018 | Two cycle internal combustion engine A two-cycle internal combustion engine is provided which is capable of preventing the blow-by phenomenon, thereby improving both fuel economy and exhaust purifying performance, and superior in the response of fuel injection volume. In a two-cycle internal... | 07/08/1997 |
| 5471960 | Cylinder for two-cycle internal combustion engine A cylinder for a two-cycle internal combustion engine is disclosed which enables reduction of HC in exhaust gas to be effectively attained without any complicated modification. A pair of scavenging ports 20, 20 are oppositely formed which employ loop scav... | 12/05/1995 |
| 5363819 | Pneumatic-injection two-stroke engine with first order balancing of the reciprocating masses A two-stroke engine comprising a crankshaft rotating around a first axis of rotation and having at least one balancing mass, a controller for controlling feeding of at least one combustion chamber of the engine. A second shaft is rotatable around a second... | 11/15/1994 |
| 5345897 | Gas-exchanging process for two-stroke, internal combustion engines The invention relates to a gas-exchanging process for two-stroke internal combustion engines, and a two-stroke internal combustion engine for executing the process, in which two scavenging paths of the gas are provided, namely the known reverse scavenging... | 09/13/1994 |
| 5307792 | Two cycle engine provided with a scavenging pump A scavenge system for a two cycle internal combustion engine that includes separate scavenge manifolds and riser scavenge passages extending therefrom to the individual scavenge ports so as to permit the establishment of a desired flow pattern within the ... | 05/03/1994 |
| 5213069 | Two-stroke super charged engine and process for operating A two-stroke internal combustion engine is provided with a cylinder and a piston reciprocatingly mounted in the cylinder; the cylinder has two inlet ducts each having a inlet port opening into the cylinder for delivering a inlet strain to the cylinder and... | 05/25/1993 |
| 5191858 | Dual cycle engine The invention relates to new and useful improvements in dual-cycle engine design and construction. The invention enhances the mechanical ability of such engines to automatically match the engine cycle with the load conditions while the system is in operat... | 03/09/1993 |
| 5159903 | Air intake system for two cycle multi cylinder engine Two embodiments of multiple cylinder two cycle internal combustion engines embodying scavenge manifolds that extend around the cylinder bores and which communicate with the cylinder bores through a plurality of circumferentially spaced scavenge ports. The... | 11/03/1992 |
| 5134976 | Internal combustion engine An internal combustion engine comprising an engine block defining a cylinder bore and including an exhaust passage communicating with the cylinder bore, a cylinder liner which is housed in the cylinder bore and which includes an exhaust port communicating... | 08/04/1992 |
| 5048473 | Method and apparatus for equipping a two-stroke engine which is self-supercharged by post-charging and in which an admission duct provides pre-exhaust into a storage chamber The invention relates to a method and apparatus for arranging a post-charging two-stroke engine. The apparatus includes a post-charging system (16) including an air admission duct (22) to the cylinder (14). The duct communicates intermittently either with... | 09/17/1991 |
