Patent application number | Description | Published |
20090038879 | MUFFLER UNIT FOR GENERAL-PURPOSE ENGINE - A muffler unit for a general-purpose engine includes a muffler ( | 02-12-2009 |
20090288643 | LINK TYPE VARIABLE STROKE ENGINE - In a link type variable stroke engine in which a piston, a crankshaft and an eccentric shaft are linked by a linking mechanism, an oil supply hole for supplying lubricating oil to a position between a connection tubular part of a sub connecting rod and a crank pin is provided in an upper portion of the connection tubular part at a position which is deviated from a direction of application of maximum load applied from the crank pin to an inner surface of the connection tubular part by maximum in-tube pressure, and which is immediately behind a point of application of the maximum load along a direction in which the crank pin rotates relative to the sub connecting rod. Accordingly, it is possible to prevent leak of oil from the oil supply hole and thereby reliably lubricating the position between the connection tubular part of the sub connecting rod and the crank pin by a splash lubrication system. | 11-26-2009 |
20090301425 | POWER-STORAGE-TYPE ENGINE STARTING SYSTEM - A power-storage-type engine starting system includes a coil spring for storing power to be used in starting the engine. An end of a crankshaft is configured to pass through a cylindrical shaft part and is passed through a one-way clutch attached to inside of an assist boss so that an assist boss and the one-way clutch can be provided at radially outside of the shaft end, whereby the crankshaft is made shorter. | 12-10-2009 |
20100064995 | Engine valve operating system - In an engine valve operating system, a timing transmission chamber ( | 03-18-2010 |
20110192360 | WATER-COOLED FOUR-CYCLE ENGINE - In a water-cooled four-cycle engine, an engine core including a cylinder block, a cylinder head and a first crankcase half body is formed as a unitary part cast integrally; a water jacket including a cylinder jacket surrounding a cylinder bore and a head jacket surrounding a combustion chamber is formed in the engine core; and a timing-belt chamber being adjacent to the cylinder jacket is provided in a side portion of the engine core. A first opening portion for forming a first semi-peripheral portion of the cylinder jacket on a side opposite from the timing-belt chamber by casting out is provided in a side surface of the cylinder block. A second opening portion for forming a second semi-peripheral portion of the cylinder jacket and the head jacket by casting out is provided in an upper surface of the cylinder head. | 08-11-2011 |
20110192361 | WATER-COOLED FOUR-CYCLE ENGINE - In a water-cooled four-cycle engine, an engine core including a cylinder block, a cylinder head and a first crankcase half body is formed as a unitary part cast integrally; a water jacket including a cylinder jacket and a head jacket is formed in the engine core; and a timing-belt chamber being adjacent to the cylinder jacket is provided in a side portion of the engine core. A first opening portion for forming a first semi-peripheral portion of the cylinder jacket on a side opposite from the timing-belt chamber by casting out is provided in a side surface of the cylinder block. Second and third opening portions for forming a second semi-peripheral portion of the cylinder jacket and the head jacket as well as the timing-belt chamber, respectively, by casting out are provided in an upper surface of the cylinder head. | 08-11-2011 |
20110192362 | WATER-COOLED FOUR-CYCLE ENGINE - In a water-cooled four-cycle engine, an engine core including a cylinder block, a cylinder head and a first crankcase half body is formed as a unitary part cast integrally, and a water jacket including a cylinder jacket and a head jacket is formed in the engine core. In a first side surface of the engine core which is parallel with an axis of a crankshaft, an intake port and a first semi-peripheral portion of the water jacket are opened and a first lid plate for closing an opening portion of the first semi-peripheral portion is connected. In a second side surface of the engine core on a side opposite from the first side surface, an exhaust port and a second semi-peripheral portion of the water jacket are opened and a second lid plate for closing an opening portion of the second opposite portion is connected. | 08-11-2011 |
20120067305 | COVER STRUCTURE OF GENERAL-PURPOSE LIQUID-COOLED ENGINE - A general-purpose liquid-cooled engine delivers a coolant cooling an engine body to a radiator and delivers a cooling air to the radiator by use of a cooling fan to cool the coolant. A cover structure of the general-purpose liquid-cooled engine covers the engine body and the radiator. An engine cover is configured so as to allow the cooling air to be delivered to the radiator. A muffler cover covers a muffler disposed adjacent to an external surface of the engine cover. An exterior cover covers an entire engine including the engine cover and the muffler cover. | 03-22-2012 |
20120067307 | COOLING-MEANS-EQUIPPED, LIQUID-COOLED ENGINE - A liquid-cooled engine provided with cooling means for cooling an area surrounding a combustion chamber using a cooling liquid cooled by a radiator and caused to flow through a cooling passage. The cooling passage is embedded inside a cylinder block and a cylinder head. The cooling passage is formed in a continuous fashion such that the cooling liquid is introduced from the radiator to cool an area surrounding the combustion chamber, and thereafter returns to the radiator by looping around an area surrounding an exhaust valve for opening and closing an exhaust port of the combustion chamber. | 03-22-2012 |
20120067314 | VALVE-MECHANISM-EQUIPPED ENGINE - A valve-mechanism-equipped engine having increased combustion efficiency is disclosed. The engine includes intake and exhaust rocker arms having a swing center line inclined relative to a rotation center line of a cam, and an intake valve and an exhaust valve inclined relative to a cylinder. A cam surface is inclined relative to the rotation center line of the cam. Slippers of the intake and exhaust rocker arms are in sliding contact with the cam surface. | 03-22-2012 |