Abstract: The invention relates to a balancing shaft for a single-cylinder or multi-cylinder engine having at least one unbalanced weight portion (21, 22; 23, 24) and at least one bearing (16, 17), the at least one unbalanced weight portion (21, 22; 23, 24) being associated with the bearing (16, 17) and the bearing (16, 17) having a radial running face (18) which extends only partially over a periphery of the bearing (16, 17) and a centrifugal force which results during rotation of the balancing shaft (11) is situated within a region of the bearing (16, 17) that is formed by the running face (18) which extends partially over the periphery of the bearing (16, 17), wherein provision is made for at least one supporting surface (51) to extend partially over the periphery of the bearing (16, 17) and to be provided separate from the running surface (18).

Abstract: When a cooling airflow used for cooling an engine etc. is discharged to a side of a machine as a discharge airflow, the airflow can be prevented from blowing to trees located at the side of the machine and to walkers passing the side of the machine. A rotary working machine has, inside a bonnet (10), an engine (8) and a discharge type cooling fan (45). An opening (10b) for discharging cooling airflow is provided in a side of the bonnet (10), and a movable louver (50) having blades (52, 52, . . . ) is provided in a duct (48) placed between the opening (10b) and the cooling fan (45).

Abstract: A four-cycle engine with an enclosed oil reservoir for mounting on a power tool is provided. An oil pump driven by a camshaft, which mates by a cam gear with crank gear that is driven by a crank shaft, inhales the oil from the oil reservoir to lubricate the engine parts. A circular arc wall surrounds around web of the crankshaft with a slight distance from the web. A scroll-shaped wall has gradually increased distance from the circular arc wall to the direction of rotation of the web and has partial overlap with the circular arc wall. In case of stock of engine oriented power take off side up or down, oil is prevented to flow from oil reservoir to combustion chamber by a weir which is provided between the circular wall and the scrolled wall. The check valve splashes breathing missed oil from the crankshaft to the breather room and causes the oil to supply lubricant to lubricate the engine parts.

Abstract: A device for removing a fluidic contaminant from lubricating oil in an internal combustion engine includes a fluid absorbing element comprising a mounting element and a fluid absorption media assembled into a sump of a crankcase of the internal combustion engine. The fluid absorbing element is immersed within the oil contained in the sump when the engine is not operating. The fluid absorption media is configured to absorb a fluidic contaminant in the engine oil when the engine is not operating and to desorb the absorbed fluidic contaminant.

Abstract: The invention provides to a cooling system and a method of cooling an engine-driven generator. The engine-driven generator includes an engine, a current generator, and a housing. The engine includes an engine air intake, and the current generator includes a generator air intake. The housing includes a first outlet, a second outlet, a first air passageway, and a second air passageway. The first air passageway is in communication with the second air passageway. The second air passageway partitions air into a first stream supplied to the engine air intake and a second stream supplied to the generator air intake. The first stream exits through the first outlet, and the second stream exits through the second outlet.

Abstract: Systems and methods of operation for internal combustion engines which employ molecular sieve technology to provide enhanced oxygen content in the air-fuel mixture during operation.

Abstract: In a cylinder head lubricating structure for an engine, in which a breather passage which guides, toward a cylinder head, gas including oil mist generated in a crank chamber by oil splashing means housed in the crank chamber so as to splash-oil in accordance with rotation of a crankshaft is formed in a crankcase, a cylinder block and the cylinder head to supply, toward the cylinder head, lubricating oil through the breather passage, a breather chamber with which an end portion, on the crank chamber side, of the breather passage communicates is formed in the crankcase, and a one-way valve preventing backflow of the oil toward the crank chamber is attached to the crankcase to be located between the crank chamber and the breather chamber. Accordingly, it is possible to supply a sufficient amount of oil to the cylinder head side even when the head difference between the crank chamber and the cylinder head is large.

Abstract: The invention relates to an oil pan/axle support. There is a need for an oil pan/axle support which is a structural member and which places the front axle support in front of the engine. Such an oil pan/axle support includes a rigid structural housing capable of forming a portion of a frame of a vehicle. The housing has an aft portion and a forward portion. The aft portion forms an engine oil reservoir surrounded by a rim. The rim has an upwardly facing sealing surface for engagement with a block of an engine. The forward portion extends forward from the aft portion and forms a pair of fore-and-aft spaced apart pivot bores for receiving a front axle pivot pin so that the front axle is spaced forward with respect to a front portion of the engine.

Abstract: With regard to a surface hardening method wherein a surface of an engine member is coated with an alloy layer having high abrasive resistance so as to improve the life of the member and a production method of a piston or the like wherein abrasive resistance of the member is improved by the hardening method, a surface of a metal base material is coated uniformly with a mixture including metal powder, a binder and a solvent so as to form a coat, and the coat is dried and applied thereon with a laser or electron beam so as to be sintered and dispersed for forming an alloy layer on a surface of the metal base material and for bonding the alloy layer to the metal base material.

Abstract: A blow-by gas introducing passage having a blow-by gas inlet port, an air-cleaner-side breather passage that extends upwardly as branched from the blow-by gas introducing passage so as to communicate with an intake system, and a case-side breather passage that extends downwardly as branched from the blow-by gas introducing passage so as to communicate with an oil chamber are provided to an inner surface of a side cover that is detachably mounted to a timing-gear chamber communicating with a crank chamber. The blow-by gas introducing passage, the air-cleaner-side breather passage, and the case-side breather passage are formed integral with the side cover.

Abstract: An engine air management system is provided for an internal combustion engine generating blowby gas in a crankcase containing engine oil and oil aerosol. The system includes combinations of two or more of an air-oil separator, an air filter, and an acoustic silencer.

Abstract: An oil-collecting can (500) for a filter cartridge (300) comprises a plurality of capillary ribs (530) that are sized and shaped to contact filter media in the outlet chamber. The oil-collecting can (500) can be used in conjunction with a filter cartridge (300), which is installed in a filter assembly to encourage the downward flow of oil droplets. Such a filter assembly could be used, for example, in a crankcase ventilation system, to remove particulates and other contaminants from piston-bypass fumes.

Abstract: A dynamic engine oil pickup system is disclosed. The dynamic engine oil pickup system includes a scavenge pump and a pickup tube assembly in fluid communication with the scavenge pump. The pickup tube assembly includes at least two oil pickup portions operable to pickup engine oil from at least two different oil pickup locations and a flow control operable to control a flow of engine oil between the at least two different oil pickup locations and the scavenge pump. The flow control includes a suction valve, and movement of the suction valve is controlled by selectively applying a high pressure oil to a head of the suction valve.

Abstract: An engine 20 includes a two-plane type crankshaft 30 and a balancer shaft 50 for reducing a primary couple of the balancer shaft 50. The crankshaft 30 includes a crankshaft body 30a and a first gear 38. The first gear 38 is disposed at one axial end side of a first crank web pair 31a disposed at the outermost one axial end side of the crankshaft 30. In the engine 20 including the two-plane type crankshaft, the weight of the engine can be reduced while securing high reliability.

Abstract: An engine system and a method of operation are described. The engine may be operating in two-stroke and four-stroke modes while still maintaining a target exhaust air-fuel ratio.

Abstract: An internal combustion engine crankshaft assembly includes a crankshaft having an output device, such as a flywheel or crankshaft damper, fastened to the crankshaft. An electronic engine control device is positioned between the crankshaft and the output device. The electronic engine control device includes a generally planar base which contacts both the output device and the crankshaft. The planar base is coated with a pressure-responsive friction-promoting material which causes the output device to be torsionally locked with respect to the crankshaft.

Abstract: The present invention relates to the reduction of harmful exhaust emissions on ships using diesel engines equipped with a wet emissions reduction system. In particular, the invention relates to a large diesel internal combustion engines installed on a ship and fitted with a wet emissions reductions system that is supplied water by an onboard advanced wastewater treatment system (AWTS).