Abstract: The invention relates to a cooling circuit of an internal combustion engine of motor vehicles, comprising a main cooling circuit that encompasses a section located upstream of the radiator, a main radiator, a radiator return path, a coolant pump, a main thermostat, and a bypass or short circuit which is disposed between the main thermostat and the coolant pump. Said cooling circuit further comprises a low-temperature circuit encompassing a low-temperature radiator, a low-temperature radiator return path, a valve unit, and an additional heat exchanger.

Abstract: A cooling mechanism for a rotary valve cylinder engine 1 comprising a rotary valve cylinder 3 rotatably mounted within an outer cylindrical valve element 8, the rotary valve cylinder 3 and the outer cylindrical valve element 8 each being formed with a respective valve port 51, 71, 81, the rotary valve cylinder 3 being rotatable relative to the outer cylindrical valve element 8 to a position in which the ports 51, 71, 81 are aligned, the cooling mechanism comprising fluid passages 11, 28 formed in the rotary valve cylinder 3 and the outer cylindrical valve element 8 through which, in use, cooling oil flows.

Abstract: There is provided a control method of a compression-ignition internal combustion engine capable of easily coping with a wide range of required loads by a single fuel. A compression-ignition internal combustion engine includes a first tank (2) for storing a blended fuel that contains alcohol and liquid hydrocarbon at predetermined percentages and a second tank (4) for mixing the blended fuel supplied from the first tank (2) with water and storing a liquid mixture of the water and the alcohol mixed with each other and the liquid hydrocarbon with the liquid mixture and the liquid hydrocarbon separated from each other, and a supply of the blended fuel stored in the first tank (2) and a supply of the liquid hydrocarbon stored in the second tank (4) are varied according to a required load of the compression-ignition internal combustion engine (1).

Abstract: A system is provided that draws heat from an open-loop engine cycle into a closed-loop working fluid circulatory system that utilizes computer-aided feedback mechanisms. The closed-loop working fluid draws engine heat from multiple sources: exhaust stack gases, the engine block, the engine transmission, and the engine headers and exhaust manifold near the valves. Heat exchangers are arranged in an ascending pattern according to the temperature of the heat at each heat generating location of the open-loop engine cycle. A wankel or similar type engine receives the heated working fluid and rotates a shaft connected to a generator to generate electricity. An electrolysis unit is powered by the generated electricity and separates water into hydrogen and oxygen. A reformation unit receives fuel such as diesel and the generated hydrogen to reform the fuel prior to injection into the engine for combustion.

Abstract: A cylinder head for internal combustion engines, comprising a metallic valve seat ring that is formed by a thermally sprayed homogeneous layer made of a basic Co or Co/Mo alloy. The sum of the Co content and Mo content in the alloy exceeds 50 percent by weight while the Fe content lies below 5 percent by weight. Also disclosed is a method for thermally spraying said valve seat ring by means of an arc wire spraying process with the aid of at least two filler wires and/or composite wires, the essential Co portion in the deposited layer being delivered by the jacket of the filler wire and/or the matrix of the composite wire.

Abstract: An engine comprises: a V-belt type continuously variable transmission on one side of an engine case, said CVT being provided with and housing in a transmission case a drive pulley attached to one end of a crankshaft, a driven pulley attached to one end of a transmission shaft parallel to said crankshaft, a V-belt routed around the pulleys, said engine case supporting said crankshaft and transmission shaft in a rotatable manner, and a generator attached to the opposite end of said crankshaft in said engine case; in which a filter chamber is disposed in the opposite side surface of said transmission case of said engine case in a depressed manner so as to overlap with at least a part of said generator in the crankshaft direction, and an oil filter for filtering lubricating oil is disposed in said filter chamber.

Abstract: An intake system for a motorcycle having an engine. The intake system includes an air box having a first opening for receiving intake air and a second opening for supplying the intake air from the air box to a throttle assembly of the engine. A filter element is disposed within the air box for separating debris from the intake air. A valve is disposed within the air box between the filter element and the second opening. The valve is movable to provide a variable restriction to intake air flow through the air box.

Abstract: A four-stroke reciprocating piston internal combustion engine with an intake valve an exhaust valve and a valve drive assembly (18) driven by the crankshaft (4) for actuating the intake valve (8) and the exhaust valve (10) A mixture-preparation device (15) supplies an air/fuel-lubricant mixture to the crankcase, which together with the piston functions as a pump for the mixture charge. A valve drive assembly housing (19, 20, 21, 22) comprising one or more sections (19, 20, 21, 22) and the intake channel (16) is supplied with a connecting duct (17) communicating with the crankcase volume (12) either by being connected to the crankcase or the cylinder, or by being connected to the valve drive assembly housing (19, 20, 21, 22), which communicates with the crankcase volume (12), and the communication from the intake channel (16) to the crankcase volume is arranged through at least one valve.

Abstract: A cooling system for a marine propulsion device provides a bypass loop around a cooling pump that allows the flow of cooling water through certain components to be reduced or increased as a function of the temperature of those components while causing a full flow of cooling water to flow through other selected heat emitting devices. Using this configuration of components and bypass conduits, the operating condition of the cooling water pump can be continually monitored, including the condition of its flexible vanes. By observing the effective cooling capacity of the system under conditions with the bypass valve open and closed, the effectiveness of the cooling water pump can be assessed and a suggestion of maintenance can be provided.

Abstract: In a bottom plate for closing a crankcase of an internal combustion engine wherein the bottom plate includes openings and channels for collecting and conducting fluids, the bottom plate consists of a number of individual plates which are joined together after the channels and openings have been cut into the individual plates by laser beam cutting or water beam cutting.

Abstract: A duct member is disposed around outer peripheries of an engine and an engine-driven generator to define a continuous cooling-air passage between the duct member and the outer peripheries. A cooling fan is disposed in the cooling-air passage to generate a flow of cool air from one end of the cooling-air passage to the other end during operation of the engine. An exhaust muffler of the engine is disposed in the vicinity of the other end of the cooling-air passage. An air guide plate is connected to the duct member and is suspended from an upper portion of the duct member to cover an upper portion of one side face of the exhaust muffler which is opposite the cooling-air passage so that the air guide plate guides the cooling air flowing out of the cooling-air passage downward along the one side face of the exhaust muffler.

Abstract: A vehicle is capable of simplifying attaching a connection member and an atmospheric discharge member to a reservoir tank of a vehicle body. The vehicle is arranged such that it includes a connection member for connecting a heat exchanger for cooling an engine and a reservoir tank for storing liquid therein. An atmospheric discharge member attached to the reservoir tank and having an atmospheric discharge opening is located in the vicinity of the connection member.

Abstract: An internal combustion engine is disclosed. The internal combustion engine includes a crankcase and a mounting plate or base plate connected to the bottom portion of the crankcase. The base plate includes a plurality of engine mountings integrally formed with the base plate for securing the engine to a chassis. The base plate and the crankcase cooperate together to define at least one cooling chamber within the crankcase and cooling fluid passageways within the at least one cooling chamber.

Abstract: An engine lubrication oil flow control system and control method for an engine in a hybrid electric vehicle powertrain is disclosed. An engine lubrication oil pump is powered by a lubrication oil pump motor. Provision is made to start the lubrication pump motor at the initiation of engine cranking upon a transition from an engine-off driving mode to an engine-on driving mode. An engine oil pressure signal is used to indicate engine filter maintenance is needed. The oil pump motor may be powered by a vehicle powertrain traction battery.

Abstract: A reed valve assembly is provided with a body, at least one flexible member, and at least one rigid member. Preferably, the at least one flexible member has a periphery so as to substantially cover opening(s) in the body when positioned adjacent to the body, and the at least one rigid member has a periphery so as to limit deformation of the at least one flexible member.

Abstract: An air separator for low flow rate coolant systems which removes air from the liquid coolant thereof. The air separator is a closed canister having a bottom wall, a top wall at a gravitationally high location with respect to the bottom wall, and a sidewall sealingly therebetween. A coolant inlet is at the sidewall, a pump outlet is at the bottom wall and a coolant reservoir outlet is at the top wall. The coolant reservoir outlet is connected to a coolant reservoir gravitationally elevated with respect to the canister. A much larger cross-sectional area per unit length of the canister relative to the piping results in a coolant dwell time in the canister that encourages coolant air bubbles to migrate toward the coolant reservoir.

Abstract: A four-cycle engine of the present invention comprises a gas exhaust outlet that is formed on an upper region of a crankcase to exhaust a gas from the interior of the crankcase to outside; and a rotatable shaft disposed in close proximity to the gas exhaust outlet in the interior of the crankcase. The gas exhaust outlet is configured to open toward a region in the interior of the crankcase, the region extending from a line segment connecting the gas exhaust outlet to a rotational center axis of the shaft, in a rotational direction of the shaft at a cross point where the line segment crosses an outer peripheral surface of the shaft.

Abstract: An air intake device of an internal combustion engine which is capable of enhancing the air intake efficiency and reducing the size is provided. The internal combustion engine includes a cylinder head, an intake manifold provided at a longitudinal side surface of the cylinder head, and a head cover provided on the cylinder head. The air intake device of the internal combustion engine includes an air cleaner including an upper casing and a lower casing detachably coupled to each other and incorporating a filter element, an atmospheric air introduction pipe for introducing air to the air cleaner, and an intake pipe extending from the air cleaner to the intake manifold.

Abstract: A cylinder sleeve for being inserted in a cylinder bore defined in a block body of a cylinder block for an internal combustion engine. The cylinder bore includes a first annular recess and a second annular recess, and projecting walls. The cylinder sleeve comprises a hollow cylindrical body that is inserted into the cylinder block with at least part of an outer circumferential wall thereof adjacent to an inner circumferential wall of the projecting walls of the cylinder block, a larger-diameter portion projecting diametrally outwardly from an upper end of the outer circumferential wall of the hollow cylindrical body, a step disposed on an outer circumferential wall of said larger-diameter portion, by which the larger-diameter portions of adjacent cylinder sleeves are stacked, and a reduced-diameter portion provided by reducing a diameter of an inner circumferential wall of said hollow cylindrical body.

Abstract: An internal combustion engine intake device is provided for an internal combustion engine such that intake device that can reduce the vibration of the throttle chamber of an internal combustion engine. The intake device has an intake air collector, a vacuum tank and a first air induction pipe. The vacuum tank is arranged closely adjacent to the intake air collector. The first air induction pipe extends upstream from the intake air collector in such a manner as to be closely adjacent to the vacuum tank. Preferably, the first air induction pipe is integral with the intake air collector and the vacuum tank.