Abstract: A method of constructing a bedplate assembly for retention of a crankshaft in an internal combustion engine having an engine block includes forming a bedplate insert in a first pattern tool. The bedplate insert is defined by a height, a width, and a thickness. The bedplate insert also includes a shape having a variation in the width along the height. The method also includes arranging the formed bedplate insert in a second pattern tool. The method additionally includes forming in the second pattern tool a bedplate frame around the formed bedplate insert to generate the bedplate assembly. During forming of the bedplate frame, the variation in the width of the bedplate insert generates an internal rib in the bedplate frame that is configured to fix and retain the bedplate insert inside the bedplate frame and decrease deflection of the bedplate frame under crankshaft loads during operation of the engine.

Abstract: A vibration insulator which can compensate for axial eccentricity occurring in a fuel injection valve and suppress vibrations of the valve during operation of a combustion engine and a support structure for the valve. The vibration insulator is interposed between a step height portion of the valve and a shoulder portion. The step height portion is increased in diameter in a tapered fashion and inserted into an insertion hole of a cylinder head. The shoulder portion is annularly extended in an inlet portion of the insertion hole opposed to the step height portion. The vibration insulator includes an annular tolerance ring on an inner circumferential inclined face thereof with recessed tapered faces opposed to the tapered face of the step height portion and which abuts the tapered face. The taper angles of the tolerance ring and of the step height portion are set so as to be different.

Abstract: An engine for a portable working machine includes: a crankshaft to which the working machine is coupled; an air-cooling fan coupled to one end side of the crankshaft; a fan casing enclosing the air-cooling fan; and a bottom cover located in a bottom surface side of the engine and connected to the fan casing. Air suction ports and guide parts are provided in one side of the bottom cover, the air suction ports sucking in air supplied from the air-cooling fan, and the guide parts extending from the air suction ports to the impeller blades of the air-cooling fan.

Abstract: The present invention relates to a method for producing a pipe (1) which is provided in its wall (2) and between its ends with at least one channel (4) which passes through the wall (2), in which method a plastic pipe preform (16) is blow-moulded, wherein a protrusion (17) is provided for the channel (4), this protrusion lining the pipe preform (16) and having inside dimensions which are larger than the outside dimensions of the channel (4), in which method the pipe preform (16) in its as yet unsolidified state is squashed in the region of the protrusion (17) in such a way that a rough channel (21) communicating with the interior (3) of the pipe (1) is formed for the channel (4), this rough channel being closed at its end remote from the interior (3) of the pipe and having, apart from the desired channel length (7), the outside dimension of the channel (4), and in which method the squashed pipe preform (16) in its solidified state is cut in the region of the rough channel (21) in such a way that the channel (

Abstract: A connecting rod assembly is disclosed for use with an engine. The connecting rod assembly may include a first connecting rod having a first end configured to pivotally connect to a first piston and a second can with a circular opening configured to receive a throw of a crankshaft. The connecting rod assembly may also include a second connecting rod having a first end configured to pivotally connect to a second piston and a second end with a circular opening configured to receive the throw of the crankshaft. The second connecting rod may have a running surface defining at least two outer lands and at least one inner land disposed between the at least two outer lands that alternately support a load of the second piston. Both the at least one inner and the at least two outer lands may simultaneously support the load of the second piston at a point of highest load on the second piston.

Abstract: A cooling system for a marine engine is provided with various cooling channels which allow the advantageous removal of heat at different rates from different portions of the engine. A split flow of water is conducted through the cylinder head, in opposite directions, to individually cool the exhaust port and intake ports at different rates. This increases the velocity of coolant flow in the downward direction through the cylinder head to avoid the accumulation of air bubbles and the formation of air pockets that could otherwise cause hot spots within the cylinder head. A parallel coolant path is provided so that a certain quantity of water can bypass the engine block and avoid overcooling the cylinder walls.

Abstract: An engine comprises one or more cylinders, each cylinder comprising a piston, a connecting rod, a crank shaft, and a crankpin, wherein the crankpin further comprises a main crankpin and a crankpin extension, wherein the connecting rod is affixed at one end to the piston and at another end to a first end of the crankpin extension, wherein a second end of the crankpin extension is affixed to a first end of the main crankpin, and wherein a second end of the main crankpin is affixed to the crankshaft.

Abstract: An engine with pistons (7, 8, 67, 68, 69) that follow a circular motion (6) and respective cylinders (11, 15, 77, 78, 79) that follow a counter-circular motion (13, 17) relative to the pistons, such that each piston follows a linear path (S) relative to the respective cylinder, and at least a top surface (8T) of each piston remains within the cylinder throughout engine operation, resulting in a stroke length (S) four times a radius (R) of the circular motion. The pistons may be interconnected by connecting rods (9) without wrist pins, forming a multi-piston assembly (7-8-9, 115) as a single dynamic unit. Intake (110) and exhaust gas passages may go through the crankshaft (20, 20A) and the connecting rod assembly (115) to ports (130, 132) in the tops of the pistons via rotary valves (126, 128) in the connecting rod assembly.

Abstract: Coolant circuit, in particular a coolant circuit having a plurality of sub-circuits 1, 2, 3 of an internal combustion engine 11 includes a primary cooling circuit 1 and a heating circuit 2 as well as a coolant delivery pump 5 disposed on a rotary actuator 4, with the rotary actuator 4 having a rotary-slide housing 20 with several ports 8a, 8b, 9a, 9b, 10a through which coolant can flow, and a first and at least one second rotary slide 6 and 7 which are rotatably supported in the rotary-slide housing 20 and have each at least one rotary-slide pass-through opening 8, 9, 10 forming a flow path, wherein the ports 8a, 8b, 9a, 9b, 10a can be brought into at least partial coincidence with the rotary-slide pass-through openings 8, 9, 10 by a rotary motion of the respective rotary slide 6 and/or 7), wherein a first branch 1a of the primary cooling circuit 1 leads from the internal combustion engine 11 via a main radiator 12 to a main radiator port 8b of the first rotary slide and can be controlled by the first rotary

Abstract: A portable, on-demand hydrogen generation system producing hydrogen and injecting the hydrogen into the air intake of internal combustion engines. Hydrogen and oxygen is produced with an electrolyzer from nonelectrolyte water in a supply tank. The hydrogen and oxygen is passed back thru the supply tank for distribution and water preservation. The gases are kept separate by a divider in the tank. The device is optionally powered by the vehicle battery, a stand alone battery, waste heat of the internal combustion engine or solar energy. The system utilizes a vacuum switch or other engine sensor that permits power to the device and therefore hydrogen production only when the engine is in operation.

Abstract: Disclosed is a device for cooling an internal combustion engine in which circulation of cooling water is halted until the cooling water reaches a predetermined temperature, wherein decline in the durability of a radiator, which is caused by thermal strain that occurs when circulation of the cooling water is restarted and the cooling water is introduced into the radiator, is suppressed. An internal combustion engine (10) comprises an electric pump (23), a water temperature sensor (92), a radiator (21), and a thermostat (22). The water temperature sensor (92) detects a cooling water temperature (THW). The radiator (21) is capable of circulating the cooling water between the radiator (21) and an engine cooling system (13). If the cooling water temperature (THW) is equal to or greater than a valve opening temperature (TZ), the thermostat (22) opens and the cooling water is introduced into the radiator (21).

Abstract: An opposed-piston, opposed-cylinder engine in which the intake and exhaust pistons are symmetrically arranged has a small inertial force imbalance in the direction of reciprocation of the pistons. A center of gravity of the crankshaft can be displaced from the axis of rotation to at least partially overcome this imbalance. Such counterweighting of the crankshaft cancels a portion of the inertial balance due to the pistons but introduces an inertial imbalance in an orthogonal direction with respect to the piston-induced imbalance. By providing additional counterweights on pulleys rotating at the same speed, but the opposite direction, as the crankshaft, the imbalance can be substantially eliminated to yield substantially a perfectly-balanced engine.

Abstract: A variable compression ratio apparatus mounted on an engine may include an eccentric bearing assembly engaged with the piston through a piston pin, and including an eccentric ring having an eccentric hole so that the piston pin may be rotatably installed therethrough while being eccentric to the eccentric ring, and an eccentric link connected to the eccentric ring to transfer rotation force to the eccentric ring, a first connecting rod rotatably installed at an one side in an axial direction of the eccentric ring, a second connecting rod rotatably installed at the other side in the axial direction of the eccentric ring, and a control shaft connected to the eccentric link to rotate the eccentric bearing assembly by transferring the rotation force to the eccentric ring.

Abstract: A piston for an internal combustion engine, for example a diesel engine, including a body delimited laterally by a skirt and configured to collaborate with walls of a cylinder of axis of revolution C in which the piston can slide along the axis C, the piston including a transverse face that includes a central pip, a peripheral ring, and a bowl of axis of revolution B that extends from the central pip towards the peripheral ring to which it connects at a lip of thickness Ep. The bowl includes, in substantial vertical alignment with the lip, a torus in profile, for example of a dome-shaped, of maximum radius Rt capable of guiding fuel injected under the lip in a region of a re-entrant zone R towards the central pip. The tip of the pip lying on the axis of revolution B of the bowl rises to a height that is a distance Dt of between 5.4 mm and 8 mm, or substantially equal to 7.2 mm, below the level of the peripheral ring.

Abstract: An electrolyzer converts brackish water to hydrogen and oxygen which are utilized in the multiple cylinder IC engine to reduce the amount of diesel utilized in the power plant. This improves emissions and reduces energy cost of operating the engine. Storage tanks for the oxygen and hydrogen are embedded in the diesel fuel tank to provide dual-walled protection for enhanced security and safety in transporting and storing the hydrogen. Possible energy sources for powering the electrolyzer include third rail technology, multiple unit (MU) jumper cables attached to power sources in refueling stations, a solar collector array, and traction motors associated with a dynamic brake system for the vehicle.

Abstract: A compact multi-unit vehicle cooling system for reducing heat toward the engine of a vehicle. The compact multi-unit vehicle cooling system generally includes a radiator, an air charge cooler, a transmission oil cooler, an engine oil cooler and a power steering oil cooler. Each of the components of the present invention is secured in a compact package for installation in a vehicle such as a HUMMER or the like. By utilizing a modulated, compact design, the present invention may more easily be installed and serviced while significantly reducing heat towards the vehicle's engine and thus increasing horsepower.

Abstract: A piston assembly is disclosed for use with an engine. The piston assembly may include a first and second piston crown and a first and second connecting rod. The first and second connecting rods may each have a first end pivotally connected to the first and second piston crowns, respectively, and a second end with a circular opening configured to receive a throw of a crankshaft. The second connecting rod may have a running surface defining at least two outer lands and at least one inner land disposed between the at least two outer lands that alternately support a load of the second piston crown. The piston assembly may further include a bearing. Both the inner and outer lands may simultaneously support the load of the second piston crown against the bearing at a point of highest load on the second piston crown.

Abstract: A valve stem seal for an internal combustion engine includes a seal body having a gas seal assembly spaced from an oil seal assembly in the axial direction of the valve stem seal. The gas seal assembly includes a first gas lip and a second gas lip disposed between the oil seal assembly and the first gas lip.

Abstract: A control device is provided for an engine equipped with an electric oil pump for circulating coolant, and having a flow rate of the coolant restricted, when a temperature of the coolant is lower than a threshold value, as compared to a case where the temperature of the coolant is equal to or higher than the threshold value, and the engine control device includes a coolant temperature sensor detecting a temperature of the coolant, and a control unit stopping the engine in accordance with the temperature to be detected by the coolant temperature sensor after the pump is driven so as to increase the flow rate of the coolant, in a case where the flow rate of the coolant is restricted.

Abstract: A technique which is capable of suppressing a deterioration of lubricating oil used in an internal combustion engine in a more suitable manner. The present invention is provided with an oil pump, oil pressure control means to control the oil pressure of the oil pump, and a determination means to determine whether the degree of deterioration of the lubricating oil is higher than a predetermined level. When it is determined that the degree of deterioration of the lubricating oil is higher than the predetermined level, the oil pressure of the oil pump is made lower, by means of the oil pressure control means, than that at the time when the degree of deterioration of the lubricating oil is equal to or lower than the predetermined level.