Abstract: In a method for controlling the heat in an internal combustion engine for a vehicle with a coolant circuit and actuable devices for influencing the heat balance of the internal combustion engine, wherein a coolant temperature and further operating parameters of the internal combustion engine are recorded, the actuable devices are operated as a function of the coolant temperature and the further operating parameters of the internal combustion engine in such a manner that an output value for determining a control variable is provided by means of a basic characteristic diagram as a function of the rotational speed and the load on the internal combustion engine, and this control value is corrected by means of a controller as a function of the coolant temperature and/or the further operating parameters.

Abstract: A marine diesel engine system includes a diesel engine having a plurality of cylinders. The system also includes, proximate the engine, a primary engine lubricant and an additive selected from certain alkylamine-alkylphosphates, 500 TBN calcium sulfonate and mixtures thereof. A means for blending the lubricant and additives into a mixture for introduction into a cylinder is provided. Thus lubricant properties may be modified depending upon engine conditions.

Abstract: A lubricating apparatus for an internal combustion engine includes an oil pump 12 comprising a feed pump 13 and scavenging pumps 14 and 15. Then oil pump 12 and an oil tank 16 are arranged at the outside of the internal combustion engine 9. A pump shaft for the pumps 13, 14 and 15 can be arranged in a same direction as that of a crank shaft of the engine 9. The feed pump 13 and two scavenging pumps 14 and 15 are arranged in serial order with the feed pump being farthest from the engine 9. A check valve 24 can be arranged in a passage of the discharge side of the feed pump 13. A relief valve 23 can be arranged between a passage of the discharge side of the feed pump 13 and a passage of the intake side of the scavenging pump 14.

Abstract: An engine cooling system has a primary cooling circuit having with a coolant pump to pump coolant to the engine, an engine return line, a radiator and a bypass in parallel with the radiator. The primary circuit also has a flow control valve to control flow between the radiator and the bypass to allow fluid to flow from the radiator only when coolant temperature is above normal operating temperature. The system also has a secondary cooling circuit with a heat exchanger and a temperature responsive control valve and a heater circuit connected to a passenger compartment heater. The temperature responsive conrol valve shuts off flow through both or one of the inlets depending on coolant temperature.

Abstract: An improved lubrication structure is provided in an engine by optimizing the structure for recovering scooped oil for enhanced oil recovery efficiency. The oil, which has been scooped up and scattered by the rotation of a clutch, is captured within a concave groove provided within a cylindrical inner surface of a case cover facing the clutch. The captured oil is smoothly guided from the concave groove to an oil receiver of a crankcase via a bent upper edge part of an oil guide plate. The recovered oil passes through dropping holes of a recovered oil path and is supplied to a gear engagement part of a transmission system located below the recovered oil path.

Abstract: An internal combustion engine, Z-engine. The compression part and the working part are separated. New gas is transported to the upper side of the piston. Below there is a small chamber corner. When the piston comes nearer the upper hollow part, the combustion gases go out from the cylinder through exhaust-valves. After the changing of the gas, before filling the upper chamber, there is a secondary compression, the firing of the mix, or fire. In advance of the compression can be other than the volume of the working pistons together. The side effect of the piston can be taken away by means of a double cam mechanism.

Abstract: The present invention discloses an air-entrainment mechanism for carbureted engine. The mechanism includes a plunger valve controlled by a solenoid. The solenoid is powered by a battery with a switch electrically coupled thereto. The plunger valve is interconnected to the carburetor to allow additional air entrainment. The solenoid is coupled to the valve for opening and closing the valve. The switch electrically couples the solenoid to the battery to activate the solenoid for movement of the valve. The switch disclosed herein includes a temperature sensor and an engine-running sensor. The switch is then closeable when the temperature sensor detects an engine temperature within a predetermined range as long as the engine is not already running.

Abstract: Recesses are provided in portions of a head cover and a crankcase which are opposed to outer peripheries of a timing chain and a balancer-driving chain driven by a crankshaft of a vertical engine, whereby vertical walls and horizontal walls are formed to oppose to outer peripheral surfaces and lower surfaces of the timing chain and the balancer-driving chain. An oil scattered from the timing chain and the balancer-driving chain by a centrifugal force is caught on the vertical walls, and the oil flowing down along the vertical walls by gravitation is retained on the underlying horizontal walls, whereby the oil can be brought into contact with the chains without waste to effectively lubricate the chains.

Abstract: In an internal combustion engine, a piston reciprocating in a cylinder and a crankshaft are linked with each other by a piston-crank linking mechanism. The crankshaft includes a counterweight. When the piston is located in the proximity of a bottom dead center, an outermost portion of the counterweight crosses an imaginary extension line extended from a piston pin in an axial direction of the piston pin.

Abstract: An internal combustion engine includes a split crankcase with spaced-apart journal walls. Each journal wall has a bearing hole formed therein. The engine also includes rotary bearings for supporting rotary movement of a crankshaft. A backlash-absorbing mechanism is situated proximate a first one of the rotary bearings, for cushioning radial movement of an outer bearing race. Axial movement-restraining structure is also provided adjacent the outer race, for limiting axial movement thereof. The axial movement-restraining structure may include an engaging groove provided in an inner circumferential surface of the outer race, and a restraining clamp member operatively attached to a surface of the crankcase. The restraining clamp member may include a hook portion which engages with the engaging groove of the outer race. The axial movement-restraining structure allows at least one of the crankshaft support bearings to be a roller bearing or a needle bearing, instead of a ball bearing.

Abstract: A lubrication pump coupled to the engine is sized such that the it can supply the engine with a predetermined flow volume as soon as the engine reaches a peak torque engine speed. In engines that operate predominately at speeds above the peak torque engine speed, the lubrication pump is often producing lubrication fluid in excess of the predetermined flow volume that is bypassed back to a lubrication fluid source. This arguably results in wasted power. In order to more efficiently lubricate an engine, a lubrication circuit includes a lubrication pump and a variable delivery pump. The lubrication pump is operably coupled to the engine, and the variable delivery pump is in communication with a pump output controller that is operable to vary a lubrication fluid output from the variable delivery pump as a function of at least one of engine speed and lubrication flow volume or system pressure.

Abstract: The HELI-SHAFT intake exhaust manifold system is comprised of a shaft with two helical and parallel runners cutout around its length. Surrounding the shaft is a sleeve of the same length to enclose and separate the two runners. The intake runner has an opening at the front end of the shaft to provide an inlet for the air/fuel mixture to enter from the intake plenum. Exhaust gases exit the rear of the shaft through the exhaust opening; thus allowing the air/fuel mixture and exhaust gases to travel through the sleeved shaft following the runners in a parallel path. The shaft also provides locations for spark plugs to be inserted. The sleeve contains port openings located over each intake and exhaust runner positioned to provide alignment during rotation with individual combustion chambers aligned in a row matching both the firing order and cycle timing of the engine.

Abstract: A soundproof engine-driven operating machine has a small installation area, is easy to assemble and disassemble, and has superior cooling effects. The soundproof engine-driven operating machine includes an engine, an operating machine main body that is driven by the engine, a base frame that supports the engine and the operating machine main body in a vibration-proof structure, and a case fitted to the base frame and accommodating the engine and the operating machine main body. One part of the case includes a first-story chamber accommodating the engine and the operating machine main body, first and second heat exchangers, each having a cooling fan and being arranged above the first-story chamber, the first and second heat exchangers performing heat conversion relating to the operation of the engine by using the cooling fans, arranged separately in a ventilation path, and a second-story chamber accommodating a muffler for discharging engine air.

Abstract: A fuel system for on-board vehicle fuel separation to supply engine fuel compositions formulated as a function of driving cycle conditions. The invention results in improvements in one or more of feed efficiency and combustion emissions.

Abstract: A device for heightening engine efficiency is provided with a heat-insulating seat of engine having a plurality of air inlets communicable with oil-gas inlets. The air inlets are provided with a valve, and the heat-insulating seat is provided with a cam mechanism, which is connected to a carburetor control device by means of an operation piece. When the carburetor is operated to drive the cam mechanism to open the valve such that fresh air is allowed to enter into the engine, and the combustion efficiency can be thus heightened. As soon as the accelerator is stopped, the valve is closed automatically.

Abstract: Oil jets are mounted in upper two cylinders in a cylinder block of a 4-cylinder vertical engine to inject an oil to rear faces of pistons received in the two cylinders. Thus, although lower pistons are cooled more effectively by the oil dropped by gravitation through oil return bores provided in journal support walls, the upper pistons are forcibly cooled by the oil injected from the oil jets, so that the four pistons can be cooled equally to prevent insufficient cooling and excessive cooling, while minimizing the required amount of the oil.

Abstract: An oil separator for an internal combustion engine includes a basket that houses a filter media for separating air from oil particles. A portion of the basket is disposed within a valve cover. A breather lid is fitted over the basket for sealing the filter media housed within the basket. Air is drawn through the breather lid and the filter media to separate the air from the oil particles contained in the filter media. The design may also include a baffle for preventing the oil from saturating the filter media. The integration of the filter media with sealing eliminates parts and maximizes the efficiency and effectiveness of separating the oil particles from the air.

Abstract: A four-stroke engine includes a piston cylinder, and a piston located in the cylinder and movable within the cylinder. The engine includes a crankcase attached to the cylinder, the piston providing a separation boundary of a combustion portion of the cylinder from the crank case, and a crank member located within the crankcase and operatively connected to the piston. The engine including components for operating the engine in a four-stroke sequence, and components for introducing a fuel mixture into the combustion portion of the cylinder, the fuel mixture having an ability to lubricate. The engine including a construction and/or configuration for promoting passage of a portion of the mixture from the combustion portion of the cylinder to the crankcase in a sufficient amount to provide lubrication within the crankcase without reservoir lubricant in the crankcase.

Abstract: The invention relates to an oil collecting arrangement for an internal-combustion engine having an oil collecting housing (2) arranged below a crankcase, which oil collecting housing (2) has at least two sections of different space depths, in a deeper space section (4), an oil scavenging line (8) being provided by means of which the lubricating oil is delivered to the consuming devices by way of a pump. It is suggested that, in the oil collecting housing (2), a separate insertion part (18) is fastened which, on the one hand, has an oil barrier (22, 28) aligned transversely to the longitudinal dimension of the oil collecting housing (4) (2), which oil barrier (22, 28) prevents a flowing back of the lubricating oil from the deeper space section (4) into the crank space and/or into the flatter space section (12) in the inclined position of the internal-combustion engine, and which, on the other hand, has oil return ducts (34, 38, 40) for the lubricating oil flowing back from the cylinder head.

Abstract: Internal combustion (I.C.) systems and methods provided herein substantially eliminate incomplete combustion, unburned hydrocarbon emission, and hydrocarbon, CO, NOx, and SOx emissions. A method of one embodiment includes the steps of providing a fuel stream containing acetylene, providing an I.C. engine, and introducing the fuel stream to the engine's intake port. A method of another embodiment includes the steps of providing a fuel source selected from the group consisting of acetylene and hydrogen, providing an I.C. engine, and introducing the fuel source to the engine's intake port. Still another embodiment's method includes the steps of providing a fuel stream that doesn't include gasoline, diesel fuel, or an alcohol selected from the group consisting of C1–C20 alcohols, providing an I.C. engine, and introducing the fuel stream to the engine's intake port. In an embodiment, an I.C. system is provided, including an I.C. engine and a fuel stream containing acetylene.