Abstract: A crankcase lubricating system and method for lubricating an engine of a motor vehicle. The crankcase lubricating system includes filterless lubricant circulation system, and a crankcase lubricant containing a fully formulated lubricating base oil meeting or exceeding ILSAC GF-4 or API CI-4 minimum performance standards for engine oils.

Abstract: A fuel delivery system for supplying liquid gas fuel to an engine is disclosed. The fuel can be supplied solely to the engine or together with diesel fuel. The fuel delivery system includes an injector (20) for receiving the liquid gas, and for ejecting the liquid gas in vapour form to the engine E. A bubble preventing mechanism (40, 44, 48; 8, 203, 209, 208) is supplied for preventing the liquid gas from bubbling or boiling in the injector which would impair the ejection of fuel from the injector. The preventing means comprises cooling means which may use a coolant to cool the injector. In one embodiment, the coolant is in the form of bubbled vapour which is directed away from the injector (20) and enters a chamber (206) in which the injector (20) is located, so that the vapour cools the injector (20). The vapour (20) can pass to a vapour block (208) for supply to the intake air of the engine so the vapour is supplied back to the engine together with fuel ejected by the injector (20).

Abstract: A fuel system for improved fuel efficiency may include a fuel injector to transmit fuel in droplet form to a reaction region. A reaction rod may be positioned in the reaction region, where the reaction rod may have a convex end and a concave end. The fuel system may be used with engines such as gasoline engines, turbine engines, diesel engines, and steam engines.

Abstract: An air induction manifold has manifold air passages. A carrier has air passages to communicate air from the manifold air passages to an engine. The carrier has a first sealing interface for a manifold and a second sealing interface for an engine cylinder. The first sealing interface seals the communication of air between the manifold air passage and the carrier air passage. A valve is mounted to the carrier that controls the communication of air through the carrier air passage.

Abstract: The present invention relates to a combustion-engined setting tool for driving fastening elements such as nails, bolts, pins and the like in a constructional component and including a fuel source (11), a fuel conduit (12), from the fuel source (11) to the combustion chamber (13), at least one metering device (30) arranged in the fuel conduit (12) between the fuel source (11) and the combustion chamber (13). The setting tool further includes a control device (20) for operating the metering device. The metering device (30) is formed for metering out fuel in form of a n-number of discrete separate portions, with a volume of separate portions being preset and remaining constant.

Abstract: In a method applicable to a vibration damping engine mount for an internal combustion engine and the vibration damping engine mount therefor, a varying air pressure is supplied to the vibration controllable support mechanism and one of a negative pressure developed in a negative pressure pump and the atmospheric pressure to the vibration controllable support mechanism is supplied to a vibration controllable support mechanism constituting the vibration damping engine mount in accordance with the vibration of the internal combustion engine.

Abstract: Methods and apparatus to flush residual used oil from the lubrication system of an engine during an oil change. The method includes draining used oil from a tank of the lubrication system and then adding fresh oil to the tank. An adaptor or fitting is used to provide an outlet in the lubrication system to flush any residual used oil that may not have been drained along with used oil in the oil tank. The engine may be started such that a scavenging pump of a lubrication system pumps residual used oil out of the system through the outlet. Once a user observes that residual used oil has been substantially flushed from the system, the engine is stopped to terminate the flushing process.

Abstract: A four-stroke internal combustion engine is provided that is capable of use in many power tools, including those power tools subjected to tippable applications. The engine includes an oil reservoir and a crank chamber separated by a divider. The divider includes a slot that allows lubricant to move from the oil reservoir into the crank chamber and from the crank chamber into the oil reservoir in response to pressure fluctuations of the engine. The engine can include an insert positioned within the slot to at least partially restrict the slot thereby modifying the lubricant communication between the crank chamber and the oil reservoir through the slot. The insert can be wedge-shaped and at least partially define a passage such that when the insert is positioned within the slot the transfer of lubricant between the crank chamber and the oil reservoir occurs through the passage.

Abstract: An engine part that contacts oil during engine operation has a coating layer that provides one or more oil additives into the oil during a desired period of engine use. The coating layer includes one or more oil additives that are incorporated into the oil over the period of engine use as well as a coating matrix that releases the additive(s), e.g. by dissolution or diffusion of the additive(s), into the oil over the desired period of engine use. The additives replenish the oil to maintain or improve oil performance over the period of engine use.

Abstract: A fuel supply apparatus reduces the fuel vaporization and leakage. The positions of vaporization and leakage and their amount in the fuel tank and the fuel pipe are detected when using a low boiling point fuel having a vapor phase in the normal temperatures and atmospheric pressures, and the fuel state is controlled based on those detected values. By providing another container made of elastomatic material having an expandable mechanical characteristic inside the fuel storing container, the low boiling point fuel is stored in the separate container. A flow rate controlling apparatus is provided for heating or cooling the fuel pipe leading the low boiling point fuel stored in the fuel storing container to the engine. A flow rate controlling apparatus is provided for adjusting the flow rate of the fuel in the fuel pipe for leading the low boiling point fuel stored in the fuel storing container to the engine.

Abstract: A series type hybrid electric vehicle that controls an internal combustion engine, generator, and electric motor for reducing the load applied to the internal combustion engine when the internal combustion engine is restarted, lowers the thermal stresses to the internal combustion engine when the engine is turned off and is able to remove excess fuel when turning off the internal combustion engine.

Abstract: The gas engine of the present invention has a pilot oil fuel valve, a pilot oil pump, and first and second pipes connected to a pilot oil main pipe, for each of a plurality of combustion chambers. An operating pilot oil tank and an ignition stimulant-added pilot oil tank are connected via a switching valve to a third pipe, connected to an end of the pilot oil main pipe. Before operating stops, the pilot oil is discharged by opening an exhaust valve, and thereafter, the switching valve is switched and pilot oil which the ignition stimulant has been added to is supplied into the pipe. Consequently, the pilot oil downstream from the main pipe is replaced with the pilot oil which the ignition stimulant has been added to. Therefore, at the time of the next activation, pilot oil which the ignition stimulant has been added to is sprayed from the fuel valve, and, as a result, misfire at the time of activation is reduced, and a highly reliable engine is obtained.

Abstract: An air cleaner, intake manifold, and valve cover are integrated together for attachment to a vehicle engine. The air cleaner is positioned directly between the intake manifold and valve cover to provide a compact induction module. The induction module is mounted to the engine as a single unit. A throttle body is also incorporated into the intake manifold. A tube interconnects the air cleaner and the throttle body. An air filter is installed within the air cleaner to remove contaminants from air prior to entry into the tube.

Abstract: An engine air intake manifold has two main body sections that are divided along an airflow direction and mated tightly against each other at oppositely facing mating parts so as to form an air intake passage therein. A gas passage is formed along the mating parts. The gas passage opens into a downstream portion of the air intake passage and supplies a secondary additive gas thereto. Preferably, the engine air intake manifold has air intake branch pipes with valve mounting blocks for mounting air intake control valves to a downstream portion of the air intake branch pipes.

Abstract: There is provided a multicylinder four-cycle combustion engine, in which a communication hole is formed, to allow gases to flow smoothly form one cylinder to another so that the pumping loss occurring within the cylinders can be reduced. The combustion engine (E) includes an engine casing (EC) having defined therein a plurality of cylinders (2A to 2D), each having a cylinder bore (20A to 20D), and a crank chamber (30A to 30D) below the respective cylinder bore. A partition wall (21) separating the neighbor cylinder bores (20A, 20B; 20C, 20D) of the cylinders (2A to 2D) and the crank chambers (30A to 30D) from each other is formed with a communication hole (4). An open edge portion (4aa) of the uppermost edge (4a) thereof, which opens into the cylinder bore (20A to 20D) has a circumferentially intermediate major portion extending in a direction substantially perpendicular to the cylinder longitudinal axis (CH).

Abstract: A bracket and nut assembly including a bracket having a first end and second end. The first end includes a first substantially planar portion spaced apart from and positioned substantially parallel to a second substantially planar portion. A third portion interconnects the first and second portions. A first aperture extends through the first portion and a second aperture extends through the second portion. The first and second apertures are axially aligned with one another. A nut includes a substantially cylindrical hollow body having flats, a first end and a second end. A flange radially extends from the first end. The flange is captured between the first portion and the second portion of the bracket such that the nut is operable to translate and rotate relative to the bracket.

Abstract: A connection structure between a plastic gear and a shaft permits easy phase matching relative to a device mounted on the shaft, and easy meshing of a gear provided on the shaft with another gear. The connection structure includes a plastic gear, a shaft, and a set plate. The plastic gear has a geometric recess which receives the correspondingly-shaped set plate therein. The set plate includes a central shaped opening. The shaft is provided with a mating extension extending from a first end, and which fits within the shaped opening. The mating extension is formed such that the plastic gear may be mounted thereon in a first position wherein the plastic gear is not positioned to interact with a mating gear, and the plastic gear can be slidably moved thereon to a second position such that the plastic gear is positioned to interact with the mating gear.

Abstract: In a system for controlling an internal combustion engine having a plurality of cylinders and connected to the automatic transmission and mounted on a vehicle and the operation of the engine is switched between full-cylinder operation during which all of the cylinders are operative and cutoff-cylinder operation during which some of the cylinders are non-operative, based on at least the load of the engine, a gradient of road on which the vehicle runs is estimated and the cutoff-cylinder operation is prohibited when the estimated gradient is equal to or greater than a threshold value. With this, it becomes possible to generate sufficient deceleration, when the vehicle runs a downhill during cutoff-cylinder operation, while ensuring to prevent the operator to feel excessive acceleration.

Abstract: A pump/valve assembly forming part of a circuit for circulating a liquid fluid has a pump and a proportional-control valve unit (2) in series with the pump. The valve unit (2) has a valve (3), an electrical actuator (4) and a position sensor (5) which are fixed to a movable member (3?) sealing the valve (3) for displacement therewith, and control means (6) controlling the actuator (4) according to the position of the movable member (3?) indicated by the sensor (5) and a reference signal. The valve unit (2) is subjected to a procedure indexing the position of the movable member (3?) and setting parameters for the control means (6) at the beginning of each new operating cycle of the assembly, and the pump (1) is rotated at a constant speed selected from a limited number of predetermined speeds at least during part of each operating cycle.

Abstract: An engine cooling system for cooling an engine installed in an off-road vehicle includes a coolant circulating system including a thermostat held in a thermostat case, and connecting water jackets formed in the engine and a radiator. The coolant circulating system has a metal connecting pipe held by a first bracket attached to an upper end part of a first cylinder unit of the engine. The thermostat case is an individual member separate from component members of the cylinder unit, and the thermostat case is held by the first bracket. The first bracket is formed integrally with the metal connecting pipe. When the engine is a V engine having a front cylinder unit and a rear cylinder unit, the metal connecting pipe is extended between the front and the rear cylinder unit, and is held by brackets on the front and the rear cylinder unit.