Abstract: An outboard motor that significantly reduces or prevents discoloration around an exhaust opening includes an engine, a drive shaft, a propeller shaft, a housing, an exhaust passage, a water intake passage, and a valve. The exhaust passage guides an exhaust gas from the engine toward the discharge chamber inside the housing. The water intake passage guides water, which enters an inside of the housing, to the discharge chamber when a forward propulsive force is generated. The valve regulates passage of the exhaust gas at the first opening due to water pressure when a forward propulsive force is generated. The valve permits the passage of exhaust gas at the first opening due to exhaust pressure when a backward propulsive force is generated.

Abstract: An outboard motor with improved maintainability and attachable to a hull of a marine vessel includes an internal combustion engine and a cowl to cover the internal combustion engine. The internal combustion engine includes an oil filler to feed oil thereto and an oil filter to filter the oil. In a case that a direction perpendicular or substantially perpendicular to a bottom of the hull is a vertical direction, the cowl is separable into a top cowl to cover an upper portion of the internal combustion engine and a side cowl to cover a side portion of the internal combustion engine. At least a portion of the oil filler or at least a portion of the oil filter is located above a separating line which is a boundary between the top cowl and the side cowl.

Abstract: A method for operating an injector on an internal combustion engine includes the steps of: introducing a fuel into a combustion chamber of the internal combustion engine by way of the injector; capturing, for a plurality of injection events, a wear value for the injector; assigning each respective one of the wear value that is captured to a respective one of a plurality of wear value classes; determining, for each of the plurality of wear value classes, a class frequency of a plurality of the wear value that are captured and assigned to a corresponding one of the plurality of wear value classes; calculating, based on a plurality of class frequencies of the plurality of wear value classes, a total wear value for the injector; and evaluating a condition of the injector based on the total wear value.

Abstract: A first piece forms a part of a surge tank. A second piece forms the surge tank together with the first piece. The first piece includes an introduction hole through which blow-by gas is introduced. The first piece includes a first flange fixed to the second piece. The second piece includes a second flange fixed to the first flange. A cover is located inside the surge tank. The cover defines, together with an inner surface of the surge tank, a gas passage extending from the introduction hole into the branch pipe. A part of the cover is sandwiched between the first flange and the second flange.

Abstract: An intake system for an engine includes: an intake manifold including a plurality of ports; a cover mounted to the intake manifold over the plurality of ports; a fluid distribution track defined by the cover, the fluid distribution track including a plurality of openings in fluid communication with an interior of the intake manifold by way of the plurality of ports of the intake manifold; and a dampening material between the cover and the intake manifold, the dampening material configured to dampen at least one of noise, vibration, and harshness.

Abstract: Piston cooling jet devices, or spray jet devices, for spraying oil onto an underside of a piston are provided. The spray jet devices may include two or more orifices such that oil is directed at an intake side portion and an exhaust side portion of the piston when the spray jet devices are selectively coupled to an engine. The spray jet devices may further include a valve to selectively control the flow of oil through a fluid passageway to the two or more orifices. For example, a check valve may be positioned and located such that the spray jet devices do not spray oil when the pressure of the oil system is less than a threshold value.

Abstract: A balancer structure for an internal combustion engine and the internal combustion engine are provided. A transmission driving gear are arranged to be rotatable integrally with a crankshaft. A transmission driven gear is arranged to be rotatable integrally with a first balance shaft. The transmission driven gear meshes with the transmission driving gear. A balancer driving gear is arranged to be rotatable integrally with the first balance shaft. A balancer driven gear is arranged to be rotatable integrally with the second balance shaft. The balancer driven gear meshes with the balancer driving gear. The first balance shaft includes an output portion. The output portion outputs torque to an engine-driven accessory.

Abstract: A vehicle includes an engine main body positioned behind a seat and at least partially in the center of the vehicle width direction; a first air cleaner positioned above the engine main body so as to define and form a part of an intake passage of the internal combustion engine; and a second air cleaner disposed upstream of the first air cleaner so as to define and form a part of the intake passage, in which the second air cleaner is positioned outside the first air cleaner in the vehicle width direction. This configuration can relatively shorten the length of an intake passage including an air cleaner in vehicles, including vehicles that are frequently used on rough terrain.

Abstract: An air induction system is disclosed for an engine that comprises an air cleaner, an inlet air conduit, a Mass Air Flow Sensor (MAFS), and a secondary air induction system. The air filter encloses a filter element that removes contaminants from the air supplied to the engine. A MAFS is disposed in the inlet air conduit and measures the mass of the air flowing through the inlet air conduit to an intake manifold of the engine and provides data to an engine control module that controls the air/fuel mixture supplied to the engine. The secondary air system receives air from the air cleaner that is provided to a vehicle component and includes an inlet port located upstream from the MAFS. The secondary induction conduit draws air through a port integrated with the MAFS bore with an air pump to provide clean air to an engine component or exhaust system component.

Abstract: Operating a gaseous fuel engine system includes detecting preignition in one or more of a plurality of cylinders based on a monitored cylinder pressure during combustion of a gaseous fuel such as a gaseous hydrogen fuel. Operating a gaseous fuel engine system also includes reducing a fuel injection amount for the one or more of the plurality of cylinders to a derated fuel injection amount that is based on a timing of the detected preignition. Fuel injection amount may be reduced to a greater relative extent if detected preignition is early, and to a lesser relative extent if detected preignition is later, in an engine cycle. Related apparatus and control logic is also disclosed.

Abstract: A thermal management assembly includes a fluidic command device connected to a first and second pump group and having four inlet and outlet ports and an auxiliary duct connecting the pump groups. The fluidic command device is configurable in a first configuration, in which working fluid flows into the first inlet port and out of the first outlet port, flowing into the first pump group, the auxiliary duct and the second pump group, a second configuration, in which working fluid flows into the second inlet port and out of the second outlet port, flowing in the pump groups, preventing flow in the auxiliary duct, and a third configuration, in which working fluid flows into the third inlet port and out of the third outlet port, flowing into the first pump group, and into the fourth inlet port and out of the fourth outlet port, flowing into the second pump group.

Abstract: An internal combustion engine includes an asynchronous injection valve configured to inject water into an intake port when one or more intake valves are closed and a synchronous injection valve configured to inject water into the intake port when the one or more intake valves are open. The asynchronous injection valve and the synchronous injection valve are configured to have injection characteristics that are different between the asynchronous injection valve and the synchronous injection valve.

Abstract: A guiding portion of an intake valve head includes a specific tangent line, which, when the intake valve is in a fully open state, intersects with at least one selected from an ignition plug and a closed exhaust valve. A line segment that agrees with a tangent line contacting the guiding portion and extends from a contact point of the tangent line with the guiding portion to an intersection point of the tangent line with a central axis of the head is defined as a first line segment, a line segment that agrees with the central axis and extends from the intersection point toward the intake passage is defined as a second line segment, and an angle formed by the first second line segments is defined as a specific angle. The tangent line that minimizes the specific angle is the specific tangent line.

Abstract: A fuel selector for use with a dual fuel generator includes a selector plate, a first fuel valve assembly positioned adjacent the selector plate and actuatable between an ON position and an OFF position to selectively control a first fuel flow to an engine of the dual fuel generator, and a second fuel valve assembly positioned adjacent the selector plate and actuatable between an ON position and an OFF position to selectively control a second fuel flow to the engine of the dual fuel generator. A selector switch coupled to the selector plate is linearly translatable from a first position to a second position, so as to enable positioning of only one of the first fuel valve assembly and the second fuel valve assembly in the ON position at a given time, such that the first and second fuel valve assemblies cannot be in the ON position concurrently.

Abstract: A media channel assembly for an internal combustion engine includes at least one distribution channel for distributing a medium to various components of the internal combustion engine, and at least one supply channel, which is coupled to the distribution channel by way of at least one media passage opening. At least a wall region of the distribution channel lying opposite the media passage opening is curved, at least in parts, toward the media passage opening. An internal combustion engine includes such a media channel assembly, and a motor vehicle includes such an internal combustion engine.

Abstract: An exhaust manifold gasket device for precisely aligning a gasket for installation includes a gasket that has an exhaust hole and a coolant hole thereby facilitating the gasket to be positioned between an exhaust manifold and a cylinder head of an internal combustion engine. The gasket has a pair of locating slots each extending into the gasket to facilitate each of the locating slots to receive a respective head bolt in the exhaust manifold. In this way the gasket can be precisely aligned for final installation.

Abstract: The present invention belongs to the technical field of diesel engines, and particularly relates to an engine cooling system and a cooling method therefor. In the engine cooling system of the present invention, when an engine needs to be warmed up, a first valve is opened, a lower engine body water storage chamber is in communication with an upper engine body water storage chamber, and some of the cooling water directly flows into the lower engine body water storage chamber from the upper engine body water storage chamber. The flow of the cooling water entering an engine body is reduced, and under the condition that heat dissipated by the engine is unchanged, the temperature rise of the cooling water flowing through the engine body such as a cylinder sleeve upper cooling water chamber and a cylinder sleeve lower water jacket is faster, such that an engine warming effect is improved.

Abstract: This disclosure relates to improved water pump assemblies and related methods. The water pump assemblies can include pre-mounted fasteners and gaskets to facilitate easy installation or reinstallation of the water pump assemblies. The water pump assemblies further can include a temperature-control valve assembly positioned within a housing of the water pump assembly. The water pump assembly can include a variety of other pre-installed components. Other embodiments are disclosed.

Abstract: An electric heating device in an exhaust gas system, the device having an outer circumferential, circular, housing, wherein a rib structure is arranged in the housing. The rib structure can be heated by applying an electric current. The rib structure is arranged with rib rows parallel to one another in the housing, wherein the parallel-arranged rib rows are arranged such that they are electrically connected to one another in series or in parallel.

Abstract: Embodiments of the present disclosure may include a system for delivering oxygen to an internal combustion engine of a vehicle including an air filter for removing contaminants from an ambient air source. Embodiments may also include a main air supply pump driven by a first rotational power source to produce pressurized high temperature air. In some embodiments, the first rotational power source may be powered by an internal combustion. Embodiments may also include an engine of the vehicle. In some embodiments, the air filter may be in pneumatic communication with the main air supply pump generating the pressurized high temperature air. Embodiments may also include a heat exchanger for lowering a temperature of the pressurized high temperature air to produce pressurized cold temperature air.