A V-type multi-cylinder engine including a pair of banks, includes: an intake member forming an intake passage through which air is guided from outside; a pair of throttles each configured to regulate an amount of the air sucked into each of the pair of banks through the intake passage; and one single temperature sensor configured to detect a temperature of the air in the intake passage. The intake member includes a pair of openings downstream in a flowing direction of the air. Each the pair of throttles is connected to each of the pair of openings. The temperature sensor is disposed between the pair of openings.

In some embodiments, a fuel rail for a two-stroke internal combustion engine includes a fuel rail body, a fuel inlet component integrated within the fuel rail body as a one-piece component and in fluidic contact with a fuel line, one or more fuel exit ports in fluidic contact with a cylinder of a combustion engine, and one or more fasteners adapted to secure the fuel rail body to a cylinder wall of the cylinder of the combustion engine.

An intake manifold is provided. A first inlet is structured to receive pressurized intake air from a turbocharger. A second inlet is structured to receive exhaust gas recirculation gas from an exhaust gas recirculation system. A third inlet is structured to receive fuel from a fuel line. A plurality of outlets are structured to be fluidly coupled to an engine. An intake manifold passage extends between each of the first, second, and third inlets, and the plurality of outlets. The intake manifold passage is shaped so as to cause at least two reversals in flow direction of each of the intake air, the exhaust gas recirculation gas, and the fuel through the intake manifold passage so as to improve mixing of each of the intake air, the exhaust gas recirculation gas, and the fuel.

The subject matter of this specification can be embodied in, among other things, a gas mixer that includes a convergent-divergent nozzle comprising a convergent portion and a divergent portion and defining a first gas flow path, an air housing comprising an air inlet configured to supply air to the first gas flow path upstream of the convergent-divergent nozzle, a gas housing defining a second gas flow path and including a first gas inlet configured to receive a secondary gas and allow the secondary gas into a second gas flow path, and a gas nozzle positioned parallel to and centrally within the first gas flow path in a convergent portion of the convergent-divergent nozzle, the gas nozzle configured to supply the secondary gas to the first gas flow path upstream of the divergent portion.

Methods and systems are provided for conducting an evaporative emissions test diagnostic on a vehicle fuel system and evaporative emissions control system during engine-on conditions. In one example, a first fuel vapor storage device is separated from a second fuel vapor storage device by a one-way check valve, thus preventing loading of the first fuel vapor storage device during conditions such as refueling operations, diurnal temperature fluctuations, or from running-loss vapors from a vehicle fuel tank. In this way, the evaporative emissions test diagnostic may be conducted during a cold-start event where an exhaust catalyst is below a predetermined threshold temperature required for catalytic oxidation of hydrocarbons in the engine exhaust, without increasing undesired exhaust emissions.

A gas-liquid separation device includes a gas-liquid separation chamber in a head cover that defines a valve gear chamber, a partition wall that changes a direction of blow-by gas that flows in the gas-liquid separation chamber, and a blow-by gas suction passage extending from the gas-liquid separation chamber to an intake-side valve gear chamber. The upstream end of the blow-by gas suction passage defines an opening in a vicinity of a bottom wall of the valve gear chamber (intake-side valve gear chamber). The gas-liquid separation device removes an oil mist in the blow-by gas while using a compact and simple gas-liquid separation structure.

An intake manifold is provided with a surge tank and a plurality of branch pipes branching from the surge tank, and is made up of a plurality of separate pieces. Each of the branch pipes is provided with an intake outlet for outflow of intake air to each cylinder of an engine. The intake manifold further includes a single gas inflow port, a plurality of gas outflow ports opening one in each of the branch pipes, and a gas passage extending in a branch form from the gas inflow port to each of the gas outflow ports. Each of the gas outflow ports is located away from the intake outlet of the corresponding branch pipe by a predetermined passage length.

An engine system having an exhaust gas recirculation apparatus, the engine system including an engine including a plurality of combustion chambers that generates a driving power by combusting fuel, an intake line into which intake gas to be supplied into the combustion chamber flows, an exhaust line through which exhaust gas discharged from the combustion chamber flows, a turbocharger including a turbine provided in the exhaust line and rotated by exhaust gas discharged from the combustion chamber, and a compressor provided in the intake line and rotated in conjunction with the rotation of the turbine and compressing outside air, an EGR apparatus including an EGR line that branches off from the exhaust line at a rear end of the turbocharger and merges into the intake line, and an EGR cooler disposed in the EGR line for cooling exhaust gas flowing through the EGR line, a waste gate valve installed in an exhaust bypass line, which branches off from a front end of the turbine and merges into a rear end of the turbine, and adjusts an amount of exhaust gas flowing into the turbine, and a recirculation valve installed in an intake bypass line, which branches off the intake line at a front end of the engine and merges into the intake line at a front end of the compressor, and supplies a part of the intake gas, which is compressed by the turbocharger, into the intake line at the front end of the compressor.

An apparatus for controlling an engine having a variable valve actuator include: an engine including a plurality of cylinders generating a driving torque by burning fuel, an intake valve selectively opened for supplying air and the fuel to the cylinders through an intake manifold, and an exhaust valve selectively opened for exhausting exhaust gas generated from the cylinders to an exhaust manifold; a variable valve actuator disposed in at least one cylinder of the plurality of cylinders and adjusting lift and duration of the intake valve or the exhaust valve; and a controller deactivating the at least one cylinder of the plurality of cylinders through the variable valve actuator according to a driving region of the engine, and recirculating the exhaust gas exhausted from the cylinders into the intake manifold through the deactivated cylinder.

A plurality of upper fins and a plurality of lower fins are each provided in an EGR passage so as to be adjacent to each other across a predetermined space in a direction perpendicular to an exhaust-gas flow direction. The upper fins and the lower fins are gradually narrowed in width toward their respective projection directions, so that both sides thereof in their width direction have inclined surfaces. A tilt angle of the inclined surfaces of the lower fins is made larger than a tilt angle of the inclined surfaces of the upper fins.