An injector arrangement structure includes an air cleaner which is arranged at a rear side of an engine for a vehicle, a rear suspension which extends vertically at the rear side of the engine, and a first injector which is attached to the air cleaner. The air cleaner includes an outlet tube configuring a clean side of the air cleaner. The rear suspension and the outlet tube overlap each other in a side view. A partition wall dividing an intake passage vertically is provided inside the outlet tube. The first injector is attached from a lower side of the outlet tube so as to inject fuel toward the partition wall.

The invention relates to a an air supply arrangement (100) for supplying air from the atmosphere towards an internal combustion engine in a vehicle, the air supply arrangement comprising an air intake (101) for intake of air from the atmosphere, an air outlet (102) for outlet of air towards the internal combustion engine, and an air duct (103) for leading air from the air intake (101) in a downstream direction to the air outlet (102). A separator (200) is arranged in the air duct (103) so as to divide the air duct (103) into an upstream portion (104) and a downstream portion (105) for filtering of atmospheric air from debris by passage of said atmospheric air through the separator (200). The air supply arrangement (100) further comprises a compressed air delivery arrangement (300) being arranged to supply compressed air towards the separator (200) for cleaning the separator (200) from assembled debris.

An intake system of engine comprises an intake pipe (8), an air intake manifold (6), and an auxiliary intake assembly (4) disposed on the intake pipe (8) and located before the air intake manifold (6) of an engine. The auxiliary intake assembly (4) comprises an auxiliary air inlet passage, an auxiliary air outlet passage (21), and a central passage (39). Air enters through the auxiliary air inlet passage, comes out from the auxiliary air outlet passage (21) and enters the central passage (39), so as to be mixed with air from the intake pipe (8). The present invention further relates to an engine intake system, comprising an electronic booster (4″) located upstream of the air intake manifold (6) of an engine. An air flow enters from an air inlet (4241″), flows out from an air outlet (4242″), is mixed with air that flows through the intake pipe (8), and then is inhaled into a cylinder of the engine. The present invention further relates to a engines comprising the above intake systems. These intake systems and engines can effectively reduce discharge, reduce fuel consumption, improve engine efficiency, improve a low-speed torque feature of the engines, and improve a low temperature cold start effect of the engines.

A heat storage cover is provided in an engine room. The heat storage cover covers an engine from above and surrounds the periphery of an upper portion of the engine to internally store, through the medium of air, heat dissipated from the engine and block upward heat dissipation. The engine includes an air inlet for introducing, into a combustion chamber, high temperature air obtained by the heat storage cover blocking the upward heat dissipation.

The intake manifold includes an intake air introduction port, a surge tank and a plurality of intake pipes. The intake air introduction port is connected to one end side of the surge tank in a direction in which the intake pipes are arranged. The surge tank is provided with a stepped portion over the direction in which the intake pipes are arranged. The stepped portion has an erected wall erected from a surface of the surge tank and connected to the plurality of intake pipes, and a curved wall connecting a tip side of the erected wall and the surface of the surge tank. Further, the surge tank is provided with a concave portion recessed toward the stepped portion at an intermediate portion in the direction in which the intake pipes are arranged.

An apparatus and a method are provided for a multiple inlet air box to communicate an airstream through an air filter to an air intake duct of an internal combustion engine of a vehicle. The multiple inlet air box is comprised of a housing that supports the air filter within an interior of the housing. A mount portion within the housing fixedly receives a base of the air filter. Multiple air inlets couple with corresponding air inlet ports of the vehicle to direct the airstream into the multiple inlet air box. A duct directs the airstream from the multiple air inlets to the interior of the housing. A conduit communicates the airstream from an interior of the air filter to the air intake duct of the internal combustion engine.

An intake manifold for an engine is arranged between a cylinder head port mounted on a cylinder head and a surge tank. The intake manifold includes: a first runner including a first end provided with a first inlet portion connected to the surge tank, and a second end that is branched at a position spaced apart from the first inlet portion by a predetermined distance and is respectively connected to first and fourth runners formed in the cylinder head port; and a second runner including a second end provided with a second inlet portion connected to the surge tank at a position adjacent to the first inlet portion, and a second end that is branched at a position spaced apart from the second inlet portion by a predetermined distance and is respectively connected to second and third runners formed in the cylinder head port.

An intake manifold for an engine is arranged between a cylinder head port mounted on a cylinder head and a surge tank. The intake manifold includes: a first runner including a first end provided with a first inlet portion connected to the surge tank, and a second end that is branched at a position spaced apart from the first inlet portion by a predetermined distance and is respectively connected to first and fourth runners formed in the cylinder head port; and a second runner including a second end provided with a second inlet portion connected to the surge tank at a position adjacent to the first inlet portion, and a second end that is branched at a position spaced apart from the second inlet portion by a predetermined distance and is respectively connected to second and third runners formed in the cylinder head port.

An engine peripheral structure includes an engine body mounted in an engine room, an intake system connected to the engine body, and a supercharger provided in the middle of the intake system. The intake system includes a low-pressure intake passage connected upstream in an intake direction of the supercharger, and a high-pressure intake passage connected downstream in the intake direction of the supercharger. The intake system has the high-pressure intake passage turned back at the supercharger with respect to the low-pressure intake passage, and has the low-pressure intake passage and the high-pressure intake passage extended on a left side surface of the engine body so as to be at least partly overlapped with each other in the up-down direction V.

In an engine that includes a blow-by-gas returning system configured to direct blow-by gas within a crankcase to an intake system through an inside of a head cover, the intake system includes a cover intake-passage disposed at a blow-by-gas outlet of the head cover, and the cover intake-passage communicates with a blow-by-gas passage of the blow-by-gas outlet.