An off-road vehicle includes an air intake system that comprises an opening that, in operation, receives air, and an exhaust system that includes an exhaust stack positioned in the opening of the air intake system.

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.

A kit maintains a seal of a joint of a fuel intake port member of a cylinder head and a fuel distribution port member of an intake manifold of a Harley Davidson motorcycle with panhead, ironhead or shovelhead engine. The kit includes an elastomeric band and a pair of circular clamps.

Disclosed is an intake distributor for an internal combustion engine that includes an integrated heat exchanger. This exchanger includes a support plate that ensures its rigid mounting in the distributor and peripheral seal that form an essentially continuous circumferential airtight barrier between the exchanger and the distributor, peripherally dividing the interstitial volume into two. The subdivision plane of the interstitial volume is perpendicular in relation to the plane of the support plate, and the peripheral seal consist of two complementary components that are connected to one another and made integral with the exchanger.

Methods and systems are provided for a vacuum generating throttle. In one example, a method may include pivoting the throttle based on a desired airflow rate and/or vacuum replenishment, where the airflow rate and/or vacuum replenishment are adjusted based on one or more passages arranged interior to the throttle.

An air intake port (10) for a lean-burn gasoline engine (110) comprises an air inlet (14), at least one air outlet (15a, 15b), and an air channel connecting the air inlet (14) to the at least one air outlet (15a, 15b). The air channel comprises an air channel floor (42) and an air channel ceiling (41). The air channel floor (42) is at least substantially flat in a direction of air flow in a region adjacent to the air outlet (15a, 15b).

An intake apparatus of a V-type internal combustion engine including first cylinders arranged along a first direction in a first bank and second cylinders arranged along the first direction in a second bank, the intake apparatus includes a surge tank, first branch paths, second branch paths, and a protrusion. The surge tank is provided above the first and second banks. The surge tank includes a lower wall, an air inlet, first air outlets, and second air outlets. The first air outlets are arranged along the first direction in the lower wall. The second air outlets are arranged along the first direction in the lower wall. The first branch paths connect the first outlets to the first cylinders. The second branch paths connect the second outlets to the second cylinders. The protrusion is provided on the lower wall between a closest first air outlet and a closest second air outlet.

An intake port may include a short port and a long port. The short port may include a main extension portion extending from an intake air inlet; a main inclined portion inclined at a predetermined angle from the main extension portion toward a center of a cylinder; a main vertical portion which bends downward toward the cylinder from the main inclined portion; and a main intake air outlet formed at an end portion of the main vertical portion. The long port may include an auxiliary extension portion extending from the main extension portion; an auxiliary vertical portion bending downward toward the cylinder from the auxiliary extension portion; and a partition wall portion between the auxiliary extension portion and the auxiliary vertical portion, which allows the intake air to flow in a direction opposite to a direction in which the intake air introduced into the cylinder through the short port flows.

An engine including: an exhaust manifold (7) provided near one side surface of an engine; a turbocharger (60) having an exhaust-side inlet connected to the exhaust manifold; and a rocker-arm-chamber-integrated intake manifold (8) disposed on a cylinder head (5) and integrally including a rocker arm chamber (90) and an intake manifold (6). The intake manifold has a wall (101) dividing the rocker arm chamber provided near one side surface of the engine and the intake manifold provided near another side surface thereof to isolate the rocker arm chamber and the intake manifold from each other. The rocker arm chamber has, in its upper portion, a positive crankcase ventilation device protruding therefrom and returning blowby gas to an intake system. The positive crankcase ventilation device has a blowby-gas discharge port (67) connected with a gas conduit (68) through which blowby gas is delivered to an intake-side inlet of the turbocharger.

A power train system includes a heat exchanger reservoir to collect condensate, a layered intake manifold, and integral tubing leading from the reservoir to an interior of the intake manifold via an intake manifold wall such that there is no seal between the condensate port and the manifold. The tubing splits into at least two branches transitioning into a set of wings containing a plurality of nozzles protruding into the interior.