Abstract: An intake air crossover arrangement for an internal combustion engine having two cylinder banks in a V-shaped arrangement in which air compressed by at least one, and preferably two, turbochargers, is delivered via air ducts to respective intake manifolds for each cylinder bank wherein the air ducts twist at least in the crossover region and have a cross-sectional shape such that they sit in flat contact with one another, preferably by use of an integrally formed crossover pipe containing portions of both ducts. The crossover pipe may further include integral connections for exhaust gas recirculation respectively for each duct.

Abstract: A fuel routing structure for use in a vehicle having a V-type engine is provided. The structure has fewer parts, is compact, and facilitates ease of assembly and maintenance for a vehicle where fuel injection valves are attached to an intake manifold, which contains an intake passage communicating with intake ports of a pair of cylinder banks. Each fuel injection valve is attached to an upper part of the intake manifold, so that center lines of the fuel injection valves corresponding to both banks are crossed at an intersection over the intake manifold when a vehicle is viewed from the side. A fuel rail is provided with a fuel passage pipe, the axis of which is arranged in the vicinity of the intersection of the center lines of the fuel injection valves. The axis of the fuel passage pipe may be parallel to the crankshaft and may extend linearly and connected to all the fuel injection valves.

Abstract: To reduce the number of component parts for supporting an air cleaner and facilitate the assembly work of the air cleaner in a V-type engine having part of an air intake device including the air cleaner arranged between a pair of banks. The air cleaner arranged on the side of the two banks is supported by cleaner supporting units integrally provided in the cylinder blocks or the cylinder heads in the two banks.

Abstract: An air cleaner housing includes an upper case, a partition wall and a lower case. The inside thereof is partitioned into an upper, filtered side and a lower unfiltered side. Intake funnel pipes, connected to front and rear cylinders, project into the filtered side. An air cleaner element is provided on the front side relative to a hollow plenum above the intake funnel pipes. Inlets in side surfaces of the unfiltered side face toward a V bank of the engine. During use, air enters the bottom of the housing, and is cleaned by the air cleaner element. The clean air flows through the filtered side of the housing, into the intake funnel pipes and toward the cylinders on the lower side. A raised portion is formed on the front upper side of the upper case, and the air cleaner element is disposed inside the raised portion.

Abstract: To secure a large space that can be utilized effectively above an air cleaner, a low-deck vehicle 10 is constructed to mount an engine shaped like a letter V in the fore-and-aft direction under a low-deck and an air cleaner. The air cleaner is adapted to be capable of being maintained and inspected from the side of the vehicle. A filter element is provided in the air cleaner, and is attachable and detachable by a lid member on the side of the air cleaner. An inspection lid opposing the lid member is provided on a vehicle body cover covering the air cleaner. A space for arranging vehicle accessories such as a fuel tank is provided above the air cleaner.

Abstract: An intake manifold arrangement for an internal combustion engine in which transverse channels (12) are arranged between the intake channels upstream from the cylinder intakes of a multi-cylinder internal combustion engine equipped with exhaust gas recirculation. The connections (2, 3) for the introduction of clean air into the intake channels, the transverse channels (12) and a connecting flange (4) for the exhaust gas recirculation line are integrated into a one-piece component (1), preferably made of cast aluminum, which can be mounted on the respective cylinder intakes of the internal combustion engine, particularly a V engine.

Abstract: An outboard motor has a V-type engine in which in which a plurality of cylinders are arranged in a V-shape, a crankshaft is arranged substantially vertically, and an overhead valve (OHV)-type valve train is mounted. This outboard motor also includes an air intake system in which a carburetor is arranged above the engine and in a space of a V bank between the cylinders.

Abstract: Prior art air charge systems for ‘V’ configuration internal combustion engines use two turbochargers and two intercoolers, one for each bank of cylinders, and require relatively long and complex air ducts. The present invention provides a charge air system for a ‘V’ engine with two banks of cylinders. The system includes a compressor connected by a charge air conduit to a charge air cooler and a flow control valve in communication with first and second branch conduits, each adapted for connection to a bank of cylinders. A branch connector has one inlet in communication with the valve and two outlets in communication with the two branch conduits. The charge air conduit may be disposed in the ‘V’ between the two banks of cylinders. The system uses one compressor and one cooler, thereby reducing component and assembly costs for the engine and keeping air ducting relatively simple.

Abstract: An air fuel delivery system arrangement for an engine is provided, including an air manifold body, having a first set of runners for a first cylinder bank with inlets on a first side and outlets on a second side of the manifold body and a second set of runners for a second cylinder bank with inlets on a second side and outlets on a first side. And a first fuel rail is included, having outlets for connection with fuel injectors for delivering fuel to the first cylinder bank being positioned generally between the inlets of the manifold body. A second fuel rail is also included, having outlets for connection with fuel injectors for delivering fuel to the second cylinder bank being positioned generally between the inlets of the manifold body being generally vertically aligned with the first fuel rail.

Abstract: An intake device (1) for an internal combustion engine including a main body (2) and cover element (3; 20) which are securely connected to one another. Main body (2) and cover element (3) form intake pipes (4, 5, 6, 7) of in intake manifold. The cover element (3; 20) includes a plurality of individual shells (14, 15, 16, 17; 24, 25, 26, 27), which are connected to one another. Each individual shell (14, 15, 16, 17; 24, 25, 26, 27) forms a wall section of a respective intake pipe (4, 5, 6, 7) of the intake device (1). A flexible connection element (22) is arranged between two successively adjacent individual shells (25, 26) to compensate for tolerances between the cover element (3) and the main body (2).

Abstract: An intake manifold (10) for a multi-cylinder internal combustion engine includes a tubular intake distributor (12) from which a plurality of long intake tubes (13) extend and lead to the individual cylinders. Short intake tubes (14) likewise extend from the intake distributor and open into the respective associated long intake tubes (13). The intake distributor (12) and the long and short intake tubes (13, 14) are formed from a one-piece housing (11) which has a cavity (21) which intersects the short intake tubes (14). In this cavity (21) a control element (15) is installed, which includes flaps (16), flap frames (17), a shaft (19) and a control element frame (18). By moving the shaft (19) either rotationally or translationally, the short intake tubes (14) can be opened or closed. In contrast to arrangements known in the prior art, the control element (15) has no sealing elements which can catch or jam during assembly.

Abstract: An air intake especially for internal combustion engines with a V-shaped cylinder arrangement, which is composed of two units (16a, 16b). From the two units (16a, 16b) extend the intake ducts (19a, 19b), each associated with one cylinder bank (11) of the internal combustion engine. By dividing the air intake device into two units (16a, 16b), the unit (16a) can be mounted first on the internal combustion engine, a free space (20) for the mounting tool being necessary. Then the unit (16b) is placed and bolted on, the air intake ducts (19b) being able to run through the free space (20) in the hatched area (23), since the unit (16a) is already installed. The advantage of this air intake tube configuration is a substantially greater geometric freedom of design.

Abstract: An tuned induction system for use on a motorcycle having a V-twin engine. The tuned induction system having separate and individual first and second manifold bodies. Each of the separate intake manifold bodies having a flange that couples the individual manifold body to a cylinder head of the V-twin engine. The flange having a continuous radius that maximizes airflow velocity to enhance engine performance.

Abstract: A V-type engine having an intake system structure formed of a surge tank and intake pipes. The intake system structure is divided into upper and lower blocks by a horizontal dividing surface positioned below the surge tank. The upper block includes the surge tank, and first and second upper pipe parts of the intake pipes. The lower block includes first and second lower pipe parts of the intake pipes. First and second seal parts surround the intake passages on the dividing surface toward the upper block. First and second straight inner sealing surfaces are arranged at the portion where the seal parts extend inwardly of the engine banks. Only these straight inner sealing surfaces are positioned below the surge tank.

Abstract: A V-type 2-cylinder engine capable of distributing air-fuel mixtures equally to each cylinder, having a fuel injection device compact in its arrangement by making effective use of a V-space between the cylinders, and having an improved assembly performance and low manufacturing cost. In the V-type 2-cylinder engine having a V-space between two cylinders, there are arranged fuel injectors disposed in the cylinders, respectively, and a common fuel pressure adjustor for adjusting the pressures of fuels to be fed to the fuel injectors. An injection fuel introduction portion of a fuel passage is formed in a throttle body forming a section of intake passages and having throttle valves. The fuel pressure adjustor is disposed in the injection fuel introduction portion.

Abstract: An tuned induction system for use on a motorcycle having a V-twin engine. The tuned induction system having separate and individual first and second manifold bodies. Each of the separate intake manifold bodies having a flange that couples the individual manifold body to a cylinder head of the V-twin engine. The flange having a continuous radius that maximizes airflow velocity to enhance engine performance.

Abstract: An intake manifold is molded of two plastic parts. A first main manifold body provides the outer cover and an inner opening. A second runner provides a plurality of entry ports for communicating air to cylinders within the engine. In the past, it has been somewhat difficult to control the shape of the entry ports when the manifold was molded of a single part. The use of the separate runner allows the provision of a relatively thin and easily molded part such that the entry ports can be closely controlled and an idealized design can be achieved.

Abstract: An air induction arrangement 7 for a variable displacement engine is provided. The air induction arrangement 7 includes first and second plenums 22, 24 fluidly connected to respective first and second throttles 26, 28. The first and second throttles 26, 28 are connected to respective first and second inlets 44, 60. In partial operation, the air induction arrangement 7 induces air into the first plenum 22. In higher power demand operation, the air induction arrangement 7 additionally induces air through the second plenum 24. There is a reduction of the cancellation of acoustic output between the first and second inlets 44, 60 so that an acoustic output of the engine 14 operating with only a first group of cylinders 16 is similar to the acoustic output of the engine when the engine is operating with both groups of cylinders 16, 20.

Abstract: A V-type 2-cylinder engine capable of distributing air-fuel mixtures equally to each cylinder, having a fuel injection device compact in its arrangement by making effective use of a V-space between the cylinders, and having an improved assembly performance and low manufacturing cost. In the V-type 2-cylinder engine having a V-space between two cylinders, there are arranged fuel injectors disposed in the cylinders, respectively, and a common fuel pressure adjustor for adjusting the pressures of fuels to be fed to the fuel injectors. An injection fuel introduction portion of a fuel passage is formed in a throttle body forming a section of intake passages and having throttle valves. The fuel pressure adjustor is disposed in the injection fuel introduction portion.

Abstract: An improved compact and highly efficient variable tuned intake system for a V-type, multi-cylinder engine. The induction system provides variable tuning length with both the high speed and low speed inlets being directed away from the valley between the cylinder banks to minimize the change in the flow directions into the combustion chambers.

Abstract: A sectional intake manifold includes a flanged first intake manifold section having and a flanged second intake manifold section. Bolts extend through unthreaded bores in the first intake manifold section flange into threaded bores in the second intake manifold section flange to secure the first intake manifold section to the second intake manifold section. A seal is provided between the first section mating flange and the second section mating flange. A method is also provided for converting a conventional intake manifold to a sectional intake manifold according to the present invention.

Abstract: The object of this invention is that a suction device for an internal combustion engine is to be compact. The suction device comprising a casing having an air inlet and a plurality of outlets, a filter in the casing for filtering air from said air inlet, a collection chamber in the casing for receiving air from the filter, at least one throttle valve in the casing for controlling the flow of air from said filter to said collection chamber, and a plurality of suction pipes. According to the present invention, the suction device can be made compact to thereby effectively use an engine room of an automobile.

Abstract: An engine includes an improved sensor arrangement that can decrease the possibility of damage to sensors relating to fuel injection control. The engine includes a cylinder block defining first and second banks of cylinder bores extending separately from each other. Pistons reciprocate within the respective cylinder bores. Cylinder head members are arranged to close respective ends of the first and second banks of the cylinder bores. The cylinder head members define combustion chambers together with the cylinder bores and the pistons. An air induction system is arranged to introduce air to the combustion chambers. The induction system includes first and second intake units with the first intake unit allotted to the first cylinder bank and with the second intake unit allotted to the second cylinder bank. The first and second intake units define first and second intake passages, respectively, through which the air flows. Fuel injectors are arranged to spray fuel for combustion in the combustion chambers.

Abstract: An overhead camshaft V-2 engine includes a single power transmitting mechanism disposed on one side of a crankcase for transmitting rotational power from a crankshaft to respective camshafts of drive valve mechanisms. The power transmitting mechanism has a driving member mounted to only one end portion of the crankshaft. The thus arranged power transmitting mechanism enables downsizing of the engine. Two intake ports are formed in respective cylinder heads of two cylinder blocks and open at one end to respective first surfaces of the cylinder heads facing in a first direction, and two exhaust ports are formed in the respective cylinder heads of the cylinder blocks and open at one end to respective second surfaces of the cylinder heads facing in a second direction opposite to the first direction. With this arrangement of the intake and exhaust ports, intake pipes can be arranged with a high degree of freedom.

Abstract: An engine includes an improved induction system which reduces the girth of the engine, simplifies assembly, and improves better power output balance between the cylinders of the engine. The illustrated engine is a multi-cylinder engine and is designed to power an outboard motor; hence, the cylinders of the engine are arranged above one another. Thus, the engine comprises at least first and second combustion chambers. The induction system selectively communicates with the combustion chambers to supply a fuel/air charge thereto. The induction system includes a first intake passage leading to the first combustion chamber and having a first fuel injector communicating therewith, and a second intake passage leading to the second combustion chamber and having a second fuel injector communicating therewith.

Abstract: An improved compact and highly efficient variable tuned intake system for a V-type, multi-cylinder engine. The induction system provides variable tuning length with both the high speed and low speed inlets being directed away from the valley between the cylinder banks to minimize the change in the flow directions into the combustion chambers.