Abstract: A portable flexible fuel generator, having an engine, includes: a cylinder and a spark plug in the cylinder, a primary fuel tank fluidly connected to the cylinder, an air intake path fluidly connecting atmosphere to the cylinder, a start module including a starting fuel tank holder and a starting fuel line, where the starting fuel line is fluidly connected to the air intake path, a coolant path which provide a flow path for coolant to cool the cylinder, and a thermal controller along the coolant path. Furthermore, the engine has full cylinder cooling.

Abstract: An engine provided with a turbocharger includes a timing chain, a chain case mounted to one end in an axial direction of a crankshaft disposed in the so as to cover the timing chain to define a chain chamber, a turbocharger disposed on one side in a width direction of the engine and driven by an exhaust gas and including a bearing portion, and a lubricating device for lubricating oil within the engine. The lubricating device includes an oil pan disposed below the engine, and an oil drain passage through which the oil lubricating the bearing portion returns to the oil pan. The oil drain passage has an oil drain port which is opened to the chain chamber defined by the one end portion of the axial direction of the crankshaft in the engine and the chain case.

Abstract: Supply of supplementary fuel is controlled by activation of a valve in response to certain engine operating conditions or parameters. For example, the supplementary fuel may be supplied to facilitate starting and warming up a cold engine, or to cool and/or slow down an engine operating above a threshold speed.

Abstract: A compact multiple throttle device where multiple throttle shafts are driven by a single drive force. A throttle device includes a first throttle shaft to which a first throttle body and a third throttle body are fixed and also includes a second throttle shaft to which a second throttle body and a fourth throttle body are fixed. The first throttle shaft and the second throttle shaft are parallel to each other. The third throttle body and the fourth throttle body are integrally coupled to each other in a gear case. In the inside of the gear case, a motor for driving the first throttle shaft and the second throttle shaft is arranged. Further, first to sixth gears for transmitting drive force of the motor to the first throttle shaft and the second throttle shaft are included.

Abstract: In line carburetor (104) is mounted to a manifold (140) over the engine (800). The barrels of the carburetor deliver air/fuel suspensions to concentrated positions (152) of the manifold, with the concentrated positions being at opposite ends of the engine. The ports leading from the manifold to the runners are equally positioned about the concentrated positions (152) so that the runners are of substantially equal length and resistance, thereby providing more uniform delivery of the air/fuel suspension to the cylinders.

Abstract: A throttle assembly for intake air protects a link mechanism for interlocking throttles with each other from water and mud and maintains the throttle operability in a satisfactory state. The throttle assembly for intake air includes a plurality of throttle devices for injecting fuel into intake air to generate an air-fuel mixture; a link mechanism for connecting driving portions of the throttle devices with each other, a link mechanism housing chamber defined by an outer wall member for forming a link mechanism housing chamber and housing the link mechanism, and seal members provided at the connected or mated portions of the outer wall member and a different member or the connected or mated portions of a plurality of outer wall configuring members which configure the outer wall member.

Abstract: A speed control system is for a vehicle having an engine including a carburetor with a throttle plate moveable between a minimum open position and a maximum open position. The speed control system includes a ground speed limiter mechanism operatively coupled with the throttle plate and configured to displace the plate toward the minimum position as ground speed of the vehicle approaches a predetermined maximum value. An engine speed limiter mechanism is operatively coupled with the throttle plate and is configured to displace the plate toward the minimum position as a speed of the engine approaches a predetermined maximum value. Preferably, a control linkage is connected with the throttle plate and is moveable between a first configuration, at which the throttle plate is disposed at the minimum position, and a second configuration at which the throttle plate is disposed at the maximum position, the two limiter mechanisms displacing the linkage.

Abstract: An internal combustion engine incorporating rest cylinders is provided which does not need a high response performance when operating a throttle valve and which can eliminate engine output variations as the number of operable cylinders changes. In the internal combustion engine, some of a plurality of cylinders is configured to rest during normal operation of the engine. The cylinders are divided into a plurality of cylinder groups, and each of the cylinders is provided with an independent throttle valve. An ECU for increasing the number of operative cylinder groups according to at least the throttle handgrip opening is provided. Also provided are motors for bringing the throttle valves in the cylinder in the rest state into a fully closed state on the basis of each cylinder group, a throttle valve position sensor, and the like.

Abstract: To improve productivity of a connection member between first and second carburetors, and to reduce maintenance work area for a main drive throttle valve lever, a driven throttle valve lever and a connection lever, a main drive throttle valve lever is arranged to protrude in one side of a first carburetor, a driven throttle valve lever is arranged to protrude in one side of a second carburetor, the main drive throttle valve lever and the driven throttle valve lever are connected in one side by a connection lever. A cup member provided with a bottom portion and a peripheral wall portion and formed in a cup shape is arranged fixedly in one side of the first and second carburetors, the first and second carburetors are connected by the cup member, an opening portion of the cup member is closed by a cover member, and the main drive throttle valve lever, the driven throttle valve lever and the connection lever are arranged so as to be received inside the cup member closed by the cover member.

Abstract: To improve productivity of a connection member between first and second carburetors, and to reduce maintenance work area for a main drive throttle valve lever, a driven throttle valve lever and a connection lever, a main drive throttle valve lever is arranged to protrude in one side of a first carburetor, a driven throttle valve lever is arranged to protrude in one side of a second carburetor, the main drive throttle valve lever and the driven throttle valve lever are connected in one side by a connection lever. A cup member provided with a bottom portion and a peripheral wall portion and formed in a cup shape is arranged fixedly in one side of the first and second carburetors, the first and second carburetors are connected by the cup member, an opening portion of the cup member is closed by a cover member, and the main drive throttle valve lever, the driven throttle valve lever and the connection lever are arranged so as to be received inside the cup member closed by the cover member.

Abstract: An apparatus (1) for mixing air and fuel in an internal combustion engine comprises at least two throttle bodies (2a, 2b) having an inlet and an outlet and at least two air chokes (8), each located at the inlet of one of the throttle bodies (2a, 2b) and coaxial with the throttle body (2a, 2b). Each air choke (8) has a portion (9) that is fixed and a portion (10) that moves coaxially relative to the fixed portion (9) between a first position in which the air choke (8) presents a first height (L1) and a second position in which the air choke (8) presents a second height (L2) that is greater than the first height (L1). The apparatus (1) further comprises at least two independent actuators (13) each moving one of the mobile portions (10) between the first and second positions, and at least two fuel injectors (11) located above the air chokes (8).

Abstract: An apparatus (1) for mixing air and fuel in an internal combustion engine comprises at least two throttle bodies (2a, 2b) having an inlet and an outlet and at least two air chokes (8), each located at the inlet of one of the throttle bodies (2a, 2b) and coaxial with the throttle body (2a, 2b). Each air choke (8) has a portion (9) that is fixed and a portion (10) that moves coaxially relative to the fixed portion (9) between a first position in which the air choke (8) presents a first height (L1) and a second position in which the air choke (8) presents a second height (L2) that is greater than the first height (L1). The apparatus (1) further comprises at least two independent actuators (13) each moving one of the mobile portions (10) between the first and second positions, and at least two fuel injectors (11) located above the air chokes (8).

Abstract: A throttle linkage for an internal combustion engine includes a lever assembly that is configured to connect an operator-manipulated input element to an output element that controls at least a throttle of the engine. At least one stop pin is mounted on the lever assembly and is configured to engage a stationary seat when the lever assembly is in one of a full-open position and an idle position. The stop pin is axially locked with respect to the lever assembly so as to be axially nonadjustable relative to it. If the stop pin is screwed into the lever assembly, a head of the stop pin preferably faces the associated stationary seat so as to be relatively inaccessible after the throttle linkage is mounted on the engine. The head may also be covered by a cap to further hinder tampering with the stop pin. As a result of this arrangement, the operating stroke of the lever assembly is preset upon initial assembly of the lever assembly and cannot be adjusted.

Abstract: An engine for a small watercraft, having an exhaust system that extends from an engine body and then generally surrounds the engine body. An air chamber of an air induction system for the engine, which has a relatively large volume, is located under the exhaust system. An exhaust manifold of the exhaust system has a slant opening, from which the other components of the exhaust system extends. A single, rigid coolant delivery conduit is affixed to the exhaust manifold so that a coolant jacket therein can be supplied with coolant through the delivery conduit. A plurality of carburetors each having a throttle valve are provided for the engine. A control mechanism for controlling an opening of the throttle valves is positioned at one side of the carburetors, while an interlocking mechanism for activating the throttle valves synthetically is positioned at another side of the carburetors.

Abstract: An outboard motor with an engine having a crankcase in which a crankshaft is perpendicularly arranged in a state that the outboard motor is mounted to a hull. The outboard motor is provided with a fuel supply apparatus that includes an interlocking mount member to be mounted to the engine, a plurality of air-fuel mixture supply devices mounted to the interlocking mount member, an intake noise silencer mounted to the air-fuel supply means, an engine starting operation assisting device for assisting smooth starting of an engine operation, and a speed reduction control device for preventing engine stall. The starting operation assisting device and the speed reduction control device are mounted to the interlocking mount member as one unit.

Abstract: A small-sized boat of the present invention includes a plurality of diaphragm type carburetors corresponding to each cylinder of a multicylinder engine. A crankshaft axis extends along a line extending through a bow and a stern of a hull. The carburetors include a plurality of shafts for throttle valves extending vertically in correspondence thereto, one throttle link connected to upper parts of the shafts for the throttle valves, and a plurality of diaphragm mechanisms having operating surfaces perpendicular to the crankshaft axis. By linking a plurality of the carburetors together to form an assembly of the carburetors, an overall size of carburetors is made small. Therefore, each carburetor can be mounted in a small engine room in correspondence to each cylinder of the engine.

Abstract: To provide a mechanism for coordinating the operation of throttle valves in a carburetor system in which a plurality of carburetors are connected in series and are then arranged in parallel with one another so as to position shafts thereof in parallel with one another. The throttle valves are rotated on said shafts to open or close passages of the carburetors. In the throttle valve operation coordinating mechanism, each of the carburetors connected in series shares one shaft which is received in bearings positioned at opposite ends thereof. A link extends between the shafts of the carburetors arranged in parallel and coordinates the operation of the shafts.

Abstract: An intake control mechanism for controlling the flow of air through an air intake of an engine is disclosed. The air intake comprises an intake member defining an intake passage corresponding to each combustion chamber of the engine. A throttle valve and a choke valve are movable positioned in each passage. The intake control mechanism includes a choke control and throttle control for moving the choke and throttle valves, respectfully. The choke control includes a choke linkage and the throttle control includes a throttle linkage, the linkages positioned outside of the intake member and between the choke and throttle valves. Preferably, the choke linkage is positioned between the throttle linkage and the intake member.

Abstract: A throttle valve synchronization mechanism for a marine engine includes a throttle linkage which improves synchronization of throttle valve operation, while minimizing the opening degree of the throttle valves when moved to a closed position. The throttle linkage includes a linkage rod which carries a plurality of lugs. The lugs extends between the linkage rod and corresponding throttle levers of the throttle valves. The lugs are rotatably connected to the throttle levers and are rigidly fixed to the linkage rod. In one embodiment, the linkage rod lies in front of the throttle levers, and in another embodiment, the linkage rod lies to the side of the throttle levers.

Abstract: A mounting arrangement for an accelerator pump and a choke actuation mechanism, which are used in conjunction with a plurality of charge formers, minimizes the girth of the engine while making these components more accessible and easing assembly. An actuator and a choke solenoid of the choke actuation system are mounted proximate to one another and partially between adjacent induction pipes of an induction system. This position allows these components to be located on an exterior side of the induction system without interfering with the protective cowling of the motor. The accelerator pump is mounted at the end of a series of charge formers, proximate to a throttle linkage which controls throttling devices of the charge formers. This position of the accelerator pump eases the installation of this component without increasing the girth of the engine.

Abstract: A mounting arrangement for an accelerator pump and a choke actuation mechanism, which are used in conjunction with a plurality of charge formers, minimizes the girth of the engine while making these components more accessible and easing assembly. An actuator and a choke solenoid of the choke actuation system are mounted proximate to one another and partially between adjacent induction pipes of an induction system. This position allows these components to be located on an exterior side of the induction system without interfering with the protective cowling of the motor. The accelerator pump is mounted at the end of a series of charge formers, proximate to a throttle linkage which controls throttling devices of the charge formers. This position of the accelerator pump eases the installation of this component without increasing the girth of the engine.

Abstract: A linkage system interconnects a plurality of throttle shafts, while minimizing the effects of thermal expansion in the linkage on the throttle shafts. The linkage includes a plurality of linkage rods which interconnect a plurality of throttle levers attached to the throttle shafts. At least a first and a second linkage rod are connected to a first lever in a manner in which thermal expansion of the first linkage rod applies a force to the first lever which is equal but opposite to a force applied to the first lever due to thermal expansion of the second linkage rod.

Abstract: A fuel injection and control system for a V-type, two cycle, crankcase compression, internal combustion engine. The fuel injection system includes fuel injectors positioned in the valley of the engine and which are supplied with fuel under pressure from a fuel tank through a line in which a fuel filter and fuel pump are positioned. The fuel pump and fuel filter are disposed at one end of the engine and the amount of pressure supplied to the fuel injectors is controlled by a pressure regulator that regulates pressure by bypassing excess fuel back to the fuel filter upstream of the filter element. A throttle control and throttle position sensor are disposed at the opposite end of the engine and exhaust control valves are provided outside of the valley of the "V" of the engine.

Abstract: A throttle valve synchronizing arrangement for the induction system of a V type engine wherein the throttle valves associated with each cylinder bank rotate in common vertical planes but wherein these planes are not parallel or collinear with each other and wherein the throttle valve shafts are staggered. The throttle valve of each bank are synchronized with each other by a linkage system and the banks are synchronized with respect to each other by connection to an intermediate shaft that is disposed at a greater angle to the shafts of the throttle valves of the banks than the angle between the throttle valves of the banks.

Abstract: A synchronizing mechanism for synchronizing a plurality of throttle valves that employs a single coupling member that couples slave butterfly valves to a directly operated butterfly valve for synchronizing all of the butterfly valves simultaneously.

Abstract: A throttle valve synchronizing mechanism for a plurality of throttle valves interconnected by a linkage system. The synchronizing system includes a pair of pivotally supported levers one of which is fixed for rotation with one of the throttle valve shafts and the other of which is connected to the linkage system. A locking screw arrangement holds the levers in adjusted positions and the locking screw rotates about an axis that is non-parallel to the axes of the levers.

Abstract: An actuating arrangement connected with throttle valves of suction pipes of an internal combustion engine which are to be actuated synchronously. The throttle valves include bearing shafts and cooperate by way of levers with a linkage of the actuating arrangement. For the compensation of tolerances of the actuating arrangement, especially angular tolerances of the throttle valves, yielding members are provided between the linkage and the bearing shafts, and a device stresses the throttle valves into the closed end positions.

Abstract: An internal combustion engine comprising a crankcase adapted to rotatably support a crankshaft having an axis, the crankcase defining a plurality of crankcase chambers and including a generally flat manifold mounting surface including therein a first series of inlet openings aligned in the direction of the crankshaft axis, and a second series of inlet openings aligned in the direction of the crankshaft axis, the first and second series being laterally offset with respect to the direction of the crankshaft axis, and each of the inlet openings of the first and second series being respectively adapted to feed air to one of the crankcase chambers and having a minor dimension parallel to the crankshaft axis, a major dimension transverse to the crankshaft axis, and a portion overlapping the inlet openings of the other of the first and second series.

Abstract: A throttle linkage assembly comprising a throttle shaft rotatable about a throttle shaft axis between an idle position and a wide open throttle position, a throttle plate fixed on the throttle shaft, a driven lever pivotable about the throttle shaft axis between various angles relative to the throttle plate, an adjustment lever assembly for fixing the driven lever at a selected angle relative to the throttle plate, and a timing plate operable on the driven lever for rotating the throttle shaft from the idle position to the wide open throttle position.

Abstract: A fuel supply assembly including carburetors with separate throttle shafts in general axially alignment, and a U-shaped coupling for flexibly connecting the carburetor throttle shafts. The coupling includes a bight connected to a pair of legs each having a free end including a U-shaped member having a pair of arms with apertures for receiving one of the carburetor throttle shafts, each of the U-shaped members also including an arcuate bight having arcuate side portions separated by a centrally located slot communicating with the arm apertures, and also including a nut and bolt arrangement extending through the U-shaped member transverse to the throttle shaft for squeezing the arcuate side portions to reduce the opening size of the slot and arm apertures, whereby the pair of arms in each of the U-shaped members engages a separate one of the carburetor throttle shafts so that the pair of carburetor throttle shafts are flexibly coupled for common rotation.

Abstract: Several embodiments of improved compact motorcycle configurations. In each embodiment, a single suspension element is provided for the rear wheel that extends generally in the longitudinal center plane of the motorcycle. In accordance with each embodiment, plural intake passages serve each chamber of the engine to permit the use of a smaller more compact induction system. Separate carburetor barrels serve each intake passage. In one embodiment, the intake passages communicate with the chamber through separate intake ports and in another embodiment, the intake passages serve the chamber through a common intake port.

Abstract: An induction system for a multi-cylinder internal combustion engine that improves fuel efficiency and reduces the emission of unwanted exhaust gas constituents, particularly at the low and medium load conditions. The engine induction system comprises a plurality of separate carburetor barrels which, at least under some running conditions, serve cylinders separately from each other through main induction passages. One carburetor barrel is provided with a different fuel discharge system than the other carburetor barrels for accomodating a certain engine operating condition. A separate sub-intake system connects this carburetor barrel with other cylinders not normally served by the particular carburetor barrel in question. This sub-intake system has a substantially smaller cross-sectional area in the main intake system so that the charge drawn into the cylinders through the sub-intake system enters at a substantially higher velocity.

Abstract: An induction system for a multi-cylinder internal combustion engine that improves fuel efficiency and reduces the emission of unwanted exhaust gas constituents, particularly at the low and medium load conditions. The engine induction system comprises a plurality of separate carburetor barrels which, at least under some running conditions, serve cylinders separately from each other through main induction passages. One carburetor barrel is provided with a different fuel discharge system than the other carburetor barrels for accomodating a certain engine operating condition. A separate sub-intake system connects this carburetor barrel with other cylinders not normally served by the particular carburetor barrel in question. This sub-intake system has a substantially smaller cross-sectional area in the main intake system so that the charge drawn into the cylinders through the sub-intake system enters at a substantially higher velocity.