Abstract: A intake manifold or splitter for an internal combustion engine and a process for production of same wherein a functional unit, comprised of a shaft with valves attached thereto, is assembled with bearing parts comprising clothespin-like clamps that clamp onto the shaft to form a sub-assembly which is mounted as a unit into receiving housing of the manifold or splitter, wherein a molding or over-molding at is provided at a level of the contact surface of a connection plate to lock the assembly of valves, shaft and bearings into the receiving housings and form sealing formations that seal against gases between the intake manifold or splitter and the internal combustion engine.

Abstract: In a situation where a conventional inductive throttle sensor is used with a motor-driven throttle valve device to detect the rotation angle of a throttle shaft, plural sensor connection conductor sections for connecting a connector terminal to a circuit board terminal section are formed on the cover on one lateral surface side of a circuit board in the long-axis direction. This increases the dimension of the cover in the short-axis direction (the dimension in the direction of air flow in an intake path). Consequently, it is difficult to install the motor-driven throttle valve device and inductive throttle sensor in a narrow engine room. This problem is addressed by using a separate member to achieve electrical conduction between a stator circuit board and a conductor routed inside the cover installed over the stator circuit board in a concentrated manner on one side of the circuit board.

Abstract: An embodiment of an engine is described. The engine includes a first throttle valve. The first throttle valve is provided in a first intake passage coupled to an intake manifold. The first throttle valve has a default closed position. The engine further includes a second throttle valve. The second throttle valve is provided in a second intake passage coupled to the intake manifold. The second throttle valve has a default open position. The engine further includes a venturi pump that is provided between the second throttle valve and the intake manifold. When the second throttle valve is in the default open position, intake air flows through the venturi pump.

Abstract: A throttle control device includes a throttle body having at least three air-intake passages aligned in line as being opened and closed respectively by a throttle valve, plural motors including a first motor which commonly operates the throttle valves placed at bilateral end sides among the throttle valves aligned in line and a second motor which operates a throttle valve placed at the inner side between the throttle valves at the bilateral end sides, and a transmitting portion which transmits operational force of the first motor to a first throttle shaft fixed to one throttle valve of the throttle valves at the bilateral end sides and to a second throttle shaft fixed to the other throttle valve thereof so as to rotate the first throttle shaft and the second throttle shaft in synchronization with each other.

Abstract: A throttle cable locking assembly (16) for a power tool (1), in which the power tool (1) includes a source of power (2) having an internal combustion engine, a machine implement (4) engaged to the source of power (2), and a throttle handle (6) connected to the internal combustion engine for regulating power supply to the machine implement (4). The throttle cable locking assembly (16) includes: a cable assembly (18), the cable assembly (18) including a throttle cable (20) extending from the internal combustion engine, an outer cable (30) extending from the internal combustion engine and enclosing a portion of the throttle cable (20), and an engagement member (36) carried by a first end portion of the outer cable (30); and an adjuster bolt capable of being engaged with the engagement member (36) provided on the first end of the outer cable (30). A locking case (48) is provided for securing one end of the adjuster bolt and a portion of the engagement member (36).

Abstract: In a situation where a conventional inductive throttle sensor is used with a motor-driven throttle valve device to detect the rotation angle of a throttle shaft, plural sensor connection conductor sections for connecting a connector terminal to a circuit board terminal section are formed on the cover on one lateral surface side of a circuit board in the long-axis direction. This increases the dimension of the cover in the short-axis direction (the dimension in the direction of air flow in an intake path). Consequently, it is difficult to install the motor-driven throttle valve device and inductive throttle sensor in a narrow engine room. This problem is addressed by using a separate member to achieve electrical conduction between a stator circuit board and a conductor routed inside the cover installed over the stator circuit board in a concentrated manner on one side of the circuit board.

Abstract: Throttle body assemblies having improved throttle position sensing assemblies and a method of integrating a throttle position sensor assembly with a throttle body assembly are described. The method comprises the steps of: i) press-fitting a sensor element onto a shaft of a throttle plate of a throttle body assembly; ii) engaging one or more inwardly extending members of the sensor element with one or more recessed portions formed on the shaft of the throttle plate; and iii) disposing an inductive rotary position sensor proximate the sensor element, wherein the press-fit engagement and one or more inwardly extending members limit axial and rotational movement of the sensor element with respect to the throttle plate, and wherein the inductive rotary position sensor detects a relative position of the sensor element for the purpose of ascertaining a position of the throttle plate.

Abstract: An intake air flow control valve comprises a metal shaft having a noncircular cross sectional shape; and a valve element fixed to the metal shaft and arranged to close and open a cross section of the intake passage with rotation of the metal shaft. The valve element is an integral unit including a resin part of resin material and a metal part of metallic material. The resin part includes an intermediate portion formed with a shaft receiving groove in which the noncircular metal shaft is fit. The metal part extends along the shaft receiving groove, and includes a wide section to regulate fluid flow.

Abstract: An engine system includes a throttle valve configured to variably open and close to selectively restrict a volume of air flow. The engine system also includes a supercharger comprising an air inlet, an air outlet, a rotatable drive shaft and rotors associated with the drive shaft, wherein the supercharger is sized to have a flow rate that substantially prevents backwards leaking of air flow. The engine system further includes a combustion engine comprising combustion chambers and an associated rotatable crank shaft and a continuously variable transmission (CVT) configured to variably transfer rotational energy between the drive shaft and the crank shaft.

Abstract: An throttle body for rotating a valve shaft of an air-intake throttle valve through a decelerating mechanism by a motor and change the opening area of an air-intake passage by rotating the valve shaft is equipped with a lever portion that is disposed so as to be interlocked with the decelerating mechanism and regulates the opening degree of the air-intake throttle valve under the full-open state, and an adjusting screw that is threadably inserted from the outside of the body portion and abuts against the lever portion in the body portion to change the opening degree of the air-intake throttle valve under the full-open state.

Abstract: At least one set of locator pins is provided on the flange of an intake manifold which couple with an orifice provided on the flange of a throttle body to align the two parts to ensure that they are properly oriented when assembled. In addition, through holes are provided on the throttle body flange and threaded inserts are provided on the flange of the intake manifold. The locator pins are coupled with the orifices prior to inserting a bolt through the through holes to engage with the threads of the threaded insert. By providing the locator pins, the two flanges are held in a desired orientation so that the ducts of the two flanges are properly aligned to substantially eliminate a step or mismatch at the interface.

Abstract: An impact absorber is arranged between a first rotation member and a second rotation member that are coaxially arranged to rotate in a circumference direction around a rotation axis. The first rotation member has a recess continuously extending in a direction inclined to the rotation axis from a first end to a second end, and a lock part extending in the circumference direction from the second end of the recess. The second rotation member has a projection configured to be engaged with the recess continuously from the first end of the recess to the second end of the recess. The projection of the second rotation member is locked with the lock part of the first rotation member when the projection moves to the lock part from the second end of the recess.

Abstract: An intake system mounted to a vehicle controls an opening angle of a variable flap according to an RPM of an engine, an intake pressure, and an opening angle of a variable flap to optimize performance in various operation regions by detecting engine RPM and an intake air pressure, and determining an operation region based on the RPM of the engine; applying the intake pressure to determine a target amount of air and an opening angle of a variable flap for an operation region; driving an actuator to adjust an opening angle of the variable flap to a target opening angle; and analyzing an operation position of the actuator to detect an opening angle of the variable flap, and, when the target opening angle is not followed, correcting a drive of the actuator such that an opening angle of the variable flap follows the target opening angle.

Abstract: An integrated throttle body for an electronic fuel injection (“EFI”) system and its method of manufacture. The integrated throttle body of the invention comprises a molded throttle body housing in which the throttle valve, shaft, bore and motor housing are all molded in a single shot from a suitable thermosetting resin or thixomolded from magnesium.

Abstract: An internal combustion engine that includes a carburetor having a choke valve and an actuator configured to move the choke valve between a closed choke position and an open choke position. A passageway is configured to direct a pressure pulse from the engine into a fuel chamber of the carburetor. The engine further includes a priming valve at least partially located within the passageway. The priming valve is configured to move between an open primer position that allows the pressure pulse to enter the fuel chamber through the passageway and a closed primer position that substantially restricts the pressure pulse from entering the fuel chamber through the passageway. The priming valve is configured to move between the open primer position and the closed primer position by the actuator when the actuator moves the choke valve between the closed choke position and the open choke position, respectively.

Abstract: A control structure is provided for a throttle valve of engine. The throttle valve includes a throttle plate arranged inside the valve body and mounted to a control shaft having an end extending outside the valve body and received in a control seat mounted outside the valve body and having a shaft hole seat, a constraint block, a coupling hole seat, and a cable outlet section. A control assembly includes a return spring and a control rocker arm that includes a connection section forming a connection hole to be fit over the control shaft and a cable connection section, a positioning section, and a push section. The control motor is mounted to the coupling hole seat of the control seat and has a driving rod having a front tip section positioned against the push section of the control rocker arm. The control seat lid is secured to the control seat.

Abstract: An air intake apparatus for an internal combustion engine includes an intake manifold adapted for being connected to an engine head, the intake manifold including therein an intake passage through which a stream of fuel-air mixture passes and a receiving portion formed at an inner circumferential surface of the intake passage, the receiving portion being at a downstream side of stream of fuel-air mixture; a valve open/close mechanism including a cartridge made of resin, an open/close valve accommodated in the cartridge, and a shaft for rotating the open/close valve, the cartridge defining a first clearance with the receiving portion and defining a second clearance with the engine head; and a first elastic member arranged between the engine head and the cartridge of the valve opening/closing mechanism for elastically retaining the cartridge in an upstream direction of the stream of fuel-air mixture.

Abstract: A variable intake system for a vehicle which controls air flow amount flowing into each combustion chamber according to rotation speed of an engine may include an air cleaner main body connected with a main duct and an auxiliary duct through which air flows, a valve housing which may be disposed within the air cleaner main body and communicated with the auxiliary duct, a valve assembly disposed to the valve housing and controlling an opening amount of the valve housing, an actuator mounted to the valve housing and coupled to the valve assembly to operate the valve assembly, and a controller controlling operation of the actuator, wherein the actuator may be a linear motor including a motor shaft which realizes linear motion according to supplying current to a coil of the actuator.

Abstract: In a situation where a conventional inductive throttle sensor is used with a motor-driven throttle valve device to detect the rotation angle of a throttle shaft, plural sensor connection conductor sections for connecting a connector terminal to a circuit board terminal section are formed on the cover on one lateral surface side of a circuit board in the long-axis direction. This increases the dimension of the cover in the short-axis direction (the dimension in the direction of air flow in an intake path). Consequently, it is difficult to install the motor-driven throttle valve device and inductive throttle sensor in a narrow engine room. This problem is addressed by using a separate member to achieve electrical conduction between a stator circuit board and a conductor routed inside the cover installed over the stator circuit board in a concentrated manner on one side of the circuit board.

Abstract: A throttle valve for controlling a fluid flow includes a throttle housing (4), a gas passage (18) in the throttle housing (4), a throttle shaft (8) which is pivotably supported in the throttle housing (4), and a throttle (6) which is connected to the throttle shaft (8). The throttle shaft (8) extends through a jacket (12) which is provided on the throttle (6) and at least partially encompasses the throttle shaft (8). After the throttle (6) is installed on the throttle shaft (8), a hardening filler material (10) creates a form-fit connection between the throttle (6) and the throttle shaft (8).

Abstract: An accelerator device capable of achieving miniaturization and easily varying torque characteristics with a simple structure. The accelerator device includes a housing, a grip-side rotary body which is rotated with accelerator operation, a friction member including a contact portion to apply resistance due to friction as being contacted to the grip-side rotary body, an urging member which is connected to the housing via the friction member and connected to the grip-side rotary body and which urges the grip-side rotary body to rotate to an initial position side, and a restriction portion which is arranged at the housing and which restricts rotation of the friction member with the urging force of the urging member as being contacted to the friction member. Here, the friction member is urged by the urging member in a direction that the contact portion is pressed to an outer circumferential face of the rotary body having the restriction portion as a fulcrum.

Abstract: A throttle body assembly, and method of manufacturing such, is disclosed having a unitary shaft and blade component injection molded in situ within a throttle body housing to mechanically entrap the shaft and blade component, yet still allowing for it to partially rotate, within the throttle body housing. The throttle body housing defines an interior passage, a shaft through-hole, and a shaft socket opposite the shaft through-hole, both aligned along a transverse axis to the interior passage. The shaft and blade component is a single unitary piece injection molded in situ within the throttle body housing, such that it has a blade section disposed within the interior passage, first and second shaft sections extending from the blade section opposite each other partially disposed within the shaft socket and shaft through-hole, respectively, and a pivotable axis generally coaxial with the transverse axis.

Abstract: An intake port is configured such that a center position of an intake upstream side opening is offset to one side in a juxtaposition direction of intake downstream side openings with respect to a center position between the intake downstream side openings in the juxtaposition direction as viewed in plan of a cylinder head. An injector is configured such that a fuel injection center axial line is inclined to the other side in the juxtaposition direction with respect to a center axial line of the intake upstream side opening as viewed in plan of the cylinder head.

Abstract: A throttle control module for controlling a throttle, comprises: a BLDC motor; a gear train connecting the motor to the throttle; and a throttle position sensor. A PWM module is connected to the throttle position sensor and generates a pulse-width modulation sequence according to the signal from the throttle position sensor and a desired throttle position signal. A decoder module generates commutation logic for the motor based on the signal from the throttle position sensor. A motor controller controls commutation of the motor according to the pulse-width modulation sequence and the commutation logic.

Abstract: An intake system is provided with an intake flow control valve (300) provided in an intake port (50) upstream of an intake valve (70). The intake flow control valve (300) may be switched between at least a first position (300A) and a second position (300B), in accordance with the operating state of an engine, by rotating a rotary shaft (360), which is supported by a rotary shaft support part (350). In the first position, the clearance between the valve element and the inner wall of the intake port is small. In the second position, the clearance between the valve element and the inner wall of the intake port is large.

Abstract: A load adjustment device for an actuator that determines the power of an internal combustion engine, designed as a throttle valve and is disposed on an actuator shaft in a housing, the actuator shaft being pivotally drivable about the rotary axis of the actuator shaft between a minimal load setting defined by a minimal load stop and a full load setting defined by a full load stop by means of a reversibly drivable actuating drive via an actuating part rotationally fixed to said shaft. The actuator shaft is subject to a load in the minimum load direction by a restoring spring. The actuating part can be subjected to a load by a leg of a torsion spring disposed radially outside the pivoting range of the part, the leg of the torsion spring extending into the pivoting range of the actuating part.

Abstract: In a situation where a conventional inductive throttle sensor is used with a motor-driven throttle valve device to detect the rotation angle of a throttle shaft, plural sensor connection conductor sections for connecting a connector terminal to a circuit board terminal section are formed on the cover on one lateral surface side of a circuit board in the long-axis direction. This increases the dimension of the cover in the short-axis direction (the dimension in the direction of air flow in an intake path). Consequently, it is difficult to install the motor-driven throttle valve device and inductive throttle sensor in a narrow engine room. This problem is addressed by using a separate member to achieve electrical conduction between a stator circuit board and a conductor routed inside the cover installed over the stator circuit board in a concentrated manner on one side of the circuit board.

Abstract: An air intake device for an engine is provided that includes a throttle body (1), a throttle valve (5) that has a valve shaft (5a) rotatably supported on the throttle body (1), a throttle drum (8) connected to one end of the throttle valve (5), a throttle sensor (51) connected to the other end of the valve shaft (5a), a bypass (20) bypassing the throttle valve (5), and a bypass valve (25) that opens and closes the bypass (20), a bearing boss (3) supporting one end part, on the throttle drum (8) side, of the valve shaft (5a) being integrally and projecting provided on one side face of the throttle body (1), wherein the bypass (20) is formed so as to surround the bearing boss (3). This enables the air intake device for an engine to be made compact in spite of the bypass being present.

Abstract: An intake system of an engine, may include first and second intake passages that are collaterally disposed to the engine, first and second shafts that are collaterally disposed along the first and second intake passages respectively, first flaps and second flaps that are mounted on the first shaft and the second shaft so as to open or close the first intake passages and the second intake passages respectively, an inter-lever, of which one end portion is pivotally and eccentrically connected to the first shaft and the other end portion is pivotally and eccentrically connected to the second shaft, and through which a rotation of the first shaft is transferred to the second shaft, and a driving portion connected to the first shaft and rotating the first shaft to have the first flaps and the second flaps open or close the first intake passages and the second intake passages respectively.

Abstract: An improved throttle body includes an offset axis drum valve and shaped throat. The offset axis and shaped throat provide gradual initial opening for better throttle control and the drum valve includes a lower face matching the profile of the air path through the throttle body when rotated to a fully open throttle position, providing an optimal flow at full throttle. The offset axis drum further includes a slightly decreasing radius. As the drum opens, the surface of the drum retreats from the throttle body wall providing clearance for dusty environments and reducing tolerances for reduced manufacturing cost. A fuel injector pocket position provides a spray pattern aligned with an initial air flow as the throttle body opens providing better mixing at part throttle. The throttle body further creates a cavity under the drum in the closed position providing an increased volume in the intake tract which improves throttle response.

Abstract: An inner ring of a bearing is fixed to an outer periphery of a central portion of a shaft between a pair of facing sections. An outer ring of the bearing is fixed to a hole wall surface of a shaft accommodation recess. A spring is accommodated between one of the pair of facing sections and the bearing in a state where the spring is compressed in a rotational axis direction of a pin rod for pressing the bearing against the other one of the pair of facing sections. Thus, defects such as galling or friction between a casing and rotary valves can be inhibited. Accordingly, occurrence of wear or an abnormal noise between the casing and the rotary valves can be inhibited.

Abstract: A throttle includes a throttle body having a generally tubular throttle body side wall with a throttle body side wall interior surface defining a throttle body interior for containing an air flow path for delivering air into at least one cylinder of an engine; and a flow regulating mechanism including an diaphragm valve secured to the throttle body and extending diametrically across the throttle body interior for progressively reducing and progressively increasing the diameter of an air flow passing valve opening defined within the diaphragm valve, and thereby regulating air flow through the throttle body.

Abstract: An air inlet system of an engine includes a throttle, a fan frame, a fan, a valve, a motor, and a throttle sensor. The fan frame has a hole exposed toward outside of the air inlet system. The fan is connected to the throttle and mounted into the fan frame behind the hole. The valve is mounted to the hole. The motor is for driving the fan to force air into at least one intake manifold of the engine through the throttle and is for driving the valve open. The throttle sensor is for controlling the rotational speed of the fan according to the motion of a throttle pedal.

Abstract: An air intake device for an engine is provided that includes a bypass (20) connected to an air intake path (2) while bypassing a throttle valve (5), and a bypass valve (V) for controlling the degree of opening of the bypass (20), the bypass valve (V) being formed from a tubular valve chamber (15) having its interior opening on the upstream side of the bypass (20) and having an inner face with a metering hole (16) opening toward the downstream side of the bypass (20), and a valve body (25) slidably but non-rotatably fitted into the valve chamber (15) and opening and closing the metering hole (16), wherein an inner face (A) of the valve chamber (15) on which the metering hole (16) opens and an outer face (B1) of the valve body (25) opposing the inner face (A) and covering the metering hole (16) are formed in the same shape so as to enable them to be in intimate contact with each other, and other inner (A) and outer faces (B2) of the valve chamber (15) and the valve body (25) are formed so that there is a gap (g

Abstract: A housing having at least one valve seat for at least one flap, which is supported so it can rotate on a drive shaft. The drive shaft is guided on at least one side through the housing, a sleeve, through which the drive shaft is rotatably guided, being disposed fixed in place on the inside of the housing in this area. The sleeve has a first area, which faces the flap and encloses the drive shaft with a first slight play. Furthermore, the sleeve has a second area, which faces away from said flap and has a diameter expansion in comparison to the first area and which, on the front side thereof facing away from the flap encloses the drive shaft with a second slight play. Furthermore, the valve is a gas recirculation valve of a motor vehicle.

Abstract: There is provided an automatic choke apparatus for an engine. A bimetal that is coupled to a choke valve of an intake system is provided in the vicinity of an outer wall face of a muffler. The muffler is divided into a first expansion chamber and a second expansion chamber across a partition plate. An exhaust hole that allows the expansion chambers to be communicated with each other is formed at the lower part of the partition plate. An exhaust gas is guided from the upstream first expansion chamber toward the downstream second expansion chamber through the exhaust hole. A bypass hole is formed at an upper part of the partition plate in such a manner that that the expansion chambers are communicated with each other as bypassing the exhaust hole. The bypass hole is open to the vicinity of the outer wall face opposite to the bimetal.

Abstract: A device is provided for producing and/or augmenting a partial vacuum in a motor vehicle, in particular for operating a partial vacuum brake servo-unit. The device includes, but is not limited to a throttle unit, which has at least one throttle valve housing and a throttle valve which is arranged so as to be rotatable in an angle range in a throttle channel in the throttle valve housing for controlling a fluid flow in the throttle channel. The device also includes, but is not limited to means for producing and/or augmenting partial vacuum, the means being configured as partial vacuum augmentation means integrated into the throttle valve housing, which partial vacuum augmentation means act according to Bernoulli's principle in the manner of a sucking jet pump to produce an augmented partial vacuum for at least one brake servo-unit.

Abstract: A vehicular air intake is configured to produce a turbulent intake air flow in a cylinder of an engine. The air flow may be provided as a vortex. A throttle valve, for controlling an amount of intake air provided to the engine, has a pivot shaft with an axis which is offset from a center axis of an air intake passage in which the throttle valve is installed, and a throttle plate affixed to the pivot shaft. The pivot axis is offset and spaced away from the central axis of the throttle body such that a first portion of a throttle plate disposed on a first side of the pivot shaft, is larger than a second portion of the throttle plate disposed on a second side of the pivot shaft. This arrangement provides the non-uniform turbulent air flow into the engine.

Abstract: A throttle valve device ideal for small, inexpensive implements is provided. The throttle valve device having a damping member for slowly closing a throttle valve. The throttle valve device (1) has a throttle valve (4) that is fixed to a throttle shaft (5) pivotably supported in an air intake passage (2) and that is urged towards the closed direction, the throttle valve (4) adapted for adjusting the amount of air passing through the air intake passage (2). A through-bore (31) penetrating a shaft bore of the throttle shaft (5) is formed in a body, and a damping member (8) having frictional capabilities is inserted into and supported in the through-bore (31) in a state of pressing against the throttle shaft (5) inserted through the shaft bore (51).

Abstract: A ventilation path is provided for communicating an accommodation chamber wherein a transmission mechanism for an electric motor is accommodated and an external space. A covering space is provided for covering an outer end opening of the ventilation path is opened to suppress formation of a water film at the outer end opening. A throttle apparatus includes a housing with covering walls defining covering spaces having open ports which are open to an external space. Lower end openings of ventilation paths are provided for communicating the external space and the accommodation chamber with each other are open to the covering spaces. The opening ports are set to such a size that adhering water flowing down along the lower outer face is cut into pieces between the covering walls and a housing body across the open ports.

Abstract: A method of modifying an air intake manifold to control air intake runners. The method includes the steps of providing a cartridge including a plurality of compartments, each spaced apart to define a groove therebetween, snap-fitting a bushing carrier having a rotatable bushing into each of the grooves, positioning a flap having a slot over each of the compartments, inserting a shaft through each slot and each bushing thereby rotatably retaining each of the flaps within one of the plurality of compartments, positioning the cartridge over the air intake manifold so that each of the plurality of compartments is substantially axially aligned with one of the air intake runners, and removably connecting the cartridge with the air intake manifold.

Abstract: The present invention relates to a control valve (1) for controlling a gas flow in a gas line (3) of an internal combustion engine, in particular in a motor vehicle, comprising a rotationally adjustable flap (4) for controlling a flow cross section (13), a throttling sealing gap (14) which, in a closed position of the flap (4), is formed radially between a sealing contour (15) of the flap (4) and a sealing face (16) which faces the flap (4), and a drive shaft (5), on which the flap (4) is arranged fixedly in terms of rotation.

Abstract: A resin molded body constituting a resin intake apparatus includes a surge tank and a plurality of branch passages each branching off from the surge tank. A communication passage is formed in a wall forming the surge tank to communicate a bottom of the surge tank with one of the branch passages. The resin molded body is formed by two split molded parts integrally welded to each other at welded portions so that the communication passage is formed between the welded portions.

Abstract: An exhaust throttling valve (12) is provided for a vehicle. The valve includes a body structure (16, 41) having a bore (47) there-through. A shaft (28) is supported by the body structure for rotational movement. A valve member (34) is associated with the shaft such rotational movement of the shaft rotates the valve member. The valve member is disposed in the bore and is constructed and arranged to rotate between a first position substantially closing the bore and a second position at least partly opening the bore. A hard stop (56) is associated with the shaft so as to rotate therewith. First and second adjustment structures (52, 54) are constructed and arranged so that upon rotation of the shaft in one direction, the hard stop engages the first adjustment structure and upon rotation of the shaft in a direction opposite the one direction, the hard stop engages the second adjustment structure, thus limiting travel of the valve member.

Abstract: An intake system for an engine includes a duct defining an intake passage therein, and a cantilevered valve including a valve main body opening/closing the intake passage, a shaft supporting the body, and a valve extension portion. The duct includes a reduced passage portion between the duct and the body when the body is in a fully closed position, a recess accommodating the body and the extension portion when the body is fully opened, and a pressure introduction passage formed between the duct and the body when the body is fully closed, and communicating with a space between the body and the extension portion when the body is fully closed. The extension portion includes a sealing part. The duct and the sealing part define a clearance therebetween when the body is fully closed. The clearance has a smaller sectional area than the reduced passage portion.

Abstract: A variable ratio throttle control is disclosed for an off road utility vehicle. The variable ratio throttle control includes a butterfly throttle on a throttle shaft pivotably mounted to a throttle body, a bell crank on the throttle shaft, and a lever extension extending radially from the bell crank to provide an extended lever arm until the butterfly throttle is partially open. A throttle cable is connected between an accelerator pedal and the lever extension, the throttle cable being displaceable by depressing the accelerator pedal to turn the extended lever arm. The lever extension abuts a kick plate once the butterfly throttle is partially open. The butterfly throttle may be fully opened by displacing the throttle cable to turn the bell crank after the lever extension abuts the kick plate.

Abstract: An integrated throttle body for an electronic fuel injection (“EFI”) system and its method of manufacture. The integrated throttle body of the invention comprises a molded throttle body housing in which the throttle valve, shaft, bore and motor housing are all molded in a single shot from a suitable thermosetting resin or thixomolded from magnesium.

Abstract: A combustion engine includes an cylinder block having a combustion chamber formed therein, a throttle body forming a part of an air intake passage for introducing an air therethrough into the combustion chamber, a throttle valve accommodated in the throttle body for adjusting a cross section of the air intake passage, and an electrically driven throttle device having an actuator for driving the throttle valve. At least a portion of the throttle body is positioned intermediate between the actuator and the cylinder block.

Abstract: In an electronic throttle control system, a target intake pipe pressure as well as a presumed value for the intake pipe pressure is calculated, so that a deviation between the target value and the presumed value for the intake pipe pressure is calculated. The deviation is compensated in an advancing side by an amount corresponding to a delay of response in the throttle control system. An intake air amount passing through a throttle valve is calculated based on the above compensated deviation and a presumed intake air amount. A target opening degree of a throttle valve is finally calculated based on the above-calculated intake air amount passing through a throttle valve. Accordingly, a response and stability of the throttle control can be improved.

Abstract: An engine assembly may include a cylinder head, an intake manifold assembly, first and second vanes, and an actuation mechanism. The first and second vanes may be rotatably coupled to the intake manifold assembly. The first vane may be located within an outlet of a first intake passage and the second vane may be located within an outlet of a second intake passage. The first and second vanes may be displaceable from an open position to a closed position. The first vane may extend along a wall defining the first intake passage when in the open position and the second vane may extend along a wall defining the second intake passage when in the open position. The actuation mechanism may be coupled to the first and second vanes to rotate the first and second vanes between the open and closed positions.