Abstract: An intake control device 1 includes: a body 3 including an intake passage 2; and a valve body 4 located in the intake passage 2. The intake passage 2 includes a direction continuation segment 13 in which a first major axis direction d1 and a second major axis direction d2 are approximately parallel to each other continuously from a downstream opening 6 of the body 3. The body 3 includes a seal plane 14 formed along a plane that intersects with part of the direction continuation segment 13. The valve body 4 includes a valve plane 15 formed by a plane that abuts the seal plane 14, and is configured to slide relative to the seal plane 14 via the valve plane 15 to adjust an opening degree of the intake passage 2.

Abstract: An engine includes: an engine main body including a plurality of cylinders; a plurality of exhaust pipes connected to exhaust sides of the plurality of cylinders; a plurality of throttle valves positioned on intake sides of the plurality of cylinders; a catalyst device connected to the plurality of exhaust pipes; and a controller configured to control opening and/or closing operations of the plurality of throttle valves. One of the exhaust pipes is formed shorter than other exhaust pipe. And the controller opens one of the throttle valves upstream of the one of the exhaust pipes at a higher speed or a larger opening degree than other throttle valve upstream of the other exhaust pipe when the engine is started.

Abstract: A compression ignited combustion engine has at least one cylinder and first and second gas intake ports in a cylinder head restricting a combustion chamber. One gas intake passage leads to the two ports and is widened in a Y-shaped end influencing gas entering each port into a tangential flow in opposite direction with respect to the flow into the other port. The first intake port is designed to allow gas entering this port to continue said tangential flow so as to enter the combustion chamber in a swirl in a first rotation direction, whereas the second intake port is designed to guide gas entering this port to also enter the combustion chamber in a swirl in said first rotation direction.

Abstract: A suction tube unit connected between a cylinder block and a carburetor in a stratified scavenging engine has a suction tube for mixture made of an elastic material; and a suction tube for stratified scavenging air made of an elastic material. The suction tube for mixture and the suction tube for air have, at respective inlet ends connected to the carburetor, respective wall portions which face each other and have complementary shapes. A clearance space is provided between the wall portions of the suction tube for mixture and the suction tube for air.

Abstract: An intake duct is adapted to be connected to an intake port of a cylinder head. A branch pipe of the intake manifold has in it a partition extending in a direction of intake air flow, a main passage and a tumble flow passage serving as an auxiliary passage that are defined by the partition, and a valve that opens and closes the main passage. A restrictor that minimizes the cross-sectional area of the tumble flow passage is formed between the upstream end and the downstream end in the direction of intake air flow of the tumble flow passage. The cross-sectional area of the tumble flow passage decreases from the upstream end toward the restrictor and increases from the restrictor toward the downstream end.

Abstract: A system and method for controlling the flow of air to an intake port of an engine is described that includes a flexible intake manifold runner comprised of helically wound braids. In one example, the length and cross-sectional area are mechanically interlinked. In this way, the flexible intake manifold runner can be tuned over a wider operating band while maintaining a lower cost design.

Abstract: A new and improved combustion chamber and cooling system for a fastener-driving tool wherein a new and improved tangentially oriented, vortex induced fuel-injection system is operatively associated with the tool's combustion chamber. In addition, a new and improved trigger-controlled valve actuating system, such as, for example, a switch-operated, solenoid-actuated valve-controlling system, is incorporated within the tool so as to ensure the rapid operation of the intake and outlet valve structures. Still further, a sealed, liquid evaporative or liquid recirculating cooling system is integrally incorporated within the tool housing.

Abstract: A mounting device can mount an intake manifold to an engine and includes a bending moment applying device applying a bending moment to the intake manifold as the intake manifold is mounted to the engine.

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: An internal combustion engine of a manually operated implement, having an elastic connecting duct between the engine and an air filter for vibration-decoupled bridging of a vibration gap between engine and the air filter. The elastic connecting duct has a first conduit for fuel/air mixture and a second conduit for largely fuel-free air. The first and second conduits are separate tubes having respective bores that are separated from one another over their entire lengths, the inlet of the engine is operatively connected to the air filter via the first conduit, and an air duct window of the engine is operatively connected to the air filter via the second conduit.

Abstract: An internal combustion engine having a cylinder, a fuel-supply mechanism, and an elastic connector for connecting the fuel supply mechanism to the cylinder. The connector has a first channel for fuel/air mixture and a second channel for combustion air. The connector has a first connection end and a second connection end at which the two channels open out. The two channels are separated from one another by a partition that extends in the longitudinal direction of the channels. The partition is twisted about its longitudinal central axis between the first and second connection ends to achieve a great elasticity of the connector. To produce the elastic connector, a respective core is used for each channel, and the cores are moved relative to one another to enable removal of the connector from a mold.

Abstract: An air-intake duct of the present invention, configured to guide air to a throttle device coupled to an engine, includes a main wall forming a main passage; and a sub-wall provided outside the main wall to form a sub-passage; wherein the sub-wall has a height smaller than a height of the main wall; and wherein the sub-passage is defined by an inner wall surface of the sub-wall and an outer wall surface of the main wall and is disposed on one side in a direction substantially perpendicular to a passage axis of the main passage.

Abstract: In a variable compression ratio internal combustion engine that controls the compression of an internal combustion engine by changing the volume of the combustion chamber of the internal combustion engine in an axial direction of the cylinder, when a target compression ratio (?t) based on an operating condition of the internal combustion engine is at a reference compression ratio (?0) or greater (S102), the compression ratio is changed to the target compression ratio (S103). When the target compression ratio (?t) is lower than the reference compression ratio (?0) (S102), a control is executed to change the compression ratio and also to strength the tumble flow in the combustion chamber (S104).

Abstract: An intake air control apparatus comprises an intake air path connected to a combustion chamber, and an intake airflow control device having a first opening deviated in one direction when viewed from an axial direction of the intake air path by partially closing a cross-section of a flow path of the intake air path, and that controls distribution of an intake airflow by deviating the intake airflow downstream of the first opening to a side in which the first opening is formed, the intake airflow control device having a second opening of smaller opening area than that of the first opening, and deviated in an opposite side to the side in which the first opening is formed and at a location away from an intake air path wall.

Abstract: An internal combustion engine having a cylinder, a fuel-supply mechanism, and an elastic connector for connecting the fuel supply mechanism to the cylinder. The connector has a first channel for fuel/air mixture and a second channel for combustion air. The connector has a first connection end and a second connection end at which the two channels open out. The two channels are separated from one another by a partition that extends in the longitudinal direction of the channels. The partition is twisted about its longitudinal central axis between the first and second connection ends to achieve a great elasticity of the connector. To produce the elastic connector, a respective core is used for each channel, and the cores are moved relative to one another to enable removal of the connector from a mold.

Abstract: A variable intake device includes an intake pipe through which air flows towards a combustion chamber of an engine, defining a first streamline at an intermediate portion of the pipe, a short-circuit pipe connected at the intermediate portion, defining a second streamline crossing the first streamline at the connected other end, and a valve arranged at the short-circuit pipe adjacent to the intermediate portion. The valve includes a valve body regulating air flow. When the valve allows air flow merging into the intake pipe from the short-circuit pipe, the valve body is positioned to extend in a direction between the extending direction of the first streamline indicated by arrow and the extending direction of the second streamline indicated by arrow. By such a configuration, a variable intake device having pressure loss at the intake path sufficiently reduced can be provided.

Abstract: An air induction system for a vehicle is disclosed, wherein the air induction system includes a resonator bypass valve for control of an air flow to an engine and engine induction noise levels emitted therefrom.

Abstract: A lower intake manifold assembly includes a lower housing and a runner insert fitted into the lower housing. The lower housing may be made of metal and the runner insert may advantageously be made of a synthetic resin material. The runner insert provides a sealing surface between the lower housing and the cylinder head of an internal combustion engine. The runner insert also supports a charge motion control valve flap assembly that advantageously may include a shaft and synthetic resin flaps over-molded onto the shaft.

Abstract: An internal combustion engine intake device includes an intake collector and a first air induction pipe. The intake collector includes a first collector space and a second collector space. The first air induction pipe extends diagonally downward from an upstream side of the intake collector with respect to a horizontal direction of the vehicle. The first air induction pipe includes a first air induction space and a second air induction space. The intake collector and the first air induction pipe are configured and arranged such that a first boundary plane defined between the first collector space and the first air induction space is substantially perpendicular to a direction of an intake air flow from the first air induction space into the first collector space and the first boundary plane is substantially coplanar with a second boundary plane defined between the second collector space and the second air induction space.

Abstract: In an arrangement and method for operating an internal combustion engine with at least two intake pipe tracts connected each to one group of cylinders, with each of the intake pipe tracts including at least one independently adjustable throttle element for controlling the intake air pressures in the respective intake pipe tract, at least one pressure equalizing means is provided for equalizing the intake pipe pressures in at least one operating mode under the control of a control unit which actuates the throttle element and the pressure equalizing means depending on the engine operating state.

Abstract: An internal combustion engine having an intake channel for supply of fuel and combustion air, and divided over a portion of its length into a mixture channel, and into a supply channel for supply of largely fuel-free air. A simple manufacture of the engine and a simple construction are achieved if a portion of the intake channel is guided in an elastic intake adapter, whereby the intake adapter has a partition that extends over at least a portion of the length of the intake adapter and divides the intake channel into a mixture channel and a supply channel.

Abstract: An intake apparatus for an internal combustion engine, including a partition dividing an intake port into a first passage and a second passage, and a gas motion control valve including a rotatable valve element disposed upstream of the partition and spaced from an upstream end thereof. The gas motion control valve has a full-closed position where the valve element prevents intake air from flowing into the second passage and a full-open position where the valve element allows the intake air to flow into the second passage. The valve element is inclined so as to guide a flow of the intake air to the first passage when the gas motion control valve is in the full-closed position. The valve element and the partition cooperate with each other to define an interspace therebetween when the gas motion control valve is in the full-closed position.

Abstract: A cylinder head of an internal combustion engine comprises a structure cast in metal, the structure defining therein an intake port and having a side wall surface from which an upstream end of the intake port is exposed to the outside; and a partition plate of metal installed in the intake port to divide the same into two parallel intake conduits, the partition plate having lateral edges which are embedded in an inner wall of the intake port. The partition plate has an upstream edge which includes a major straight portion and two projected end portions which are provided on both ends of the major straight portion respectively, and the major straight portion is positioned inside relative to the side wall surface and the two projected end portions have upstream edges which are embedded in the inner wall of the intake port and machined to be flush with the side wall surface.

Abstract: An intake system for an internal combustion engine in which the inflow characteristic of a mixture of gas is varied by a partition wall provided replaceably in an intake port opening, whereby the output characteristic of the internal combustion engine is regulated to a desired condition, and a vehicle having appropriate operating characteristics is provided. A replaceable partition wall A is mounted in an intake port opening 1a of an internal combustion engine. The partition wall A is composed of a plate P that differs in length as compared to other plates. The plate P is inserted into an upper-lower pair of grooves provided in the intake port opening 1a, whereby the plate P is replaceably mounted, and the inflow characteristic of a mixture of gas sucked in through the intake port opening 1a is varied by replacement of the plate P thus mounted, whereby the output characteristic of the internal combustion engine is regulated to a desired condition.

Abstract: An inside space of a starter motor having a motor, a magnetic switch and a reduction gear train is ventilated through a ventilation passage formed in the starter motor. The ventilation passage includes a labyrinth passage formed at a portion connecting a front housing containing the reduction gear and a center housing containing the motor and the magnetic switch. The labyrinth passage connecting a motor chamber and a switch chamber prevents brush dusts generated in the motor chamber from being scattered in the other spaces. Grease splash from the gear train does not enter into the ventilation passage separated the gear train. Thus, the ventilation passage well functions for a long time without being clogged with the grease, brush dusts or the mixture thereof.

Abstract: To improve the efficiency of assembling multiple on-off valves into a manifold body and reduce resistance to rotation of a shaft after assembly, frame members (3) are fitted in downstream end portions of individual intake passage sections (12) of a manifold body (2), on-off valves (4) are placed inside the individual frame members (3) and a shaft (5) is passed through the on-off valves (4) in such a way that the frame members (3) constitute parts of inside walls of intake passages where the on-off valves (4) are located, the frame members (3) rotatably supporting the on-off valves (4) and the shaft (5). A cutout (23) is formed in a surrounding wall of each frame member (3), thereby making each frame member (3) expandable and compressible by elastic deformation.