Abstract: A light load air delivery system for an internal combustion engine having a cylinder head defining at least one intake port selectively opened by a poppet valve which is biased against a valve seat area of the cylinder head. The light load air delivery system includes an intake duct and a controllable valve. A light load air intake passage operates to communicate intake air from the intake duct to the controllable valve. Additionally, a light load air intake manifold is configured to selectively receive intake air from the controllable valve. A feed passage receives the intake air from the light load air intake manifold and communicates the intake air to the respective one of the at least one intake ports at a point substantially adjacent to the valve seat area. In a preferred embodiment, the light load air intake manifold is integral to said intake manifold.

Abstract: A system for an engine, comprising of a cylinder located in the engine, a first port injector for injecting a first fuel into said cylinder, and a second injector outside said cylinder for injecting a second fuel into said cylinder.

Abstract: An intake air amount controlling apparatus of an engine is provided. The apparatus comprises an intake manifold that is branched from an intake manifold collecting portion of the engine. The intake manifold communicates with an intake port of a cylinder head of a corresponding cylinder. The apparatus further comprises a throttle valve in the intake manifold of the cylinder and a throttle bore provided in the intake manifold. The throttle bore has a curved surface. The throttle valve rotates such that one half of the throttle valve contacts with the curved surface of the throttle bore until the throttle valve reaches a predetermined opening degree. Thus, an air flow via the one half of the throttle valve is prevented from entering the intake port. An air flow via the other half of the throttle valve is allowed to enter the intake port.

Abstract: An internal combustion engine is described herein. The engine may include a combustion chamber having a pair of intake ports arranged at one side, and an exhaust port arranged at the other side. The engine may also include a fuel injector configured to inject fuel into said combustion chamber from a side of said intake ports toward a side of said exhaust port, a variable flow restrictor capable of making flow resistance of said second intake port greater than flow resistance of said first intake port, a first spark plug arranged on a ceiling of the chamber and having its spark gap in the proximity of a center portion of said ceiling, and a second spark plug arranged on said ceiling and having its spark gap which is positioned closer to said first intake port in the axial direction of said crankshaft than said first spark plug.

Abstract: Variable swirl for internal combustion engines. In one aspect, an apparatus includes a first intake valve controlling air flow from a first intake port to a piston cylinder of the internal combustion engine, where the first intake valve has a first lift profile. A second intake valve controls air flow from a second intake port to the piston cylinder, where the second intake valve has a second lift profile different than the first lift profile. The combination of first and second lift profiles causes a variable swirl of air in the cylinder as a function of engine speed.

Abstract: An apparatus and method for controlling charge motion in the air intake manifold includes a barrel-style valve rotatably mounted in the lower air intake manifold between the linearly arranged set of air inlets and the first and second sets of laterally offset air outlets which branch to the first and second cylinder banks, respectively. The barrel valve includes a plurality of openings and is rotatable between a fully open position wherein the plurality of openings are in alignment with the respective air inlets and outlets in the lower manifold allowing substantially unimpeded airflow therethrough, and fully closed position wherein the plurality of openings are substantially fully out of alignment with the respective air inlets and outlets substantially preventing air flow therethrough while allowing air flow through an air bypass formed adjacent to each air inlet and outlet pair.

Abstract: A method and system of controlling a swirl control valve includes determining whether a current condition is in Tip Out by detecting positions of VGT vanes and an EGR valve, fully opening the swirl control valve if the current condition is in Tip Out, and not opening the swirl control valve if the current condition is not in Tip Out.

Abstract: Fuel injection technology of an internal combustion engine is configured in such a manner that in a case where in inlet pipe interior of the engine is partitioned by a rectifying plate into upper and lower flow paths, a flow velocity at a center of the flow path on an upper side, and at a center of the flow path on a lower side is increased. Consequently, a flow velocity distribution of air in a cylinder diametrical direction of a valve head of an inlet valve becomes a peak value on both sides of the valve head center. Therefore, by impinging most of the injected fuel spray upon both sides of the center of the valve head, vaporization of the fuel spray can be performed with good efficiency.

Abstract: Compression ignition engines and methods of the type wherein the engines operate with one cylinder used as a compression cylinder and a second cylinder used as a combustion cylinder. The engines have all cylinders configured so as to be able to operate as a compression cylinder or a combustion cylinder. In the method of operation, a cylinder may switch its operation between being a compression cylinder and then operate a combustion cylinder. Switching the operation between compression and combustion operation results in an even temperature distribution within the engine, and eliminates the need for special cooling requirements, facilitating retrofit of existing engines. Also use of an air storage tank allows all cylinders to operate as combustion cylinders for short bursts of power. Various other features are disclosed.

Abstract: A variable geometry intake manifold for an internal combustion engine; the intake manifold presents: at least one intake pipe which connects the intake manifold to at least one cylinder of the internal combustion engine; and a choking system to vary the geometry of the intake manifold and comprising at least one choke valve provided with a choke body, which is arranged within the intake pipe and is turnably mounted about an axis of rotation; the choke valve integrates therein a pair of mechanical stoppers, which respectively determine the location of an active position and of a home position of the choke body.

Abstract: The invention relates to an invention combustion engine comprising a cylinder head (1) with at least one inlet port (4) and at least one injection device (6) per cylinder (2), which extends into the combustion chamber. In order to reduce wear of the injection device while preventing depositions in the region of the injector pocket, the top wall (22) of the combustion chamber is provided with an injector pocket (7) in the area of the mouth (6a) of the injection device (6). Preferably, at least one scavenging duct arrangement (10) extends into the injector pocket (7).

Abstract: An apparatus for minimizing spark-knock within a combustion chamber of a spark-ignition internal combustion engine, whereby a control vane mounted inside the intake runner is arranged to direct a fuel-air charge to a region inside the combustion chamber where spark-knock has been empirically determined to occur.

Abstract: An engine with a high pressure common rail fuel system includes a bleed line to tank to facilitate evacuation of air and vapor from the fuel lines to assist in priming the fuel system. An anti-drainback valve prevents fuel vapor from migrating in a reverse direction through the bleed line toward the fuel pump during long periods of engine shut down. The inclusion of the anti-drainback valves helps facilitate short cranking times on the order of three seconds or less during engine start up, even after prolonged periods of engine shut down.

Abstract: An intake throttle valve is located in an intake passage upstream of first and second intake ports, such that intake air flows into mainly the first intake port to generate a swirl flow when an opening degree of the intake throttle valve is not larger than a predetermined value, and flows into both the first and second intake ports when the opening degree thereof is larger than the predetermined value. Furthermore, first and second fuel injection valves for respectively injecting fuel to the first and second intake ports are controlled to inject fuel from the first fuel injection valve when the opening degree of the intake throttle valve is not larger than about the predetermined value, and to inject fuel from both the first fuel injection valve and the second fuel injection valve when the opening degree of the intake throttle valve is larger than about the predetermined value.

Abstract: An intake control valve of an intake device of an internal combustion engine comprises a given portion defined by an air intake passage that leads to a combustion chamber of the engine through an intake valve; a pivot shaft passing through the given portion; and a valve plate secured to the pivot shaft to pivot therewith within the given portion. The valve plate is pivotal between a close position to close the air intake passage and an open position to open the air intake passage. When the valve plate assumes the close position, the interior of the air intake passage downstream the valve plate is formed with mutually isolated first and second air flows that are separated and oriented to enhance a flow of air/fuel mixture in the combustion chamber.

Abstract: A cylinder head for an internal combustion engine wherein intake openings to the cylinder are partly surrounded by a mask formed by a material projection of the top face of the combustion chamber, a contour of the mask having a flat main section of maximum height between an ascending and descending flank and being asymmetrical in a developed view.

Abstract: A system for dampening combustor dynamics within a turbomachine. The system may include at least one resonator installed adjacent a head-end region of a combustion can. The at least one resonator may include a first side having a plurality of holes forming a cold side hole pattern; a second side having a plurality of holes forming a hot side hole pattern; and a cavity substantially defined by the first side and the hot side. The cold side hole pattern may be oriented such that each of the plurality of holes in the cold side hole pattern allows for a jet of a cooling air to substantially impinge a second side facing surface; and wherein the hot side hole pattern is oriented such that each of the plurality of holes in the hot side hole pattern allows for a jet of a working fluid to substantially impinges a first side facing surface.

Abstract: An intake structure for internal combustion engine includes an intake passage which is communicated with a combustion chamber of the internal combustion engine and through which air to be supplied to the combustion chamber flows; and a valve which is provided in the intake passage and which controls the airflow in the intake passage. The intake passage has a recess which is formed in the inner wall face of the intake passage and in which the valve is arranged; and a groove that is connected to the recess, at a substantially center position of the recess in a width direction of the recess, and that extends from the recess toward the downstream side of the intake passage.

Abstract: A method is disclosed for operating an internal combustion engine of the type having an engine cylinder with a reciprocating piston, first and second intake ports for admitting gas from an ambient air supply into the engine cylinder, first and second intake valves each arranged between a respective one of the intake ports and the engine cylinder, a non-return valve arranged in the second of the intake ports at a distance from the second intake valve and oriented to allow gas to flow only towards the engine cylinder, and a variable valve actuating system for controlling the opening and closing of at least the second intake valve. In the method of the invention, in at least one operating mode of the engine, the second intake valve is opened and closed, while the cylinder is fully isolated from the ambient air, to permit gas transfer between the cylinder and an auxiliary chamber temporarily defined by the part of the second intake port lying between the second intake valve and the non-return valve.

Abstract: This invention relates to a combustion chamber structure for a spark-ignition engine, which comprises a combustion chamber defined between a bottom surface of a cylinder head and a top surface of a piston in such a manner that the bottom surface of the cylinder head serves as a ceiling wall thereof, and a spark plug having a sparking end protruding from the ceiling wall into the combustion chamber. In this combustion chamber structure, when the piston is at a top dead center, a principal space of the combustion chamber is comprised of a first combustion space around the sparking end of the spark plug and a second combustion space around a circumference of a cylinder bore. Further, the first combustion space and the second combustion space are communicated with each other through a small interspace zone where an interspace between the ceiling wall and the top surface of the piston is narrowed. The combustion chamber structure makes it possible to increase compression ratio in a practically effective manner.

Abstract: A structured combustion chamber for an engine has a cylinder head with an intake hole portion communicating between an intake port and a combustion chamber and an exhaust hole portion which makes a communication between an exhaust port and the combustion chamber, an intake valve for opening and closing the intake hole portion, and a continuous variable valve lift mechanism for lifting the intake valve in a stepless fashion, a flow promoting device is provided to promote a motion of an air current in the combustion chamber when a quantity of lift of the intake valve driven by the continuous variable valve lift mechanism is small and further to suppress a decrease in flow rate of an intake air coming through the intake hole portion into the combustion chamber when the quantity of lift of the intake valve driven by the continuous variable valve lift mechanism reaches a maximum.

Abstract: An apparatus and method for controlling a plurality of charge motion control devices in the air intake manifold. In a first aspect of the invention, the valves are controlled through a single common drive shaft. In a second aspect, the runners each include an air flow bypass positioned between the valve and the cylinder head mounting end of the runner such that the valve is positioned further away from the combustion chamber.

Abstract: An intake module (1) for an internal combustion engine including a plurality of intake tracts (2, 3, 4, 5) in each of which two intake pipe openings (21, 22; 31, 32; 41, 42; 51, 52) are formed. One of the intake pipe openings (21, 31, 41, 51) in each intake tract has a constant cross section, and the second intake pipe opening has a flow cross section which can be varied depending on the operating mode of the engine. The two intake pipe openings in each intake tract are separated from each other by a partition (23, 33, 43, 53) which is inserted into a housing (6) in which the intake tracts (2, 3, 4, 5) are formed, and a movable component (7) is mounted on each of the partitions (23, 33, 43, 53) for varying the flow cross section of the second intake pipe opening (22, 32, 42, 52) of the respective intake tract.

Abstract: An induction system for a multi valve engine that facilitates operation in a lean burn mode over a large range of speeds and loads by employing a smaller cross sectional branch passages in several induction passages serving a common combustion chamber and a valve arrangement that progressively opens flow first through the branch passages and finally through both the main and branch passages so that maximum power can also be obtained.

Abstract: Enhanced combustibility by increasing the difference in intake gas velocity between a low flow velocity region and first and second high flow velocity regions in an intake port. An intake port of an internal combustion engine has an intake flow control port portion provided with first and second projecting portions. In the passage cross section of the intake flow control port portion, there are provided a low flow velocity region, and first and second high flow velocity regions formed on either side of and across the low flow velocity region and the first and second projecting portions wherein the maximum flow velocity of intake gas is comparatively larger than that in the low flow velocity region. The intake gas reaches intake ports with a flow velocity distribution having the relationship of the magnitudes of flow velocities in the low flow velocity region and first and second high flow velocity regions.

Abstract: An intake and exhaust system for a dual mode HCCI engine, which provides superior intake temperature control and homogeneity for engine operation in SI and HCCI modes, as well as during transition between SI and HCCI modes and vice-versa. The system includes adjusted intake cam movement event lengths for intake valve operation at specified modes of operation. The system further includes at least one cam profile switching device operatively connected to intake and exhaust valves in an engine for controlling event length, maximum lift, and valve opening/closing timings for the intake and exhaust valves. The system yet further includes a bifurcated intake system and camless valve actuators for controlling intake valves for facilitating operation in SI or HCCI modes, as well as transition between SI and HCCI modes and vice-versa.

Abstract: An intake manifold with a swirl system for an internal combustion engine having a number of cylinders; the intake manifold has, for each cylinder, an intake conduit connecting the intake manifold to the cylinder and in turn having two parallel channels; the swirl system has, for each intake conduit, a throttle valve housed inside a channel of the intake conduit to vary the air flow section of the channel, and which has a throttle mounted to rotate about an axis of rotation.

Abstract: Flap bearing mountings of the present invention are for mounting flap devices (5), such as switch-over, tumble, or swirl flap devices, on a housing (2) of an air intake port system (1) of a combustion engine. Mounting of flap devices (5) is accomplished by thermoforming projections (19) that are formed on bearing elements (10) of the flap device (5) and that extend through corresponding apertures (20) formed in the housing (2) of the air intake port system (1) of a combustion engine. This structure makes it possible to cost-effectively and precisely mount one-piece flap shafts (6, 7) in all air intake port systems (1), without having to use additional mounting elements. Through the exact, precise fixing of the mounted position, deformation of the shaft (6, 7), having flap bodies (8) arranged thereon, is reliably prevented and the service life of the entire flap device (5) is prolonged.

Abstract: A divider plate for two or more inlet ports provided in a cylinder head of an internal-combustion engine comprises divider portions that divides inside of the two or more inlet ports along an intake air flow, a side cast-in insert portion provided on at least one side portion located in a direction perpendicular to that of the intake air flow, that is enclosed by molten metal during casting of the cylinder head, an inner cast-in insert portion that is provided between the divider portions, that is enclosed by the molten metal during the casting of the cylinder head, and an inner accelerator formed in the inner cast-in insert portion, accelerates coagulation of the molten metal, wherein the inner accelerator has at least one of a plurality of holes, a concave portion, a convex portion, and a concave-convex portion, or a combination of a hole and a concave portion, a convex portion or a concave-convex portion.

Abstract: A fuel injector for an internal combustion engine which has a spray hole designed geometrically to produce a spray of fuel so that substantially 70% or more of an amount of the spray hits a preselected area of a head of an intake valve of the engine when the intake valve is closed. The preselected area is one of a first and a second area of the intake valve head which are defined by a reference boundary line extending through a base end of a stem of the intake valve. The preselected area is the first area closer to an intake manifold, while the second area is closer to an exhaust valve. This avoids rich misfire and reduces HC emissions from the engine regardless of the intake valve is in a closed state or in an open state.

Abstract: An air intake structure is provided with an air intake control valve disposed in the air intake passage. The air intake control valve has a valve element pivotally mounted at one end adjacent to a passage wall of the air intake passage. The air intake control valve is configured to control a gas flow based on the rotational position of the valve element. A horizontal partitioning plate extends along the flow direction of an intake air. The horizontal partitioning plate can be stationary or moveable with the valve element. The valve element has a swirl-producing notch and a vertical partitioning plate extends substantially perpendicular to the horizontal partitioning plate from a position corresponding to a vertical side edge of the swirl-producing notch when the air intake control valve is fully closed. The vertical partitioning plate can be stationary or moveable with the valve element.

Abstract: An engine ECU executes a program including the step of closing a current control valve in all regions when there is abnormality in a high-pressure system fuel system (YES at S100), the step of setting the VVT overlap to 0, the step of injecting fuel from only an intake manifold injector, the step of corresponding to an ignition timing when the current control valve is closed, and the step of correcting the increased quantity of fuel.

Abstract: An internal combustion engine includes a cylinder having a cylinder inner surface, a cylinder head that cooperates with the cylinder inner surface to define a combustion chamber and has a head inner surface including an intake opening through which an intake gas is introduced into the combustion chamber, an intake valve that opens and closes the intake opening, an ignition plug provided on the cylinder head, and an intake drifting mechanism that causes the intake gas to drift toward an axis of the cylinder in the intake opening and generates a vortex flow in the combustion chamber. When the intake valve is opened, a minimum gap between the intake valve and the head inner surface is equal to or larger than a gap between the intake valve and the cylinder inner surface in a diametrical direction of the cylinder.

Abstract: In an air intake apparatus for an engine, an intake port is connected to a cylinder of the engine and an intake valve opens and closes a downstream end of the intake port. The air intake apparatus includes a partition wall provided along a longitudinal direction of the intake port so as to cross-sectionally partition the intake port into two sections, and an intake control valve provided in a pipe forming the intake port, opening and closing a first flow path implemented by partition by the partition wall, and closing the first flow path and narrowing a second flow path. Assuming a sliding direction of a piston within cylinder as an up-down direction, the intake port is partitioned into two upper and lower sections.

Abstract: A device for adjusting the loading motion of the intake air in internal combustion engines comprises a housing, which can be connected between an intake module and a cylinder head of an internal combustion engine, the surface of the housing facing the intake module having at least a first opening with a first inlet channel for a cylinder of the internal combustion engine and at least a second opening with a second inlet channel for the same cylinder of the internal combustion engine. Each second opening is provided with a helical valve that can be controlled by an actuator.

Abstract: An air intake device of an internal combustion engine comprises a cylinder head having therein two intake ports that are adapted to connect to a cylinder of a cylinder block; and a single partition plate that extends across both the two intake ports so that each of the two intake ports is divided into first and second air passages.

Abstract: An engine air intake manifold has two main body sections that are divided along an airflow direction and mated tightly against each other at oppositely facing mating parts so as to form an air intake passage therein. A gas passage is formed along the mating parts. The gas passage opens into a downstream portion of the air intake passage and supplies a secondary additive gas thereto. Preferably, the engine air intake manifold has air intake branch pipes with valve mounting blocks for mounting air intake control valves to a downstream portion of the air intake branch pipes.

Abstract: The present invention provides a charge motion plate kit for internal combustion engines. More specifically, the charge motion plate kit permits replacement of the OEM charge motion valves of the prior art for high performance applications. In one embodiment, the charge motion plate kit comprises a single charge motion plate for each bank of cylinders, each charge motion plate includes at least one aperture for each cylinder within the bank. The plates are constructed to mount juxtaposed to the intake manifold mounting flange and the cylinder head intake manifold mounting surface in a sandwiched configuration.

Abstract: A propulsion system for a watercraft includes an engine. An air intake device delivers air to a combustion chamber. A throttle valve regulates an amount of the air. A control device sets the throttle valve to a desired position. A remote controller provides the control device with the desired position. The engine can include an auxiliary intake device that delivers supplemental air to the combustion chamber. A control valve normally shuts the supplemental air from the combustion chamber. The control device determines whether an abnormal condition occurs in setting the throttle valve to the desired position. The control device determines whether the amount of the air is insufficient. The control device controls the control valve to allow the supplemental air to move to the combustion chamber when the control device determines that the abnormal condition occurs and the amount of the air is insufficient.

Abstract: In a starting time in which an air motion is little, a means for heightening the motion is added, from the starting time a stratification combustion operation is enabled to carry out, and a discharge of an unburned fuel is minimized. From the starting time of an engine (from the first combustion cylinder) it is possible to carry out a stable stratification combustion. In accordance with the stratification combustion in the exhaust air, a large quantity of the surplus oxygen remains. In the engine in the exhaust stroke twice (two times) fuel injection is carried out and the after-burn phenomenon is caused in the exhaust port and then the exhaust gas temperature can be raised.

Abstract: A system (10) and method for the induction of a fluid into the combustion chamber (15) of an internal combustion engine comprising a cylinder head (12) having at least one intake port (14) communicating with at least one combustion chamber (15) via a valve seat (22) disposed about the intake port (14), and at least one intake valve (16) provided with a valve head (20) having a valve face (21) engageable with the valve seat (22). The valve head (20) is connected to an elongate valve stem (18) that is mounted in the cylinder head (12) for controlling the intermittent flow of fluid from the intake port (14) to the combustion chamber (15).

Abstract: A linear port and a swirl port constitute an intake port of a lean burn engine by using an integrated core. An injector is placed at a desired location of the linear port and the swirl port, thereby facilitating the manufacture of the cylinder head, reducing manufacturing cost, improving fuel economy of the engine, and reducing toxic exhaust gas.

Abstract: A device for changing the angular velocity of airflow may be placed in the air intake line of an internal combustion engine. The device may be constructed from one or more stationary fins. The fins may be curved so that as air passes from a first edge of the fin, past a second edge of the fin, the air moves in a curvilinear or vortical path.

Abstract: An intake apparatus for an internal combustion engine, including a partition extending in a longitudinal direction of an intake port so as to divide an inside region of the intake port into a first passage and a second passage, and a gas motion control valve disposed at a downstream end of an intake manifold and adjacent to an upstream end of the partition. The gas motion control valve includes a rotatable valve element and has a full-closed position where the valve element fully closes the second passage of the intake port and a full-open position where the valve element fully opens the second passage of the intake port. The valve element and the partition cooperate with each other to define an interspace between the valve element and the upstream end of the partition when the gas motion control valve is in the full-closed position.

Abstract: A system and method to control engine valve timing of an internal combustion engine. Electromechanical valves are controlled in a manner to increase fuel economy. Further, the method can adjust valve operation to regulate valve temperature.

Abstract: A fuel injection device is installed in a cylinder head of an internal combustion engine in such a manner that a fuel injection port thereof faces a curved intake passage formed in the cylinder head. Fuel is injected from the fuel injection device directly toward a wall surface of the intake passage without aiming at an intake port.

Abstract: In order to provide an intake flow rate detecting apparatus of an internal combustion engine which accurately compensates for an air flow meter detection error due to intake pulsation so as to make it possible to detect an intake flow rate more accurately, regardless of the of type of flow rate control mechanism, an intake flow rate detecting apparatus according to one embodiment of the invention includes a throttle valve which is provided in an intake passage and which adjusts a rate of the air that is taken into a combustion chamber of an internal combustion engine, at least one flow rate control mechanisms which are provided between the throttle valve and the combustion chamber and which control an air flow rate between the throttle valve and the combustion chamber, and a flow rate sensor which is provided upstream of the throttle valve in the intake passage and which detects a flow rate of air flowing through the intake passage.

Abstract: An SOHC-type engine in which first and second insertion/removal guide sections for guiding the insertion and removal of first and second spark plugs, respectively, are provided on a cylinder head including an intake valve and the first spark plug disposed therein and arranged along an axis of a camshaft, and an exhaust valve and the second spark plug disposed therein and arranged along the axis of the camshaft.

Abstract: A combustion chamber structure for an internal combustion engine is configured with a combustion chamber surface that has a recess disposed around at least a pair of intake openings. The recess defines a pair of intake opening formation surfaces surrounding the intake opening with a pair of steps formed between the combustion chamber surface and the intake opening formation surfaces. A connecting surface interconnects the intake opening formation surfaces. The connecting surface is also recessed from the combustion chamber surface to form a step therebetween and a communication space being formed between the intake openings.

Abstract: In a Diesel engine with variably actuated valves, the cam controlling each inlet valve is shaped to provoke the opening of the respective inlet valve during the engine's normal exhaust phase and thus realize exhaust gas recirculation within the engine, due to the fact that during the normal exhaust phase, part of the exhaust gas passes from the cylinder into the inlet port, from where it returns to the cylinder during the next induction phase, while part of the exhaust gas that had previously passed into the exhaust port returns to the cylinder during the induction phase due to the additional opening of the exhaust valve, in consequence of which the exhaust gas charges that return to the cylinder are subjected to further combustion in the next engine cycle.