Abstract: The present invention provides an engine control method, for each duty cycle of the engine, said method comprises: receiving a boost pressure of an engine turbocharger; receiving an engine speed; looking up a static control parameter lookup table according to the engine speed and boost pressure so as to select a control parameter indicating the air flow requirement; and sending the selected control parameter to an engine control unit so as to control the engine using the air flow requirement indicated by said control parameter.

Abstract: A vane pack for a VTG turbocharger is provided. The vane pack includes a plurality of vanes pivotably positioned between an inner surface of an upper vane ring and an inner surface of a lower vane ring. Clearances are defined between opposing cheek surfaces of the vanes and the inner surfaces of the vane rings. The vane pack is configured to minimize these clearances by applying an abradable coating is to the inner surface of the upper vane ring, the inner surface of the lower vane ring and/or cheek surface(s) of one or more of the vanes. In this way, an essentially zero clearance can be established without interfering with the proper function of the vanes. As a result, there can be gains in efficiency. Further wearing of the abradable coating may occur during turbocharger operation.

Abstract: An internal combustion engine system includes a cylinder block with a plurality of cylinders, a gas intake manifold for providing at least air to the cylinder block and an exhaust gas manifold for exiting the exhaust gas from the cylinder block, wherein the exhaust gas manifold includes at least a main exhaust gas outlet and a waste gate exhaust gas outlet, wherein the main exhaust gas outlet is connected to a main exhaust gas pipe for guiding the exhaust gas to a main exhaust gas after treatment system and the waste gate exhaust gas outlet is connected to a waste gate exhaust gas pipe, and wherein the waste gate exhaust gas pipe is reconnected to the main exhaust gas pipe upstream of the main exhaust gas after treatment system and includes at least one waste gate exhaust gas after treatment unit, such as an oxidation catalyst such as a diesel oxidation catalyst, for catalytically treating the exhaust gas streaming through the waste gate exhaust gas pipe, and to a method for increasing the temperature in an i

Abstract: The minimum value for the degree of opening of a wastegate valve, wherein the flow volume of exhaust air flowing via a wastegate port when the degree of opening of the wastegate valve is changed toward the open side stops increasing, is defined as a first prescribed degree of opening An electronic control device controls the degree of opening of the wastegate valve on the basis of the engine operating state, and when the vehicle is running steadily at a high speed, that is, when the degree of opening of the wastegate valve which has been set on the basis of the engine operating state is equal to or greater than the first prescribed degree of opening, the degree of opening of the wastegate valve is varied between values equal to or greater than the first prescribed degree of opening.

Abstract: A wastegate valve device for a supercharging device may include a valve disc, which is connected to an actuator device via a drive train. The wastegate valve device may include at least one damping element arranged between the valve disc and the actuator device. The drive train may have an inner section, which is arranged inside a fluid path of a driving fluid. The inner section may include a spindle arm, which is connected to a spindle and to the valve disc. The spindle may be connected to an operating arm, which is arranged in an outer section of the drive train. The operating arm may be arranged outside the fluid path, and may be connected to an operating rod, which is connected to the actuator device. The damping element may be arranged in a connection region of the drive train.

Abstract: A supercharging device of a bifuel engine using a gas fuel and a liquid fuel as fuels, and having a supercharger supercharging or turbocharger turbocharging a large amount of intake air into a combustion chamber of the engine by driving a compressor arranged in an intake passage of the engine by an output shaft of the engine or an electric motor, performs the compressing by the compressor of the supercharger or turbocharger when the gas fuel is used, and does not perform the supercharging or turbocharging by the compressor of the supercharger or turbocharger when the liquid fuel is used.

Abstract: A system is disclosed for use with an engine. The system may have an intake manifold configured to direct air into combustion chambers of the engine. The system may also have an auxiliary device and an exhaust manifold configured to direct exhaust from the combustion chambers of the engine through the auxiliary device to the atmosphere. The system may additionally have a conduit associated with fewer than all of the combustion chambers of the engine and extending to the auxiliary device in parallel with the exhaust manifold, and an auxiliary valve disposed within the conduit and selectively movable between a flow-passing position and a flow-blocking position.

Abstract: A control apparatus for an internal combustion engine is provided that is capable of calculating a high-accuracy turbine rotational speed. A turbo supercharger which includes, in an exhaust passage, a turbine that is operated by exhaust energy of the internal combustion engine. A turbine rotational speed model which calculates a turbine rotational speed. The turbine rotational speed is corrected by an exhaust energy correction part equipped with the turbine rotational speed model.

Abstract: A spark ignition-type internal combustion is provided wherein a first mechanical compression ratio control and a second mechanical compression ratio control are alternatively carried out, the first mechanical compression ratio control makes the mechanical compression ratio in the low engine load side operation area higher than that in the high engine load side operation area to increase the expansion ratio in the low engine load side operation area, the second mechanical ratio control makes the expansion ratio in the low engine load side operation area lower than that in the low engine load side operation area made by the first mechanical compression ratio control and a boost pressure control increases the boost pressure like a step change when the engine load becomes a set engine load in the low engine load side operation area or higher.

Abstract: A wastegate assembly can include a plug configured to plug a wastegate opening where the plug includes a concave, at least partially spherical surface; a shaft configured for receipt by a bore in a wastegate chamber; and a rotatable arm extending from the shaft where the arm includes a convex, at least partially spherical surface configured for contacting the concave, at least partially spherical surface of the plug for a closed orientation of the plug with respect to the wastegate opening.

Abstract: An engine system may include a first intake line connected to an intake manifold and supplying the intake manifold disposed on a cylinder block with outside air, an intake bypass valve disposed on the first intake line, a second intake line that bypasses the first intake bypass valve to the intake manifold, a first exhaust line through which exhaust gas flows from an exhaust manifold disposed on the cylinder block, an exhaust bypass valve disposed on the first exhaust line, a second exhaust line connected to the exhaust manifold and bypasses the exhaust bypass valve, a turbo charger disposed between the second intake line and the second exhaust line and operated by exhaust gas passing the second exhaust line to pump intake air flowing the second intake line, and a control portion that controls the intake bypass valve and the exhaust bypass valve depending on a driving condition.

Abstract: A control apparatus for an internal combustion engine of the present invention switches a steady-state characteristic that defines a relation between an engine load factor and a throttle opening degree between a high atmospheric pressure steady-state characteristic and a low atmospheric pressure steady-state characteristic in accordance with whether or not the atmospheric pressure is higher than a predetermined value. According to the low atmospheric pressure steady-state characteristic, a throttle opening degree corresponding to an identical engine load factor is set to a smaller value compared to the high atmospheric pressure steady-state characteristic in a medium load region, and the throttle opening degree is set so as to increase as the engine load factor increases towards a full load in a region on the side of a higher load factor than the medium load region.

Abstract: An internal combustion engine comprising a dual flow turbocharger includes an annular support with at least one tongue-like end wherein the annular support is adjustable in a translational fashion along the turbines axis of rotation. Moving the annular support influences the degree of separation behavior of turbine channels by varying a tongue spacing to the rotor.

Abstract: A method for engine braking of an engine which has at least one exhaust-gas turbocharger with an exhaust-gas turbine acted on by an exhaust-gas flow and a charge air compressor. A device for throttling exhaust-gas flow is arranged between exhaust outlet valves and the exhaust-gas turbocharger, and a bypass line conducts the exhaust-gas flow past the throttling device, the exhaust-gas flow being conducted through the at least one bypass line to a turbine wheel of the exhaust-gas turbine. An exhaust gas counter-pressure and a charge air pressure are measured. Based on the measurement, an optimum position of the throttling device to obtain a predetermined braking action is determined. The exhaust-gas counter-pressure and the charge air pressure are subsequently controlled by adjusting the throttling device corresponding to the determination of the optimum position of the throttling device.

Abstract: A method for a turbocharger of a heat engine including a turbine, a compressor, and a by-pass actuator that can be used to control an air flow that does not pass through the turbine. The method includes determining a position set point of the by-pass actuator as a function of a compression ratio set point, a compression ratio measurement, a measurement of the rate of flow through the compressor, a measurement of the pressure downstream from the turbine, a measurement of the pressure downstream from the compressor, a measurement of the temperature upstream from the turbine, and a measurement of the temperature upstream from the compressor. The method can be used to control a supercharging device with a single or dual turbocharger.

Abstract: A turbocharger includes a turbine housing defining an exhaust gas inlet, and an exhaust gas exit. The turbine housing is integrated with a housing for a 3-way valve defining a primary through-passage that supplies exhaust gas directly to a catalyst. The exhaust gas inlet is connected to a bypass passage of the valve that allows exhaust gases to flow to the turbine before going to the catalyst. The valve includes a rotary element whose position is controllable to regulate flow through each of the primary through-passage and the bypass passage of the valve. The rotary element is rotatable over a first range of movement and a further second range of movement, the first range including a position in which the bypass passage is substantially fully closed. Over the second range the bypass passage is fully open regardless of the degree of opening or closing of the primary through-passage.

Abstract: A turbo-compound apparatus having a variable geometry turbocharger turbine and an engine system having the same are provided. The turbo-compound apparatus includes a variable geometry turbocharger turbine connected to an exhaust manifold of the engine and having an adjustable mechanism to distribute the exhaust energy between two turbines; a power turbine fitted downstream of the variable geometry turbocharger turbine and driven by exhaust gas passing through the variable geometry turbocharger turbine, an output end of the power turbine being adapted to connect with a crankshaft of the engine to transfer mechanical work output from the power turbine to the crankshaft; and an actuator configured to control the adjustable mechanism according to actual engine operation conditions to regulate the exhaust energy distribution between the variable geometry turbocharger turbine and the power turbine.

Abstract: A turbocharger includes: a turbine housing which houses a turbine impeller; an introduction hole provided in the turbine housing and configured to guide an exhaust gas, which flows into the introduction hole from an exhaust manifold of an engine, to the turbine impeller; a valve provided inside the introduction hole and configured to open and close an exhaust-gas discharge hole in the exhaust manifold; and a restriction portion configured to restrict a turn of the mounting plate in order to make part of an outer peripheral surface of a stem, which is exposed through an exposure hole of the mounting plate, visible from outside of the turbine housing.

Abstract: A wastegate control system and a method for the wastegate control system is disclosed. The wastegate control system includes an ambient pressure sensor, a throttle angle sensor, an ignition timing sensor, a knock sensor, an intake charge temperature sensor and an intake charge humidity sensor. A wastegate is controlled according to information received from these sensors.

Abstract: A compressor housing includes a housing body for enclosing an impeller, an inlet portion for introducing air toward the impeller, and a port portion arranged adjacent to the inlet portion. A valve body for opening and closing a bypass passage, which bypasses the impeller, can be rested against the port portion. A connection hole, to which a return passage for returning blow-by gas of an internal combustion engine is connected, is formed in a side wall of the inlet portion. The inlet portion and the port portion have a common wall. A communication hole, which configures a part of the return passage, is formed in the common wall. The communication hole is formed such that the projection plane defined by projecting the communication hole onto a surface of the side wall having the connection hole along the axis of the communication hole is contained in the connection hole.

Abstract: A motor vehicle is provided having a combustion engine, an automatic transmission, a turbocharger with variable geometry pre-compressing combustion air for the combustion engine and a turbocharger control unit for varying the turbocharger geometry, the turbocharger control unit is equipped before a downshifting of the automatic transmission to vary the geometry in the turbocharger in the direction of a reduction of the rotational speed of the turbocharger.

Abstract: Various systems and methods are described for a variable geometry turbine. In one example, a turbine nozzle comprises a central axis and a nozzle vane. The nozzle vane includes a stationary vane and a sliding vane. The sliding vane is positioned to slide in a direction substantially tangent to an inner circumference of the turbine nozzle and in contact with the stationary vane.

Abstract: An exhaust-gas control device for an internal combustion engine includes a common valve body for controlling a flow in an exhaust-gas channel and for controlling a flow in a bypass channel. The valve body is rotatably arranged in a housing and controls outlet openings of the exhaust-gas channel and of the bypass channel. In one rotational position, the valve body closes an inlet channel by a base and thus interrupts the flow. At the same time, the exhaust-gas channel and the bypass channel are separated from each other.

Abstract: A fixed positive displacement exhaust gas recirculation (EGR) system includes an intake manifold in fluid communication with a fresh intake air source, an exhaust manifold, and an engine having at least one EGR cylinder and at least one non-EGR cylinder. The at least one EGR cylinder is in fixed fluid communication with the intake manifold such that substantially all of the exhaust gas flows from the at least one EGR cylinder to the intake manifold, and the at least one non-EGR cylinder is in communication with the exhaust manifold such that exhaust gas flows from the at least one non-EGR cylinder into the exhaust manifold.

Abstract: A method for adjusting an exhaust heat recovery valve is presented. In one embodiment, the method may control an amount of boost provided by a turbocharger to an engine.

Abstract: In a waste gate valve, a coil spring being expandable and contractible in the axial direction of a valve shaft is provided between a washer and an attachment tongue in an axial direction of a valve shaft of a valve. The coil spring is made of a heat-resistant alloy or a ceramic. An annular guard wall is formed on a front surface of the attachment tongue by counter boring in such a way as to surround the coil spring.

Abstract: In a waste gate valve, an annular spacer is provided between a washer and an attachment tongue in an axial direction of a valve shaft of a valve. The spacer is made of a graphite material. An annular guard wall is formed on a back surface of the washer in such a way as to surround the spacer.

Abstract: Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.

Abstract: Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.

Abstract: Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.

Abstract: Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.

Abstract: Various systems and methods for determining the lift of a wastegate valve are provided. For example, a method comprises determining a relation between an actuator position and a lift of a wastegate valve at engine start-up in a temperature range. The relation may be modified based on a difference between a desired boost level and an actual boost level.

Abstract: Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.

Abstract: Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.

Abstract: Methods and systems are provided for adjusting the opening of a scroll valve of a binary flow turbine. Scroll valve adjustments are used at different engine operating conditions to improve engine performance and boost response. Scroll valve adjustments are coordinated with wastegate and EGR valve adjustments for improved engine control.

Abstract: A flow control device for a turbocharger (100) includes a flow restrictor (102) with a variable position for variably restricting flow in a turbocharger inlet. A controller (312) controls the position of the flow restrictor based on sensed pressure (300) in the turbocharger inlet (301).

Abstract: An assembly can include a turbine housing that includes a bore, a wastegate seat and a wastegate passage that extends to the wastegate seat; a bushing configured for receipt by the bore; a rotatable wastegate shaft configured for receipt by the bushing; a wastegate arm extending from the wastegate shaft; and a wastegate plug extending from the wastegate arm where the wastegate plug includes a profile, defined in part by a portion of a torus, for contacting the wastegate seat to cover the wastegate passage. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.

Abstract: It is intended to provide a wastegate valve which can achieve even and stable seating of the valving element on the valve seat and which can suppress vibration of the valving element, as well as a exhaust gas turbocharger equipped with such wastegate valve. A valving element 13 opens and closes an exhaust gas bypass path, a valve stem 17 stands upright from the valving element 13, an operating lever 15 has one end formed with an insertion hole 29 where the valve stem 17 is inserted with play, a support plate 31 is provided on one end of the valve stem opposite to the other end which is inserted through the insertion hole, and a spring member 19 is provided between the support plate 31 and the operating lever 15 in an axial direction of the valve stem to suppress vibration of the valving element.

Abstract: A spark-ignition supercharged internal-combustion gasoline engine is equipped with a system for variable actuation of the intake valves including a pressurized fluid chamber set between intake valve and a respective control cam, and an electrically actuated valve, the opening of which vents the pressure chamber so as to cause rapid closing of the valve, as a result of the respective elastic return means, even when the respective cam would tend to keep the valve open. The variable-valve-actuation system is used in combination with control cams of the intake valves shaped in such a way as to generate an intake valve lift profile including a boot portion with substantially constant lift. The boot portion is provided in the final part of the opening cycle of the intake valve, after bottom dead center.

Abstract: A method and system is provided for a turbocharged multi-cylinder internal combustion engine comprising a two-channel turbine and at least two groups of cylinders, wherein one group of cylinders is switchable responsive to an engine load over a threshold. Exhaust lines of each group of cylinders are arranged in a targeted manner to couple with the turbine such that the switchable group is attached to one channel and the active group is attached to the other channel to reduce the difference in distances that pressure pulses travel, wherein a shut-off element is provided in the channel attached to the switchable group and may be moved to block exhaust flow through the channel when the cylinders are deactivated, thus improving the partial deactivation and turbocharging characteristics of the engine.

Abstract: A control apparatus for an internal combustion engine of this invention includes: a turbo-supercharger; an exhaust gas purifying catalyst disposed in an exhaust passage on the downstream side of a turbine; and a WGV capable of opening and closing an exhaust bypass passage that bypasses the turbine. At the time of a catalyst warm-up request, catalyst warm-up control that opens the WGV and retards the ignition timing is executed. If the sensitivity of control of an intake air amount by a throttle valve is high, the intake air amount is controlled using the throttle valve during execution of the catalyst warm-up control. If the control sensitivity is low, the intake air amount is controlled using the WGV during execution of the catalyst warm-up control. When the WGV degree of opening is controlled toward a closed side during execution of the intake air amount control using the WGV, a retard amount of the ignition timing is increased.

Abstract: Provided are a wastegate valve control device for an internal combustion engine and a wastegate valve control method for an internal combustion engine, which are capable of controlling a wastegate valve (WGV) to a desired open/closed state at low cost even when a reference position of the WGV is shifted from a full-closure position of the WGV. When a target WGV opening (control target value) is equal to or smaller than a threshold opening, a given opening is added to or subtracted from the target WGV opening while the WGV is controlled to perform an opening/closing operation based on the target WGV opening. By monitoring a change in throttle upstream pressure or driving current of a WGV actuator, an optimal target WGV opening corresponding to the shift of the reference position with respect to the full-closure position of the WGV is determined.

Abstract: An engine assembly includes an intake assembly, a spark-ignited internal combustion engine, and an exhaust assembly. The intake assembly includes a charge air cooler disposed between an exhaust gas recirculation (EGR) mixer and a backpressure valve. The charge air cooler has both an inlet and an outlet, and the back pressure valve is configured to maintain a minimum pressure difference between the inlet of the charge air cooler and an outlet of the backpressure valve. A dedicated exhaust gas recirculation system is provided in fluid communication with at least one cylinder and with the EGR mixer. The dedicated exhaust gas recirculation system is configured to route all of the exhaust gas from the at least one cylinder to the EGR mixer for recirculation back to the engine.

Abstract: The present invention is directed to a blowoff valve assembly that utilizes a non-coiled spring for biasing a valve member in a compact space. The invention is further directed to a turbocharger system utilizing a blowoff valve with a non-coiled spring.

Abstract: A method for mounting and setting an actuator of an exhaust gas turbocharger and a suitable electric actuating device are provided. The actuating device has an axially movable actuating rod which is connected to a coupling element which for its part is connected via a pivot pin to an actuation section of a bypass valve, the actuation section being configured as a lever arm. In order to set the desired closed position of the bypass valve during a predefined actuation of the actuating device, the coupling element is first connected to the actuating rod while still being displaceable. Before the fixing, the position of the actuating device which corresponds to the closed position is set by application of the corresponding voltage to the electric actuating device. Subsequently, a prestressing force is applied to the coupling element coaxially with respect to the actuating rod via a pneumatic actuator.

Abstract: A method for determining intake air leakage in a low pressure EGR system may include a first step of measuring an intake air leaking amount Leak_Air, a second step of determining whether intake air may be leaked by comparing the intake air leaking amount Leak_Air and an intake air leakage determination value Leak_Air_Det with each other, and a third step of notifying leakage information against an intake air leakage when the intake air leakage may be settled.

Abstract: The present invention relates to an exhaust-gas turbocharger (1) having a turbine housing (2) and having a manifold section (3) which is connected to the turbine housing (2), wherein the turbine housing (2) and the manifold section (3) are formed as a single-piece cast part.

Abstract: An exhaust-gas turbocharger (1) having a wastegate arrangement (5) in which the structural adaptability to different installation situations and the sealing action of the wastegate arrangement (5) are improved. The rotor (4) extends along a charger axis (L). The wastegate arrangement (5) has a control capsule (6), a regulating rod (7) which can be moved by the control capsule (6), a lever (8) which is connected to the regulating rod (7) by means of a guide piece (9), and a spindle shaft (10) which is connected at one end to the lever (8) and at the other end to a spindle (11) which bears a flap plate (12) for opening and closing a bypass opening (13). Here, the spindle shaft (10) is arranged substantially parallel to the charger axis (L).

Abstract: A method to avoid over-dilution of an intake-air charge of an engine includes, during a first condition, applying at least some feedback control to the opening and closure of a valve that adjustably admits exhaust to the intake-air charge. During a second condition predictive of compressor surge, no feedback control is applied to the opening or the closure of the valve. Rather, feedforward control is applied to the closure of the valve so that stability in the engine is maintained even during surge conditions.

Abstract: A turbocharger for an internal combustion engine includes a center housing, a shaft rotatably supported in the center housing, and a turbine wheel connected at one end of the shaft. A turbine housing is connected to the center housing and disposed around the turbine wheel. A bore formed in the turbine housing extends from a gas outlet end of the turbine housing to an annular stop surface of the turbine housing disposed adjacent the turbine wheel. A nozzle ring disposed in the bore surrounds a portion of the turbine wheel. An outlet cone is disposed at least partially in the bore and surrounds a remaining portion of the turbine wheel. The outlet cone is connected to the gas outlet end of the turbine housing.