Abstract: A system for a vehicle includes a humidity determination module, a specific humidity module, and a parameter control module. The humidity determination module determines a first specific humidity of air based on a relative humidity of the air measured by a humidity sensor in an intake system of the vehicle. The specific humidity module sets a second specific humidity of the air equal to one of the first specific humidity and a predetermined specific humidity of the air in response to a comparison of a mass air flowrate (MAF) into an engine and a predetermined flowrate. The parameter control module controls at least one operating parameter of an engine based on the second specific humidity.

Abstract: An estimation device for a cylinder intake air amount in an internal combustion engine can estimate a cylinder intake air amount to a sufficient accuracy for suitable engine control, in either of steady state operation and transient operation with a small number of adaptation constants and a small amount of calculation load, without requiring a huge memory capacity. The relation between an opening degree and an effective opening area of a throttle valve has been learned, while calculating the cylinder intake air amount in an S/D method from a volumetric efficiency correction factor map adapted by valve timing at the time of steady state operation, and in a period from a transient change until an exhaust manifold temperature is converged, an intake air amount is calculated based on the relation thus learned. The cylinder intake air amount is calculated based on a physical model of an intake system response delay.

Abstract: An object of the present invention is to enable monitoring whether a target throttle opening degree to be given to an electronically controlled throttle is not out of an appropriate range, in a controller for an internal combustion engine with a supercharger. To this end, in a controller according to the present invention, propriety of the target throttle opening degree is confirmed with a reference throttle opening degree as a reference by a monitoring device. The target throttle opening degree is calculated based on a target intake air quantity and a measured value or an estimated value of a supercharging pressure by using an inverse model of an air model expressing a dynamic relation that is established among the supercharging pressure, a throttle opening degree and an intake air quantity, by a first arithmetic unit.

Abstract: An object of the present invention is to detect abnormality of a supercharging pressure sensor accurately in an internal combustion engine equipped with a supercharger that can change a supercharging pressure by operation of an actuator. For this purpose, a control device according to the present invention operates an actuator so that a supercharging pressure measured by a supercharging pressure sensor becomes a target supercharging pressure, acquires a measured value of a flow rate of air flowing in an intake passage, and calculates an estimated supercharging pressure based on the measured air flow rate. The control device according to the present invention sets a first abnormality flag when a first simultaneous inequality is established, which is a simultaneous inequality evaluating magnitude correlation between the measured supercharging pressure, the target supercharging pressure and the estimated supercharging pressure, and is not established when the supercharging pressure sensor is normal.

Abstract: Systems and methods are provided for engine systems including a first multiple tap aspirator with a motive inlet coupled to an intake upstream of an air induction system throttle and a mixed flow outlet coupled to an intake manifold, and a second multiple tap aspirator with a motive inlet coupled to the intake upstream of a main throttle and a mixed flow outlet coupled to the intake downstream of the air induction system throttle. During non-boost conditions, intake air may be selectably diverted around a compressor and through the first and/or second aspirator based on desired vacuum generation. During boost conditions, the first and second aspirators may function as compressor bypass valves, and intake air may be selectably directed from downstream of the compressor to upstream of the compressor via the first and/or second aspirator based on a desired compressor bypass flow.

Abstract: A vacuum source including an ejector is disclosed. In one example, vacuum is supplied via the ejector when a turbocharger has excess boost capacity. The approach can prioritize how excess boost may be used to provide vacuum.

Abstract: A method of controlling an internal combustion engine supercharged by a turbosupercharger having a turbine and a compressor; the control method including the steps of: determining, in a reduced mass flow/compression ratio graph, at least one limit operation curve of the compressor representing a limit of the operating range of the compressor; controlling the turbosupercharger to keep the actual reduced mass flow and actual compression ratio of the compressor within the limit defined by the limit operation curve of the compressor; determining an index as a function of the dynamics of the reduced mass flow of the compressor; and modifying the limit operation curve of the compressor as a function of the index.

Abstract: A method includes: retarding spark timing relative to a predetermined spark timing when an engine torque output reduction is requested for a gear shift; estimating a first torque output of an engine based on N cylinders of the engine being fueled, an engine speed, an air per cylinder (APC), and the predetermined spark timing; estimating a second torque output of the engine based on M cylinders being fueled, the engine speed, the APC, and the spark timing. determining an initial pressure ratio across a turbocharger compressor; determining an adjustment based on M and the first and second torque outputs; generating a desired pressure ratio across the turbocharger compressor based on the adjustment and the initial pressure ratio; and controlling opening of a turbocharger wastegate based on the desired pressure ratio. N is a total number of cylinders of the engine and M is less than or equal to N.

Abstract: A conventional gasoline engine is retrofitted and calibrated to operate as a bi-fuel engine using Hydrogen as the second fuel. When operated with Hydrogen, which typically leads to a reduction of engine output power, the engine is preferably operated in a charged mode and in a lean mode with the engine throttle kept in a wide open position during charged and lean mode operation resulting in a more efficient engine with a reduction of engine output power loss.

Abstract: An engine system may include an electric or mechanical supercharger and an LP-EGR, basically with a turbocharger, an EGR valve, a channel control valve, and a bypass valve, which control the flow rate of external air and exhaust gas, may be integrally operated, and a operation section may be divided into a turbo-lag and low torque section, a mid-load section, and mid/high-load section such that the open amount of EGR valve, channel control valve, and bypass valve may be optimally controlled, such that it may be possible to improve availability for a low-speed/high-load section with turbo-lag reduced, using supercharger and considerably increase the ratio of fuel efficiency improvement in the low-speed/high-load section, using LP-EGR operating with supercharger.

Abstract: An engine is provided. The engine includes a piston operable to reciprocate in a cylinder, a crankshaft rotatably coupled to the piston, and a supercharger rotatably coupled to the crankshaft. The supercharger has an unequal distribution of mass along a longitudinal plane of the supercharger to provide a rotational counterbalance to reduce engine imbalance.

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: An engine system having a compressor coupled to an engine and supplying air to an intake manifold, a throttle controlling the supply of air from the compressor to the intake manifold, a vacuum reservoir, an aspirator having its motive section in fluid communication with the air intake system upstream of the compressor and its discharge section in fluid communication downstream of the compressor and a suction port in fluid communication with the vacuum reservoir, a compressor recirculation valve having a pneumatic control chamber in fluid communication with downstream air from the compressor and in fluid communication with the vacuum reservoir, a gate valve controlling the fluid communication of the pneumatic control chamber of the compressor recirculation valve with the downstream air and the vacuum reservoir, and a bleed line having a bleed valve in fluid communication with the vacuum reservoir and the pneumatic control chamber of the compressor recirculation valve.

Abstract: A method for controlling intake airflow in an internal combustion engine including an intake air compressor includes determining a first compressor boost signal based upon a predetermined intake manifold pressure command, determining a second compressor boost signal based upon a predetermined exhaust pressure limit, determining a compressor boost control command based upon the first compressor boost signal and a limit comprising one of a maximum boost setting and said second compressor boost signal, and controlling the intake air compressor in response to the compressor boost control command.

Abstract: A method and control module for controlling an engine includes a requested torque module that generates a requested torque and a turbo boost level module that determines a desired boost level based on the driver requested torque. The control module further includes a pulse determination module that determines a primary fuel injection pulsewidth and a secondary fuel injection pulsewidth based on the driver requested torque and the desired boost level and controls a first injection into the cylinder with the primary fuel injection pulsewidth and a second injection into the cylinder with the secondary fuel injection pulsewidth.

Abstract: Methods and systems are provided for adjusting intake airflow through two parallel induction passages. In response to increased torque demand, intake airflow may be directed through a first induction passage including an exhaust-driven turbocharger compressor and through a second induction passage including an electric compressor. Further, after the turbocharger compressor increases speed, intake airflow may be directed again through the first induction passage to further increase boost.

Abstract: Methods and systems are provided for adjusting intake airflow through two induction passages. In response to increased torque demand, intake airflow may be directed through a first induction passage including an exhaust-driven turbocharger compressor and through a second induction passage including an electric compressor. Further, after the turbocharger compressor increases speed, intake airflow may be directed again through the first induction passage to further increase boost.

Abstract: An arrangement for control of an engine, the arrangement having a super-charger adapted to be disposed between an air intake and an inlet manifold of the engine, the super-charger device being adapted to boost the pressure of the intake air to the engine. The arrangement also has an exhaust gas recirculation, EGR, system, and a super-charger bypass conduit arranged to facilitate a variable bypassing of the super-charger device, the EGR flow level to be controlled such that the effect of the EGR system on the combustion process of the engine can be continuously varied. The arrangement is further adapted to sense a boost pressure level and an inlet temperature level of the inlet air at the inlet manifold of the engine, and to adjust said super-charger bypass and EGR level in order to reach a pre-determined inlet temperature and boost pressure level, thus facilitating control of the combustion process.

Abstract: Methods and systems are provided for draining condensate from a charge air cooler during a compressor bypass valve event. In one example, an engine controller may open a drain valve in the charge air cooler in response to potential compressor surge conditions. Opening the drain valve may be further based on an amount of condensate in the charge air cooler and a required decrease in pressure at an outlet of the compressor during the compressor bypass valve event.

Abstract: Disclosed is a super-turbocharger system that increases power and efficiency of an engine. The system uses the exothermic properties of a catalytic converter to extract additional energy from exhaust heat that is used to add power to the engine. Compressed air is supplied and mixed with exhaust gases upstream and/or downstream from a catalytic converter that is connected to an exhaust manifold. The gaseous mixture of exhaust gases and compressed air is sufficiently rich in oxygen to oxidize hydrocarbons and carbon monoxide in the catalytic converter, which adds heat to the gaseous mixture. In addition, a sufficient amount of compressed air is supplied to the exhaust gases to maintain the temperature of the gaseous mixture at a substantially optimal temperature level. The gaseous mixture is applied to the turbine of the super-turbocharger, which increases the output of said super-turbocharger, which increases the power and efficiency of said engine.

Abstract: A turbine housing includes a wastegate chamber with a wastegate opening; and a wastegate disposed in the wastegate chamber where the wastegate includes a plug configured to plug the wastegate opening and where the plug includes a surface; a shaft configured for receipt by a bore in a wall of the wastegate chamber; and a rotatable arm extending from the shaft where the arm has a surface configured for contacting the surface of the plug for a closed orientation of the plug with respect to the wastegate opening to transmit force from the arm more centrally to the plug. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.

Abstract: A diesel or diesel-like internal combustion engine drivably connected to a variable internal compression ratio supercharger that supplies varying amounts of air to the engine responsive to the load requirements of the engine. The supercharger has a pair of rotors concurrently driven by the engine to move air to the engine. A slide assembly associated with screw rotors is movable with a controller relative to the rotors to bypass air to atmosphere and regulate the amount of air and pressure of the air compressed by the screw rotors to the engine to increase the engine's efficiency.

Abstract: A supercharger control device for an internal combustion engine is preferably applied to a system having a first supercharger and a second supercharger. A switching supercharging pressure setting unit sets a switching supercharging pressure used in case of switching a mode for operating the first supercharger and the second supercharger, based on a difference between a target supercharging pressure and an actual supercharging pressure. When the actual supercharging pressure reaches the switching supercharging pressure, a switching control unit performs a control of switching the mode. Therefore, it becomes possible to appropriately prevent the overshoot of the supercharging pressure at the time of switching the mode.

Abstract: A supercharger system includes a supercharger main housing enclosing one or more active components for moving air from an upstream side to a downstream side of the supercharger main housing. The system includes a supercharger inlet housing mounted at the upstream side of the supercharger main housing and a re-circulation line. The re-circulation line provides fluid communication between the downstream side of the supercharger main housing and the supercharger inlet housing. The line includes a flow diverter having first and second portions within the supercharger inlet housing. The first portion defines a first re-circulation flow direction and the second portion defines a second re-circulation flow direction. The second direction may be 45-135 degrees relative to the first recirculation direction.

Abstract: A method for diagnosing an actuator for a boost pressure system of an internal combustion engine, in which the actuator is controlled using a triggering signal, and a state variable of the boost pressure system which is at least an indirect function of the triggering signal is detected. The triggering signal is periodic, and a curve of the values of the state variable is analyzed with regard to at least one periodic characteristic.

Abstract: Systems and methods for supplying air to an engine are disclosed. In one example, an air inlet throttle is at least partially closed in response to a change in engine torque request. In another example, the air inlet throttle is adjusted in conjunction with adjusting an engine throttle. The approach can reduce compressor noise and may reduce the possibility of compressor surge.

Abstract: A method of controlling a pump (43), including operating an engine (23) having an engine intake (49) coupled to a pump output (51) of a pump, and a transmission (41) coupled to the engine and to the pump, and operating a valve (58) between a pump input of the pump and the engine intake, such that the valve can be opened during a ratio change of the transmission.

Abstract: A turbocharger system includes a compressor that is connected with a turbine operated by an exhaust gas by a rotary shaft and compresses and supplies external gas to a combustion chamber of an engine, an intercooler and a throttle valve disposed in an intake line connecting the compressor with the combustion chamber of the engine, a branch line connecting an intake line between the compressor and the intercooler with an intake line between the intercooler and the throttle valve, a shutoff valve disposed in the branch line to selectively open/close the branch line, and an engine control unit controlling the operation of the shutoff valve

Abstract: A turbocharger system is described herein. The turbocharger system may include a cylinder head forming a portion of a combustion chamber and including an integrated exhaust manifold in fluidic communication with the combustion chamber and a wastegate valve positioned within the cylinder head including an inlet in fluidic communication with the integrated exhaust manifold and an outlet in fluidic communication with an outlet of a turbine positioned downstream of the integrated exhaust manifold.

Abstract: Methods and systems for minimizing the power consumed by a supercharger pump in an engine system. The methods and systems minimize the delta pressure across the pump with a control strategy for positioning the electronic throttle and supercharger bypass valve in a coordinated manner to deliver the required amount of fresh air flow into engine (i.e., the air flow associated with the driver's requested torque), while, at the same time, minimizing the power consumed by the supercharger pump for best fuel economy.

Abstract: A method for improving purging of fuel vapors from a boosted engine is presented. In one embodiment, the method increases the efficiency of a venturi that supplies vacuum to purge fuel vapors from a vapor storage canister.

Abstract: A method for providing air to a combustion chamber of an engine, the engine including a compressor and a boost tank selectably coupled to an intake manifold. The method comprises admitting air from the compressor to the intake manifold via a main throttle valve, storing some air from the compressor in a boost tank, and discharging some of the air stored in the boost tank to the intake manifold via an auxiliary throttle valve distinct from the main throttle valve.

Abstract: The disclosure provides a turbo-charging apparatus for a vehicle engine, which includes a first and second turbocharger, an inter-turbine passage connecting a discharging port of a first turbocharger turbine with an introducing port of a second turbocharger turbine, a bypass passage connecting an introducing passage of the first turbocharger turbine with the inter-turbine passage, and a control valve for opening and closing the bypass passage. The inter-turbine passage extends substantially straight from the discharging port of the first turbocharger turbine toward the second turbocharger when viewed from a direction parallel to turbine shafts of the first and second turbochargers, which are arranged substantially parallel to each other, so that the inter-turbine passage connects with an outer circumferential part of the second turbocharger turbine so as to extend in a direction tangent to an outer circumference direction of the second turbocharger turbine.

Abstract: A method for providing air to a combustion chamber of an engine, the engine including an intake manifold selectably coupled to a boost tank. The method comprises pressurizing and storing air in the boost tank, discharging some of the air stored in the boost tank to the intake manifold, and releasing condensate from the boost tank.

Abstract: Provided is a bypass valve that diverts some of compressed air in a scroll section to an upstream side of the scroll section via a bypass conduit in an open state and sends the compressed air in the scroll section to a downstream side in a closed state, the bypass valve including a valve body that is fittable in a branch hole in which the scroll section communicates with the bypass conduit, and an actuator that moves the valve body between the closed state where the valve body is fitted in the branch hole and the open state where the valve body is away from the branch hole, in which the valve body forms an inner surface along an inner wall of the scroll section in the closed state.

Abstract: An internal combustion engine for a vehicle can include a crankcase, and a supercharger disposed behind the crankcase in a front-to-rear direction of the vehicle body. A throttle body and an intercooler are connected in the front-to-rear direction, to an intake passage of the engine. The intake passage extends a rearward from a cylinder head, and the cylinder head protrudes substantially upward from the crankcase. The throttle body and the intercooler are connected in this order, in the front-to-rear direction.

Abstract: A control apparatus for a supercharged internal combustion engine, which can achieve a target torque accurately even if the target torque contains a high-frequency vibration component. The control apparatus determines a target air quantity and a target boost pressure from a target torque, operates an actuator for air quantity control according to the target air quantity, and operates an actuator for boost pressure control according to the target boost pressure. The target torque is formed to contain a low-frequency torque component that is set at all times based on a torque requirement from a driver and a high-frequency torque component that is set as necessary for a specific type of vehicle control. When the target torque contains only the low-frequency torque component, the target boost pressure is formed using a pressure component corresponding to the low-frequency torque.

Abstract: A turbocharger compressor bypass valve is disclosed. In one example, the compressor bypass valve operates inversely proportional to engine throttle operation. The approach may simplify compressor bypass valve control and reduced engine system complexity.

Abstract: A supercharger control device that enables the driver of a supercharged vehicle to secure the supercharger with a keyed or other type of switch is disclosed. The supercharger control device can leave the supercharged vehicle with a significant reduction in power, making the supercharged vehicle safer overall. The supercharger control device comprises a check valve and a solenoid valve in parallel configuration with the check valve. The check valve is positioned in-line between a vacuum source and an actuator of a supercharger. The check valve maintains vacuum to the actuator of the supercharger, keeping the supercharger off-line. The solenoid valve is normally in a closed position and is in parallel communication with the check valve. Thus, when the solenoid valve is in an open position, the check valve is bypassed, restoring power to the supercharger. Further, the solenoid valve is typically activated by a switch.

Abstract: A twin turbo assembly is provided for an automotive vehicle that includes a first and second air intake for, a first and second turbo charger that includes, but is not limited to a first and second compressor connected to the first air intake, a first and second intake duct connecting the first turbo charger to a combustion engine. A first and second bypass valve is provided to connect the first and second air intake, respectively to the first and second intake duct bypassing the first and second compressor. Overpressure inside the intake ducts can be discharged to a volume between the air filter and the respective compressor. The released pressure prevents or at least reduces the risk that compressed air inside the intake ducts may flow against the first compressor and the second compressor, so that the noise emission associated with this backflow is reduced or even prevented.

Abstract: An actuator control system includes a controller and a buck-boost circuit. The controller is configured to direct power from a power source to an actuator. The actuator is coupled to a control device to apply a force related to operation of a vehicle. The buck-boost circuit is configured to direct excess power generated by the actuator to an energy storage device when an actuator power level satisfies an anticipated power level.

Abstract: A secondary air injection system supplying some of air introduced into an intake manifold to an exhaust manifold may include: an electric supercharger compressing air introduced through an air duct; throttle valves installed at an upstream of the intake manifold and controlling the amount of air introduced into the intake manifold by controlling the amount of air passing through the electric supercharger; secondary air valves installed on branching paths branched from intake, lines that link the electric supercharger and the throttle vales and controlling the amount of air for secondary air injection; and an injector that post-combusts exhaust gas discharged from an engine by injecting secondary air passing through the secondary air valve to a runner of the manifold.

Abstract: A method of operating a vehicle including an engine is provided. The engine may include at least one cylinder, a boosting device to boost intake air to the at least one cylinder, a fuel tank, a fuel vapor canister to store fuel vapors vented from the fuel tank, and an emission control device to treat exhaust gas from the engine. The boosting device includes a compressor at least partially driven by an electric motor. The method includes during an engine cold start condition, operating the electric motor of the boost device to boost intake air, directing the boosted intake air through the fuel vapor canister to release a fuel vapor stored in the fuel vapor canister, directing the fuel vapor from the fuel vapor canister to the engine, and performing combustion in the at least one cylinder using the fuel vapor during the engine starting.

Abstract: A method for operating a compressor, which supplies an internal combustion engine that is assigned to the compressor at its output end with air compressed to a boost pressure, in which the boost pressure is reducible by releasing the compressed air at least partially via a pressure release valve. The air released via the pressure release valve is used for driving a compressor wheel of the compressor.

Abstract: A valve device controls the air intake for a compressor of a vehicle. The valve device includes a valve housing having a first compressed air inlet for connecting to an ambient air infeed, a second compressed air inlet for connecting to a charge air infeed, through which pre-compressed air can be fed, and a compressed air outlet for connecting to the compressor. The valve device includes a first switched state in which the compressed air outlet is fluidically connected to the first compressed air inlet, and a second switched state in which the compressed air outlet is fluidically connected to the second compressed air inlet. The valve device includes a switching device capable of switching the valve device between the first switched and the second switched state.

Abstract: An internal combustion engine drivably connected to a variable displacement and variable internal compression ratio supercharger that supplies varying amounts of air to the engine air intake manifold that can range selectively from below through above atmospheric pressures responsive to the power requirements of the engine. The supercharger has a pair of rotors concurrently driven by the engine to move air to the engine. A slide assembly associated with screw rotors is movable with a controller relative to the rotors to bypass air to atmosphere and regulate the amount of air and pressure of the air above atmospheric pressure compressed by the screw rotors to the engine to increase the engine's efficiency. When operating at part-load unboosted, a throttle valve is operable to control the air mass flowing to the air intake manifold below atmospheric pressure to control the power of the engine.

Abstract: A waste heat recovery device bypass arrangement includes a conduit having s first end and a second end adapted to connect upstream and downstream, respectively, of a waste heat recovery device, a valve in the conduit, the valve being control-table to open and close, and a controller arranged to control the valve to open in response to a first signal and close in response to a second signal.

Abstract: A method for improving purging of fuel vapors from a boosted engine is presented. In one embodiment, the method increases the efficiency of a venturi that supplies vacuum to purge fuel vapors from a vapor storage canister.

Abstract: A system for controlling a pressure ratio of an output pressure to an input pressure of a compressor associated with an engine is disclosed. The system includes a controller configured to receive signals indicative of an input pressure associated with a compressor, and receive signals indicative of an output pressure associated with the compressor. The controller is further configured to compare a compressor pressure ratio of the output pressure to the input pressure with a threshold pressure ratio, and control a bypass valve in flow communication with the compressor based on the comparison.

Abstract: Disclosed is a supercharged direct-injection engine, which comprises a supercharging device (25, 30) for compressing intake air, and an injector 10 for directly injecting fuel into a combustion chamber 5. In the engine, an excess air factor ? as a ratio of an actual air-fuel ratio to a stoichiometric air-fuel ratio, at least in an engine warmed-up mode, is set to 2 or more in the entire engine-load region. Further, compressed self-ignited combustion is performed in a low engine-load region, and a supercharging amount by the supercharging device (25, 30) is increased along with an increase in engine load in a high engine-load region to allow the excess air factor ? to be kept at 2 or more. The engine of the present invention can effectively reduce NOx emission, while improving fuel economy.