Abstract: The present invention is directed to address the following problem: in an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst, reduction in the gas diffusivity of the underfloor catalyst results in reduction in the use efficiency of a catalytic active site, resulting in reduction in purification performance. The present invention relates to an exhaust gas purification catalyst comprising a dual catalyst of a combination of a startup catalyst and an underfloor catalyst having a catalyst coating where a large number of voids are included, wherein high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain rate or more of the whole volume of the voids, to thereby enhance the purification performance of the catalyst.

Abstract: A system includes an exhaust aftertreatment system operatively coupled to an engine. The exhaust aftertreatment system includes an exhaust aftertreatment component. A flow sensor is structured to provide an exhaust flow rate value of exhaust gas exiting the engine. A temperature sensor is structured to provide an exhaust temperature value of the exhaust gas proximate the exhaust aftertreatment component. A controller includes an exhaust conditions circuit structured to interpret the exhaust flow rate value via operative communication with each of the flow sensor, and to interpret the exhaust temperature value via operative communication with the temperature sensor. A regeneration time circuit is structured to determine a regeneration time value based on each of the exhaust flow rate value and the exhaust temperature value via a regeneration time lookup table. A regeneration control circuit is structured to control regeneration of the exhaust aftertreatment component based on the regeneration time value.

Abstract: An immersion heater including an encapsulated, semi-conductive, heating element. The heating element may be a non-metallic, carbon-based material in the form of a monofilament, a yarn or bundle of semi-conductive fibers which may be twisted, braided fibers or yarns, or the like. The encapsulation may be in the form of a tube of one or more layers of encapsulation material(s) with the heating element inserted therein. Alternately, the heating element may be thermoplastic with semi-conductive carbon additive, and the heating element may be coated with one or more external layers of insulating encapsulation material(s). The encapsulation material may be a rubber or thermoplastic material with sufficient chemical resistance to be immersed in a reservoir of fluid subject to freezing or thickening at low temperatures, such as DEF. The heater may be thermoformed into a predetermined fixed shape.

Abstract: On a revolving frame (5), a counterweight (6), an engine (7), a cooling fan (9), a heat exchanger (10), an exterior cover (14) forming a machine room (15) on the revolving frame (5), an exhaust gas purifying device (16) including a urea selective reduction catalyst (24), a urea water injection valve (26) injecting a urea water which is a reducing agent toward an upstream side of the urea selective reduction catalyst (24), and a urea water supply line (28) through which the urea water to be supplied to the urea water injection valve (26) flows are provided. A horizontal support member (34) supporting the exterior cover (14) is provided on a front side of the counterweight (6), and a heat shield cover (38) is mounted on the horizontal support member (34). A line accommodating space (41) is formed between the horizontal support member (34) and the heat shield cover (38), and a urea water supply line (28) for shielding heat from the engine (7) is accommodated in this line accommodating space (41).

Abstract: An exhaust gas purification apparatus for an internal combustion engine comprises an ammonia supplier which includes a storage unit configured to store a precursor of ammonia or ammonia (reducing agent or the like), and a controller programmed to carry out output restriction control as such control that an output of the internal combustion engine is restricted to be not more than a predetermined output such that a NOx purification rate brought about by the storage reduction NOx catalyst is within an allowable range if an amount of the reducing agent or the like stored in the storage unit is less than a predetermined storage amount.

Abstract: A selective catalytic reduction device (SCR) system performs intrusive steady state dosing correction (SSDC) when a NOx error between a predicted and measured downstream NOx value exceeds a threshold. In SSDC, if NOx breakthrough or NH3 slip is detected above a SSDC threshold, a short term reductant dosing adaptation occurs. Optionally long term dosing adaptations occur if the magnitude of previous short term adaptations exceed a short term adaptation threshold. If SSDC is insufficiently improving SCR performance based on the number of intrusive events occurring within a period of time and the change in NOx error during the time period, a method includes modifying the SSDC protocol by one or more of increasing the duration of short term adaptations, decreasing the SSDC threshold, and reducing the short term adaptation threshold. The method further includes subsequently inhibiting intrusive events from occurring.

Abstract: Systems are provided for a mixer. In one example, the mixer may include intersecting tubes with a plurality of inlets and/or outlets located along an exhaust conduit.

Abstract: Methods for monitoring thermal characteristics of oxidation catalyst (OC) catalytic composition(s) (CC) are provided, and comprise communicating exhaust gas to the OC, and determining a temperature change of the CC for the time frame based on a plurality of heat sources including heat imparted to the CC from exhaust gas enthalpy, heat imparted to the CC via oxidation of HC and/or CO in exhaust gas, heat imparted to the CC via water present in the exhaust gas condensing on the CC or heat removed from the CC via water evaporating from the CC, and optionally heat exchanged between the CC and the ambient environment. Heat imparted to the CC via water condensing on the CC can be determined using an increasing relative humidity proximate the CC, and heat removed from the CC via water evaporating from the CC can be determined using a decreasing relative humidity proximate the CC.

Abstract: Methods and systems are provided for diagnostics of a gasoline particulate filter in an exhaust system. In one example, a method may include indicating degradation of a hose coupled across a particulate filter responsive to a difference between a first differential pressure and a second differential pressure being greater than a threshold, the first differential pressure measured by a differential pressure sensor positioned in the hose responsive to a downstream exhaust tuning valve being fully open, the second differential pressure measured by the differential pressure sensor responsive to the exhaust tuning valve being fully closed.

Abstract: A configuration for a uniflow-scavenged, opposed-piston engine reduces exhaust cross-talk caused by mass flow between cylinders resulting from one cylinder having an open exhaust port during scavenging and/or charging while an adjacent cylinder is undergoing blowdown. Some configurations include a wall or other barrier feature between cylinders that are adjacent to each other and fire one after the other. Additionally, or alternatively, some engine configurations include cylinders with intake and exhaust ports sized so that there is an overlap in crank angle of two or more cylinders having open exhaust ports of about 65 crank angle degrees or less.

Abstract: A system including startup, load, flow, and peak estimation modules. The startup module, during a startup period or in response to a startup of the engine, receives a temperature signal and generates a first condition signal. The load module determines a load on the engine and generates a second condition signal. The flow module, if the first condition signal indicates a temperature of the engine is less than a first predetermined temperature and if the second condition signal indicates the load is less than a predetermined threshold, operates a pump to circulate coolant during the startup period. The peak estimation module estimates a temperature of a hottest metal location on the engine. The flow module increases a speed of the pump if the temperature of the hottest metal location is greater than a second predetermined temperature or the load is greater than or equal to the predetermined threshold.

Abstract: In an internal combustion engine, a thermostat valve for changing over between coolant circulation through a radiator-routing passage to coolant circulation through a bypass passage, is provided with a first valve for opening and closing the radiator-routing passage, and a second valve for opening and closing the bypass passage. The first and second valves and are operable concurrently. A cylinder coolant jacket around cylinder bores of a cylinder portion is partitioned into two in a cylinder axis direction to thereby form a main cylinder coolant jacket on a side of a cylinder head portion and a sub-cylinder coolant jacket on a side of a crankcase portion. The bypass passage is formed partly by the sub-cylinder coolant jacket. The above arrangement expedites warming-up during the engine start and achieves favorable appearance by a simplified structure.

Abstract: An internal combustion engine with a cylinder head and at least one piston-cylinder unit, in which, in a cylinder, a piston can be moved between a bottom and a top dead center position, where, in the cylinder, between the piston and the cylinder head a main combustion chamber is formed, which communicates with a prechamber which has a prechamber gas valve, and where the intake and outlet valves of the main combustion chamber are actuated by an actuator, where the prechamber gas valve is connected to a source for a gas-air mixture and the prechamber charge consists of a gas-air mixture with a lambda higher than 1.2, preferably higher than 1.5 and particularly preferably higher than 1.7, and the actuator is configured such that the intake valve closes before the piston reaches the bottom dead center position, where the piston is designed as a flat piston.

Abstract: Provided is an air charging apparatus driven by a rotating magnetic field and compressing or pressurizing and transferring air. The air charging apparatus includes at least one impeller sucking air and giving kinetic energy to intake air; an impeller case leading external air inhaled by the impeller into the impeller and converting velocity energy of air out of the impeller into air having pressure energy to discharge air; and a rotating body accelerator equipped with the impeller and the impeller case and driving the impeller. Here, the rotating body accelerator drives the impeller by generating a torque by interaction with an intake negative pressure, by generating a torque by interaction with the intake negative pressure and using supplied power, or by generating a torque using supplied power.

Abstract: An engine is disclosed of the V-configuration having an integrated engine and transmission. The engine has a crankshaft which directly couples to drive the water pump, oil pump and transmission clutch. The water pump has a drive shaft coupled to the crankshaft that extends across the crankcase from a first to a second side. The water pump includes a housing where at least a portion is defined in the face of the crankshaft.

Abstract: Core assemblies and methods for manufacturing components of gas turbine engines include a first core body having a first trunk configured to attach to a first location of a cavity core structure, a first branch extending from the first trunk and configured to form a first portion of a first cooling circuit, the first branch having a first joining surface, and a second core body having a second trunk configured to attach to a second location of a cavity core structure, a first branch of the second core body extending from the second trunk and configured to form a first portion of a second cooling circuit in the component. The first branches of the core bodies joined to form a junction. The junction defines a merger of the first cooling circuit and the second cooling circuit proximate to an exit of the first and second cooling circuits.

Abstract: A two-shaft gas turbine of the present invention, in which a mass flow of an air into a compressor is regulated by controlling a set angle of an inlet guide vane (IGV) on an air intake side of the compressor, comprises, as a device to control the set angle of the IGV, a first controller to control the set angle of the IGV based on a corrected speed of the gas generator shaft during low speed rotation of the gas generator shaft, the corrected speed having been corrected according to an ambient temperature; a second controller to control the set angle of the IGV to maintain a constant actual speed of the gas generator shaft during high speed rotation of the gas generator shaft; and an ambient temperature correction part to increase the actual speed maintained constant by the second controller if the ambient temperature is equal to or more than a threshold value.

Abstract: A method of heating a hollow structure and a heating system are provided. The system includes a plurality of hollow structures spaced circumferentially about an annular flow path. The hollow structures include a heating fluid inlet port, a first plurality of film heating apertures, and a second plurality of film heating apertures. The hollow structures also include a first internal passage extending between the heating fluid inlet port and the first plurality of film heating apertures. The first internal passage includes an impingement leg configured to channel a first flow of heating fluid to a leading edge of the hollow structure. A second internal passage extends between the heating fluid inlet port and the second plurality of film heating apertures through a path along an inner surface of the hollow structure before being channeled to the second plurality of film heating apertures.

Abstract: The present application provides a filtration system for a gas turbine engine. The filtration system may include a holding frame with a positioning element extending therefrom and a filtration unit for mounting within the holding frame. The filtration unit may include a positioning slot therein such that the positioning element extends through the positioning slot when the filtration unit is mounted within the holding frame.

Abstract: A cooling fluid system for a gas turbine engine includes a structure that provides a fluid passageway. The structure has a wall with an aperture that is in fluid communication with the fluid passageway. The aperture is configured to provide a fluid in a flow direction. Fingers are arranged in the fluid passageway facing into flow direction. The fluid passageway includes a cooling cavity immediately downstream from the fingers and it is configured to receive fluid having passed over or through the fingers.

Abstract: The invention refers to a combustor arrangement of a gas turbine engine or power plant, having at least one combustion chamber, at least one mixer for admixing a dilution medium or air to the hot gas flow leaving the combustion chamber. The mixer is configured to guide combustion gases in a hot gas flow path extending downstream of the combustion chamber, wherein the mixer includes a plurality of injection pipes pointing inwards from the side walls of the mixer for admixing the dilution medium or air to cool the hot gas flow leaving combustion chamber. The mixer includes at least one dilution air plenum having at least one pressure-controlled compartment which is directly or indirectly connected to at least one injection pipe.

Abstract: The invention concerns a gas turbine fuel pipe, having a fuel line, the fuel line having a fuel line volume, a fuel line outer wall and an opening in the fuel line outer wall, a damper having a damper volume and a damper outer wall and attached in fluid communication with the fuel line, wherein the damper covers the opening in the fuel line outer wall, and a perforated lining extending across at least part of the opening in the fuel line outer wall.

Abstract: An aircraft drive chain including a plurality of main gears engaging with each other, a first main gear including a wall defining an inner space, an outer set of gear teeth being placed on an outer surface of the wall, the outer set of gear teeth engaging with at least one second main gear, a gear system being built into the inner space, the first main gear and the gear system being jointly configured so as to form a gearbox or reducer and ensure mechanical power transfer between a drive member and a slave member, the gear system being mounted onto the wall with a decoupling member.

Abstract: A gas bottle assembly may be provided for a gas turbine engine system. The gas bottle system may include a gas bottle, a regulator cavity, a conductor coil, and an insulating jacket. The gas bottle may be configured to store and selectively release pressurized fluid. The regulator cavity and conductor coil may be in fluid connection with the gas bottle. The conductor coil may be disposed around at least a portion of the gas bottle. The insulating jacket may disposed around at least a portion of the gas bottle, pressure regulator, and the conductor coil. The conductor coil may be configured to maintain or decrease a temperature of the gas bottle while the insulting jacket resists heat from other portions of the engine system.

Abstract: The present invention generally relates to a diverting system to be used in a combined-cycle power plant. According to the invention, the diverting system is integrated within the by-pass stack and carries out, in a sole component, the functions of by-passing the hot exhaust flow in a single-cycle configuration or guiding it through the HRSG, acting as a diffusor, in an open combined-cycle configuration.

Abstract: A valve actuation system is disclosed for an engine. The valve actuation system may have a variable valve actuator that is configured to engage a rocker arm and hold the valve at an open position regardless of motion of a cam lobe. The variable valve actuator may have a housing forming a chamber, a plunger disposed in the chamber, a control valve movable to control a flow of fluid into the chamber, and a relief valve configured to automatically open and release fluid from the housing when a pressure inside the chamber is below a predetermined pressure. The valve actuation system may further have a controller configured to cycle the control valve prior to start-up of the engine and to selectively move the control valve after start-up.

Abstract: A power cylinder assembly for an internal combustion engine includes a cylinder wall that surrounds a cylinder bore that extends along an axis. A piston assembly is positioned in the cylinder bore, and the piston assembly has a combustion surface that divides the cylinder bore into a combustion chamber on one axial side of the combustion surface and a crank case on an opposite axial side of the combustion surface. The combustion surface is partially defined by a first upper surface of a first piece and partially defined by a second upper surface of a second piece. The second piece is moveable relative to the piston body during operation of the power cylinder assembly to change a compression ratio of the power cylinder assembly.

Abstract: In high horse power engines there are strict energy budgets allotted for each subsystem. It is a challenge for a gaseous fuel pumping system to supply the necessary gaseous fuel mass flow to the engine while staying within budget. A method for pressurizing a gaseous fuel supplied to an engine comprises providing first and second hydraulically actuated pumping apparatus comprising first and second shuttle valves in first and second hydraulic pistons respectively; and selectively communicating hydraulic fluid flow to the first and second hydraulically actuated pumping apparatuses. In a first mode hydraulic fluid is communicated through the first hydraulically actuated pumping apparatus to the second hydraulically actuated pumping apparatus. In a second mode hydraulic fluid is communicated through the second hydraulically actuated pumping apparatus to the first hydraulically actuated pumping apparatus.

Abstract: A vehicle drive system is disclosed comprising an internal combustion engine for driving a vehicle, wherein the internal combustion engine comprises a combustion chamber with injectors for injecting diesel into the combustion chamber, a supply line for delivering a gas mixture to the combustion chamber, an electrolysis chamber for producing hydrogen gas and oxygen gas, and a vacuum pump for sucking the hydrogen gas and the oxygen gas from the electrolysis chamber. The vehicle drive system furthermore comprises a gasification tank with volatile organic compounds received therein, in particular methanol or ethanol, as well as a supply line for supplying a gas mixture to the combustion chamber, wherein the gas mixture comprises gasified organic compounds from the gasification tank and at least a part of the hydrogen gas and the oxygen gas. Furthermore a corresponding method for operation a vehicle drive system is disclosed.

Abstract: Embodiments for determining oxygen concentration using an oxygen sensor are provided. In one example, a method for determining oxygen concentration O2 in a gas flow of an internal combustion engine which is equipped with an engine controller and an oxygen sensor comprises determining the oxygen concentration O2,sens of the gas flow in a ceramic measurement cell of the sensor by current ISens which is detected by measurement and which flows when a constant voltage USens is applied and maintained, and correcting the oxygen concentration based on a pressure pSens at the measurement cell. In this way, the measured oxygen concentration may be corrected based on the pressure of the air at the sensor.

Abstract: A simple and effective control method is disclosed for starting and stopping a vehicle's engine and automatic lighting of position lamps to show the vehicle's location. The method uses brake and gear shift lever of the vehicle to generate selection signals, and a button switch can be pressed to stop or start the engine of the vehicle according to the selection signals, which can provide vehicle drivers a simple and secure way to control their vehicles while waiting at a stoplight.

Abstract: A method for controlling valve timing for an engine includes: classifying a plurality of control regions depending on an engine speed and an engine load; applying a maximum duration to an intake valve and controlling an exhaust valve to limit a valve overlap in a first region; controlling the intake valve and the exhaust valve to maintain the maximum duration in a second region; advancing an intake valve closing (IVC) timing and an exhaust valve closing (EVC) timing in a third region; approaching the IVC timing to a bottom dead center (BDC) in a fourth region; controlling a throttle valve to be fully opened, advancing an intake valve opening (IVO) timing before a top dead center (TDC), and controlling the IVC timing to be a predetermined value after the BDC in a fifth region; and controlling the throttle valve to be fully opened and advancing the IVC timing in a sixth region.

Abstract: A dual fuel engine control system includes a pressure sensor, and an electronic control unit coupled with the pressure sensor and structured to receive cylinder pressure data indicative of cylinder over-pressurization, and to switch the system to a limited gas-to-liquid substitution mode based on the cylinder pressure data indicative of cylinder over-pressurization. The electronic control unit is further structured to return the system to a normal gas-to-liquid substitution mode, receive cylinder pressure data indicative of cylinder over-pressurization after returning the system to the normal gas-to-liquid substitution mode, and responsively output a gas substitution fault signal.

Abstract: Methods and systems are provided for exhaust heat recovery and EGR cooling via a single heat exchanger. In one example, a method may include selecting a specific mode of operation of an engine exhaust system with the heat exchanger based on engine operating conditions and an estimated fuel efficacy factor. The fuel efficiency factor may take into account fuel efficacy benefits from EGR and exhaust heat recovery.

Abstract: Methods and systems are provided for particulate matter control in an engine configured for skip-fire operation. A cylinder pattern selected for selective cylinder deactivation, including a total number of deactivated/active cylinders as well as individual deactivated cylinder identities, may be adjusted based on an engine soot load, or a parameter indicative of engine soot load such as engine coolant temperature. In addition, reactivated engine cylinders may be transiently operated with split fuel injection to raise combustion surface temperatures.

Abstract: A rich control for temporarily declining an air-fuel ratio of exhaust gas discharged from an engine combustion chamber is performed by an additional fuel being injected into a cylinder in an expansion stroke or an exhaust stroke in a state where a throttle opening degree is switched from a base throttle opening degree to a throttle opening degree for the rich control and an EGR rate is switched from a base EGR rate to an EGR rate for the rich control. The rich control is terminated by returning the throttle opening degree (VTH) to the base throttle opening degree (VTHB), stopping the injection of the additional fuel (Qa), and temporarily increasing the amount of a main fuel (Qm). Then, an EGR control valve opening degree (VEGR) is controlled such that the EGR rate (REGR) is returned to the base EGR rate (REGRB).

Abstract: Methods and systems are provided for detecting spark plug fouling and cleaning up fouled spark plug during pre-delivery phase of a vehicle. In one example, a method may include updating a spark plug fouling index saved in the non-volatile memory of the vehicle based on engine operating parameters, and indicating spark plug fouling based on the updated index. The method may further include cleaning the fouled spark plug by driving the vehicle along a planned route.

Abstract: A method for accelerating the warming-up of a power unit of a vehicle including an internal combustion engine, the unit needing to undergo a test and/or maintenance operation during which the vehicle remains stationary with its engine running, the unit needing to have achieved a minimum operating temperature prior to the test and/or the operation, the unit including a fuel injection system with a high-pressure pump supplying pressurized fuel to one or more injectors, the pressurizing of the fuel by the pump being controlled according to a combustion configuration that requires a nominal pressure value dependent on operating parameters including an engine speed and engine torque, the method including a step of warming up the unit by maintaining a greatly accelerated idling speed, which is effected at a modified pressure value higher than the nominal pressure value.

Abstract: An exhaust gas recirculation control device for an engine is provided. The device includes an EGR passage connecting an exhaust passage of the engine with an intake passage of the engine, an EGR amount adjustor for adjusting an EGR amount that is a recirculation amount of exhaust gas of the engine through the EGR passage, an adjustor controller for controlling the EGR adjustor to adjust the EGR amount, and a gear position detector for detecting a gear position of a transmission of a vehicle on which the engine is mounted. When the gear position detected by the gear position detector during an idle operation of the engine is a non-travel position, the adjustor controller performs an EGR amount increase control in which the EGR amount adjustor is controlled to increase the EGR amount to be higher than when the gear position is a travel position.

Abstract: The present invention is concerned with an exhaust treatment system and a process for the abatement of noxious pollutants being emitted from a gasoline vehicle. In particular, the present invention is directed to an exhaust system which comprises one or more three-way catalysts (TWC) in a close-coupled (cc) position and an HC-trap/SCR-device in an underfloor (uf) region of the car.

Abstract: A method for controlling exhaust gas aftertreatment in an exhaust gas aftertreatment system having at least one nitrogen oxide storage catalyst and at least one catalyst for selective catalytic reduction is provided, wherein, in phases of a high load, a combustion engine is operated with a substoichiometric fuel/air mixture, and nitrogen oxides in the exhaust gas are reduced in the nitrogen oxide storage catalyst to ammonia, which is stored in the catalyst for selective catalytic reduction, and, when the storage capacity of the catalyst for selective catalytic reduction is exceeded, the combustion engine is operated with a superstoichiometric fuel/air mixture, thus allowing nitrogen oxides in the catalyst for selective catalytic reduction to be reduced by the stored ammonia.

Abstract: Methods and systems are provided for reducing lean air-fuel ratio excursions due to degradation of a port injector while fueling an engine via each of port and direct injection. During a PFDI mode of engine operation, responsive to an indication of port injector degradation, such as due to circuit or injector power issues, intake airflow is limited by reducing the opening of an intake throttle. Air flow is limited to be based only on the direct injected fuel fraction, and independent of the commanded port injected fuel fraction.

Abstract: An oil dilution rate calculation system of an internal combustion engine acquires a blowby gas flow ratio showing the ratio of the flow of blowby gas to the flow of gas to the combustion chamber and an output current of the air-fuel ratio sensor during fuel cut control in which the internal combustion engine stops the feed of fuel to the combustion chamber and at a plurality of points of time of different flows of blowby gas passing through the blowby gas passage and flowing to the downstream side of the throttle valve in the intake passage, and calculate an oil dilution rate based on the acquired blowby gas flow ratio and output current.

Abstract: A system includes an electronic fuel injection system of an engine, the electronic fuel injection system including an electronic governor control unit for controlling various functions of the engine.

Abstract: A method includes forming a combustible mixture by mixing generally homogeneously a first fuel and air and introducing this mixture into a cylinder, compressing the combustible mixture with a piston in a compression stroke, introducing a second fuel into a prechamber at an introduction-time before start of combustion thus creating a prechamber charge, in which the second fuel being of the same or different chemical composition and/or concentration with respect to the first fuel, and spark igniting the prechamber charge. Emission of the cylinder and/or mechanical stress of the cylinder caused by the combustion are monitored. If emissions and/or mechanical stress are above respective predetermined thresholds, individually for the at least one cylinder, the chemical composition and/or the amount of second fuel introduced into the prechamber, and/or temperature of the cylinder charge and/or spark timing, are changed.

Abstract: Systems and methods for operating an engine in response to a condition where air flow into an engine via an air filter of an engine air intake is limited are presented. In one example, a canister purge valve is adjusted responsive to accelerator pedal position to reduce engine torque reduction that may be caused by a partially clogged air filter or lower barometric pressure. In this way, the engine air amount may be adjusted to provide additional torque from an engine while engine air flow through the air filter may be limited.

Abstract: The present invention relates to a method for diagnosing a failure of a power stage of an electronic waste gate actuator (EWGA). According to the present invention, whether the failure of the power stage of the EWGA occurs is determined by confirming, by an engine control unit (ECU), information on the failure of the power stage transferred from an EWGA driver IC at the time of EWGA position learning, after an engine is turned off. By doing so, even when a turbo-charger is not used for a long time, whether the failure of the power stage of the EWGA occurs may be diagnosed for every driving cycle, such that a failure of the ECU may be prevented in advance and unnecessary replacement of components may be prevented, thereby decreasing maintenance costs for a vehicle.

Abstract: A cooling jacket for an engine has upper and lower bodies. The upper body includes a plurality of upper portions. Each upper portion has a top orifice and a bottom orifice. The lower body is located below the upper body and includes a plurality of lower portions. Each lower portion has a lower orifice aligned with a respective one of the bottom orifices so as to permit a coolant to flow through the lower orifice and into the bottom orifice. The coolant flows from that lower portion to the respective one of the upper portions. Each upper portion has at least one upper passageway extending through that upper portion from the bottom orifice to the top orifice so that the coolant entering the upper passageway of that upper portion flows through the upper portion to the top orifice.

Abstract: A piston with an improved bowl geometry includes a piston body having a generally planar crown and a skirt extending from the crown. An oval or multi-lobed bowl rim of a combustion bowl that is recessed in the crown so that the sides of the bowl rim are provided with increased material to resist fatigue along the pin plane, optionally along the thrust/antithrust plane and generally optionally along other planes between the pin plane and the thrust/antithrust plane.

Abstract: A free-piston Stirling engine that limits piston amplitude and reduces engine power as the piston amplitude increases beyond its maximum power. The inward edge of the heat rejecter cylinder port is located outward of the most inward excursion of the inward end of the piston sidewall during a part of the piston's reciprocation cycle so that the heat rejecter cylinder port is entirely covered by the piston sidewall during an inward portion of the piston reciprocation when the engine is operating at the selected maximum engine power. A leaker port extends from a gas bearing cavity through the piston sidewall and is positioned axially outward from the gas bearing pads of the engine's gas bearing system and vents working gas to the engine's back space at a piston amplitude of reciprocation that exceeds the piston's amplitude of reciprocation at maximum engine power. A resilient damping bumper is attached to the outward end of the piston and a displacer gas cushion is disclosed.