Abstract: A controller for an internal combustion engine includes a combustion pressure sensor and a temperature calculator. The combustion pressure sensor has a pressure receiver, a semiconductor device, and a detection circuit. The pressure receiver is arranged in a combustion chamber. The internal pressure applied to the pressure receiver is transmitted to the semiconductor device, and the resistance value of the semiconductor device is changed in accordance with own temperature and own deformation caused by the internal pressure. The detection circuit outputs power in accordance with the pressure applied to the pressure receiver and the temperature of the semiconductor device. The temperature calculator calculates a temperature of the combustion chamber based on an output of the detection circuit at the time when a combustion pressure is not acting on the pressure receiver.

Abstract: A ship engine includes a first turbocharger, a first intercooler, a second turbocharger, and a second intercooler. The first turbocharger is arranged at one end of the ship engine with respect to a crank axis direction. The first intercooler and the second turbocharger are arranged in an end portion of the ship engine with respect to a device width direction. The first intercooler and the second turbocharger are arranged side by side in the crank axis direction. The second intercooler is arranged at the other end (at the side opposite to the side where the first turbocharger is arranged) of the ship engine with respect to the crank axis direction.

Abstract: An improved turbocompound system, in particular in the field of industrial vehicles. A first turbine drives a fresh air compressor. A power turbine is arranged downstream of the first turbine and operatively coupled with the crankshaft of the engine through a clutch. A first electric motor/generator is operatively coupled with the turbocharger system. A second electric motor/generator is operatively coupled with the power turbine. The first and second electric motor/generators are electrically interconnected, and controlled as a motor or a generator in an opposite way with respect to each other, so that the electric energy produced by one is consumed by the other and vice versa.

Abstract: A sealing-coupled apparatus of a turbocharger may include a vane cover installed in front of a turbine vane set in a turbine housing, the vane cover configured to cover the turbine vane and to define a fluid passage through which a fluid may be fed to an outlet hole extending in the turbine housing, and a sealing member having a tubular shape with a predetermined thickness, the sealing member being engaged with a front end of the vane cover and having an annular groove formed around an outer circumferential surface of the sealing member, with a sealing ring fitted over the groove and spacing the vane cover apart from the turbine housing in a radial direction.

Abstract: In an adjustable guide vane mechanism for a turbine, comprising a bearing ring with a plurality of guide vanes rotatably supported on the bearing ring by means of guide vane shafts provided with actuating levers which are engaged by a rotatable ring, the rotatable ring comprises axially spaced radial inner and outer sections with a radially inclined center section joining the spaced radial inner and outer sections, the radially inner section being rotatably supported and the radially outer section extending around the actuating levers and having recesses in which the actuating levers are received for pivoting the actuating levers and the guide vanes upon rotation of the rotatable ring.

Abstract: When opening or closing an exhaust cut valve in accordance with an operation range of an engine and performing feedback control for an opening degree of a wastegate valve such that a target supercharging pressure is achieved in each of an open operation range where the exhaust cut valve is opened and a closed operation range where the exhaust cut valve is closed, a failure of the exhaust cut valve can be accurately determined. Whether or not an abnormal state occurs is determined in each range. In the abnormal state, although feedback control for closing the wastegate valve is performed, the actual supercharging pressure is lower than the target supercharging pressure, and a deviation between the actual supercharging pressure and the target supercharging pressure is maintained at not less than a predetermined value. Further, whether the exhaust cut valve is normal or in failure is determined.

Abstract: A rotary engine that includes at least two sets of baffles that are arranged between a cylinder body and a rotor, and are in seal fit with the inner wall of the cylinder body to form at least two sealed cavities in the cylinder body; at least one set of the baffle is a movable baffle, and can rotate around the center of the cylinder body; a one-way rotation mechanism is arranged between the movable baffle and the rotor, and drives the rotor to rotate in one direction. The rotary engine has the benefits that the sealed cavities are formed by the movable baffle and the cylinder body; four working strokes including air suction, compression, ignition and exhaust are carried out in each sealed cavity; the movable baffle rotates under acting and counter-acting forces, drives the one-way rotation mechanism to rotate, and then drives the rotor to rotate.

Abstract: A reciprocating internal combustion engine includes at least one piston, which is operatively connected by two connecting rods having two crankshafts rotating in opposite directions and running parallel to each other, which crankshafts are oriented in an upright manner to a horizontal water line of a boat, and an internal combustion engine housing of the internal combustion engine is composed of at least a cylinder crank housing and a cylinder head, having inlet and outlet valves, and is bounded by an upper end face and a bottom end face.

Abstract: An arrangement and method for maintaining an alignment of an internal combustion engine by utilizing an arrangement includes a number of fluid springs by means of which the engine is mounted on a foundation thereof, control valves arranged in communication with each fluid spring, at least three position sensors in communication with the engine, and an electronic control unit. The electric control unit is provided with preset engine position values. The method includes collecting engine position information to the electric control unit, comparing the position information to preset position values, determining, if the position information differs from the preset position values, such control valves that need to be operated, calculating the corrective measures, and giving corrective instructions to the control valves.

Abstract: One embodiment of the present invention is a unique engine. Another embodiment of the present invention is a unique combustion system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for engines and combustion systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.

Abstract: A system for processing greenhouse gases including a collection subsystem configured to collect a gaseous mixture including carbon dioxide and methane, a combustion subsystem configured to combust the methane in the gaseous mixture and output a gaseous combustion effluent, wherein the combustion subsystem generates electrical energy, water and additional quantities of carbon dioxide, and a separation subsystem configured to separate the carbon dioxide from the gaseous combustion effluent.

Abstract: This power generation system is provided with: a gas turbine (11) having a compressor (21), a combustor (22) and a turbine (23); a first compressed air supply line (26) that supplies compressed air, which has been compressed by the compressor (21), to the combustor (22); a solid oxide fuel cell (SOFC) (13) having an air electrode and a fuel electrode; a compressed air supply device (61) capable of generating compressed air; and a second compressed air supply line (31) that supplies compressed air, which has been compressed by the compressed air supply device (61) to the SOFC (13). The fuel cell can thus be stably operated regardless of the operating state of the gas turbine.

Abstract: The present invention discloses a novel apparatus and methods for augmenting the power of a gas turbine engine, improving gas turbine engine operation, and reducing the response time necessary to meet changing demands of an electrical grid. Improvements in power augmentation and engine operation include systems and methods for providing rapid response given a change in electrical grid.

Abstract: An inlet apparatus for a gas turbine engine includes: a fan duct adapted to surround at least one row of rotating fan blades, the fan duct having a circular frontal area, and defining a first inlet plane; and an outer duct surrounding the fan duct, the outer duct including: a first frontal area shape at the first inlet plane which defines, cooperatively with an exterior of the fan duct, at least one lobe through which air can pass; and a second frontal area shape at a second inlet plane located axially downstream from the forward end which is circular, and which defines, cooperatively with an exterior of the fan duct, an annulus through which air can pass.

Abstract: Splitter apparatus for gas turbine engines are disclosed. An example splitter apparatus may include a splitter including an annular outer wall substantially defining a convex leading edge; an annular splitter support positioned radially within the outer and including a forward end disposed substantially against a splitter inner; and an annular first bulkhead spanning between the outer wall and the splitter support. The outer wall, the splitter support, and the first bulkhead may define a generally annular splitter plenum. The forward end of the splitter support may include spaced apart, radially oriented metering slots. The outer wall may include an inner portion disposed radially inward from the splitter inner surface extending aft and including spaced-apart exit slots. The splitter plenum, the metering slots, and the exit slots may conduct airflow from the plenum, through the metering slots against the splitter inner surface, and through the exit slots.

Abstract: Systems and methods for adjusting airflow distortion in a gas turbine engine using a secondary airflow passage assembly are disclosed. A gas turbine engine can include a compressor section, a combustion section, and a turbine section in series flow and defining at least in part an engine airflow path. A casing can enclose the gas turbine engine and be at least partially exposed to a bypass airflow. The gas turbine engine can further include a secondary airflow passage assembly comprising a door and a duct, the duct defining an inlet located on the casing, the duct defining an outlet in airflow communication with the engine airflow path, the duct comprising an airflow passage extending between the inlet and outlet. The door can be moveable between an open and closed position to allow a portion of the bypass airflow to flow through the airflow passage to adjust airflow distortion.

Abstract: A tangential on-board injector assembly for a gas turbine engine includes an annular housing including a plenum. A plurality of discrete tubes is fluidly connected to the plenum and is configured to provide a cooling fluid to the annular housing.

Abstract: An engine component includes a hot surface in thermal communication with a hot combustion gas flow, and a cooling surface, opposite the hot surface, along which a cooling fluid flows. At least one vortex generator is provided on the cooling surface, and can induce a vortex in the cooling fluid in response to contact with the flowing cooling fluid.

Abstract: A turbine case cooling system including a turbine assembly having an inlet and an outlet and surrounded by a turbine casing. The turbine case cooling system is arranged to selectively impingement cool at least part of the turbine casing. The system includes an annular structure that is radially spaced from the turbine casing and includes a downstream end. The system includes an annular duct that is spaced radially outwardly from the turbine casing and radially inwardly from the annular structure. The duct is sealingly coupled to the turbine casing at a first end towards the turbine inlet, and a second end extends axially towards the downstream end of the annular structure and the turbine outlet.

Abstract: The fuel flow rate to a gas turbine is measured using an inert gas. The inert gas is injected into the fuel flow and the concentration of the inert gas in the fuel/inert gas mixture is later measured. The concentration of the inert gas in the fuel/inert gas mixture is then used to calculate the mass flow rate of the fuel.

Abstract: A turbine system includes a compressor system compressing a fluid, a combustor system fluidly coupled to the compressor to combust a fuel mixed with the fluid to produce a combusted fluid, a gas turbine system fluidly coupled to the combustor to rotate a gas turbine shaft based on the combusted fluid, a power turbine system fluidly coupled to the gas turbine to rotate a power turbine shaft based on the combusted fluid existing the gas turbine, the shaft mechanically coupled to a clutch system, a clutch system mechanically coupled to a generator shaft, and an electric generator having the generator shaft to produce electricity based on rotations of the generator shaft. The turbine system includes a controller operatively coupled to the clutch system to restart production of the electricity via the clutch system.

Abstract: A turbine engine assembly includes a turbine engine case, a gearbox and a plurality of mounts connecting the gearbox to the case. Each of the mounts includes a linkage and a fuse joint. The linkage extends towards the case substantially in a first direction. The fuse joint is configured to substantially prevent movement between the gearbox and the case when the fuse joint is subject to loading less than a threshold, and to permit a constrained movement between the gearbox and the case when the loading is greater than the threshold. The fuse joint of a first of the mounts has a different configuration than the fuse joint of a second of the mounts.

Abstract: A centrifugal compressor for a turbocharger includes an inlet-adjustment mechanism in an air inlet for the compressor, operable to move between an open position and a closed position in the air inlet. The inlet-adjustment mechanism includes an axially elongated ring. In the open position, the radially outer surface of the ring is spaced from a tapering inner surface of the air inlet so that air can flow in an annular passage between the tapering surface and the ring. In the closed position, the ring abuts the tapering surface to close off the annular passage, whereby the effective inlet diameter is then defined by the inner diameter of the ring at its trailing edge. Movement of the inlet-adjustment mechanism from the open position to the closed position is effective to shift the compressor's surge line to lower flow rates.

Abstract: A gas turbine system includes a compressor. The compressor has a plurality of inlet guide vanes disposed at an inlet of the compressor. Furthermore, the compressor may have at least one unison ring coupled to a plurality of variable stator vanes disposed between the inlet and an outlet of the compressor. The gas turbine system includes a first actuator that may adjust a first pitch of the plurality of inlet guide vanes and a second actuator that may adjust a second pitch of the plurality of variable stator vanes. A first electric motor may drive the first actuator, while a second electric motor may drive the second actuator.

Abstract: A method and system for a turbofan gas turbine engine system is provided. The gas turbine engine system includes a variable pitch fan (VPF) assembly coupled to a first rotatable shaft and a low pressure compressor LPC coupled to a second rotatable shaft. The LPC including a plurality of variable pitch stator vanes interdigitated with rows of blades of a rotor of the LPC. The gas turbine engine system also includes a speed reduction device coupled to said first rotatable shaft and said second rotatable shaft. The gas turbine engine system further includes a modulating pressure relief valve positioned between an outlet of said LPC and a bypass duct and a controller configured to schedule a position of said plurality of variable pitch stator vanes and said modulating pressure relief valve in response to an operational state of said turbofan gas turbine engine system and a temperature associated with said LPC.

Abstract: An actuator system mounted to a gas turbine engine that communicates mechanical power for positioning variable guide vanes within the gas turbine engine. The actuator system includes a torque box having components for communicating mechanical power to the variable guide vanes for positioning the vanes and an actuator mechanically coupled to provide mechanical power to the components of the torque box used to communicate the provided mechanical power to the inlet guide vanes. The actuator is mounted to the torque box via an elongate fastener extending in one direction and another elongate fastener extending in another direction.

Abstract: A fuel metering unit including a movable element including at least one fuel passage section opening upstream towards a fuel supply conduit and opening downstream towards a conduit of use through a metering slot with a flared profile having a narrow passage section flaring as far as a wide passage section, the movable element being able to be moved with respect to a fixed element between a low flow rate position in which the metering slot is for a large part obstructed and a high flow rate position in which the metering slot is for a large part exposed, the metering slot being made in the fixed element or in the movable element and its obstruction being obtained by covering the slot with a wall of the movable element or of the fixed element.

Abstract: An internal combustion engine, a method of operating the internal combustion engine, and a controller are disclosed. The method may comprise measuring a first pressure at a first position in a fluid line containing pressurized fluid; comparing the first pressure to a first threshold; in response to the first pressure exceeding the first threshold, transmitting a signal to depressurize the fluid line; after transmitting the signal to depressurize the fluid line, measuring a second pressure in the fluid line and comparing the second pressure to at least one of a second threshold and a third threshold, the second threshold being greater than the third threshold and less than the first threshold; and in response to the second pressure being less than the second threshold and exceeding the third threshold, transmitting another signal to depressurize the fluid line.

Abstract: A method for operating an engine, comprising port injecting a first quantity of a first gaseous fuel in a cylinder cycle and direct injecting a second quantity of a secondary injectant in the cylinder cycle as a function of a desired air-to-fuel ratio (AFR), the desired AFR based on a temperature of an engine cylinder valve. The desired AFR may be outside the AFR range available during natural gas combustion alone and thus allows for cooler engine operation.

Abstract: A method for controlling a creep torque of a motor-driven vehicle includes a gradient calculating step of calculating a gradient of a traveling road, and a time constant calculating step of calculating a time constant of a filter using the gradient, a preset basic creep torque, and a sliding speed limiting value. A variable controlling step substitutes the calculated time constant for the time constant of the filter, inputs the basic creep torque to the filter, and controls the motor using a torque value output from the filter as a demanded torque.

Abstract: An electronic controller controls a drive of a vehicle that uses an internal combustion engine and an electric motor as a driving source. The electronic controller includes a travelling distance calculation portion, a diagnosis portion, and a control portion. The travelling distance calculation portion calculates a travelling distance where the vehicle can travel by using the electric motor as the driving source, based on a power surplus quantity of a battery that supplies electric power to the electric motor. The diagnosis portion diagnoses a diagnosis object included in the internal combustion engine. The control portion controls the internal combustion engine. When a condition that the travelling distance is shorter than or equal to a threshold distance that is predetermined is satisfied, the control portion forcibly drives the diagnosis object and controls the diagnosis portion to execute a malfunction diagnosis of the diagnosis object.

Abstract: In an alcohol concentration estimation apparatus for an engine, a first crank angular speed (?1) within a first predetermined interval overlapping with the compression top dead center is calculated, and a first variation amount (??1) is calculated by subtracting ?1 from an average engine speed. A second crank angular speed (?2) within a second predetermined interval overlapping with the combustion bottom dead center is calculated, and a second variation amount (??2) is calculated by subtracting ?1 from ?2. In a relationship between air fuel ratio A/F and an indicated mean effective pressure (IMEP)/charging efficiency (?c) of the engine when the engine is operated with a predetermined fuel injection map indicating a relationship between A/F and IMEP/?c for each desired alcohol concentration, IMEP/?c is substituted by ??2/??1 ratio to estimate an alcohol concentration in fuel. The alcohol concentration estimation apparatus eliminates requirement of sensors for detecting an intake air mass.

Abstract: The present disclosure relates to a system for controlling vibration of an engine including an engine inertia portion which rotates together with the engine and a sub-inertia portion which influences a rotation speed of the engine and is separately provided, and a damper which is disposed between the engine inertia portion and the sub-inertia portion for reducing a vibration. The present disclosure includes: determining whether a vehicle is in an idle state; sensing rotation speeds of the engine inertia portion and the sub-inertia portion, respectively; calculating an average value of the rotation speeds of the engine inertia portion and the sub-inertia portion; calculating an error value from the average value; and PI controlling by receiving the error value.

Abstract: A method and apparatus for continually and rapidly adjusting the output torque of an engine according to a torque demand uses an active tappet to vary the instant air charge in a combustion chamber, so as to modulate engine torque during an automatic change of speed ratio. The invention allows substantially efficient combustion throughout the engine operating map. Various methods of changing the charge of air are disclosed.

Abstract: A driver inducement method and a driver inducement system for a vehicle that induce a driver to replenish a urea considering a urea level in a urea tank and an actual vehicle speed are disclosed. The driver inducement method may include: calculating a first residual travel distance according to a urea level and an average urea consumption if an engine is started; calculating a final residual travel distance based on the first residual travel distance according to the urea level and the average urea consumption and a second residual travel distance according to the urea level and a vehicle speed, if the first residual travel distance according to the urea level and the average urea consumption is smaller than a threshold distance; and limiting an engine output according to the final residual travel distance.

Abstract: Embodiments for controlling exhaust gas turbines are provided. In one embodiment, a method for controlling a turbocharger arrangement of an internal combustion engine, the turbocharger arrangement having at least a first exhaust-gas turbine and a second exhaust-gas turbine arranged downstream of the first, and an exhaust-gas aftertreatment system being arranged downstream of the second exhaust-gas turbine comprises, in a warm-up mode, controlling at least one exhaust-gas turbine so as to increase an inlet temperature of an exhaust-gas flow at the inlet into the exhaust-gas aftertreatment system. In this way, the exhaust-gas aftertreatment system may be rapidly heated.

Abstract: A method for controlling a vehicle including an exhaust aftertreatment system for purifying exhaust gases from a compression-ignition engine includes monitoring vehicle operating parameters, determining whether the vehicle is stopped, determining whether the engine is commanded off, and determining whether the exhaust aftertreatment device is at a predetermined operating temperature. When the vehicle is stopped, the engine is commanded off and the exhaust aftertreatment device is at the predetermined operating temperature the engine is controlled in a run-on state for a predetermined period of time. The run-on state includes operating the engine in a throttled and fueled state.

Abstract: A method for setting an engine speed of an internal combustion engine in a marine propulsion device of a marine propulsion system to an engine speed setpoint includes determining the engine speed setpoint based on an operator demand and predicting a position of a throttle valve that is needed to achieve the engine speed setpoint. The method also includes determining a feed forward signal that will move the throttle valve to the predicted position, and after moving the throttle valve to the predicted position, adjusting the engine speed with a feedback controller so as to obtain the engine speed setpoint. An operating state of the marine propulsion system is also determined. Depending on the operating state, the method may include determining limits on an authority of the feedback controller to adjust the engine speed and/or determining whether the operator demand should be modified prior to determining the engine speed setpoint.

Abstract: A method for intelligent active engine braking using full authority active fuel management based on vehicle speed and brake pedal position. The method includes determining if the tow mode of the vehicle has been selected and enables all engine cylinders to ensure maximum engine braking capacity is available. When vehicle tow mode is not selected then the method varies engine braking capacity by disabling one or more cylinders based on the vehicle speed and brake pedal position.

Abstract: An internal combustion engine includes an air charging system. A method to control the air charging system includes providing a desired operating target command for the air charging system, and monitoring operating parameters of the air charging system. An error between the desired operating target command for the air charging system and the corresponding one of said operating parameters of the air charging system is determined, and scheduled PID gains are determined based on the error utilizing a PID controller. An adaptive algorithm is applied to modify the scheduled PID gains, and a system control command for the air charging system is determined based upon the modified scheduled PID gains. The air charging system is controlled based upon the system control command for the air charging system.

Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the firing fractions during transitions such that the resulting changes in the firing fraction better track cylinder air charge changing dynamics associated with the transition.

Abstract: A control device of an internal combustion engine calculates on the basis of the air-fuel ratio difference a correction for the estimated fuel supply amount correction for correcting the estimated fuel supply amount to make the estimated and detected air-fuel ratios correspond to each other and calculates correction values for the fuel supply difference compensation and the air amount detection difference compensation by dividing the correction value for the estimated fuel supply amount correction, using the fuel supply and air amount detection difference proportions, and performing the air-fuel ratio control, using the corrected estimated fuel supply and detected air amounts.

Abstract: A method for parameter estimation in an electromagnetic actuator having an electrical coil and an armature includes applying a voltage pulse to the electrical coil of the actuator prior to an actuator event and of sufficient duration to ensure that a resulting electrical current achieves steady state. At least one parameter of the actuator is estimated based upon the voltage pulse and the steady state current.

Abstract: At least an embodiment may provide a remote server that can predict overheating of an engine. A remote server may receives an engine rotational speed, an engine load factor, and a cooling-water temperature. The remote server calculates a moving average of the engine load factor during a predetermine time, and calculates a correlation between the moving average of the engine load factor and the cooling-water temperature. If the correlation during a predetermined period is in the status of a predetermined difference from the correlation up to the predetermined period, the remote server predicts occurrence of overheating in a swing working vehicle that is used by a user.

Abstract: A method for operating a fuel delivery device of an internal combustion engine includes switching an electromagnetic actuating device of a volume control valve so as to set a delivery volume. An intensity of an energy that is supplied to the electromagnetic actuating device for switching purposes, in particular of a current supplied to the electromagnetic actuating device and/or a level of a voltage applied to the electromagnetic actuating device, depends at least intermittently on a rotational speed of the internal combustion engine.

Abstract: A method for controlling an internal combustion engine provides that the internal combustion engine is operated based on a first injection pattern in a first operating state, and based on a second injection pattern in a second operating state. At least one parameter of the injection patterns in the transition from the first to the second operating state is selected in such a way that the noise emission remains constant. In the transition to the injection pattern having greater noise, first the at least one parameter of the first injection pattern is varied, whereupon the switchover takes place. In the transition to the injection pattern having the lower noise, first the switchover is implemented, whereupon the at least one parameter of the second injection pattern is varied.

Abstract: A method for controlling fuel injection of a combustion engine and a corresponding system includes providing at least a first predetermined air-fuel mixture map and determining a first air-fuel ratio based on at least one engine operating parameter and the at least first predetermined air-fuel mixture map; determining a second air-fuel ratio that is offset with a first constant value from the first air-fuel ratio, determining if a first operating mode or a second operating mode is selected; controlling engine fuel injection according to the first air-fuel ratio when a currently requested fueling rate results in a smaller air-fuel ratio than the first air-fuel ratio and the first operating mode is selected; or alternatively controlling engine fuel injection according to the second air-fuel ratio when a currently requested fueling rate results in a smaller air-fuel ratio than the second air-fuel ratio and the second operating mode is selected.

Abstract: An electronic control unit provided in an internal combustion engine detects a degree of inter-cylinder variation of the amount of fuel that is injected from a port injector, and a degree of inter-cylinder variation of the amount of fuel that is injected from an in-cylinder injector. In a case where the inter-cylinder variation of one of the port injector and the in-cylinder injector is equal to or greater than a predefined value, a process is executed of limiting, so as not to exceed an upper limit value, an injection proportion of the injector for which the inter-cylinder variation is equal to or greater than the predefined value. This upper limit value is set to be smaller as the degree of inter-cylinder variation of the injector, for which the inter-cylinder variation is equal to or greater than a predefined value, increases.

Abstract: A fuel injection control system for an internal combustion engine includes a plurality of first energy storage elements each for supplying a high voltage to a fuel injection solenoid valve, boosting circuits each for boosting a battery voltage and electrically charging one of the first energy storage elements, a second energy storage element for accumulating electrical energy of the battery voltage, and a switching circuit for transferring the electrical energy between the plurality of first energy storage elements via the second energy storage element. This configuration enables the fuel injection control system for an internal combustion engine to implement stabilized supply of a fuel by obtaining within a short time the high voltage needed to operate the fuel injector both accurately and reliably, and to contribute to cost reduction by, for example, alleviating capability requirements and part performance requirements of the individual boosting circuits.

Abstract: A piston for internal combustion diesel engine having a piston diameter of 180 to 650 mm, includes a top part and a body part connectable to each other, the top part defining, when installed in a cylinder of the engine, the piston side of a combustion chamber, and the body part having an aperture for a gudgeon pin, bosses for distributing forces, when in use, between the piston and the gudgeon pin, the body part having an interior, an outer surface and operable connecting surfaces. The interior of the body part includes an interior wall having a macro geometry of wavy surface, where a wave has a length of 3 to 25 mm and a height of 0.3 to 3 mm, the wavy surface having a micro geometry measurable as a surface roughness of 5 to 9 ?m.