Abstract: A five-spindle engine system having a stable center of gravity that operates without oil lubrication, an opposed-piston four-cylinder, two-stroke combustion engine, a double-acting opposed-piston pressure-gradient drive, a multi-rotor/multi-stator/multi-phase disk generator/disk motor including windings printed on printed circuit boards, and/or a heat pump may be integrated in the system and housed in a common sealed housing.

Abstract: An engine trigger wheel is disclosed having a central annular portion and a cylindrical rim portion defining a number of trigger teeth, wherein the central annular and cylindrical rim portions are pressed from a single piece of metal. A number of balance apertures are formed in the central annular portion to move a center of mass of the trigger wheel away from an axis of rotation. The engine trigger wheel when fastened to one end of a crankshaft of an engine provides both an indication of the angular position of the crankshaft and a counterweight function.

Abstract: In the exhaust gas control system, the electronic control unit is configured to execute first air-fuel ratio control for controlling an air-fuel ratio of an air-fuel mixture in a part of cylinders to a lean air-fuel ratio and controlling an air-fuel ratio of an air-fuel mixture in the other part of the cylinders to a rich air-fuel ratio is executed. The electronic control unit is configured to execute second air-fuel ratio control to perform malfunction diagnosis. The electronic control unit is configured to execute second air-fuel ratio control when the execution of the first air-fuel ratio control is interrupted after the temperature of the three-way catalyst becomes equal to or higher than the diagnosis temperature.

Abstract: A cylinder head containing an exhaust system manifold for an engine includes screw holes formed through a fastening face of the cylinder head and an exhaust pipe, and outlet cooling channels that are provided adjacent to an outlet of a confluence of the manifold, and are disposed between the screw holes and the outlet. Coolant flows through the outlet cooling channels.

Abstract: An in-cylinder pressure detecting apparatus for detecting a pressure in a combustion chamber of an internal combustion engine is provided. The in-cylinder pressure detecting apparatus comprises a pressure detecting element mounted on a tip-portion of a fuel injection device which injects fuel into the combustion chamber, and an amplifying circuit unit having an amplifying circuit which amplifies a signal output from the pressure detecting element and outputs a pressure detection signal. An in-cylinder pressure detecting unit integrated fuel injection device is configured by integrating an in-cylinder pressure detecting unit with the fuel injection device. The in-cylinder pressure detecting unit includes the pressure detecting element, the amplifying circuit unit, and a connecting member connecting the pressure detecting element with the amplifying circuit unit. The in-cylinder pressure detecting unit integrated fuel injection device is mounted on the internal combustion engine.

Abstract: The present disclosure provides a split cooling apparatus for an internal combustion engine, the apparatus including: a base inserted into a water jacket of a cylinder block, the base surrounding an outside of a cylinder along a shape of the cylinder; an insertion groove formed on the base by being depressed into an inner surface of the base; and a sealing member inserted into the insertion groove, wherein when a temperature of cooling water supplied into the water jacket reaches a preset temperature or higher, the sealing member expands so as to close a flow passage between the base and the cylinder, thereby increasing flow resistance of the cooling water and thus reducing a heat transfer rate of the cylinder.

Abstract: A controller for an internal combustion engine is configured, when the speed of combustion of a fuel in a cylinder changes as the property of the fuel injected from a fuel injection valve changes, to change a combustion limit excess air ratio that is a target value of a fuel injection amount feedforward control according to a first relationship that the combustion limit excess air ratio increases as the speed of combustion of the fuel in the cylinder increases. The controller is also configured, when the speed of combustion of the fuel in the cylinder changes as the property of the fuel injected from the fuel injection valve changes, to change the value of a combustion limit combustion speed parameter that is the target value of a fuel injection amount feedback control according to a second relationship that the speed of combustion of the fuel in the cylinder corresponding to a combustion limit increases as the speed of combustion of the fuel in the cylinder increases.

Abstract: A peripheral wall portion of a piston is provided with a through hole penetrating through the peripheral wall portion. A cylinder is provided with a scavenging passage having a first opening being open in a bore surface and configured to make a bore section and a crank chamber communicate with each other and is provided with a communication passage having a second opening being open in the bore surface on the other side with respect to the first opening and configured to make the bore section and the scavenging passage communicate with each other. The cylinder and piston are configured so that the through hole overlaps the second opening to communicate with the communication passage in a partial interval of a scavenging stroke in which the first opening becomes open in the bore surface on one side of the piston with reciprocal motion of the piston.

Abstract: A split cooling system of an internal combustion engine may include a water pump configured to circulate cooling water; a cylinder head and a cylinder block configured to be supplied with the cooling water from the water pump; an integrated flow control valve configured to include an inlet provided to be supplied with the cooling water of the cylinder head and a plurality of valves that are configured to be opened or closed to distribute the cooling water introduced through the inlet to an oil heat exchanger, a heater core, and a radiator; and a split cooler configured to be mounted at the cylinder block to provide a split cooling channel in the cylinder block and the cylinder header.

Abstract: A water jacket having a coolant flow crossing the space over the cylinder head is provided for an internal combustion engine of an automotive system. The internal combustion engine is equipped with a cylinder and a cylinder head. The water jacket includes a lower water jacket having side passages surrounding the cylinder and connected together by a plurality of branches disposed over the cylinder head, so as to create the coolant flow crossing the space over the cylinder head.

Abstract: In a breather device for an internal combustion engine for guiding blow-by gas generated in a crank chamber to an intake system, the breather device includes: a breather chamber formed adjacent to the crank chamber such that the breather chamber communicates with the crank chamber, the breather chamber being configured to separate oil from the blow-by gas that flows in the breather chamber from the crank chamber; a filter chamber formed adjacent to the crank chamber such that the filter chamber communicates with the breather chamber, the filter chamber accommodating a filter for separating oil from the blow-by gas that flows in the filter chamber from the breather chamber; and a breather passage that communicates the filter chamber and the intake system with each other.

Abstract: A breather apparatus for an engine includes a breather chamber, one side portion and other side portion of the breather chamber, and a bottom face of the other side portion. The breather chamber is formed, along substantially half a circumference of a cylinder bore, in a cylinder block. The one side portion of the breather chamber is provided with a blow-by gas introduction hole leading blow-by gas in the crank chamber to the breather chamber and a one-way valve opening and closing the blow-by gas introduction hole. The other side portion of the breather chamber has a pipe connection hole connecting a breather pipe to the breather chamber and with a breather oil return passage. The bottom face of the other side portion projects into the crank chamber to a level lower than a bottom face of the one side portion.

Abstract: An injector for a fuel supply system of an internal combustion engine, namely for a common rail fuel supply system of an internal combustion engine which is formed in particular as a large diesel internal combustion engine or ship's diesel internal combustion engine, having an injection nozzle, a control valve and a retaining body. The injection nozzle and the control valve form a clamped composite, and the composite formed of the injection nozzle and control valve can be mounted on the retaining body as a unit and disassembled from the retaining body as a unit.

Abstract: Methods and systems are provided for coordinating water usage with spark usage based on the effect on an engine torque ratio. Water is injected based on torque ratio at a current spark timing relative to torque ratio at borderline knock to improve the impact of the water injection on the engine performance. Manifold water injection and direct water injected are coordinated based on intake manifold humidity.

Abstract: A fuel heating device for a vehicle may include a start sensor detecting a starting of a vehicle; a controller area network (CAN) communication device transmitting and receiving various signals to and from an engine control device; a resistance sensor measuring a resistance of a heater provided inside an injector; and a controller controlling the resistance sensor to measure the resistance of the heater when the starting of the vehicle is detected in a state in which a failure occurs in the CAN communication device, converting the measured resistance of the heater into a temperature of a fuel, and operating the heater to heat the fuel to a reference temperature when the converted temperature is lower than or equal to a threshold.

Abstract: Methods and systems are providing for improving zero flow lubrication (ZFL) of a high pressure fuel pump coupled to direct fuel injectors via a direct injection fuel rail. A ZFL transfer function for the fuel pump is learned while fuel is at non-nominal fuel bulk modulus conditions and corrected for variations from a nominal fuel bulk modulus estimate. When zero flow lubrication of the pump is requested, the pump is operated with a duty cycle based on the learned transfer function and an instantaneous estimate of the fuel bulk modulus to compensate for differences in fuel condition from the nominal fuel bulk modulus estimate.

Abstract: An engine system having a coolant control valve device may include valves that distribute coolant that is injected into a coolant inflow chamber to coolant demand elements, respectively; a driver that operates each of the valves; a safety valve that bypasses coolant that is operated by a coolant temperature to be injected into the coolant inflow chamber; and a degassing member that collects coolant including a bubble, wherein a degassing passage that is opened or closed by operation of the safety valve is formed.

Abstract: An internal combustion engine includes: a cylinder block in which a cylinder is formed; a cylinder head including an intake port and an exhaust port, the cylinder head being integrally formed with the cylinder block; a water jacket covering circumferences of the cylinder, the intake port, and the exhaust port; a partition wall dividing the water jacket into a cylinder block side and a cylinder head side; and a knock sensor mounting boss provided on a side surface of the internal combustion engine, at a position on an extension line of the partition wall.

Abstract: The invention relates to a power unit, in particular for a hybrid vehicle, comprising a reciprocating piston engine and comprising a generator which can be in driving engagement therewith, wherein the reciprocating piston engine has at least two pistons, which are guided in at least two cylinders in tandem arrangement, and two counter-rotating crankshafts, which are connected to the pistons by connecting rods and which are mechanically coupled so as to be in phase, wherein a first generator can be driven by the first crankshaft and a second generator can be driven by the second crankshaft.

Abstract: An internal combustion engine includes a crankshaft rotatably supported by an engine block, and rotatable about a crank axis. A control shaft is rotatably supported by the engine block, and rotatable about a control axis. A link rod is rotatably connected to the crankshaft. A lower connecting rod includes a first end rotatably connected to the link rod, and a second end rotatably connected to the control shaft. An upper connecting rod is rotatably connected to the link rod and a piston. The second end of the lower connecting rod and the control shaft are rotatably connected at a location offset from the control axis to define an eccentric connection relative to the control axis. Rotation of the control shaft about the control axis rotates the second end of the lower connecting rod about the control axis to adjust a compression stroke length of the piston.