An assembling structure for an intake manifold includes: a first downstream portion; a second downstream portion; an upstream portion; a connecting member that connects the first downstream portion and the second downstream portion with each other; and a plate-shaped stay. The connecting member is fixed to the first downstream portion and the second downstream portion by a bolt, and an other member that is a member other than the intake manifold is fixed to the intake manifold through the stay at least either between the connecting member and the first downstream portion, or between the connecting member and the second downstream portion.

Systems, apparatus, and methods are disclosed that include a divided exhaust engine with at least one pair of primary EGR cylinders and a plurality of pairs of non-primary EGR cylinders. The pair of primary EGR cylinders can be connected to an intake with an EGR system that lacks an EGR cooler. In another embodiment, the cylinder pairs include exhaust flow paths that join in the cylinder head to form a common exhaust outlet for each cylinder pair in the cylinder head that is connected directly to the EGR system or to the exhaust system without an exhaust manifold.

Method, system, and computer program product are provided for determining pressure in a fuel accumulator tank of a multi cylinder internal combustion engine during operation. Pressurized fuel is distributed from said accumulator tank to the cylinders by fuel injectors. A pump unit provides pressurized fuel to said accumulator tank by pump actions comprising pump strokes. The method comprises: performing pressure sampling of pressure in the fuel accumulator tank based upon a relationship between the number of pump strokes and a number of injections per crank shaft revolution such that pressure sampling occurs in connection to a fuel injection where the mutual relationship between that fuel injection and the pump action reoccurs at the fuel injection for which a pressure is to be determined; and determining a pressure in the fuel accumulator tank based upon the pressure sampling in connection to at least one earlier fuel injection, for controlling fuel injection to an individual cylinder.

An internal combustion engine includes: an engine body; an exhaust pipe fastened to the engine body; an engine body cooling water passage provided in the engine body and having a cooling water injection port and a cooling water discharge port; an exhaust pipe cooling water passage provided in the exhaust pipe; a supply passage that connects the engine body cooling water passage with the exhaust pipe cooling water passage such that cooling water flows from the engine body cooling water passage to the exhaust pipe cooling water passage through the supply passage; and a return passage that connects the engine body cooling water passage with the exhaust pipe cooling water passage such that the cooling water flows from the exhaust pipe cooling water passage to the engine body cooling water passage through the return passage.

Provided herein is a control system for a vehicle. The control system includes an engine including cylinders, each of the cylinders including a fuel injector associated therewith, a vehicle exhaust system coupled in fluid communication with the engine for receiving exhaust gas therefrom, a sensor coupled to the vehicle exhaust system to detect an air-to-fuel ratio of the exhaust gas, and an engine electronic control unit (ECU) communicatively coupled to the sensor and the fuel injector of each cylinder, the ECU including memory and a processor. The ECU is configured to store a sequence of operating states of the cylinders, determine, based on the stored sequence of operating states, expected air-to-fuel ratio (ATFR) value data, receive, from the sensor, actual air-to-fuel ratio (ATFR) value data, determine a difference between the expected and actual ATFR value data, and control operation of the fuel injector based on the determined difference.

A modularized multifunctional variable valve actuation system for use in a six-cylinder internal combustion engine. The system includes two fuel supply modules that cooperate with two two-way two-position valves for implementing a continuously variable valve event, and that cooperate with two three-way two-position valves and one two-way two-position valve for implementing a fully variable valve event.

A variable geometry turbine having a wastegate, which meets the requirements of EGR circulation, includes a turbine housing and a power turbine. The turbine housing is provided with an inner intake gas flow channel and an outer intake gas flow channel which is configured to guide exhaust gas of an engine to the power turbine for driving the power turbine to rotate. The turbine housing is further provided with a wastegate pipeline configured to discharge the exhaust gas without passing through the power turbine, and a wastegate valve configured to control communication and cutting off of the wastegate pipeline, and in the case that an intake gas amount of the exhaust gas entering into the turbine exceeds a preset value, the wastegate valve is opened to discharge a part of the exhaust gas via the wastegate pipeline.

An internal combustion engine for use with a propeller driven aircraft includes a camshaft adapted to function as an output shaft that rotates a propeller to provide propulsive thrust. A gear set is configured to transfer rotational power from the crankshaft to the camshaft and to rotate the camshaft at a velocity that is proportional to the rotational velocity of the crankshaft. The gear set is disposed rearward of the engine housing rearward wall and is configured to rotate the camshaft in a direction opposite the crankshaft rotation. The length of the camshaft reduces engine torsional vibration. In one embodiment, the engine is a six-cylinder compression ignition engine having a boxer configuration and can generate a peak output power within a range from about 300 horsepower to about 350 horsepower.

A control shaft of a cam shaft adjustment unit has axially spaced adjustment cams, which are designed in a first axial section of the control shaft for a continuous operation of a cylinder and in a second axial section for a cylinder shut-off. The adjustment cams for the continuous operation of a cylinder have, over the entire circumference of the cam circle, a radial extension which is greater than a zero stroke extension and the adjustment cams for the cylinder shut-off have, around their circumference, a shut-off section of the cam circle with a radial extension which is less than or equal to the zero stroke extension. The control shaft has a stop that reduces the rotation in both circumferential directions and functions as the calibration point for an engine electronics system.

Methods and systems are provided for a 2-port integrated exhaust manifold for an inline-3, inline-6, V-6, and/or V-12 engine. In one example, a system may include an exhaust manifold integrated within a cylinder head of an engine block. The integrated exhaust manifold may include a first set of two runners from a first outer cylinder coupled to a first manifold exhaust port, a second set of two runners of a second outer cylinder coupled to a second manifold exhaust port, and one runner of an inner cylinder coupled to the first manifold exhaust port and another runner of the inner cylinder coupled to the second manifold exhaust port.