The cylinder head includes an intake port communicating with a cylinder of a cylinder block, a cylinder head main body having an exhaust port communicating with the cylinder, and a rocker housing integrally formed on the cylinder head main body and an inner side of which is defined as a valve-system accommodating space. The rocker housing includes a lateral wall having a lateral wall main body and a base end portion which extends along a lower end of the lateral wall main body, connects the lateral wall main body to the cylinder head main body, and has a thickness thicker than that of the lateral wall body. A flow path which extends in an extending direction of the base end portion and through which a fluid flow is formed in the base end portion.

A cylinder head for use with an internal combustion engine, the cylinder head including a body having a fire deck and defining a water jacket in fluid communication with a cooling system. The cylinder head also includes a first runner defined by the body and open to the fire deck to at least partially form a first valve seat, a second runner defined by the body and open to the fire deck to at least partially form a second valve seat, and a channel defined by the body, where the cooling channel is in fluid communication with the water jacket and positioned between the first runner and the second runner, and where the cooling channel includes a flow diverter configured to produce a turbulent region proximate the fire deck.

A cylinder head for use with an internal combustion engine, the cylinder head including a body having a fire deck and defining a water jacket in fluid communication with a cooling system. The cylinder head also includes a first runner defined by the body and open to the fire deck to at least partially form a first valve seat, a second runner defined by the body and open to the fire deck to at least partially form a second valve seat, and a channel defined by the body, where the cooling channel is in fluid communication with the water jacket and positioned between the first runner and the second runner, and where the cooling channel includes a flow diverter configured to produce a turbulent region proximate the fire deck.

A cylinder head includes a water jacket. The water jacket includes multiple coolant spaces between combustion chambers adjacent. The multiple coolant spaces include a high-pressure space having relatively high internal pressures and a low-pressure space having relatively low internal pressures. The high-pressure space and the low-pressure space are alternately arranged with each other. The water jacket includes a first lateral passage passing through the low-pressure space and extending in the lateral direction of the cylinder head, and a communication passage passing between an intake valve hole and an exhaust valve hole, and allowing the high-pressure space and the low-pressure space to communicate with each other. A coolant outlet is connected to the first lateral passage. The coolant inlet is connected to the communication passage or the high-pressure space.

A cylinder head includes a water jacket. The water jacket includes multiple coolant spaces between combustion chambers adjacent. The multiple coolant spaces include a high-pressure space having relatively high internal pressures and a low-pressure space having relatively low internal pressures. The high-pressure space and the low-pressure space are alternately arranged with each other. The water jacket includes a first lateral passage passing through the low-pressure space and extending in the lateral direction of the cylinder head, and a communication passage passing between an intake valve hole and an exhaust valve hole, and allowing the high-pressure space and the low-pressure space to communicate with each other. A coolant outlet is connected to the first lateral passage. The coolant inlet is connected to the communication passage or the high-pressure space.

A cylinder head assembly for an engine assembly is provided herein. The cylinder head assembly may include a head framework, an exhaust liner include a thermal barrier material, an intake liner, and a polymeric housing disposed around at least a portion of the metal head framework and the exhaust liner. The cylinder head assembly may further include a plurality of channels for heating and/or cooling the cylinder head assembly, which can be defined in one or more of: the metal head framework, the exhaust liner, and the polymeric housing. Methods of making the cylinder head assembly are also provided herein.

A cylinder head housing for a combustion unit, which forms at least two cylinders arranged in-line, having receiving openings for one outlet valve each, which are assigned to the individual cylinders of the combustion unit, comprising exhaust gas channels, which extend from these outlet valve receiving openings and are merged into an exhaust gas outlet channel, and cooling channels having a roof distribution channel which is connected to an injector cooling channel provided for an arrangement above a cylinder and/or having a manifold distribution channel, which extends along the row of outlet valve receiving openings, the manifold distribution channel being connected to a plurality of manifold network channels running along the exhaust gas channels, which are directly or indirectly connected to a manifold collection channel, which extends along the row of outlet valve receiving openings.

A cylinder head housing for a combustion unit, which forms at least two cylinders arranged in-line, having receiving openings for one outlet valve each, which are assigned to the individual cylinders of the combustion unit, comprising exhaust gas channels, which extend from these outlet valve receiving openings and are merged into an exhaust gas outlet channel, and cooling channels having a roof distribution channel which is connected to an injector cooling channel provided for an arrangement above a cylinder and/or having a manifold distribution channel, which extends along the row of outlet valve receiving openings, the manifold distribution channel being connected to a plurality of manifold network channels running along the exhaust gas channels, which are directly or indirectly connected to a manifold collection channel, which extends along the row of outlet valve receiving openings.

A head assembly for an internal combustion engine includes an electromagnetic valve actuation system. The head has an intake or exhaust passage defined therein. A valve is disposed in the passage and is operable to selectively open and close the passage. The head has a cooling passage defined therein for passage of a cooling fluid. An electromagnetic actuator has a piston in mechanical communication with the valve and a coil in fluid communication with the cooling passage. The electromagnetic actuator is operable to move the valve between a closed and an open position.

The cylinder head includes a plurality of port wall portions configured to form flow paths for intake and exhaust, an outer circumferential wall portion formed in an annular shape disposed at an interval on an outside of the plurality of port wall portions and having a water chamber through which cooling water flows and which is formed at least between the port wall portions and the outer circumferential wall portion, and a bottom wall portion configured to face a combustion chamber of an engine and to connect ends of the port wall portions and the outer circumferential wall portion, wherein the outer circumferential wall portion includes a padding portion of which a thickness is increased toward a side close to the port wall portions so that a distance between the port wall portions and the outer circumferential wall portion is equal to or less than a predetermined distance.