Abstract: A hydrogen fuel tank mounting system for a vehicle comprises a first mount for mounting a first portion of the fuel tank in a fixed position and a second mount for slidably mounting a second portion of the fuel tank. In this manner, the mounting system reduces stress on fuel system components when accommodating expansion and contraction of the hydrogen fuel tank, improving durability. The fuel tank may be a dual port fuel tank, and the first and second portions may be elongated neck portions. The fixed mount may be a bracket formed in two portions with a clearance between them. A sleeve may extend through at least part of the portions of the brackets to distribute shear forces away from an interface between those portions. The provision of a slidable mounting also allows pre-assembly of the fuel tank and mounts, facilitating installation of the hydrogen fuel system.

Abstract: Methods and systems are provided for an oil gallery of a piston. In one example, a system for a piston comprising an internal oil gallery. The internal oil gallery comprises one or more of a funnel shaped inlet, a funnel shaped outlet, and a plurality of tongues extending along a circumference of the internal oil gallery.

Abstract: Systems are provided for a cooling arrangement of an engine. In one example, a system includes a first coolant passage and a second coolant passage arranged in a cylinder bridge between directly adjacent cylinders, wherein the first coolant passage and the second coolant passage are separated from one another.

Abstract: Methods and systems are provided for an oil gallery of a piston. In one example, a system for a piston comprising an internal oil gallery. The internal oil gallery comprises one or more of a funnel shaped inlet, a funnel shaped outlet, and a plurality of tongues extending along a circumference of the internal oil gallery.

Abstract: Systems are provided for a cooling arrangement of an engine. In one example, a system includes a first coolant passage and a second coolant passage arranged in a cylinder bridge between directly adjacent cylinders, wherein the first coolant passage and the second coolant passage are separated from one another.

Abstract: An internal combustion engine with coolant jackets is provided. The internal combustion engine includes a cylinder head coupled to a cylinder block to form a first cylinder, an upper head-associated coolant jacket including a coolant conduit traversing the cylinder head, a lower head-associated coolant jacket fluidly separated from the upper cylinder head coolant jacket and including a coolant conduit traversing the cylinder head vertically below the upper head-associated coolant jacket, and a block-associated coolant jacket including, a first coolant passage having an inlet in fluidic communication with a coolant pump outlet and an outlet in fluidic communication with an inlet of the lower head-associated coolant jacket, and a second coolant passage having an inlet in fluidic communication with an outlet of the lower head-associated coolant jacket and an outlet in fluidic communication with a heat exchanger.

Abstract: An engine line is described herein that includes a first engine including a front end accessory drive system and a second engine including a greater number of cylinders than the first engine and a front end accessory drive system. The engine line further includes a generator, in different manufacturing arrangements, mounting to each of the front engine accessory drive systems in the first and second engines in a common location.

Abstract: A cooling system in an engine is provided. The cooling system includes a cylinder bore including a central axis, a coolant duct including a first section positioned on a first side of the cylinder bore and a second section positioned on a second side of the cylinder bore, a connecting duct extending between the first section and the second section and including a first end opening into the first section and a second end opening into the second section. The connecting duct includes a first subsection and a second subsection extending inwardly toward the central axis and an intersection of the first subsection and the second subsection in a plane perpendicular to the central axis form a non-straight angle.

Abstract: An engine line is described herein that includes a first engine including a front end accessory drive system and a second engine including a greater number of cylinders than the first engine and a front end accessory drive system. The engine line further includes a generator, in different manufacturing arrangements, mounting to each of the front engine accessory drive systems in the first and second engines in a common location.

Abstract: Methods and system are provided for a cooling arrangement of an engine. In one example, the cooling arrangement may include first and second cooling ducts, where the second cooling ducts are arranged in gaps formed between adjacent cylinders and the first ducts are arranged outside of the gaps of the adjacent cylinders.

Abstract: Methods and systems are provided for a cooling system for a vehicle engine. In one example, the cooling system includes a coolant solution circulated through both an engine cooling circuit and a vehicle interior heating circuit that is fluidly coupled to the engine cooling circuit, and a reservoir containing concentrated antifreeze. The concentrated antifreeze is flowed from the reservoir to the vehicle interior heating circuit via a shutoff valve to increase a concentration of antifreeze in the coolant solution. In some embodiments, a separation unit may be used to decrease the concentration of antifreeze in the coolant solution.

Abstract: A cooling system in an engine is provided. The cooling system includes a cylinder bore including a central axis, a coolant duct including a first section positioned on a first side of the cylinder bore and a second section positioned on a second side of the cylinder bore, a connecting duct extending between the first section and the second section and including a first end opening into the first section and a second end opening into the second section. The connecting duct includes a first subsection and a second subsection extending inwardly toward the central axis and an intersection of the first subsection and the second subsection in a plane perpendicular to the central axis form a non-straight angle.

Abstract: Methods and systems are provided for a cooling system for a vehicle engine. In one example, the cooling system includes a coolant solution circulated through both an engine cooling circuit and a vehicle interior heating circuit that is fluidly coupled to the engine cooling circuit, and a reservoir containing concentrated antifreeze. The concentrated antifreeze is flowed from the reservoir to the vehicle interior heating circuit via a shutoff valve to increase a concentration of antifreeze in the coolant solution. In some embodiments, a separation unit may be used to decrease the concentration of antifreeze in the coolant solution.

Abstract: A reciprocating piston engine which has a cylinder block, at least one combustion chamber arranged in the cylinder block and a liner which borders the combustion chamber and is composed of a first material is provided. In one example, the reciprocating piston engine comprises a reinforcing element composed of a second material for the radial reinforcement of the liner, said reinforcing element being arranged between the cylinder block and the liner and at least partially surrounding the liner, with the second material having a higher modulus of elasticity than the first material.

Abstract: An internal combustion engine with coolant jackets is provided. The internal combustion engine includes a cylinder head coupled to a cylinder block to form a first cylinder, an upper head-associated coolant jacket including a coolant conduit traversing the cylinder head, a lower head-associated coolant jacket fluidly separated from the upper cylinder head coolant jacket and including a coolant conduit traversing the cylinder head vertically below the upper head-associated coolant jacket, and a block-associated coolant jacket including, a first coolant passage having an inlet in fluidic communication with a coolant pump outlet and an outlet in fluidic communication with an inlet of the lower head-associated coolant jacket, and a second coolant passage having an inlet in fluidic communication with an outlet of the lower head-associated coolant jacket and an outlet in fluidic communication with a heat exchanger.

Abstract: Methods and system are provided for a cooling arrangement of an engine. In one example, the cooling arrangement may include first and second cooling ducts, where the second cooling ducts are arranged in gaps formed between adjacent cylinders and the first ducts are arranged outside of the gaps of the adjacent cylinders.

Abstract: An auto-ignition engine system is provided. The auto-ignition engine system includes a cylinder having an intake valve and an exhaust valve coupled thereto, an opening in a cylinder head defining a portion of the boundary of the cylinder, a glow plug heating element extending through the opening into the cylinder, an insert at least partially surrounding a glow plug heating element and coupled thereto, and an adjustment mechanism configured to alter the position of the glow plug heating element and the insert in the cylinder.

Abstract: Methods and systems are provided for separately providing liquid-cooling to a cylinder head and a cylinder block. In one example, a method includes selectively pumping coolant with a single pump to each of a first cylinder head coolant jacket and a cylinder block coolant jacket based on engine temperatures. The method further includes discharging coolant from the first cylinder head coolant jacket to a heating circuit line including a vehicle interior heater and discharging coolant from the cylinder block cooling jacket and back to the single pump.

Abstract: A reciprocating piston engine which has a cylinder block, at least one combustion chamber arranged in the cylinder block and a liner which borders the combustion chamber and is composed of a first material is provided. In one example, the reciprocating piston engine comprises a reinforcing element composed of a second material for the radial reinforcement of the liner, said reinforcing element being arranged between the cylinder block and the liner and at least partially surrounding the liner, with the second material having a higher modulus of elasticity than the first material.

Abstract: An auto-ignition engine system is provided. The auto-ignition engine system includes a cylinder having an intake valve and an exhaust valve coupled thereto, an opening in a cylinder head defining a portion of the boundary of the cylinder, a glow plug heating element extending through the opening into the cylinder, an insert at least partially surrounding a glow plug heating element and coupled thereto, and an adjustment mechanism configured to alter the position of the glow plug heating element and the insert in the cylinder.