Methods and systems are provided for a cooling arrangement. In one example, a plurality of engine oil passages extend through a cylinder head coolant jacket. The plurality of engine oil passages is fluidly separated from the cylinder head coolant jacket.

A cooling apparatus of a piston according to an exemplary embodiment of the present disclosure may include a piston configured to be formed with a cooling gallery, an inlet fluidly communicated with the cooling gallery, and an outlet fluidly communicated with the cooling gallery, therein, a first oil jet configured to inject cooling oil into the inlet, and a second oil jet configured to inject cooling oil into the outlet.

Methods and systems are provided for controlling a temperature of an oil used for lubricating an engine of a vehicle. In one example, a method comprises controlling an oil pump to pump oil at a first pressure, a second pressure or a third pressure in order to bias an oil cooler bypass valve to a first position, a second position or a third position, respectively, as a function of engine operating conditions. In this way, oil may be selectively routed through or around the oil cooler depending on engine operating conditions, which may serve to control oil temperature in line with the operating conditions and additionally improve fuel economy by reducing a load on the oil pump when operating conditions are such that the oil pump can be bypassed.

The present invention is proposed to simplify a structural complexity of a conventional oil cooling method for a car motor, reduce a material cost, and also achieve improved cooling performance, in which a cooling liquid, which is provided through a cooling pipe in a conventional case, is sprayed onto a heating portion in a motor through a reservoir tank and a nozzle which are attached to a motor housing through a direct cooling method. A reservoir space is integrally formed with the motor housing or is formed to be separate from the motor housing, a pressure of the cooling liquid is uniformly maintained and damped, and the cooling liquid introduced into the reservoir tank through a flow path formed without a cooling pipe is directly sprayed onto the heating portion to cool the heating portion such as a stator core or a coil.

A captive screw spray nozzle comprising a screw for holding the spray nozzle on a support, the screw comprising a screw head engaging with a holding member, secured to the spray nozzle, and forming a stop for retaining the captive screw on the spray nozzle.

An engine device including a cylinder head provided with a plurality of air-intake passages for taking fresh air into a plurality of air-intake ports and a plurality of exhaust gas passages for emitting exhaust gas from a plurality of exhaust gas ports. An air-intake manifold which aggregates the air-intake passages is formed integrally with one of left and right side portions of the cylinder head. An EGR cooler is coupled to a front surface of the cylinder head; and EGR gas passages and cooling water passages communicating with the EGR cooler are provided in a coupling portion of the cylinder head with the EGR cooler.

Systems, apparatus, and methods described herein can overcome some of the disadvantages associated with existing internal combustion engines. In particular, systems, apparatus, and methods described herein relate to improving the combustion process of internal combustion engines through insert technologies, engine modifications, control technologies, and/or other methodologies.

An oil passageway structure for internal combustion engines includes a cylinder head having an inter-bearing wall fluid communication oil passage for providing fluid communication between a plurality of bearing walls to allow oil to flow therebetween. The cylinder head further includes a bearing wall oil passage branched from the inter-bearing wall fluid communication oil passage to supply oil to a bearing surfaces of at least one of the bearing walls. The inter-bearing wall fluid communication oil passage is defined in one of facing side walls. The bearing wall oil passageway is defined in at least one of the bearing walls. The oil passageway structure is thus made up of a reduced number of parts, can be assembled with a reduced number of man-hours, can lead to productivity growth, and is inexpensive to manufacture.

An engine cooling structure includes a cylinder block including a block inner peripheral wall and a block outer peripheral wall that define a water jacket, and a spacer housed in the water jacket. The block outer peripheral wall includes a coolant inlet for introducing a coolant into the water jacket at one end in a cylinder row direction. The spacer includes a peripheral wall surrounding the block inner peripheral wall, and a dividing wall and a distribution wall provided on the peripheral wall. The dividing wall is provided along a circumferential direction of the peripheral wall and protrudes outward from the peripheral wall between a lower end and an upper end of the coolant inlet. The distribution wall includes an upper distribution wall extending upward from the dividing wall and a lower distribution wall extending downward from the dividing wall.

A cooling apparatus of a piston according to an exemplary embodiment of the present disclosure may include a piston configured to be formed with a cooling gallery, an inlet fluidly communicated with the cooling gallery, and an outlet fluidly communicated with the cooling gallery, therein, a first oil jet configured to inject cooling oil into the inlet, and a second oil jet configured to inject cooling oil into the outlet.