A marine drive is for propelling a vessel in body of water. The marine drive has a powerhead, a crankcase on the powerhead, and a cooling system that pumps a first flow of cooling water from the body of water through a powerhead cooling conduit for cooling the powerhead and in parallel pumps a second flow of cooling water from the body of water through a crankcase cooler for cooling the crankcase and lubricant in the crankcase. A valve controls the second flow of the cooling water to the crankcase cooler. The valve is normally positioned in a closed position, which inhibits the second flow of cooling water to the crankcase cooler and thereby reduces condensation of water from the lubricant in the crankcase. The valve is moved into an open position upon operation of the powerhead at or above a threshold speed, which permits the second flow of cooling water to the crankcase cooler and thereby cools the lubricant in the crankcase. Corresponding methods of operating the marine drive and cooling system are provided.

A two-stroke engine comprises a first oiling system and a second oiling system. The first oiling system includes a low-pressure pump that distributes oil from a first oil tank to the two-stroke engine. The second oiling system includes a pump mechanically coupled to a crankshaft of the two-stroke engine, wherein the pump distributes oil from a second oil tank to an accessory at a pressure greater than the first oil pressure, wherein oil distributed to the accessory is returned to the second oil tank.

A system for attaching a heat exchanger to a vehicle includes a first bracket and a second bracket. The first bracket is secured to the heat exchanger and has a first plate. The first plate includes front and back surfaces. The first plate defines first and second notches on opposing peripheral edges of the first plate. The second bracket is secured to the vehicle. The second bracket has a second plate, a hook, and a clip. The second plate has an outer surface. The hook and the clip extend from opposing edges of the outer surface. The outer surface is configured to engage the front surface of the first plate. The hook and the clip are configured to extend through the first and second notches, respectively, and to engage the back surface of the first plate to secure the second bracket to the first bracket.

A control valve according to the present invention is configured such that when a third opening part, which is an auxiliary opening part, and a third discharge opening, which is an auxiliary connection opening, do not overlap, the third opening part and a continuous discharge opening overlap. Thus, for example, when a flow rate of cooling water for continuous circulation is required, such as during a cold start, cooling water guided through an internal passage is discharged via the continuous discharge opening in addition to cooling water guided from a bypass passage, thereby ensuring a sufficient flow rate of cooling water for continuous circulation.

A coolant circuit in a vehicle includes a first flow control unit disposed in a main duct between an engine and a radiator. The first flow control unit, as a function of a temperature of a coolant, thermostatically controls a flow of the coolant. A bypass duct is fluidically disposed parallel to the radiator where the bypass duct opens into the main duct after the radiator and branches off the main duct between the engine and the first flow control unit. A second flow control unit is disposed in the bypass duct where the second flow control unit is configured such that the second flow control unit opens or closes the bypass duct as a function of the temperature of the coolant.

A heat accumulating unit includes an upstream heat accumulator and a downstream heat accumulator each accommodating a supercooling heat accumulating material. Each of the upstream heat accumulator and the downstream heat accumulator has a channel in which fluid flows. In heat accumulation of the supercooling heat accumulating material, the channel of the upstream heat accumulator and the channel of the downstream heat accumulator are set in a serial connection state by a serial connection pipe. In a temperature rise mode, fluid that has passed through the channel of the upstream heat accumulator flows in a bypass pipe.

A lubricating system of an engine equipped with an idle reduction system includes an oil cooler, a remotely operable valve configured to open and close a bypass passage that bypasses the oil cooler, and an electronic control unit. The electronic control unit is configured to perform the steps of: controlling the valve so that a temperature of lubricating oil approaches a target temperature; and lowering the target temperature when an average torque of the engine is less than a predetermined threshold.

Combustion engines, and more particularly, integrating a supercritical fluid passageway into a cylinder head and/or cylinder block of an engine, and preferably, a combustion engine. Both a combustion engine system and a method of cooling a cylinder head in an internal combustion engine, utilizing supercritical fluid, are disclosed.

Systems and methods are provided for management of a thermal system. A system for thermal management includes a thermal system with fluid conduits. A sensor is disposed to monitor an input parameter state of the thermal system. An actuator is configured to vary a flow in the fluid conduits. A controller is configured to receive a signal representative of the input parameter state; process an actuator state through a flow model of the thermal system to obtain an existing flow in the fluid conduits; process the existing flow through a thermal model of the thermal system to determine an input that reduces an error between a desired parameter state and the input parameter state; process the input through an inverse flow model to convert the input to a desired actuator state; and position the actuator in the desired actuator state.

The present disclosure discloses a combined cooling system for a motor and a motor controller, which comprises a water cooling assembly, an oil cooling assembly, and an oil-water heat exchanger; one end of the water cooling assembly is connected to an cooling water outlet of the motor, the other end is connected to an cooling water inlet of the motor controller and/or a water inlet of the oil-water heat exchanger; one end of the oil cooling assembly is connected to a cooling oil outlet of the motor, the other end of the oil cooling assembly is connected to an oil inlet of the oil-water heat exchanger, and an oil outlet of the oil-water heat exchanger is connected to a cooling oil inlet of the motor. The above technical solution utilizes the temperature characteristics of the motor and the motor controller, and achieves the objects of saving energy in cooling, and improving high power output performance and environmental adaptability of the motor through the cooperation and intelligent control of the water pump, oil pump and fan in the combined cooling system.