Abstract: The coolant circuit downstream of the coolant pump 1 of an internal combustion engine is divided into a) an engine cooling loop (I) through the internal combustion engine (2) with a crankcase and a cylinder head, b) an exhaust loop (II) with an exhaust manifold (3) and a turbocharger (4) and c) a heat exchanger loop (III) with a charge heat exchanger (9) and a raw water heat exchanger (8) in a parallel configuration. These loops are recombined upstream of the coolant pump (1).

Abstract: A process of molding a cylinder block of a multi-cylinder engine comprises making a jacket core (30) so as to form cylinder jackets (8) of the multi-cylinder engine (E), attaching the jacket core (30) to a cylinder block forming mold (28), and pouring molten metal into the cylinder block forming mold (28). The process makes a water passage forming core (31) of sphered particle sand having a lower expansion coefficient than the common silica sand. The core (31) is intended for forming at a head side portion of an inter-bore wall (4) of the multi-cylinder engine (E), a cooling water passage (10) which communicates the cylinder jackets (8) with a head jacket (22). And prior to pouring the molten metal, the process fixedly attaches the water passage forming core (31) to a position corresponding to the inter-bore wall (4) of the jacket core (30).

Abstract: An engine cooling apparatus adopting a separate type radiator so as to make it possible to reduce the number of parts and simplify the internal structure of a water pump by connecting left and right radiators to a water pump. One end of a laterally-extending connecting pipe mounted across the engine in right and left directions is connected to a water pipe provided at an outlet tank of a left radiator, while the other end thereof is coupled with a joint pipe provided at an outlet tank of a right radiator. Water supplied from the left radiator flows through the laterally-extending connecting pipe and meets water flow from the right radiator in the outlet tank. A water pump sucks the water collected in the outlet tank through a water duct via a water pipe provided in the lower part of the outlet tank, and pressurizes the water and supplies it to a water jacket of the engine.

Abstract: A cooling circuit for an internal combustion engine has a main heat exchanger for cooling cooling medium circulating in the cooling circuit. A secondary heat exchanger provides heating of heating air to be supplied to a vehicle interior. A thermostatic valve has a simple design which makes it possible to heat the vehicle interior even in the case of a maximum cooling capacity for the internal combustion engine. An inlet of the thermostatic valve is connected to an outlet of the internal combustion engine and a first outlet of the thermostatic valve is connected to an inlet of the main heat exchanger. An outlet of the main heat exchanger is connected to an inlet of the internal combustion engine and a second outlet of the thermostatic valve is connected to the inlet of the internal combustion engine via a short-circuit line.

Abstract: A cooling device for an internal combustion engine is installed in a motor vehicle, especially in a passenger car. The cooling device has several radiators, which are disposed in a front section of the passenger car and connected over pipelines with the internal combustion engine. For reasons of space and to improve the effect, the cooling device in the front section, comprises a radiator, which extends transversely to the longitudinal direction of the vehicle, and two lateral radiators, which extend obliquely to a longitudinal central plane. Through the agency of a collecting device with cooling water outlet pipelines, the radiators are connected to a common supplying pipeline, which is connected with the internal combustion engine. Moreover, downstream from the internal combustion engine, there is a returning pipeline, which is connected with a branching device, from which the cooling water-returning pipelines lead to the radiators.

Abstract: A first cooling system is formed in a motor-assist device for a vehicle such that a motor housing including a motor is provided with a cooling path communicating with a cooling path in an engine, and the former cooling path is connected to a radiator, a water pump and the engine in that order. A second cooling system for cooling an inverter, which is separate from the first cooling system, is provided in the rear of the vehicle. The second cooling system includes a water pump and a radiator mounted on a lateral rod brace. Accordingly, the size of the second cooling system can be determined based on the amount of heat generated only in the inverter.

Abstract: Method for managing the temperature of a fuel-cell-powered electric vehicle having at least one high temperature heat transfer circuit and one low temperature heat transfer circuit each using the same dielectric heat transfer medium as the other. The circuits are in flow communication with each other and the heat transfer medium is pumped from one circuit to the other in response to the thermal demands of the vehicle.

Abstract: A two-cycle, multi-cylinder engine maintains roughly equal temperatures between cylinders, despite differing exhaust efficiencies between the cylinders. Several ways of reducing the temperature of one of the cylinders in comparison to the other are disclosed. One embodiment involves supplying more coolant to the cooling passages around the hotter running cylinder. Other ways involve reducing the compression ratio or retarding ignition timing in the hotter running cylinder in comparison to the other cylinder.

Abstract: A cooling system for an internal combustion engine includes a first circuit for cooling the cylinder head and a second circuit for cooling the engine block which are completely separated from each other and make use of a first fluid and a second fluid which are never mixed with each other. The flow of the first fluid circulating in the circuit for cooling the cylinder head is used, totally or partially, for cooling the second fluid which cools the engine block in a heat exchanger. Preferably, the second cooling fluid is the engine lubricating oil.

Abstract: The invention provides a cooling apparatus for a vehicular engine which can improve the life of at least one of, an exhaust gas recirculation unit and an intercooler. With the cooling apparatus for a vehicular engine of the invention, then with a vehicular engine (an automobile in this example) provided with at least one of an exhaust gas recirculation unit (EGR) 50a and an intercooler 50 for a turbocharger 100, there is provided a radiator 9, and an electric pump 53 for circulating coolant to carry heat generated by at least one of the exhaust gas recirculation unit (EGR) 50a and the intercooler 50 to the radiator 9. When the automobile engine 3 is stopped, the operation of the electric pump 53 continues for a fixed period so that the coolant cooled by the radiator 9 is circulated to at least one of the EGR 50a and the intercooler 50b to provide cooling to thus rapidly reduce the temperature. The electric pump 53 is then stopped when a low temperature is reached.

Abstract: To make it possible to extract air from a water pump without the need for a dedicated structure for air extraction in the water pump which supplies cooling water to a cooling jacket on a cylinder head or cylinder block of a horizontally opposed or V-type engine. A circular pump chamber for rotatably housing an impeller inside a pump housing of a water pump includes an upper discharge path extending diagonally upwards and connecting to an upper end section of the pump chamber, and a lower discharge path extending diagonally downwards and connecting to a lower end section of the pump chamber. First and second connecting pipes respectively extending in a straight line along a line extended from the upper and lower discharge paths have inner ends communicating with the upper and lower discharge paths, and outer ends forming first and second discharge ports.

Abstract: A control system and method for controlling the speed of a plurality of fans for cooling a plurality of fluids in a work machine in accordance with the heat dissipation requirements of the particular heat transfer cores, the present control system including a plurality of sensors positioned to sense the temperature of each of the plurality of fluids, each sensor being operable to output a signal indicative of the temperature of that particular fluid. An electronic controller coupled to the sensors receives signals indicative of the temperature of each of the plurality of fluids, determines therefrom a desired fan speed for each fan, and outputs a signal to individually control the speed of each fan. Each output signal is based upon a comparison of at least some of the temperature error signals determined from the plurality of sensor signals.

Abstract: An engine of the outboard motor comprises an engine body and a plurality of engine components disposed around the engine body. The cooling system comprises first and second water passages. The first water passage is arranged to cool the engine body. The second water passage branches off from the first water passage upstream the engine body and extends through the engine components. One of the engine components is generally positioned above the engine body. In one arrangement, two of the other engine components are generally positioned on different sides of the engine body relative to one another. In another arrangement, the first and second water passages have separate discharge ports. In a further arrangement, the engine components are made of a metal material. The second water passage at least in part is defined by tubular members made of corrosion-resistant materials and the respective tubular members are at least partially embedded in the respective bodies of the engine components.

Abstract: To provide an engine cooling system including a water pump for circulating cooling water in order to cool an engine, and a thermostat provided in the water pump in such a manner as to be openable/closable depending on the temperature of cooling water. The thermostat is provided in the water pump with a reduced number of parts, to thereby reduce the cost, weight and the number of assembling steps. A casing of a water pump is composed of a pump body for rotatably supporting a pump shaft and a pump cover connected to the pump body in such a manner as to cover an impeller fixed to the pump shaft. A thermostat is contained in a containing portion formed in the pump cover in such a manner as to be held between the pump body and the pump cover.

Abstract: A control apparatus and method for controlling an automotive heater apparatus. The heater apparatus includes a coolant circuit for cooling an engine, a coolant circulating through the circuit, a heat generator for transferring heat to the coolant, and a heater core for transferring heat from the coolant. The heat generator houses a viscous fluid and a rotor selectively connected to and disconnected from the engine by a clutch. The clutch connects the engine with the rotor to shear the viscous fluid and generate heat. When the rotating speed of the rotor exceeds a rotor speed limit, which varies in accordance with the detected coolant temperature, the clutch disconnects the rotor of the heat generator from the engine and de-activates the heat generator.

Abstract: An internal combustion engine cam drive arrangement and coolant manifold. The engine comprises an engine body that is formed with an coolant opening that is circumscribed by a flexible transmitter that drives cam shafts from the engine crankshaft. A coolant manifold communicates with this opening and overlies in part the flexible transmitter. At least a major part of the remaining portion of the flexible transmitter is covered by a timing cover. The timing cover and the coolant manifold each may be removed from the engine body independently of the other.

Abstract: A cooling system for an internal combustion engine includes two independently operated subsystems, one for the cylinder head of the engine and one for the engine block. The cylinder head cooling subsystem includes a pump for flowing a first coolant from a first reservoir through a first radiator and the cylinder head of the engine. A temperature sensor is provided for measuring the first coolant temperature in the cylinder head cooling subsystem, and a control module responsive thereto for regulating the flow of the first coolant circulated by the pump. The engine block cooling subsystem is physically and functionally independent of the cylinder head cooling subsystem and includes a reservoir filled with a second coolant in fluid communication with a second radiator and a control device for controlling the flow of the second coolant to the engine block. The engine block cooling subsystem operates through natural thermodynamic flow without the use of a pump.