Abstract: An lubricating oil from an oil pump that is driven by rotation of an engine is supplied as a refrigerant to a rotor of an assist motor via a pressure valve. The pressure valve is configured to be closed when the pressure of the lubricating oil is less than a predetermined value, and to open when the pressure of the lubricating oil is greater than or equal to the predetermined value. As a result, when the rotor is in low need for cooling down because the temperature rise of the rotor is small although the rotation speed of the rotor rises, that is, when the engine is operating at a low rotation speed with a high load, the supply of lubricating oil to the rotor is reduced or stopped.

Abstract: An exhaust heat recovery system (10) includes an exhaust heat recovery heat exchanger (18) in which heat is transferred from exhaust gas discharged from an internal combustion engine (12) to an engine coolant for cooling the internal combustion engine (12), and a heat pump system (22) for recovering exhaust heat of exhaust gas. The heat pump system (22) includes a refrigerant circulation passage (24) for circulating CO2 refrigerant, a heat-absorbing heat exchanger (32) in which heat is transferred from exhaust gas to the CO2 refrigerant, and a heat-releasing heat exchanger (28) in which the exhaust heat recovered by heat transfer to the CO2 refrigerant in the heat-releasing heat exchanger (32) is recovered.

Abstract: The invention relates to a coolant circuit (5, 6, 7, 7a, 8, 8a), preferably for cooling a drive or an engine (2) of a motor vehicle (1), in particular of a passenger car, comprising: a controller (8) which, in order to control the temperature of a cooling fluid (7a), activates an electrically operated fan motor (5). The controller (8) is in thermal contact with the cooling fluid (7a) in order to be cooled and is formed to detect the temperature of the cooling fluid (7a) by way of a temperature sensor (8a) which is preferably provided at the controller (8). A defined temperature of the cooling fluid (7a) can thereby be set without a control signal from a master control or regulating device being required for this purpose.

Abstract: A cooling system includes a first cooling system in which coolant is supplied from a radiator to a motor so as to cool the motor, and then the coolant is supplied to banks of an engine through a circulation passage and split flow passages so as to cool the engine; and a second cooling system in which the coolant delivered from the radiator through a branch passage is further cooled by a radiator, and the cooled coolant is supplied to a drive circuit so as to cool the drive circuit. With this configuration, it is possible to efficiently cool the motor, the engine, and the drive circuit whose suitable operating temperatures are different from each other, and to make the configuration of the cooling system simple.

Abstract: The present invention provides a method for controlling and/or regulating a cooling system, a desired coolant temperature being determined from a desired component temperature in a desired coolant temperature determination. Energy consumption of a driving engine and a coolant flow may be taken into consideration in the determination of the desired coolant temperature.

Abstract: A system for cooling an engine on a vehicle without a coolant based intercooler and intermediate duct, the system including an air-to-oil radiator system configured to cool oil that flows through an engine, an air-to-air radiator system configured to cool air that flows through the engine and further configured to operate in conjunction with the air-to-oil radiator system to provide cool air for use with the air-to-oil radiator system, and a slow flow coolant radiator configured to cool a coolant provided to cool the engine and further provided to operate in conjunction with the air-to-oil radiator system. A method for cooling oil in an engine without a coolant based intercooler and intermediate duct is also disclosed.

Abstract: A cooling pump for an internal combustion engine and a cooling system including the pump. The pump is driven by an electrically-operated motor so as to rotate in a positive direction for supplying cooling water in a reservoir tank to the engine and in a reverse direction for returning the cooling water in the engine to the reservoir tank. The cooling system includes a controller that is coupled with the motor of the pump and generates a first control signal for operating the motor to rotate the pump in the reverse direction so as to return the cooling water in the engine to the reservoir tank and generates a second control signal for operating the motor to rotate the pump in the positive direction so as to supply the cooling water in the reservoir tank to the engine, on the basis of an operating condition of the engine.

Abstract: A cooling control unit for a water-cooled multi-cylinder internal combustion engine having a cylinder deactivation mechanism for controlling the flow of coolant to prevent the internal combustion engine from being incompletely warmed up when the internal combustion engine returns to its operating condition with all of the cylinders being activated. A communicating passage communicates with a normally activated cylinder coolant jacket as a coolant passage formed for normally activated cylinders and a deactivation-programmed cylinder water jacket as a coolant passage formed for the deactivation-programmed cylinders to communicate with each other, and through which the coolant flows. A bypass passage diverges from the communicating passage and bypasses the deactivation-programmed cylinder coolant jacket. A diversion control valve is provided in a diversion section where the bypass passage diverges from the communication passage.

Abstract: In an internal combustion engine system where the heat in the engine jacket coolant is discharged in a water cooled heat exchanger, an independent and automatic by-pass safety cooling system responsive solely and directly to engine jacket coolant temperatures to ensure that cooling of the engine will continue without reliance upon any other control system or personnel.

Abstract: A cooling water attachment device for a small boat can include a joint attachment part having a cooling water inlet/outlet port provided on a side surface of an engine opposite an exhaust pipe. A joint member can be formed with a recess for communication with the cooling water inlet/outlet port and can be attached to the joint attachment part. Branch piping and connection piping can be connected to the joint member. The branch piping and the connection piping can extend parallel to the side surface of the engine. The joint member can be attached below the lowest end of a water cooling jacket part, and the branch piping can extend downward from the joint member.

Abstract: A device and method for heating a positive crankcase ventilation system in a hybrid vehicle includes a ventilation device, provided on a crankcase, and a supercooling cycle for cooling power electronics for an electric motor of the hybrid vehicle. The ventilation device is heatable by way of the supercooling cycle in order to prevent icing of the ventilation device.

Abstract: An internal combustion engine control apparatus includes: a fuel injector; a cooling fan of a radiator that radiates the heat of coolant in a coolant passage in the internal combustion engine; a flow rate control mechanism that variably controls the flow rate of the coolant; an abnormality detector that detects an abnormality of the cooling fan; and a controller that controls the amount of fuel injected from the fuel injector to the internal combustion engine and the operation of the flow rate control mechanism in accordance with the result of the abnormality detector.

Abstract: A method for controlling an engine output with at least two actuators, including applying inputs to actuators which regulate a variable of an engine, evaluating the response of the system, determining the ability of the actuators to change the engine variable, determining the capability of the actuators to reject a disturbance, calculating an optimum actuator feedforward control function based upon the ability and capability determined and controlling the actuators using the calculated function and a feedforward control algorithm.

Abstract: A method of controlling alternator temperature and engine temperature for a vehicle is provided. The method comprises rotating a first drive shaft to generate electricity during an operation of an engine; rotating a second drive shaft to cause pumping of coolant to cool at least portion of the alternator and the engine where the first and second drive shafts are operatively coupled such that rotation of the first drive shaft imparts rotation to the second drive shaft; and selectively routing coolant through multiple different fluid pathways in response to an engine operation condition.

Abstract: A cooling system for cooling a plurality of heat producing systems includes a heat exchanger having a plurality of cooling zones, each of which has a respective inlet and outlet for facilitating flow of a respective temperature control fluid therethrough. Each of the respective temperature control fluids facilitates temperature control of a respective heat producing system. A plurality of fans cool the temperature control fluids flowing through the heat exchanger, and a fan or fans are disposed proximate each zone of the heat exchanger to provide air flow substantially independently from the air flow over the other cooling zones.

Abstract: The invention concerns an engine cooling system that comprises a cooling circuit (8) and an evaporative cooling arrangement (9). The cooling circuit (8) has a cooling capacity provided by exchanging the heat generated by the engine with ambient air. The evaporative cooling arrangement (9) has a cooling capacity provided by dissipating the heat generated by the engine, by vaporisation of a vaporising coolant in a boiler. The cooling capacity of the evaporative cooling arrangement (9) is such that with the cooling capacity of the cooling circuit (8), the global capacity of the cooling system can match, at least peak, cooling demands. As the cooling capacity of the cooling system is divided between the capacity of the cooling circuit and the capacity of the evaporative cooling arrangement, the capacity of the cooling circuit can be reduced in comparison to a conventional cooling circuit which has to match alone peak cooling demands.

Abstract: In order to reduce driving power of an engine cooling system in which a cooling fan for cooling a radiator and a water pump are driven by a motor, according to the invention, a pump motor of the water pump 5 which circulates liquid coolant is used as a drive source of the cooling fan. An electromagnetic clutch is provided between the pump motor and the cooling fan, and when the liquid coolant exiting from an engine is at a predetermined temperature or higher, the electromagnetic clutch is brought into a connected state, whereas when the liquid coolant is at a temperature lower than the predetermined temperature, the electromagnetic clutch is brought into a disconnected state. When the liquid coolant is at a temperature lower than the predetermined temperature, and the vehicle speed is at a predetermined speed or higher, the electromagnetic clutch is brought into a connected state, and a rotational force of the cooling fan receiving driving wind is transmitted to the pump motor to reduce its load.

Abstract: An electronically controlled thermostat control method is obtained which makes it possible to eliminate the response delay from the time that the required cooling water temperature is set to the time that the actual cooling water temperature reaches the set water temperature by controlling the flow rate, and to realize high cooling water temperature tracking characteristics with a high degree of precision at a low cost.

Abstract: An apparatus for detecting a failure of a thermostat provided between an engine and a radiator is provided. The thermostat regulates circulation of cooling water between the engine and the radiator. The apparatus comprises a radiator water temperature sensor disposed on the radiator side relative to the thermostat and a controller. The controller performs a process for detecting a failure of the thermostat based on the output of the radiator water temperature sensor when the engine has reached a desired warm condition. In one example, it is determined whether the engine has reached the desired warm condition based on the output of the engine water temperature sensor that is provided in the engine side relative to the thermostat. In another example, it is determined whether the engine had reached the desired warm condition according to whether a vehicle-related process is activated.

Abstract: A control arrangement (10) comprises a first selectable controller (12) for controlling an action, and a second selectable controller (14) for controlling the action. The arrangement also includes a selector (22) for selecting one of the controllers (12, 14) to control the action. The arrangement (10) further includes a first heat exchanger (16) associated with the first controller (12) to effect a transfer of heat between the first controller (12) and the first heat exchanger (16). The arrangement also includes a second heat exchanger (18) associated with the second controller (14) to effect a transfer of heat between the second controller (14) and the second heat exchanger (18).

Abstract: An engine cooling system is described that uses the same actuator to adjust both fan speed and coolant pump speed based on operating conditions of the engine and vehicle. The airflow and coolant flow are thus dependent, however, they are independent from engine speed.

Abstract: In a cooling and heating device for an internal combustion engine having a main coolant pump supplying coolant to the engine and a coolant return line with a return flow control unit which directs the coolant return flow to the main coolant pump selectively via a large cooling circuit, in which an air/fluid cooler is arranged, or via a small cooling circuit bypassing the air/fluid cooler, an oil/coolant heat exchanger is provided for heating or cooling a flow of oil, the flow of coolant through the oil/coolant heat exchanger being controlled by means of a coolant flow control unit directing the flow through the oil/coolant heat exchanger only after a predefined coolant temperature has been reached so that, below this temperature, no heat is extracted from the coolant by the oil/coolant heat exchanger and rapid heating of the internal combustion engine is ensured.

Abstract: A cooling system for an internal combustion engine 1 is disclosed in which an electronically controlled flow control valve 9 is used to control the flow of coolant exiting the engine 1. The electronically controlled flow control valve 9 is able to control the cooling of the engine 1 irrespective of the speed at which a pump 2 used to urge coolant to flow into the engine 1 is rotated by a drive belt 3 connected to an output 4 from the engine 1.

Abstract: In a method for controlling the heat in an internal combustion engine for a vehicle with a coolant circuit and actuable devices for influencing the heat balance of the internal combustion engine, wherein a coolant temperature and further operating parameters of the internal combustion engine are recorded, the actuable devices are operated as a function of the coolant temperature and the further operating parameters of the internal combustion engine in such a manner that an output value for determining a control variable is provided by means of a basic characteristic diagram as a function of the rotational speed and the load on the internal combustion engine, and this control value is corrected by means of a controller as a function of the coolant temperature and/or the further operating parameters.

Abstract: A series type hybrid electric vehicle that controls an internal combustion engine, generator, and electric motor for reducing the load applied to the internal combustion engine when the internal combustion engine is restarted, lowers the thermal stresses to the internal combustion engine when the engine is turned off and is able to remove excess fuel when turning off the internal combustion engine.

Abstract: A method of controlling a device comprising an adjusting component which is associated in its operation with a means for actuating the movable element of said component, a means for sensing the actual position of the movable element and a control means, characterised in that it comprises, at the beginning of any operating cycle, initialising the adjusting device by determining the “fully clsoed” and “open to the maximum” positions of the movable element (1?), and indexing the control means (5) and setting its parameters accordingly then, during the consecutive running of the operating cycle, continously or at regular intervals putting the open/closed state of the adjusting component (1?) under the control of the reference signal (SIGN), by adjusting the control signal (IN) which is applied according to the result of comparing the indicated positions of the movable element (1?), obtained firstly from the reference signal (SIGN) and secondly from the (OUT) signal delivered by the sensing means (4).

Abstract: A method for cooling a motor vehicle engine consists in regulating the volume and the flow rate of a coolant fluid in a hydraulic circuit provided with a degassing bypass hose equipped with an electronically controlled proportional actuator and with means forming direct return of fluid or bypass. The method comprises a step of determining the temperature of the cooling liquid, a step of comparing the temperature of the cooling liquid with a first and second threshold temperature, and a step of controlling the opening of the actuator such that, when the fluid temperature is between the first and the second threshold temperatures, the degree at which the actuator is opened is at least temporarily proportional to the cooling fluid temperature. The invention also concerns a device for cooling a motor vehicle engine.

Abstract: A flow control valve used in a cooling system of a water cooling type includes a first valve body and a first valve seat for controlling a quantity of radiator flow which returns from an engine to a pump through a radiator, a second valve body and a second valve seat for controlling a quantity of bypass flow which returns from the engine to the pump without passing through the radiator, and a step motor for displacing the valve bodies integrally as a valve unit. The first valve body, the first valve seat, the second valve body, and the second valve seat are so arranged that, in a range where the radiator flow quantity becomes practically zero, the bypass flow is permitted to flow at a slightly larger quantity than the radiator flow and, in other ranges, the bypass flow quantity is equal to or lower than the radiator flow quantity.

Abstract: A working medium supply control system in a heat exchanger is provided. The heat exchanger (14) carries out heat exchange between an exhaust gas flowing through an exhaust passage of an internal combustion engine (11) and water flowing through a heat transfer tube (13), and the exhaust gas thereby heats the water to generate steam at a target temperature. The system is provided with a plurality of flow control valves (17a to 17j) that can individually regulate the amount of water supplied to a plurality of headers provided in the heat transfer tube (13), and control means (21) individually controls the amounts of water supplied via the respective flow control valves (17a to 17j) based on the rotational speed and the load of the internal combustion engine (11).

Abstract: A reservoir includes an orifice, a cover for closing the orifice and at least one blocking device for blocking the cover against opening in the event of excess pressure in the reservoir. The blocking device blocks the cover by a form fit.

Abstract: The invention is based on a method for monitoring a cooling fluid circuit (16) of an internal combustion engine (10), with at least one heat exchanger (18, 22), a regulating valve (26), a cooling fluid pump (32), and an electronic control unit (76). The invention proposes that the control unit (76) predetermine a permissible upper and lower deviation of a reference parameter from a desired value, based on operating parameters of the internal combustion engine (10) and with the aid of deviation characteristic fields (56, 58), and that it compare these permissible upper and lower deviations to a difference between a desired value and an actual value of the reference parameter, wherein the actual value is determined based on parameters of the volumetric flow of the cooling fluid, possibly with the aid of characteristic fields (42, 46, 74).

Abstract: In a method for operating an internal combustion engine, and a motor vehicle to be heated by the engine coolant, wherein the internal combustion engine has a cooling circuit, a heating mode can be established in which operating parameters of the internal combustion engine, while satisfying required output set values, are set for the maximum possible introduction of heat into the coolant and the exhaust gas in order to reach or hold a desired coolant temperature.

Abstract: A method and a device for the control/regulation of the heat flows caused by heat generators and heat consumers in a motor vehicle, at least on the basis of a momentary load state of the motor vehicle engine and the momentary vehicle operating conditions and ambient conditions. A control/regulation device makes a forecast of the load state of the engine cooling system lying ahead, on the basis of a model that takes into consideration driving condition-relevant quantities and the thermal inertia of the engine cooling system and of engine load-relevant ambient conditions lying ahead, recorded by a satellite navigation system, and carries out a corresponding control/regulation of all heat flows in the motor vehicle, especially of the engine cooling system.

Abstract: A coolant and/or lubricant transport device supplies lubricant or circulating cooling water in internal combustion engines. The pump can be driven by an electric motor which can be controlled in dependence upon a control quantity of a continuous controller. The pump can be temporarily stopped or operated to work with an appropriately reduced output to achieve a desired control value.

Abstract: A thermostatic valve arranged in the coolant circuit of an internal-combustion engine, has a main valve which is acted upon by cold coolant flow on the one side, and by hot coolant flow on the other side. The valve is actuated as a function of the coolant temperature by way of an expansion material element equipped with an electric heating device. To minimize the coldside influence onto the expansion material element, a capsule which stores the expansion material, has an end which limits the expansion material lower at the level of the closed main valve or on the mixing chamber side. At this end, a ring-shaped or sleeve-shaped heating element is arranged coaxially adjacent the control pin, or, individual heating elements are distributed along the circumference of the control pin in an adjacent manner.

Abstract: A direct-fuel-injection-type spark-ignition internal combustion engine has a fuel injection valve which directly injects fuel into a cylinder. A nozzle hole of the fuel injection valve directs fuel toward an impingement portion of the cylinder bore located opposed to the nozzle hole in a lower section of the cylinder bore so that fuel can be injected into a cavity formed in a top face of a piston from an upper section of the cylinder bore during the latter half of a compression stroke. A cooler located at least in the neighborhood of the impingement portion in the lower section of the cylinder bore has a lower cooling capacity than a cooler located in the neighborhood of the upper section of the cylinder bore. Thus, fuel injected during the latter half of an intake stroke that adheres to the cylinder bore can be effectively gasified.

Abstract: A system is provided wherein temperature conduction upon the changing of temperature of cooling water in an engine is forecast, and achievement of a cooling control system with an improved life and reliability and a reduction in cost results therefrom. A butterfly valve for regulating the flow of cooling water is rotatably controlled through a DC motor, a clutch mechanism 33 and a deceleration mechanism 33 so as to cool the engine at an appropriate temperature. A PWM signal generated by a quick response control and a PI control on the basis of at least load information of the engine is supplied to the DC motor 31 from ECU, whereby the butterfly valve 34b is rotatably controlled. A butterfly valve adjusting the flow of cooling water is controlled with the degree of valve opening by a thermo-element enclosing a thermal expansive body such as wax.

Abstract: In an electrically driven coolant pump with an electromotor-pump unit an electronic control unit, generates a pulse-width modulated control signal for the pump depending on at least one engine operating parameter. In order to recognize irregularities and malfunctions in the pump's operation in due time, the control unit is connected with an error detector for the recognition of abnormal control signals and pump operating conditions and with a speed controlling device for the pump speed, with the error detector having an emergency device for the coolant pump.