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| Number | Title | Issue Date |
| 7347167 | Method for controlling cooling fans A method for controlling a cooling system for an internal combustion engine having first and second cooling fans is provided, comprising operating the first cooling fan at a first rotational frequency which is greater than a combustion frequency of the internal comb... | 03/25/2008 |
| 7333308 | Control arrangement A control arrangement is operable to control an electrical relay to supply current. The arrangement comprises current supply means and control means operable to provide a relay make signal and a relay break signal to control the state of the relay to respectively ma... | 02/19/2008 |
| 7256562 | Control circuit for a cooling fan A control circuit for a cooling fan is provided that adjusts input power and drive a cooling fan. The control circuit comprises a temperature detector for detecting temperature; a power controller for controlling driving power to the cooling fan based on the input p... | 08/14/2007 |
| 7253542 | Quiet fan speed control A novel a circuit for driving a fan includes an output terminal for supplying the fan with drive power, a pulse width modulation driver, and a limiter. A first power terminal of the fan is held at a first voltage (e.g., 0V), and a second power terminal of the fan is... | 08/07/2007 |
| 7228204 | Fan unit for forced air cooling, motherboard formed wiring for operating fan unit, and electronic equipment to be fan-cooled The present invention relates to a fan unit used for forced air cooling, a motherboard with predetermined wiring formed as a wiring pattern, disposed on the rear face of an equipment, and an electronic equipment provided with the fan unit and the motherboard. It is ... | 06/05/2007 |
| 7179046 | Fan array fan section in air-handling systems A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units a... | 02/20/2007 |
| 7137775 | Fan array fan section in air-handling systems A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units a... | 11/21/2006 |
| 7131490 | Fan coil controller A fan coil controller for a hot and cold water system of a building that turns off the fan while the hot water and cold water coils are flushed. A fan coil control circuit is configured to periodically and temporarily operate a hot water flow control circuit and a c... | 11/07/2006 |
| 7113376 | Motor control apparatus In a control apparatus for a motor, an over-current protection circuit detects an abnormality in a motor current forcibly turns off a MOSFET. The over-current protection circuit has a timer function and a time switching function. In the timer operation, the over-cur... | 09/26/2006 |
| 7095188 | Serial fan set and rotation speed-matching curve generation method thereof A serial fan set and rotation speed-matching curve generation method thereof are provided. The serial fan set comprises a rotation speed control module, a first fan and a second fan, in which the rotation speed control module is used to receive the power signal and ... | 08/22/2006 |
| 7084594 | Motor drive control apparatus and method having motor current limit function upon motor lock A direct current motor for an engine throttle control is driven with a motor current of 100% duty ratio, when a throttle valve is to be moved from one throttle position to another or when the movement of the throttle valve is to be braked. The motor current is limit... | 08/01/2006 |
| 7066114 | Reverse fan operation for vehicle cooling system A system for reducing the time that it takes a vehicle fuel cell engine to reach its operating temperature at vehicle start-up. The system includes a radiator and a fan, where a cooling fluid from the engine is directed through the radiator where it is cooled by air... | 06/27/2006 |
| 7038342 | Fan motor support A fan motor support bracket has a central body portion and first and second end portions upwardly offset from the central body portion. First and second transition portions extend respectively between the first and second end portion and first and second ends of the... | 05/02/2006 |
| 7038415 | Motor driving device A temperature sensor (33) detects the temperature of a MOS transistor (7), and a current detecting circuit (35) detects current flowing in the MOS transistor (7). When the voltage corresponding to the detected temperature or the voltage c... | 05/02/2006 |
| 7021071 | Method and apparatus for controlling cooling fan of vehicle A driving load of a cooling fan unit is selectively determined from a plurality of predetermined loads corresponding to vehicle parameters including a coolant temperature and a vehicle speed. Also, on the basis of a plurality of coolant temperature ranges and a plur... | 04/04/2006 |
| 7008184 | Control for cooling fan A control for changing direction of air flow through a cooling core in response to an external signal and a purge signal includes a logic circuit and a relay assembly. The logic circuit generates a fan control signal based on the external signal, which causes the fa... | 03/07/2006 |
| 6999906 | Reconfiguration method for a sensor system comprising at least one set of observers for failure compensation and guaranteeing measured value quality The invention relates to a reconfiguration method designed to be implemented in a computer system, for compensating failures of a sensor system (1). The sensor system includes at least one sensor (2, 50) for measuring (12, 22) system states of a... | 02/14/2006 |
| 6970643 | Radiator having a fan in variable rotation speed A radiator includes a voltage regulator for providing a reference voltage, a fan including a power end connected to the reference voltage via a first resistor and a feedback end for outputting a pulse signal indicating the rotation speed of the fan, an integration c... | 11/29/2005 |
| 6955150 | Method and apparatus for efficiently cooling motorcycle engines A method for managing oil temperature for a vehicle engine comprises the steps of (a) determining a preferred temperature window for oil in operation of the vehicle, comprising a first, lower temperature, and a second, higher temperature; (b) pumping oil from the ve... | 10/18/2005 |
| 6933687 | Dual motor configuration with primary brushless motor and secondary integrated speed control motor A dual motor configuration 10 is provided for driving two fans for moving air to cool an engine. The dual motor configuration includes a primary brushless motor 18 constructed and arranged to be electronically controlled to drive a first fan 16 ... | 08/23/2005 |
| 6924568 | Quiet fan speed control A novel a circuit for driving a fan includes an output terminal for supplying the fan with drive power, a pulse width modulation driver, and a limiter. A first power terminal of the fan is held at a first voltage (e.g., 0V), and a second power terminal of the fan is... | 08/02/2005 |
| 6910346 | Heat pump temperature control device for motor vehicle The device includes a heat pump integrating a refrigerant circuit taking calories from a cold source to transfer them towards a warm source. The device also includes a heat-conducting fluid/air thermal exchanger called external exchanger (30), located in the ... | 06/28/2005 |
| 6824067 | Method of cooling engine coolant flowing through a radiator A method is provided for facilitating the cooling of engine coolant flowing through a radiator operatively connected to the engine. The method includes the steps of monitoring the temperature of the engine coolant flowing through the radiator and positioning a fan a... | 11/30/2004 |
| 6374780 | Electric waterpump, fluid control valve and electric cooling fan strategy A method and apparatus for controlling engine temperature in a closed circuit cooling system 12 of an automobile 10 having an electric water pump 34, a flow control valve 42, and electric fan 40. A powertrain control module 20 electrically coupled to the ... | 04/23/2002 |
| 6336592 | Thermal control for a test and measurement instrument A cooling system for a test and measurement instrument including a variable-speed fan, useful with different instruments having different configurations, employs a plurality of sensors disposed at predetermined locations within an enclosure of the instrum... | 01/08/2002 |
| 6337949 | System for controlling an electric motor of a fan associated with heat exchangers in a motor vehicle The system comprises a pressure sensor for providing a signal indicative of the pressure of the refrigerant fluid of the air-conditioning system at the output or delivery of the compressor of the system, a sensor for detecting the temperature of the liqui... | 01/08/2002 |
| 6182902 | Device and method for automatically controlling rotating speed of fan cooler A thermal control method and device for automatically regulating the rotational speed of the fan cooler are disclosed in the present invention. The thermal control device comprises a control-voltage generator having a temperature-sensing device for sensin... | 02/06/2001 |
| 6126079 | Fan control A fan control system for a vehicle cooling system includes forward and reverse relays connected to a microprocessor based timer control. A third relay is controlled by a single temperature responsive switch or thermostat and selects either the high speed ... | 10/03/2000 |
| 6016965 | Vehicle cooling system with electric motor overcurrent inhibiting control A vehicle cooling system including a motor control apparatus that controls operation of a system motor when a cooling fan driven by the motor locks due to foreign matter interference or freezing. When motor input current is detected to be overcurrent, the... | 01/25/2000 |
| 5947189 | Heat exchanging system having cooling fan, for vehicle A heat exchanging system includes two cooling fans for cooling heat exchanging medium of a heat exchanger, and a control device for controlling rotational speeds of the cooling fans. The control device is attached to an outer surface of a fan shroud so th... | 09/07/1999 |
| 5778693 | Automotive hydraulic engine cooling system with thermostatic control by hydraulic actuation An engine cooling system and method and apparatus for controlling hydraulic fluid flow between a plurality of hydraulic components in a hydraulic system is shown. The system and method utilized at least one hydraulic sensor for actuating a hydraulic valve... | 07/14/1998 |
| 5718373 | System for controlling automobile cooling fan A system for controlling an automobile cooling fan utilizes a temperature-sensitive negative resistance device having a resistance which decreases as the temperature rises, and which increases as the temperature falls. Thus, if the cooling water temperatu... | 02/17/1998 |
| 5465589 | Idle automated A/C system When the driver parks a truck for the purpose of sleeping in the cab's bunk space and desires to have the air conditioner operate, fan clutch cycling, which may create objectionable noise that disturbs sleep, is avoided by the inclusion of a branch circui... | 11/14/1995 |
| 5307644 | Method and electronic device for controlling engine fan An electronic engine fan control device is disclosed. The control device includes means for detecting engine coolant temperature, operation of the vehicle air conditioning load, and vehicle road speed. The control device also includes means for generating... | 05/03/1994 |
| 4955431 | Cooling device for an internal combustion engine and method for controlling such a cooling device A device and method for cooling an internal combustion engine is disclosed in which a simple control circuit constructed of relatively inexpensive components enables the rotational speed of an electric motor employed in the cooling device to be controlled... | 09/11/1990 |
| 4875521 | Electric fan assembly for over-the-road trucks There is disclosed an over-the-road truck having an internal combustion engine of at least 200 hp including a radiator and an electric fan assembly therefor consisting of an electric motor to which is attached an axial flow propeller fan and operating onl... | 10/24/1989 |
| 4804139 | Cooling system for a water-cooled vehicle engine A cooling system for a water-cooled vehicle engine has a radiator through which cooling water flows and which can be exposed to cooling air by an electric fan (9). A first heat sensor (F1) on the engine block senses the water outflow temperature, while a ... | 02/14/1989 |
| 4687132 | Engine cooling fan coupling system controlled in concert with a cooling system thermostat An automotive vehicle engine having a coolant circulation system with a radiator, a fan, and a thermostatic valve for controlling coolant flow through the radiator. This thermostatic valve starts to open at a first temperature, is fully opened at a second... | 08/18/1987 |
| 4658595 | Cooling system for radiator and condenser of vehicles with an air conditioner and method of operating the same A cooling system for radiator and condenser with an air conditioner having first and second electrically driven blowers for cooling the radiator and condenser, and a cooling cycle operation switch which comprises a control circuit provided on at least one... | 04/21/1987 |
| 4651922 | Apparatus for controlling rotational speed of radiator fan A cooling system for a radiator in an internal combustion engine is provided with a pair of fans connected to a first motor for a small electric current and a second motor for a large electric current, respectively. Relays are provided for operating the f... | 03/24/1987 |
