US Patent No: 4,348,990

Number of patents in Portfolio can not be more than 2000

Apparatus for regulating the rotation of a hydraulically-operated cooling fan

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Importance

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Abstract

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A regulation apparatus for determining the flow of fluid to a hyraulically-operated cooling fan of an air-cooled internal combustion engine includes an electromagnetic valve connected in the fluid line to the cooling fan, a control unit which sends a signal to the electromagnetic valve to control its operation, and multiple sensor elements which are positioned in or near the engine to detect the various parameters which affect its operation, the sensor elements sending electrical input signals to the control unit.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
KLOCKNER-HUMBOLDT-DEUTZ AGBOTH OF405

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arbeiter, Erich Plochingen, DE 2 29
Nolte, Albert Cologne, DE 5 37
Schleiermacher, Herbert Bruhl, DE 11 68

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MERCK & CO., INC. (1)
4,665,052 Renin inhibitors containing homophe.sup.8 and a C-terminal amide cycle 6 1984
 
ROBERT BOSCH GMBH (1)
4,223,654 Method and apparatus for controlling the operation of a diesel engine 45 1977
 
ZAHNRADERFABRIK RENK AKTIENGESELLSCHAFT (1)
4,325,330 Apparatus for controlling the cooling system of a motor-vehicle drive 10 1979

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
ROCKFORD POWERTRAIN, INC. (5)
4,489,680 Engine temperature control system 29 1984
5,667,045 Continuously variable fan drive clutch arrangement 32 1995
5,947,247 Continuously variable fan drive clutch 16 1997
5,937,979 Continuosly variable fan drive clutch 18 1997
5,855,266 Fan clutch for vehicles configured for low engine speed 9 1997
 
VOITH TURBO GMBH & CO. KG (2)
6,910,330 Method for controlling the power consumption of a hydrodynamic clutch by controlling the volumetric efficiency and a hydrodynamic clutch 0 2001
7,254,942 Temperature-monitored hydrodynamic machine 0 2005
 
AGENCY FOR DEFENSE DEVELOPMENT (1)
6,591,174 Cooling system controller for vehicle 12 2001
 
DANFOSS POWER SOLUTIONS INC. (1)
5,531,190 Electrohydraulic fan control 18 1994
 
Kabushiki Kaisha Komatsu Seisakusho (1)
4,479,532 A system for controlling a hydraulic cooling fan for an engine as a _function of ambient and coolant temperatures 11 1981
 
KHD Canada, Inc. (1)
4,487,169 Electronic control unit for internal combustion engines 2 1982
 
Nippondenso Co., Ltd. (1)
4,475,485 Engine cooling system control apparatus 47 1983
 
SHIN CATERPILLAR MITSUBISHI LTD. (1)
6,918,248 Independent metering valve assembly for multiple hydraulic load functions 0 2001
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (1)
4,798,177 System for controlling rotational speed of hydraulically driven cooling fan of internal combustion engine, responsive to engine coolant and also fan propellant temperature 18 1987
 
Other [Check patent profile for assignment information] (1)
4,461,246 Hydraulically operated fan assembly for a heat exchange assembly 13 1982