CONTROL SYSTEM AND CONTROL METHOD FOR FAN

• Main Authors: ALGRAIN MARCELO C, DICKE PAUL A
• Format: Patent
• Language: English
• Published: 27.07.2001
• Edition: 7
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To provide a control system and a method for controlling the speed of a plurality of fans for cooling a plurality of fluids in a working machine. SOLUTION: Speed of respective fans 10, 12 are controlled according to an individual heat dissipating demand of heat transmitting cores 16, 18, 20 cooled by each fan, and a control system includes a plurality of sensors for outputting signals for showing the temperature of each fluid, and an electronic controller connected to a plurality of sensors. On the basis of those temperature signals, an ECM, decides on the temperature error corresponding to each fluid. A signal, showing fan speed which is desired for each fan on the basis of at least some comparisons in temperature error signals as decided by signals of a plurality of sensors, is outputted to a plurality of fans for controlling speed in a plurality of fans by the controller.