ENGINE SYSTEM WITH REVERSIBLE FAN

• Main Authors: PETERSON RANDAL N, PETERSON JEREMY T, NELSON BRYAN E
• Format: Patent
• Language: English
• Published: 06.12.2012
• Subjects: BLASTING; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION; ENGINE PLANTS IN GENERAL; HEAT EXCHANGE IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

An engine system includes an engine, a primary pump coupled to the engine, and a motor fluidly connected to the primary pump. The engine system further includes a heat exchanger fluidly connected to the engine, the heat exchanger configured to accept heated coolant from the engine and deliver cooled coolant to the engine. The engine system also includes a fan driven by the motor in either a forward or a reverse mode of operation, the fan configured to pull air toward the heat exchanger in a first direction during the forward mode of operation to assist in cooling the coolant, and to push air toward the heat exchanger in a second direction opposite the first direction during the reverse mode of operation. The engine system further includes a controller configured to operate the fan in the reverse mode of operation in response to a sensed temperature of the coolant and a speed of the fan in the forward mode of operation.