| 摘要 |
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.
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