US 4,977,862 AGranted

Engine room-cooling control system

AssigneeHonda Giken Kogyo Kabushiki Kaisha

InventorsYasuyuki Aihara, Shuji Katoh, Shigeki Baba, Eitetsu Akiyama

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Abstract

In a cooling control system for controlling cooling of an engine room of an engine, a water pump and/or cooling fans are arranged within the engine room to cool same, and electric motors electrically drive the water pump and cooling fans. A control unit compares a temperature of the engine detected by a temperature sensor with a plurality of different predetermined values, and based upon results of the comparison, controls the electric motors for driving the cooling fans in such a manner that as the detected temperature is higher, the flow rate of cooling air flowing in the engine room is larger. The control unit is operable when abnormality occurs in sensors for sensing operating conditions of the engine, for operating the electric motors to drive the water pump and cooling fans. Alternatively, an analog circuit is operable when abnormality occurs in the control unit, for operating the electric motors to drive the water pump and the cooling fans.

Claims11

Dependent claims

A cooling control system for controlling cooling of an engine and an engine room, comprising:

an engine room accommodating and engine;
cooling means arranged within said engine room for cooling said engine and said engine room, comprising a first cooling fan arranged at a first location within said engine room for cooling said engine, and a second cooling fan arranged at a second location within said engine room, said first cooling fan being capable of being selectively driven for rotation at a predetermined higher speed and at a predetermined lower speed;
driving means for electrically driving said cooling means, comprising first driving means for driving said first cooling fan, and second driving means for driving said second cooling fan;
temperature detecting means for detecting a temperature of said engine;
and
control means for comparing a value of the temperature of said engine detected by said temperature detecting means with a plurality of different predetermined values, and based upon results of the comparison, controlling said first and second driving means for driving said first and second cooling fans in a manner such that said first cooling fan alone is driven for rotation at said predetermined lower speed when the detected value of the temperature of said engine is above a first predetermined value and below a second predetermined value higher than said first predetermined value, said first cooling fan alone is driven for rotation at said predetermined higher speed when the detected value of the temperature of said engine is above said second predetermined value and below a third predetermined value higher than said second predetermined value, and said first cooling fan is driven for rotation at said predetermined higher speed and at the same time said second cooling fan is driven when the detected value of the temperature of said engine is above said third predetermined value.

3 more elements

Dependencies are inferred from the claim text.