Cooling system for automotive internal combustion engine

Internal-combustion engines – Cooling – Interrelated coolant flow and throttle control

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F01P 716

Patent

active

044845413

ABSTRACT:
A cooling system for a liquid cooled automotive internal combustion engine comprises a first device responsive to the temperature of engine coolant flowing through a first section of a coolant passage leading to a radiator. Additionally, a second device is provided to be operative in response to the first device to control the flow of the coolant flowing through a second section of the coolant passage which second section is located downstream of the first section and upstream of a coolant pump. The second device is constructed and arranged to block the coolant passage second section at one of a low engine load operating range and a no engine load operating range when the coolant temperature is over a first predetermined level and not higher than a second predetermined level which is higher than the first predetermined level, while to allow the coolant flow through the coolant passage second section at all engine operating ranges when the coolant temperature is over the second predetermined level. Accordingly, fuel economy and hydrocarbon exhaust emission are effectively improved.

REFERENCES:
patent: Re16437 (1926-10-01), Rayfield
patent: 1418397 (1922-06-01), Rayfield
patent: 1925352 (1933-09-01), Twombly

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