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Thermostat for an engine cooling system

An engine cooling, cooling system technology, applied in the direction of engine cooling, engine components, machine/engine, etc., can solve problems such as reducing fuel economy and passenger discomfort

Inactive Publication Date: 2012-12-26
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Slower engine warm-up can result in reduced fuel economy and passenger discomfort in cold weather and is thus undesirable

Method used

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  • Thermostat for an engine cooling system
  • Thermostat for an engine cooling system
  • Thermostat for an engine cooling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] refer to figure 1 and image 3 , shows a prior art outlet-controlled cooling system installed on the engine 1 .

[0035] This cooling system comprises a circulation pump 2 that circulates the coolant in the engine 1 and the cooling system, a thermostat 3 controlled by the temperature of the coolant leaving the engine 1, a heat exchanger in the form of a radiator 4 in the form of a degassing bottle 5 air extractor, and cab heater 6.

[0036] When the thermostat is open, coolant flows from the thermostat 3 to the radiator 4 via the top hose TH, and from the radiator 4 to the pump 2 via the bottom hose BH. When the engine 1 is cold and the thermostat 3 is closed, the coolant flows through the bypass line BL connecting the thermostat 3 and the pump 2 in order to maintain sufficient flow through the cylinder head. When the thermostat 3 is closed, no coolant flows through the degassing bottle 5 and therefore no cold coolant leaks from the radiator 4 into the engine 1 .

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PUM

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Abstract

A thermostat assembly includes first and second chambers 110, 111 separated by a thermally conductive dividing wall 115. A temperature responsive valve assembly 220 is located in the second chamber to control the flow from an inlet 117 to an outlet. The temperature responsive valve assembly 220 includes a temperature responsive actuator 222 thermally connected to the dividing wall 115 so that its operation is based not only on the temperature of the coolant in the second chamber 111 but also on the temperature of the coolant in the first chamber 110.

Description

technical field [0001] The present invention relates to cooling systems for internal combustion engines and, more particularly, to thermostats for use in such cooling systems. Background technique [0002] It is known that the location of a thermostat in an engine cooling circuit or system is a compromise between the respective problems posed by outlet control or inlet control. [0003] Outlet controlled thermostats are commonly used in diesel engines, such thermostats allow rapid engine warm up, but respond slower to changes in overall engine coolant temperature. These thermostats typically cause large swings in coolant temperature as the engine warms up to its normal operating temperature. Such large temperature swings create high thermal stresses in the engine and are not desirable for all-aluminum engines that are susceptible to thermal fatigue. [0004] Inlet controlled thermostats, on the other hand, have a quick response to changes in the overall engine coolant temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01P7/16
CPCF16K31/002F01P2070/00G05D23/022F01P2060/08F01P7/165G05D23/1333
Inventor 约翰·莫法特
Owner FORD GLOBAL TECH LLC