Cooling system for automotive engine

Patent · Tue Jul 22 00:00:00 EDT 1986

OSTI ID:5476322

Hirano, Y

An internal combustion engine: a structure subject to heat flux; and a cooling system is described which consists of: a cooling circuit which includes: (a) a coolant jacket formed about the structure subject to high heat flux and into which coolant is introduced in liquid form, permitted to boil and discharged in gaseous form, (b) a radiator exposed to a cooling medium which can remove heat from the radiator, (c) a vapor transfer conduit leading from the coolant jacket to the radiator for transferring gaseous coolant from the coolant jacket to the radiator for condensation therein, and (d) means for returning coolant condensed to its liquid state in the radiator to the coolant jacket in a manner to maintain the structure immersed in a predetermined depth of coolant; a first sensor for sensing a parameter which varies with the temperature of the coolant in the coolant jacket; a second sensor for sensing a parameter which varies with load on the engine; a reservoir containing liquid coolant; valve and conduit means for controlling fluid communication between the reservoir and the cooling circuit; a device for increasing the rate of heat exchange between the cooling medium and the radiator; and a control circuit responsive to the outputs of the first and second sensors, the control circuit including means for: (a) controlling the valve and conduit means in a manner to control the amount of liquid coolant in the radiator and therefore the amount of surface area via which the latent heat of evaporation of the coolant vapour can be released, and (b) controlling the device in a manner to vary the rate of heat exchange between the radiator and the cooling medium.

• Assignee: Nissan Motor Co., Ltd., Yokohama City
• Patent Number(s): US 4601264
• OSTI ID: 5476322
• Resource Relation: Patent File Date: Filed date 16 May 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
COOLING SYSTEMS
VEHICLES
BOILING
COOLANTS
HEAT FLUX
HEAT TRANSFER
RADIATORS
TEMPERATURE MEASUREMENT
VALVES
VAPOR CONDENSATION
VAPORIZATION HEAT
CONTROL EQUIPMENT
ENERGY SYSTEMS
ENERGY TRANSFER
ENGINES
ENTHALPY
EQUIPMENT
FLOW REGULATORS
HEAT ENGINES
HEAT EXCHANGERS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
330100* - Internal Combustion Engines