Internal combustion engine liquid cooling system

Claim 2

A motor vehicle liquid cooling system comprising a pump having an inlet and an outlet, a radiator, a cabin heat exchanger having an inlet and an outlet, a liquid conditioner having an inlet and an outlet, and a flow control valve, said flow control valve being a multiple port valve having a cabin supply port hydraulically connected to said cabin heat exchanger inlet and a liquid conditioner supply port hydraulically connected to said liquid conditioner inlet, said flow control valve being movable to a summer position and to a winter position and to a service position, said flow control valve including valve means establishing fluid pressure communication between said pump outlet and said cabin heat exchanger inlet and establishing fluid pressure communication between said pump outlet and said liquid conditioner inlet when said flow control valve is in said winter position, said valve means closing fluid pressure communication between said pump outlet and said cabin heat exchanger inlet and establishing fluid pressure communication between said pump outlet and said liquid conditioner inlet when said flow control valve is in said summer position, and said valve means closing fluid pressure communication between said pummp outlet and said liquid conditioner inlet when said flow control valve is in said service position.

Claim 3

A motor vehicle liquid cooling system as defined in claim 1 wherein said flow control valve and said liquid conditioner are combined in a single integral unit.

Claim 4

A motor vehicle liquid cooling system as defined in claim 2 wherein said multiple ports of said flow control valve include a conditioner return port hydraulically connected to said liquid conditioner outlet and a pump supply port hydraulically connected to said pump inlet, and said pump supply port is hydraulically connected to said conditioner return port.

Claim 5

A motor vehicle liquid cooling system as defined in claim 2 including an accessory heat exchanger having an inlet and an outlet, said multiple ports of said flow control valve including an accessory supply port hydraulically connected to said accessory heat exchanger inlet, and said valve means establishes fluid pressure communication between said pump outlet and said accessory heat exchanger inlet when said flow control valve is in said summer position and when said flow control valve is in said winter position.

Claim 6

A motor vehicle liquid cooling system comprising a pump having an inlet and an outlet, a radiator, a cabin heat exchanger having an inlet and an outlet, an accessory heat exchanger having an inlet and an outlet, a flow control valve, and fluid connection means hydraulically connecting said pump and radiator and cabin heat exchanger and accessory heat exchanger and flow control valve, said flow control valve being a multiple port valve having a cabin supply port hydraulically connected to said cabin heat exchanger inlet and an accessory supply port hydraulically connected to said accessory heat exchanger inlet, said flow control valve being movable to a summer position and to a winter position, said flow control valve including valve means establishing fluid pressure communication between said pump outlet and said cabin heat exchanger inlet and establishing fluid pressure communication between said pump outlet and said accessory heat exchanger inlet when said flow control valve is in said winter position, and said valve means closing fluid pressurE communication between said pump outlet and said cabin heat exchanger inlet and establishing fluid pressure communication between said pump outlet and said accessory heat exchanger inlet when said flow controll valve is in said summer position.

Claim 7

A motor vehicle liquid cooling system comprising a pump having an inlet and an outlet, a radiator, a cabin heat exchanger having an inlet and an outlet, an accessory heat exchanger having an inlet and an outlet, a flow control valve, and fluid connection means hydraulically connecting said pump and radiator and cabin heat exchanger and accessory heat exchanger and flow control valve, said flow control valve being a multiple port valve having a cabin supply port hydraulically connected to said cabin heat exchanger inlet and an accessory supply port hydraulically connected to said accessory heat exchanger inlet, said flow control valve being movable to a summer position and to a winter position, said flow control valve including valve means establishing fluid pressure communication between said pump outlet and said cabin heat exchanger inlet and establishing fluid pressure communication between said pump outlet and said accessory heat exchanger inlet when said flow control valve is in said winter position, and said valve means closing fluid pressurE communication between said pump outlet and said cabin heat exchanger inlet and establishing fluid pressure communication between said pump outlet and said accessory heat exchanger inlet when said flow controll valve is in said summer position.

Claim 8

A motor vehicle liquid cooling system as defined in claim 5 including a liquid conditioner having an inlet and an outlet, said multiple ports of said flow control valve including a liquid conditioner supply port hydraulically connected to said liquid conditioner inlet, said flow control valve being movable to a service position, said valve means hydraulically isolating said pump outlet from said liquid conditioner inlet when said flow control valve is in said service position, and said flow control valve and said liquid conditioner being combined together in a single integral unit.

Claim 9

A motor vehicle liquid cooling system as defined in claim 6 wherein said multiple ports of said flow control valve include a conditioner return port hydraulically connected to said liquid conditioner outlet, said multiple ports of said flow control valve include a pump supply port hydrulically connected to said pump inlet, and said pump supply port is hydraulically connected to said conditioner return port.

Claim 10

A motor vehicle liquid cooling system as defined in claim 7 wherein said multiple ports of said flow control valve include an exchanger return port hydraulically connected to at least one of said heat exchanger outlets, and said exchanger return port is hydraulically connected to said pump supply port.

Claim 11

In a motor vehicle liquid cooling system, a control valve comprising a valve body, a bore extending through said valve body, a heater section disposed at one end of said bore, a conditioner section disposed at the other end of said bore, an intermediate section disposed along said bore between said heater section and said conditioner section, and valve spool means axially movable in said bore to a summer position and to a winter position and to a service position; said intermediate section including a pump return port hydraulically connected to said bore and an accessory supply port hydraulically connected to said bore; said heater section including a cabin heat exchanger supply port hydraulically connected to said bore, said valve spool means opening fluid pressure communication between said pump return port and said cabin heat exchanger supply port when said valve spool means is in said winter position; said valve spool means closing fluid pressure communication between said pump return port and said cabin heat exchanger supply port when said valve spool means is in said summer position; said conditioner section including a conditioner supply port hydraulically connected to said bore, said valve spool means opening fluid pressure communication between said pump return port and said conditioner supply port when said valve spool means is in said summer position and when said valve spool means is in said summer position and when said valve spool means is in said winter position, said valve spool means closing fluid pressure communication between said pump return port and said conditioner supply port when said valve spool means is in said service position.

Claim 12

In a motor vehicle liquid cooling system, a control valve comprising a valve body, a bore extending through said valve body, a heater section disposed at one end of said bore, a conditioner section disposed at the other end of said bore, an intermediate section disposed along said bore between said heater section and said conditioner section, and valve spool means axially movable in said bore to a summer position and to a winter position and to a service position; said intermediate section including a pump return port hydraulically connected to said bore and an accessory supply port hydraulically connected to said bore; said heater section including a cabin heat exchanger supply port hydraulically connected to said bore, said valve spool means opening fluid pressure communication between said pump return port and said cabin heat exchanger supply port when said valve spool means is in said winter position; said valve spool means closing fluid pressure communication between said pump return port and said cabin heat exchanger supply port when said valve spool means is in said summer position; said conditioner section including a conditioner supply port hydraulically connected to said bore, said valve spool means opening fluid pressure communication between said pump return port and said conditioner supply port when said valve spool means is in said summer position and when said valve spool means is in said summer position and when said valve spool means is in said winter position, said valve spool means closing fluid pressure communication between said pump return port and said conditioner supply port when said valve spool means is in said service position.

Claim 13

A control valve as defined in claim 9 including a fluid conditioner, said fluid conditioner and said flow control valve being combined together in a single integral unit, and said fluid conditioner having an inlet hydraulically connected to said conditioner supply port.

Claim 14

A control valve as defined in claim 10 wherein said conditioner section includes a pump return port, and said fluid conditioner includes an outlet hydraulically connected to said pump return port.

Claim 15

A control valve as defined in claim 9 wherein said conditioner section includes a pump supply port and a conditioner return port hydraulically connected to one another.

Claim 16

A control valve as defined in claim 12 including a one-way check valve interposed between said pump supply port and said conditIoner return port preventing flow in a direction from said pump supply port to said conditioner return port.

Claim 17

A control valve as defined in claim 12 wherein said conditioner section icludes at least one accessory return port hydraulically connected to said pump supply port.

Claim 18

A control valve as defined in claim 9 wherein said bore extends axially through said body, and said pump return port and accessory supply port and cabin heat exchanger supply port each extend radially outwardly from said bore. 16.A control valve as defined in claim 15 wherein said conditioner supply port extends axially from said other end of said bore.

Claim 19

A control valve as defined in claim 16 wherein said valve body includes a first valve seat in said bore between said pump return port and said cabin heat exchanger supply port and a second valve seat in said bore between pump return port and said conditioner supply port.

Claim 20

An internal combustion engine liquid cooling system comprising a pump having an inlet and an outlet, a radiator, a heat exchanger having an inlet and an outlet, a liquid conditioner having an inlet and an outlet, and a flow control valve, said flow control valve and liquid conditioner being combined in a single integral unit, said flow control valve being a multiple port valve having a heat exchanger supply port hydraulically connected to said heat exchanger inlet and a liquid conditioner supply port hydraulically connected to said liquid conditioner inlet, said flow control valve being movable to a first position and to a second position and to a service position, said flow control valve including valve means establishing fluid pressure communication between said pump outlet and said heat exchanger inlet and establishing fluid pressure communication beteen said pump outlet and said liquid conditioner inlet when said flow control valve is in said second position, said valve means closing fluid pressure communication between said pump outlet and said heat exchanger inlet and establishing fluid pressure communication between said pump outlet and said liquid conditioner inlet when said flow control valve is in said first position, and said valve means closing fluid pressure communication between said pump outlet and said liquid conditioner inlet when said flow control valve is in said service position.

Claim 21

An internal combustion engine liquid cooling system comprising a pump having an inlet and an outlet, a radiator, a heat exchanger having an inlet and an outlet, a liquid conditioner having an inlet and an outlet, and a flow control valve, said flow control valve and liquid conditioner being combined in a single integral unit, said flow control valve being a multiple port valve having a heat exchanger supply port hydraulically connected to said heat exchanger inlet and a liquid conditioner supply port hydraulically connected to said liquid conditioner inlet, said flow control valve being movable to a first position and to a second position and to a service position, said flow control valve including valve means establishing fluid pressure communication between said pump outlet and said heat exchanger inlet and establishing fluid pressure communication beteen said pump outlet and said liquid conditioner inlet when said flow control valve is in said second position, said valve means closing fluid pressure communication between said pump outlet and said heat exchanger inlet and establishing fluid pressure communication between said pump outlet and said liquid conditioner inlet when said flow control valve is in said first position, and said valve means closing fluid pressure communication between said pump outlet and said liquid conditioner inlet when said flow control valve is in said service position.

Claim 22

An internal combustion engine liquid cooling system as defined in claim 18 wherein said multiple ports of said flow control valve include a conditioner return port hydraulically connected to said liquid conditioner outlet and a pump supply port hydraulically connected to said pump inlet, and said pump supply port is hydraulically connected to said conditioner return port.

Claim 23

An internal combustion engine liquid cooling system as defined in claim 18 including another heat exchanger having an inlet and an outlet, said multiple ports of said flow control valve including another heat exchanger supply port hydraulically connected to said other heat exchanger inlet, and said valve means establishes fluid pressure communication between said pump outlet and said other heat exchanger inlet when said flow control valve is in said first position and when said flow control valve is in said second position.