Internal-combustion engines – Cooling – Interrelated coolant flow and throttle control
Patent
1999-02-16
2000-08-29
Argenbright, Tony M.
Internal-combustion engines
Cooling
Interrelated coolant flow and throttle control
123 4108, 123 4111, 123 4112, F01P 714
Patent
active
061092193
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a device for controlling a cooling system of an internal combustion engine and a method for controlling the cooling system of the internal combustion engine in which a circulation passage for a coolant is defined in an internal combustion engine such as an automobile engine or the like and more particularly to a device and a method for controlling a device and a method for controlling the temperature of the coolant to be circulated within the internal combustion engine to remain in an optimum state.
2. Description of the Related Art
In an automobile internal combustion engine (hereinafter referred to as the "engine "), a water cooled type cooling system in which a radiator is provided for cooling the engine is generally used.
In a cooling system of this kind, there is used a thermostat employing a thermal expansion body for controlling the volume of cooling water circulated to the radiator side for controlling the temperature of the cooling water to be introduced into the engine, or a valve unit for controlling the same electrically.
FIG. 13 shows one example of a cooling device using an electrically controlled valve unit.
The numeral 1 denotes an engine composed of a cylinder block 1a and a cylinder head 1b which define circulation passages therewithin as shown by arrows c.
The numeral 2 denotes a heat exchanger or a radiator which is formed with a known fluid passage 2c, radiator 2 being further formed with a cooling water inlet 2a and a cooling water outlet 2b. Radiator 2 is connected to the engine 1 via a cooling water passage 3 which circulates the cooling water.
The cooling water passage 3 is composed of an outlet side cooling water passage 3a communicating the cooling water outlet 1d provided in the upper portion of the engine with the cooling water inlet 2a provided in the upper portion of said radiator 2, an inlet side cooling water path 3b communicating the cooling water outlet 2b provided in the lower portion of the radiator with the cooling water inlet 1e provided in the lower portion of the engine 1, and a bypass 3c forming an intermediate portions of said cooling water passages 3a and 3b.
Combination of all of said engine 1, radiator 2 and the cooling water passage 3 completes a circulation passage 4 of the coolant. Then, an electrically controlled valve unit 5 is connected to the inlet side cooling water passage 3a between a branch- off portion of the bypass 3c and the cooling water inlet 2a of the radiator 2.
A butterfly valve or the like is used for said valve unit 5, which is operated to open and close through forward and reverse rotations of an electric motor or the like (not shown) installed in the valve unit such that the volume of the flow of the cooling water to be supplied to the radiator 2 is controlled.
On the other hand, there is provided a temperature detecting element 6 in the form of a thermister or the like at the connection of the inlet side cooling water passage 3b and the bypass 3c. Values detected by said temperature detecting element 6 are converted by a converter 7 into data recognizable by an engine control unit 8 (hereinafter referred to as ECU) so as to be supplied to said ECU 8 which controls the overall operation of the engine.
From said ECU 8, there are supplied control signals obtained on basis of the values of the temperatures of the cooling water detected by the temperature detecting elements 6 to a motor control circuit 9, which is constructed such that a drive current is supplied to the motor provided in the valve unit 5 from a battery 10 by the control signals from the ECU 8.
Further, FIG. 13 shows a water pump 11 provided at the inlet portion 1e of the engine 1 such that the cooling water is forced to be circulated by the revolution of a crankshaft (not shown) of the engine 1. Further, the numeral 12 denotes a fan unit for forcibly introducing a cooling air to the radiator 2, said fan unit 12 being composed of the cooling fan 12a and the motor 12b for driving the same.
I
REFERENCES:
patent: 4369738 (1983-01-01), Hirayama
patent: 4381736 (1983-05-01), Hirayama
patent: 4475485 (1984-10-01), Sakakibara et al.
patent: 4539942 (1985-09-01), Kobayashi et al.
patent: 4726324 (1988-02-01), Itakura
patent: 4726325 (1988-02-01), Itakura
patent: 4759316 (1988-07-01), Itakura
patent: 4798177 (1989-01-01), Oomura et al.
patent: 4964371 (1990-10-01), Maeda et al.
patent: 4977862 (1990-12-01), Aihara et al.
patent: 5036803 (1991-08-01), Nolting et al.
patent: 5111775 (1992-05-01), Sumida et al.
patent: 5390632 (1995-02-01), Ikebe et al.
patent: 5427062 (1995-06-01), Chamot et al.
patent: 5482010 (1996-01-01), Lemberger et al.
patent: 5582138 (1996-12-01), Ziolek et al.
patent: 5609125 (1997-03-01), Ninomiya
patent: 5979373 (1999-11-01), Sano
Sweden--Abstract of 9200873-9. See PCT Search Rpt.
Argenbright Tony M.
Huynh Hai
Nippon Thermostat Co., Ltd.
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