JPS58204920A - Device for introducing engine-cooling water - Google Patents

Abstract

PURPOSE:To simplify the introduction of water and effectuate mixing at a constant ratio, by connecting an additive delivery pipe and a water delivery pipe to the water introduction port of a radiator through a coupling head and by controlling the flow rates of the water and the additive depending on the concentration of the additive and by making their delivery durations almost the same. CONSTITUTION:A water tank 1 and an additive tank 2 are connected to the outlet port 8 of a coupling head 4 through delivery pipes 5, 6 fitted with feed pumps 21, 23. The water delivery pipe 5 is provided with orifices 30a, 30b in parallel. The additive delivery pipe 6 is provided with orifices 33a-33e in parallel. The pipes 5, 6 are switched to the orifices by solenoid valves 22a, 22b, 32a-32e, 33a-33e, etc. so that flow rates are selected. A controller 29, which receives the detected values of level gauges 25-28 placed in the water tank 1 and the additive tank 2, chooses optimal orifices depending on the concentration of the additive to make the delivery durations of the water and the additive almost the same.

Description

[Detailed description of the invention] Regarding a cooling water injection device.

The engine coolant that is injected into the car's radiator contains
Depending on the destination, additives such as antifreeze may be mixed in appropriate amounts. The mixing ratio, that is, the additive concentration varies depending on the weather conditions of the destination, and is usually KO%, ``fD, ψj%, 11
Engine cooling water with different additive concentrations, such as %, is injected into the radiator depending on the respective destination. Conventionally, in order to be able to select cooling water with different additive concentrations and inject it into the radiator, separate tanks for cooling water with each additive concentration were prepared, and one of the tanks was prepared separately. The method used was to select one and inject cooling water into the radiator. However, this conventional method has the disadvantage that space is required for providing a large number of tanks and piping from these tanks, and the piping is also complicated. Furthermore, when starting the engine with water injected into the radiator, and then draining the water from the radiator and injecting cooling water with the required additive concentration, the cooling water must be injected to account for the remaining water in the radiator. There is a problem that the subsequent additive concentration changes.

The present invention aims to solve the above-mentioned problems in an engine coolant injection device for a radiator, and the engine coolant injection device according to the present invention includes an additive tank containing a cooling water additive, A tank, a connection head connectable to an inlet of an automobile radiator, an additive supply pipe □ connecting the additive tank to the connection head, and a water supply pipe connecting the front water distribution tank to the connection head. The additive supply pipe is provided with an additive supply control device that controls the additive supply amount according to the radiator capacity and the additive concentration, and the water supply pipe is provided with an additive supply control device that controls the additive supply amount according to the radiator capacity and the additive concentration. The additive and water are supplied to the radiator from the respective supply pipes through the connection head, and the additive supply control device controls the supply of the additive. It is characterized by having means for controlling the additive feed rate so that the time approximately matches the water feed time.

According to the present invention, it is sufficient to provide two tanks, a water tank and an additive tank, and the additive concentration can be determined arbitrarily by controlling the amount of water and additive supplied from each supply pipe. be able to.

The control device for controlling the supply amount of water and additives is composed of a control valve or a flow rate control motor installed in each supply pipe, and the opening/closing of this control valve or the operation of the flow rate control motor is controlled by the radiator capacity and additives. In order to control according to the concentration, a calculation device capable of performing necessary calculations may be provided. In addition, if necessary, two or more additives,
For example, it is also possible to add antifreeze and rust inhibitors.

Furthermore, in the present invention, the additive supply control device controls not only the supply amount of the additive but also its supply speed so as to match the additive supply time with the water supply time. and water are uniformly mixed. This supply speed control means is constituted by a variable throttle provided in the additive supply pipe, and the supply speed is changed by controlling the variable throttle, or alternatively, a plurality of throttles are provided in parallel in the additive supply pipe, For example, an on-off valve may be combined with each of these apertures so that an appropriate size aperture can be selected and used by opening and closing the on-off valve.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The figure shows an example in which antifreeze is used as an additive, and a water tank 1 and an antifreeze tank 2 are provided to contain required amounts of water and antifreeze. Furthermore, a connection head 4 is provided which is connected to the inlet 3a of the radiator 3, and this connection head 4 is connected to the water tank 1 by a water supply pipe 5 and to the antifreeze tank 2 by an antifreeze supply pipe 6, respectively.

A switching valve 7 is provided in the connection head 4 and a supply pipe 5.6
is connected to the discharge port 8 of the head 4 via this switching valve 7. In this example, a rust preventive tank 2a is further provided, and this rust preventive tank 2a is connected to a switching valve 7 through a rust preventive supply pipe 6a, and the switching valve 7 connects this supply pipe 6a to a discharge port 8. It also acts to connect. As shown in the figure, by connecting the supply pipe 5.6.6a to one collecting pipe 5a and connecting this collecting pipe 5a to the switching valve 7, the number of boats of the switching valve 7 can be reduced.

The connection head 4 is further provided with a suction port 8, and this suction port 9 is connected to a suction pipe 11 via a switching valve 1a provided within the head 4. A vacuum tank 12 is provided above the water tank 1, and this vacuum tank 12 is connected to a vacuum line 13.
It is connected to the vacuum pump 14 by. The vacuum tank 12 is also connected to the upper part of the water tank 1 and the suction pipe 11 . The switching valves T110 are pneumatically operated, and in order to operate these switching valves T110, air pressure supply pipes IT and 1B are provided, respectively, from the air pressure source 15 to the switching valve 1.10 via the pressure regulator 16. .

A solenoid valve 19 is provided on the pneumatic supply pipe 1T leading to the switching valve 7, and when the solenoid valve 19 is energized, the winter switching valve 7 is activated to connect the supply pipe 5.6.6a to the discharge port 8. . Similarly, the air pressure supply pipe 18 is provided with a solenoid valve 20, and when the solenoid valve 20 is energized, the switching valve 10 is operated to connect the suction pipe 11 to the suction port 9. The suction pipe 11 and the suction port 9 are for discharging the air inside the radiator 3 according to the amount t of the liquid supplied from the discharge port 8, and preventing the pressure inside the radiator from becoming too high.

A water supply pump 21 is provided in the water supply pipe 5, and further downstream from the pump 21 is a parallel branch flow path 5a.

5b, and on-off valves 22a, 22b and throttles 30a, 130t) are arranged in each of the branch channels 5a and 5b, respectively. The on-off valves 22a, 22b are of the type that are opened and closed by air pressure, and a solenoid valve 38a is used to control the opening and closing.
, 38b are provided, respectively. The throttles 30a and 30b have different sizes and function to control the flow rate of water passing through the branch channels 5a and 5b per unit time. This aperture is used by switching according to the concentration of the antifreeze solution.

The antifreeze supply pipe 6 is provided with an antifreeze supply pump 23 and a flow rate control pump 24 whose rotation speed changes depending on the frequency of the applied current. Furthermore, the supply pipe 6 includes branch channels 31a and 31b arranged in parallel.

31 c, 31 d, and 31 e, and the respective branch channels include pneumatically operated on-off valves 32 a, 32 b, 32 c,
32 d, 32θ, and apertures 33 of different sizes
a, 33 b, 33 c, 33 d, 3
3 e is placed. On-off valve 32a, 32
b, 32 c.

Solenoid valves 39a, 39b, 39c, 39d for controlling the supply of operating compressed air to 32d, 32θ.

39θ is provided. Therefore, by opening an appropriately selected on-off valve, the flow rate of the antifreeze solution per unit time through the supply pipe 6 can be controlled using a restriction of a desired size.

The rust preventive supply pipe 6a is provided with a rust preventive pump 34, a pump 35 whose rotational speed changes depending on the frequency of the applied current, and an on-off valve 36, and a throttle 37 is arranged as necessary. . A solenoid valve 40 is provided to control the supply of operating compressed air to the on-off valve 36. Level gauges 25 and 26 are provided in the water tank 1, and level gauges 21 and 28 are provided in the antifreeze tank 2.

A control device f129 is provided for electrical control.

This ftIIJ I'llll system [29 may be configured by a microcomputer, for example, and the level gauge 2
The outputs of 5.26.27.28 are connected to this control device 29. The control device 29 performs necessary calculations based on the capacity of the radiator 3 and the desired antifreeze concentration, determines the supply amount of water and antifreeze, and controls the vacuum pump 14 and the pump 2.
1.23.34, and solenoid valve 19.20.38.39.
4o, respectively, to supply water, antifreeze, and rust preventive to the radiator 3. At this time, the solenoid valve 38
a138b and solenoid valves 39a, 39b, 39c, 39d
.

39e is energized as appropriate depending on the radiator capacity and additive concentration so that the supply of water and antifreeze begins and ends at approximately the same time.

As described above, according to the present invention, separate tanks are provided for engine cooling water and additives such as antifreeze added to this water, and these tanks are connected to the water supply pipe and the additive, respectively. The agent supply pipes are connected to a connection head connected to the inlet of the radiator, and each supply pipe is provided with a respective feed rate control device to supply water and additives according to the radiator capacity and the desired additive concentration. Since the concentration of the additive is controlled, there is no need to prepare cooling water with different concentrations of additives in advance, and there is no need to provide multiple cooling water tanks and associated piping. Further, since the required amount of water and additive are supplied according to the radiator capacity and additive concentration, it is possible to accurately control the additive concentration. Further, since the additive supply control device operates as a means for controlling the additive supply rate so that the additive supply time approximately matches the water supply time, the water and additive are mixed uniformly.

[Brief explanation of drawings]

The drawing is a schematic diagram of an engine coolant injection device showing an embodiment of the present invention. 1...Water tank 2...Antifreeze tank 3...Radiator 4...Connection head 7...Switching valves 22a, 22b... ...On-off valves 32a, 32b132c, 32d, 32e =--On-off valves 38a, 38b...Solenoid valves 39a, 39b, 39c, 39d, 39e--Solenoid valve 29...・Control device patent applicant Toyo Kogyo Co., Ltd. 112-

Claims (3)

[Claims] (1) an additive tank accommodating a cooling water additive, a water tank, a connection head connectable to an inlet of a radiator of an automobile, and an additive supply pipe connecting the additive tank to the connection head; a water supply pipe connecting the water tank to the connection head, and the additive supply pipe is provided with an additive supply control device for controlling the additive supply amount depending on the radiator capacity and additive concentration. , the water supply pipe is provided with a water supply amount control device for controlling the water supply amount according to the radiator capacity and the additive concentration, and the additive and water are supplied from the respective supply pipes to the radiator through the connection head. An engine cooling water injection device characterized in that the additive supply control device has means for controlling an additive supply rate so that the additive supply time substantially coincides with the water supply time. (2) The engine cooling water injection device according to item 1, wherein the supply speed control means includes a variable throttle provided in the additive supply pipe. (3) The engine cooling water injection device according to item 1, wherein the supply speed control means includes a plurality of parallel throttles provided in the additive supply pipe and an on-off valve associated with each throttle.