JP2003094958A - Engine cooling device for fire engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems of wasting storage water due to draining the storage water in a free flow state in an engine cooling device and causing defectiveness that the storage water drained outside is frozen on a road surface or the like in a cold season such as the winter season. SOLUTION: In this fire engine, a transmission 1 is interlockingly connected to an engine, and a water discharge pump 3 is interlockingly connected to the transmission through a PTO shaft 2 to allow water discharge by the water discharge pump, while a radiator 4 is provided in front of the engine, and a sub-radiator 5 is connected communicating with the radiator to allow the engine to be cooled by both radiators. In this case, the transmission 1 and the sub- radiator 5 are respectively connected communicating with a halfway part of a forced circulating passage for cooling to allow the transmission and sub- radiator to be cooled by a cooling medium flowing in the forced circulating passage for cooling.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an engine cooling device for a fire engine.

[0002]

2. Description of the Related Art Conventionally, FIG.
As shown in FIG. 1, the transmission 1 is linked to the engine E, and the water discharge pump 3 is linked to the transmission 1 via the PTO shaft 2 to enable water discharge by the water discharge pump 3. There is one in which a radiator 4 is provided in front of E, and a sub radiator 5 is continuously connected to the radiator 4, so that the engine E can be cooled by both radiators 4 and 5.

[0003] Here, in a fire engine, the engine E is often driven for a long time while the engine E is stopped, and the radiator 4 alone cannot sufficiently secure the cooling effect of the engine E. Therefore, the sub-radiator is used. 5 is provided,
The water cooled by the radiator 4 is further cooled by the sub radiator 5.

Then, the base end portion of the cooling flow passage 6 is connected to the discharge port of the water discharge pump 3, and the tip end portion of the cooling flow passage 6 is bifurcated to form one branch flow passage. 7 is connected to the transmission 1, and the other branch flow path 8 is connected to the sub radiator 5, and the stored water is sent from the water discharge pump 3 through the cooling flow path 6 to the transmission 1 and the sub radiator 5, respectively. An engine cooling device 9 for cooling the transmission 1 and the sub radiator 5 is provided. 10 is a cooling water main valve, 11 is a cooling water strainer, 12 is a precooling passage, 13 is a cooling water spare valve,
14 is a check valve.

Here, the transmission 1 and the sub radiator 5 are provided with drainage pipes 15 and 16, respectively, and the stored water sent as a cooling medium to the transmission 1 and the sub radiator 5 is cooled, and then the drainage pipes 1 and 16 are drained.
The water is drained to the outside in the state of running through 5,16. 17 shows the drainage direction.

[0006]

However, in the engine cooling device 9 described above, since the stored water is drained in a draining state, the stored water is wasted, and the stored water is externally used in cold weather such as winter. There is a problem that the drained stored water freezes on the road surface.

[0007]

Therefore, in the present invention, a transmission is interlocked with an engine, and a water discharge pump is interlocked with the transmission via a PTO shaft so that water can be discharged by the water discharge pump. On the other hand, in a fire engine in which a radiator is installed in front of the engine and a sub-radiator is continuously connected to the radiator, and the engine can be cooled by both radiators, the transmission and sub (EN) An engine cooling device for a fire engine, in which radiators are connected to each other and a transmission medium and a sub radiator can be cooled by a cooling medium flowing through the cooling forced circulation passage.

The present invention is also characterized by the following configuration.

A part of the forced circulation passage for cooling is arranged in the suction passage and / or the discharge passage of the water discharge pump.

An auxiliary cooler is provided in the return side passage of the forced circulation circulation passage for cooling.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

That is, the fire engine according to the present invention has a basic structure in which a transmission is interlocked with an engine and a water discharge pump is interlocked with the transmission through a PTO shaft, and water is discharged by the water discharge pump. On the other hand, a radiator is installed in front of the engine,
A sub-radiator is connected to the same radiator, and both radiators can cool the engine.

As a characteristic structure, such a fire engine is provided with an engine cooling device. The engine cooling device has a transmission and a sub-radiator in communication with each other in the middle of a forced circulation channel for cooling. The transmission medium and the sub radiator can be cooled by the cooling medium flowing in the forced circulation channel for cooling.

Moreover, a part of the forced circulation channel for cooling is arranged in the suction channel and / or the discharge channel of the water discharge pump.

It is also possible to provide an auxiliary cooler in the return side passage of the forced circulation circulation passage for cooling.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A shows an engine cooling device (characteristic structure of the present invention) as a first embodiment of a fire engine according to the present invention (basic structure is the same as the conventional one). The cooling device A includes a transmission medium 1 and a sub-radiator 5 which are connected to a middle portion of the forced circulation channel 20 for cooling, and a cooling medium such as water flowing through the forced circulation channel 20 for cooling.
21 makes it possible to cool the transmission 1 and the sub radiator 5.

That is, the cooling forced circulation flow passage 20 is formed by a feed side flow passage 22 and a return side flow passage 23, and the feed side flow passage 22 is located at the discharge port of the forced circulation pump P at the base end. The transmission 1 is communicatively coupled to the midway portion of the feed side flow path 22, and the sub radiator 5 is communicatively coupled to the terminal end portion of the feed side flow path 22.

The return-side flow passage 23 has a base end portion connected to the sub-radiator 5, and a midway portion 23a of the return-side flow passage 23 is disposed in the suction flow passage 3a of the water discharge pump 3 to provide a cooling medium storage tank. T
The tip is connected to. a indicates the flow direction of the cooling medium.

Here, in this embodiment, the midway portion 23a of the return side flow path 23 is arranged in the suction flow path 3a of the water discharge pump 3, but it may also be arranged in the discharge flow path 3b. , Both channels 3
The cooling medium 21 in the return side flow path 23 can be smoothly and surely cooled by absorbing and / or discharging water in the water discharge pump 3 in any case. The transmission 1 and the sub radiator 5 can be cooled efficiently.

A pump drive motor M is linked to the forced circulation pump P, and a battery 26 is connected to the pump drive motor M via a relay 24 and a fuse 25. 27
Is a liquid meter, 28 is a cooling medium supply port, and 29 is a drain valve.

Then, temperature detection sensors 30 and 31 are attached to the engine E and the transmission 1, respectively, and these temperature detection sensors 30 and 31 are connected to the input side of the control unit 32, and the output side of the control unit 32 is provided with the above-mentioned. Relay 24 is connected.

In this manner, the temperature detecting sensors 30 and 31 detect the temperatures in the engine E and the transmission 1, actually the temperature of the lubricating oil inside, and when each temperature exceeds a predetermined temperature, the Based on the detection result, the control unit 32 connects the relay 24 to drive the pump driving motor M, and the pump circulating motor M operates the forced circulation pump P to cool the cooling medium 21. The forced circulation is made in the road 20.

As a result, the inside of the transmission 1 and the inside of the sub radiator 5 are cooled, the inside of the engine E is cooled by the sub radiator 5, and the temperatures of the respective lubricating oils inside the transmission 1 and the engine E are lowered.

When the temperature detecting sensors 30 and 31 detect that the lubricating oil in the engine E and the transmission 1 has decreased to a predetermined temperature, the control unit 32 causes the relay 24 to disconnect based on the result. Pump drive motor M
Is stopped, and the forced circulation of the cooling medium 21 is stopped.

FIG. 2 shows an engine cooling device A as a second embodiment. The engine cooling device A has the same basic structure as the engine cooling device A as the first embodiment. However, it is different in that the auxiliary cooler 40 is provided in the middle part of the return side flow path 23 without arranging the middle part 23a of the return side flow path 23 in the suction flow path 3a of the water discharge pump 3.

Here, the auxiliary cooler 40 is an auxiliary radiator.
41 and a cooling fan 42 for cooling the auxiliary radiator 41. The cooling fan 42 includes the relay 24 described above.
It is designed to work in conjunction with the connection operation of.

In this way, the cooling medium 21 forcedly circulated in the cooling forced circulation passage 20 can be cooled smoothly and surely by the auxiliary cooler 40, so that the transmission 1 and the sub radiator can be efficiently used. 5 can be cooled.

FIG. 3 shows an engine cooling device A as a third embodiment. The engine cooling device A has the same basic structure as the engine cooling device A as the first embodiment. However, it is different in that an auxiliary cooler 40 is provided in the middle part of the return side flow path 23 without disposing the middle part 23a of the return side flow path 23 in the suction flow path 3a of the water discharge pump 3.

Here, as shown in FIGS. 4 and 5, the auxiliary cooler 40 has upper and lower partition walls 46 arranged in a cooler case 45 extending in the left-right direction, and an upper layer flow path in the cooler case 45. 47 and the lower layer flow channel 48 and the communication flow channel 49 that communicates the left end portions of both the upper and lower layer flow channels 47, 48 are formed, and both upper and lower layer flow channels 47, 48 are formed.
A large number of cooling water flow passages 50 each extending in the left-right direction
On the right end wall of the cooler case 45
A cooling water outlet 51 and a cooling water inlet 52 are formed in the lower part, respectively, and the cooling water outlet 51 is connected to the cooling water passage 50 arranged in the upper layer flow passage 47, while the cooling water inlet 52 is in the lower layer flow passage 48. The cooling water flow passages 50 arranged in the above are communicated.

The cooling water outlet 51 and the water discharge pump 3
Of the cooling water inflow port 52 and the discharge port 3d of the water discharge pump 3 are connected to each other through a water discharge pipe 54 to form a cooling circulation channel 55. Is forming. b is the flow direction of the cooling water.

Further, the cooling medium flow passage 56 is formed in the space formed between the cooler case 45 and the cooling water flow passage 50, and the cooling medium flow outlet is provided at the lower portion of the peripheral wall of the cooler case 45.
57 and the cooling medium inflow port 58 are formed, and the return side flow path 23 is provided to the cooling medium inflow passage 56 via these cooling medium outflow / inflow ports 57, 58.
The middle part is connected.

In this way, the cooling medium 21 is fed to the return side flow path.
By circulating the cooling water through the cooling medium flow passage 56 through the cooling water circulation passage 55, the cooling water circulating in the cooling circulation flow passage 55 by the water discharge pump 3 flows between the cooling water 21 and the cooling medium 21. The heat exchange is carried out to cool the cooling medium 21.

Therefore, in this case as well, the forced circulation channel for cooling is used.
The cooling medium 21 forcedly circulated in the
Since the cooling can be performed smoothly and surely by 40, the transmission 1 and the sub radiator 5 can be cooled efficiently.

Moreover, since the cooling function of the auxiliary cooler 40 effectively uses the water discharged from the water discharge pump 3 as the cooling water, the engine cooling device A can be manufactured with a simple structure and at a low cost.

[0036]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the transmission and the sub radiator are connected to each other in the middle of the cooling forced circulation passage, and the transmission medium and the sub radiator are connected by the cooling medium flowing through the cooling forced circulation passage. Can be cooled.

In this way, the transmission medium and the sub radiator are cooled by the cooling medium flowing through the cooling forced circulation passage, so that the stored water is not wastefully discharged to the outside and the road surface and the like are not drained. It is possible to prevent the problem of freezing.

According to the second aspect of the present invention, a part of the forced circulation channel for cooling is arranged in the suction channel and / or the discharge channel of the water discharge pump.

In this way, the cooling medium flowing in the cooling forced circulation flow channel can be cooled in the suction flow channel and / or the discharge flow channel of the water discharge pump, so that the cooling medium can be smoothly and surely. By cooling, the transmission and the sub radiator can be cooled efficiently.

According to the third aspect of the present invention, the auxiliary cooler is provided in the return side flow path of the forced circulation circulation path for cooling.

In this way, the cooling medium flowing in the return side channel of the cooling forced circulation channel can be cooled by the auxiliary cooler, so that the cooling medium can be cooled smoothly and surely, and the transmission and sub transmission can be efficiently performed. The radiator can be cooled.

[Brief description of drawings]

FIG. 1 is an explanatory view of an engine cooling device for a fire engine according to the present invention (first embodiment).

FIG. 2 is an explanatory view of an engine cooling device of the fire engine (second embodiment).

FIG. 3 is an explanatory diagram of an engine cooling device of the fire engine (third embodiment).

FIG. 4 is a sectional side view of an auxiliary cooler.

5 is a cross-sectional view taken along the line I-I of FIG.

FIG. 6 is an explanatory view of a conventional engine cooling device for a fire engine.

[Explanation of symbols]

A engine cooling device 1 transmission 2 PTO axis 3 Water discharge pump 4 radiator 5 sub radiator 6 Cooling channel

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2E189 AA04 AD04 AE10                 3D038 AA10 AB04 AC23                 3D043 AA05 AB07 BC01 BC04 BF07                 3J063 AA03 AB01 AC03 AC14 BA15                       CA04 XH02 XH04 XH12 XH23                       XH32 XH42

Claims (3)

[Claims] 1. A transmission is interlocked with an engine, and a water discharge pump is interlocked with the transmission via a PTO shaft so that water can be discharged by the water discharge pump while a radiator is provided in front of the engine. In a fire engine in which a sub radiator is connected to the radiator and the engine can be cooled by both radiators, the transmission and the sub radiator are connected to the middle of the forced circulation flow path for cooling, and the same cooling is performed. An engine cooling device for a fire engine, characterized in that a transmission medium and a sub radiator can be cooled by a cooling medium flowing through a forced circulation passage for a vehicle. 2. The engine cooling device for a fire engine according to claim 1, wherein a part of the forced cooling circulation passage is arranged in the suction passage and / or the discharge passage of the water discharge pump. 3. The engine cooling device for a fire engine according to claim 1 or 2, wherein an auxiliary cooler is provided in the return-side passage of the forced circulation circulation passage for cooling.