JPS6090923A - Cooling apparatus for engine with exhaust turbocharger - Google Patents

Abstract

PURPOSE:To cool a supercharger effectively, by passing a part of cooling water to a cooling-water passage in the supercharger when the temperature of cooling water is high, vaporizing cooling water by use of remaining heat of the supercharger, and carrying the vapor to a radiator under pressure. CONSTITUTION:In operation of an engine, cooling water circulated by a water pump 2 is heated in a water jacket 3 and then carried to a radiator 7 via a thermostat 4 opened by high-temperature cooling water and an upper hose 6. At the same time, a part of cooling water is carried from an output chamber 5b of a fitting 5 to a cooling-water passage 14 in a supercharger 13 via a pipe 12 for cooling the supercharger 13 and then it is recovered by the pump 2. When the engine is stopped, cooling water in the cooling-water passage 14 is boiled by the remaining heat and the vapor is carried to the radiator 7 via the pipe 12, etc. The vapor is condensed in the radiator 7 and cooling water is supplied to the passage 14 via a pipe 15 at the rate corresponding to the amount of vaporized cooling water.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for a 1'I-air turbocharger (=J enodine).

The exhaust turbocharger has an output of 1'V to apply pressure to high-grade air and forcibly feed it into the edge 7 cylinder/da.
At Kasou Tachibana, there is a confrenosato for pumping the air, and the method to drive this confrenosa is 0) L-Bino or 4 on the same axis.
: 41 < 14, and the turbine is driven by the exhaust gas of the engine/generator.

The center of the turbocharger (81) is a cenotano un/g that constitutes a terpino 1liil receiving part, and there is a cenotano un/'! The oil passage for lubricating the IIIa glj is shaped 1υS. The oil sent to this mail path uses Etsujitsu Mail Circulation 1J, 7 series oil, and when Ko/Jino stops, it becomes wet. The supply of oil should also be stopped. Then, a few minutes after the engine stops (J, turbocharger θ), the warm area of the center housing becomes extremely bacterium due to the residual heat effect, a so-called heat-on phenomenon. ,
This high temperature makes it easier for residual oil in the turbocharger to carbonize. If such a phenomenon is repeated, sludge will accumulate in the oil fl path of the housing Pi, the bearing diameter, the oil supply pipe, and the tray/vibrator 1 ivy, and you will think that there is only oil υi, and eventually This may cause problems such as burning of the bearing surface.

Therefore, in the past, an asbestos/doinoch type heat shield plate was installed on the upper part of the center housing, and a cooling water connection was installed near the turbine bearing to circulate the edge/cooling water -N, H(. Efforts have been made to reduce the heat-tonk width by 1 degree by providing a road.However, these conventional methods are not sufficient to reduce the temperature by 1lIiI8 degrees after high-speed running. In order to prevent burn-out of the turbine shaft, it was necessary to idle the engine for 1 to 2 minutes at VC before starting/stopping.

Therefore, an object of the present invention is to provide a cooling device for an engine including an exhaust turbocharger, which is effective in reducing the temperature of the turbocharger.

The above-mentioned purpose of this round ψJ is to leak a part of the hot cooling water into the cooling water path of the turbocharger Javi J, and when the engine is stopped, either the cooling water in this cooling water path or the turbocharger The heat causes steam to flow, and the generated steam is pumped to the radiator, while new cooling water is supplied to this cooling water passage. 1) The turbocharger is now effectively cooled.

Below, read example 1 of this redundancy with reference to figure 1.
Zuru. The walk pump 2 driven by the construction/schiff 1 is placed on the 1st figure and discharges: 2af soil, the edge/1
131 above the radiator 7 through the walk-out outlet inch/g 5 and the anono-hose 6 with the thermos cover 6, thermos cover 1 and 4 inside the main body.
It is connected to 1 tack 7d. On the other hand, walkpo/)
The intake port 21) follows the mouth air hose 8 and communicates with the lower part 71 of the radiator 7. The input room 5a of the walk-out renotification 5 leading to the Umekujiyake Nodo O is 10 heat inputs 1υa, 101. through the car heater y. The IC communicates with the meter tahononori 1 suction end 2D, and the nokui bus 11
Also. This suction passage is connected to the IIC).

Radiator 7'-1X1. The output 3λ5b of the meter outlet leading to the tack 7a/g 5 is Kuho? '1i no, 1 fuka, 1 no U no j! ,,The outlet passage 14b is connected to the 314 population section 14a through the viscous coupon 16 through The suction end 2b of the water pot 2 is connected to the VC by following the outlet pipe 15, which is the path of the cooler 2.The position of the inlet pipe 12 is 1i&'!, and it is placed lower than the height of the outlet pipe 15. In addition, the position of the cooling water path 14 in the turbocharger 13 is such that the cooling water liquid in the stiff turbo cooling system when the engine is stopped is located within this cooling water path 14 or the upper VC position. , is lower than the input i5a of the outlet pipe 5 and the input i5a of the radiator 7.The inlet pipe 12 has a gentle upward slope, or has no longitudinal irregularities. There may be.

For θ, we have 1 power for this load-0 effect. ! l:
When the edge/cooling water is cold, the water temperature is low, so the thermostat 4 is in a bad condition, and the cooling water from the Umekuhonopu 2 passes through the Umekujiake no. 6.
Water output 50 manpower 5d
Follow Bypass 11 from Walkho/Hunvc Shiru,
Therefore, the cooling water does not pass through to the Walk Jacket 3V4.
The sieve fan is heated by
Go to Gashini 1, proceed with Anova hose 6, and move to radiator 7.
A portion of the cooling water 1. The cooling water flows through the cooling water passage 14Vc in the turbocharger 15 through the air vibrator 12, cools the turbocharger 16, and is then collected in the water hop 2. Since the car heater 9 communicates with the input chamber ba side of the water outlet 50, the cooling water heated in the water jacket 6 flows through the car heater 9 in both cold and wet conditions. It looks like this.

6! When the water hop 2 is stopped from the crystallization state, the discharge of cooling water from the water hop 2 is also stopped. At this time, as shown in Figure 2, the cooling water accumulated in the (', The heat of vaporization is sent under pressure along with the koto 5 along with the inlet pipe 12 above which the steam is evaporated.This steam α)
Some of it condenses in the inlet pipe 12 and water outlet pipe 5, and the turbocharger 16
Most of the inner KIN is the upper Bi of radiator 7,
Enter tuck 7a and condense. As a result, the liquid level of the cooling water in the cooling system of the turbocharger 160) is lowered, so that the liquid level of the cooling water in the cooling system of the turbocharger 160) is lowered.
A portion of the cooling water advances through the outlet pipe 15 from the suction side of the water hop 2 and flows back into the turbocharger 16 in an attempt to reach the same water head level as the cooling water remaining in the 0-manpower V5a. As a result, the VC in the turbocharger 13 is filled with relatively cold cooling water, and the turbocharger 16 is effectively cooled. If the temperature of the turbocharger 16 is still sufficient to boil or evaporate the cooling water of this system, the steam produced will flow through the above-mentioned path to facilitate cooling of the turbocharger 13. , In this case, when one end of the inlet pipe 12 of the turbocharger 16 is connected to the water outlet 50 manpower chamber 5a 1lIll, a problem occurs inside the turbocharger 15 at the time of work/j/stop. The steam from the crystallized mud enters the rC inside the water jacket 6 and enters the engine 1.
There is a risk of heating the main body and widening the radiator 1, so the heat pipe 12 should be connected to the discharge side 1 path between the thermostat 4 and the radiator upper tank 70. That's preferable.

Of course, in this case, a pulp to prevent the reverse crushing is provided at the outlet of the water tank 7, and one end of the inlet pipe 12 is passed through the heater pipe ILlaK7 to provide a high-width steam. may be sent to the car heater 9.

Also, turbocharcito 13 outreno de paino 15
One end of the water hop 2 is connected to the suction end 2+) of the water hop 2, and if you run the VC at the end, you can trace the bypass 11 at the inner end of the water hop 2. This is not surprising since the cooling water that has flowed through the outlet pipe 15 may flow back into the radiator 7 through the turbocharger 16 and inlet pipe 12. , □ is,
It is preferable to connect e and large end oVcj□ of water hop 2 for communication.

In Figure 6, the cooling effect of the turbocharger due to the cooling 11 of the present invention is 7'' (compared to the conventional example).

This is the heat nok pack time of the turbocharger when the machine is operated at ILl [J K, m/h and then stopped on the actual machine. °, the match is curve 1
6, the conventional turbocharger (stand or turn, gland 17
The case of a conventional water-cooled turbocharger is shown by a curve 18.

As described above, 1] [Ki Turbo 5-+--7 of this invention]
Damage to the cooling cylinder of an engine with
''When the water is wet, some of it flows into the cooling water path in the turbocharger, and if the engine is stopped, )V( is generated by evaporation due to the cooling water on the rough road or the heat of the turbocharger). The structure is such that while the steam is sent under pressure to the radiator R, new cooling water is connected to this cooling water passage, which effectively cools the turbocharger and prevents lubrication due to the overheating of the turbocharger. It is possible to prevent the mail from turning into sludge and the turbine shaft to seize and cause noise.

[Brief explanation of drawings]

Figure 1 does not show an example of the actual implementation of this invention, but is a schematic diagram of the arrangement.
Figure 2 is an explanatory diagram of the effect when one nozzle is stopped in Example I of this research, and Figure 3 is a graph showing the effects of this invention in comparison with the conventional example. 1...Eng/J/, 2...Water Bonog, 3...-Quarter Jacket, 4...Thermosknoto, 5...
Walkout Renotofisochi/g, 6...Upper hose, 7...Radiator, 8...Lower hose, 9
... Car heater, 10a, 1 (Jo... Heater pipe, 11... Bypass, 12... Illuminator pipe, 1
6...Exhaust turbocharger, 14...Cooling water passage, 15...Outrenotopaigue agent, Kabayama Sho

Claims (1)

[Scope of Claims] tZ, 7.1 connected to the water pump outlet 11 driven by 1/2/, and others! 1^1 is the top of the radiator through the walk jacket of the engineering/di/body BiJ
311 circuits on the discharge side communicated with each other by 1° and −ψ;1
．． is connected to the lower tank of the radiator, and the other end is connected to the suction side of the radiator. and -ψ111; is 1j on Be:X
15 tank or the above 81 R/R 1 lfl water jacket Ib, l O: J me. The other end of the cooling water path in the turbocharger is connected to the suction side of the In preparation, when the engine is stopped, set the VC to 19 so that the cooling water level in the TJIJ gG turbo cooling system is 11 in the cooling water passage in the preliminary turbocharger or its upper VC. 4) F-air turbocharger attachment/Jino's cooling system. 2 One end of the turbo cooling 11 passage, or the Mi+ discharge 0Ij 1 passage between the walk jacket and the radiator's second part passage. 3. The cooling device for an IV1 turbocharger according to claim 1, which is connected to the discharge passage on the downstream side of the thermostat installed in the IV1 turbocharger.3. One end of the ml am turbo cooling spear 2 passage is l?14
8 [; A cooling device for an exhaust turbocharger angle engine according to item 1, which is communicated close to the suction side of the water bong.