JPH0515539Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle cooling system, and more particularly to a vehicle cooling system that utilizes a turbocharger and an intercooler attached to an internal combustion engine.

[Conventional technology]

Generally, a heat pump type air-conditioning device is employed as a means for obtaining a low heat source to be supplied to an air conditioner for a vehicle (see specification of Japanese Utility Model Application No. 59-22001).

This heat pump type air conditioning system, for example,
As shown in the figure, a refrigeration cycle is employed, which includes a compressor 22 driven by an engine 21, an evaporator 23, a condenser 24, an expansion valve 25, and the like.

[Problem that the invention attempts to solve]

However, this heat pump air conditioning system
Since the refrigeration cycle is adopted, the compressor 22, evaporator 23, condenser 24,
Each component such as the expansion valve 25 is required, resulting in a large number of parts. Furthermore, since the compressor 22 needs to be driven by the engine 21, there are layout constraints.

On the other hand, there is an air supply control system for internal combustion engines (Japanese Patent Publication No. 39-30188) that uses a refrigeration cycle and does not require the engine to drive a compressor, etc., but it supplies a sufficient amount of air to the engine and the room. It was difficult to do so.

[Purpose of invention]

This invention was devised to solve the above problems, and its purpose is to supply a sufficient amount of air to the engine and the cabin, reduce the number of parts, and eliminate layout constraints for vehicle cooling. The purpose is to provide equipment.

[Means for solving problems]

To achieve the above object, the present invention provides an internal combustion engine in which a turbocharger is provided in the middle of the intake passage of the engine, and an intercooler is provided between the turbocharger and the intake manifold. An intake passage that connects to the intercooler via the compressor of the turbo charger, and a branch intake passage that connects the air cleaner to the intercooler via the compressor of the turbo cooler are provided, and the branch intake passage is connected to the turbine side of the turbo cooler on the downstream side of the intercooler. The present invention is characterized in that a branch pipe is provided, and the air supply path of the air conditioner is connected to the turbine side of the turbo cooler.

[Effect of invention]

Since intake air is supplied to the intercooler from both the turbocharger and turbo cooler, the amount of intake air increases. Therefore, sufficient air can be supplied to the engine and the room.

Furthermore, since the low-temperature air that has passed through the turbocharger and turbo cooler can be used in the air conditioner, there is no need for the engine to drive a compressor, etc., the number of parts is reduced, and there are no restrictions on the layout.

[Example of idea]

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

FIG. 1 shows a vehicle cooling system according to an embodiment of the present invention.

In the figure, 1 is a turbocharger attached to a diesel engine 2, and is provided in the middle of an intake passage 3. An air cleaner 4 is attached to one end of the intake passage 3, and an intercooler 5 is provided midway between the turbocharger 1 and the intake manifold 2A. A branch pipe 6 branches from a point downstream of the intercooler 5 in the intake passage 3, and a turbo cooler 7 and a regulating valve 8 are provided in the middle of the branch pipe 6. The turbo cooler 7 is composed of a turbine 7A and a compressor 7B, and a branch pipe 6 is connected to the turbine 7A. Reference numeral 10 denotes a branch intake passage that branches from the intake passage 3, and a compressor 7B of the turbo cooler 7 and a check valve 11 are provided in the middle of the branch intake passage, and they merge upstream of the intercooler 5 of the intake passage 3 to increase the intake air. There is. Further, a heat insulating material 6A is wrapped around the branch pipe 6 downstream of the turbo cooler 7, and an end 6B of the branch pipe 6 is connected to an air supply path 9A of the air conditioner 9. 13 is a switching valve that directs the cold air in the branch pipe 6 to the air supply path 9A.
supply and cut-off.

A lever 9B for adjusting the regulating valve 8 is attached to the air conditioner 9, and this lever 9B is connected to an air blowing motor 12 which is interlocked with the regulating valve 8.

Next, to explain the operation of this embodiment, air entering the air cleaner 4 is compressed by the turbocharger 1 and becomes high temperature and high pressure air supply. This high-temperature, high-pressure supply air is cooled by the intercooler 5, thereby increasing its density and becoming high-pressure and low-temperature (about 10° C. above the outside air temperature). When this high-pressure, low-temperature supply air passes through the turbo cooler 7, it is expanded by the turbine 7A and becomes cold air close to atmospheric pressure and below the outside temperature.

According to the above configuration, the high-pressure, low-temperature air after passing through the intercooler 5 becomes low-pressure, lower-temperature air after passing through the turbo cooler 7, and can be used as cold air for the air conditioner 9. In other words,
The turbo cooler 7 can be used as a device for generating a low temperature source. Therefore, the compressor 22, evaporator 23, condenser 24, expansion valve 25, etc. as in the conventional example are no longer necessary, the number of parts is greatly reduced, and a small space is required.

Furthermore, since intake air is supplied to the intercooler 5 from both the turbocharger 1 and the turbo cooler 7, the amount of intake air increases. Therefore, sufficient air can be supplied to the engine and the room.

And also, compressor 7B of turbo cooler 7
Since it is additionally used as a compressor for the intake air, the expansion energy held by the intake air can be sufficiently recovered.

Furthermore, the location where the turbo cooler 7 is installed is not restricted by the engine, unlike the conventional compressor 22, so the degree of freedom in layout is increased.

It is also possible to make the turbocharger 1 a variable nozzle type and control the variable nozzle so that the turbocharger rotation can be increased when the cooler is ON.

Further, in this embodiment, an example in which the present invention is applied to a diesel engine has been described, but the present invention can also be applied to a gasoline engine.

[Effect of idea]

As described above, according to the vehicle cooling device according to the present invention, sufficient air can be supplied to the engine and the interior of the room, and expansion energy can be sufficiently recovered. Therefore, air filling efficiency is improved and output is improved.

Moreover, the number of parts is reduced and the degree of freedom in layout is increased.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a vehicle cooling system according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional vehicle cooling system. 1...Turbo charger, 2...Diesel engine, 2A...Intake manifold, 3...
Intake passage, 4... Air cleaner, 5... Intercooler, 6... Branch pipe, 7... Turbo cooler, 7A
... Turbine, 7B... Compressor, 9... Air conditioner, 9A... Air supply path, 10... Branch intake passage.

Claims (1)

[Scope of utility model registration request] An internal combustion engine in which a turbocharger is provided in the middle of the intake passage of the engine, and an intercooler is provided between the turbocharger and the intake manifold, and the air cleaner is connected to the intercooler via the compressor of the turbocharger on the upstream side of the intercooler. An intake passage and a branch intake passage that connects the air cleaner to the intercooler via the compressor of the turbo cooler are provided, and a branch pipe that connects to the turbine side of the turbo cooler is provided on the downstream side of the intercooler. A vehicle cooling device characterized in that an air supply path of an air conditioner is connected to the side.