JPH0316748Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for introducing pre-warmed atmospheric air, that is, warm air, into an engine mounted on a motor vehicle.

[Conventional technology and its problems]

Generally, engines installed in automobiles introduce pre-warmed atmospheric air, or warm air, for the purpose of increasing fuel atomization and improving combustibility when the atmospheric air temperature is low. Conventional warm air introduction devices, for example, as disclosed in Japanese Utility Model Publication No. 56-54379, are installed on the outside of the exhaust manifold of the engine or the exhaust system parts of the exhaust purification device, separated by an appropriate gap. A heat protector is provided to cover a part of the exhaust system components, and warm air warmed within the heat protector is guided to the air cleaner via a warm air introduction passage.

However, connecting the hot air introduction passage to the air cleaner to the heat protector that covers the outside of the exhaust system portion in this way causes the water and/or dust that has flowed into the heat protector to be sucked into the air cleaner as is. Not only was there a problem in that the filter element in the air cleaner was contaminated prematurely, but the air flow velocity within the heat protector was locally faster and slower, creating temperature spots, making the temperature of the warm air unstable.

The present invention solves the above-mentioned problem by obtaining warm air for the engine in a hollow side frame of an automobile by utilizing the heat of the cooling water flowing from the engine to the radiator.

[Means to solve the problem]

For this reason, the present invention provides an automobile engine mounted on a pair of left and right hollow side frames extending in the front-rear direction of the automobile, in which a hot air introduction passage connected to an air cleaner for the engine is installed in one hollow side frame of the two side frames. The exhaust pipe from the engine is connected to the side frame through or without a warm air jacket formed on the outer periphery of the exhaust pipe from the engine, and one of the side frames has a cooling water outlet pipe from the engine to the radiator inside. is inserted so as to extend in the longitudinal direction of the side frame, and an atmospheric air introduction hole is provided at a portion upstream of the cooling water outlet pipe.

[Functions and effects of the idea]

In this configuration, the atmospheric air flowing into the side frame from the atmospheric air introduction hole bored in the side frame extends into the side frame in the longitudinal direction while flowing inside the side frame in the longitudinal direction. The hot air is heated by the high-temperature cooling water in the cooling water outlet pipe installed in the cooling water outlet pipe, and is then taken into the engine via the air cleaner.

In this case, the atmospheric air used for heating flows through the side frame in its longitudinal direction and reaches the air cleaner, and as it flows through the side frame, water and/or dust are separated. Alternatively, the amount of dust can be reduced, while the atmospheric air used for heating comes into contact with the cooling water outlet pipe arranged in the longitudinal direction within the side frame over a long section, so no temperature spots are generated. However, the heat of the cooling water flowing from the engine to the radiator is taken away by the generation of warm air and its temperature is lowered, so the heat load on the radiator can be reduced accordingly.

Therefore, according to the present invention, it is possible to reduce the contamination of the filter element in the air cleaner due to warm air for the engine, and also to obtain warm air at a stable temperature.Moreover, it is possible to downsize the radiator by reducing the heat load on the radiator. It has the effect that can be achieved.

〔Example〕

Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. In the drawings, reference numeral 1 indicates a pair of left and right hollow side frames extending in the longitudinal direction of the automobile. Both side frames 1, 1 are both made of sheet metal, and there is a The front cross frame 2 and the rear cross frame 3 are integrally connected to each other, and a front bumper 4 is attached to the front ends of both side frames 1, 1.

On the front upper surface of both side frames 1, 1,
A floor panel 8 constituting the floor of the cabin 5 that surrounds the driver seat 6 and the passenger seat 7 is attached. A tunnel 9 is formed.

Reference numeral 10 in the figure indicates a water-cooled engine located at the rear of the floor panel 8, and the engine 1
0 has a transmission transmission transmission 11 attached to its rear surface, and a rear cross frame 3 that connects both side frames 1, 1, and an engine support frame 12 mounted between both side frames 1, 1. The cooling water outlet 13 of the engine 10 is located at the same height as the floor panel 8 or at a similar height to the rear surface of the engine 10. It is provided.

Reference numeral 14 in the figure indicates a radiator with a fan (not shown) located at the front lower part of the floor panel 8, and the upper tank 15 of the radiator 14 is located at a higher position than the cooling water outlet 13 of the engine 10. In addition, the lower tank 16 has an approach line 18 connecting the lower surface of the front bumper 4 and the outer peripheral surface of the front wheel 17.
It is installed at a height position that is located higher up,
The cooling air after passing through this radiator 14 is
It is designed to blow through rearward from the lower surface of the floor panel 8 and the inside of the floor tunnel 9.
Note that a filler neck (not shown) with a filler cap is provided on the upper surface of the upper tank 15.

A cooling water supply pipe 21 is provided on the lower surface side of the floor panel 8 between the lower tank 16 of the radiator 14 and the cooling water inlet 20 to the cooling water pump 19 attached to the front surface of the engine 10. On the other hand, the cooling water outlet pipe 22 connecting the upper tank 15 of the radiator 14 and the outlet 13 of the engine 10 is connected to two metal pipe parts 22a and 22b connected to each other by a rubber pipe 22c, and one metal It is composed of a rubber tube section 22d for connecting the tube section 22a to the cooling water outlet 13, and a rubber tube section 22e for connecting the other metal tube section 22b to the upper tank 15. 22a is disposed within the left side frame 1 so as to extend in the longitudinal direction of the side frame 1, while the other metal pipe portion 22b is disposed within the floor tunnel 9.

An intake manifold 23 is attached to one side of the engine 10, and an exhaust manifold 24 is attached to the other side.The intake manifold 23 has an air cleaner 26 connected to it via a carburetor 25, and the exhaust manifold 24 has warm air around its outer periphery. An exhaust pipe 28 with a closed jacket 27 is connected to each.

An atmospheric air introduction pipe 29 connected to the dust side chamber 26a of the air cleaner 26 is inserted into the right side frame 1 so as to extend rearward, and a hole is provided in the front bumper 4 at the front end of the right side frame 1. An atmospheric air introduction hole 30 is provided for introducing atmospheric air through the hole 4a.

The warm air introduction pipe 31 connected to the dust side chamber 26a of the air cleaner 26 is connected to the warm air jacket 27 on the outer periphery of the exhaust pipe 24, and the warm air introduction pipe 31 connected to the warm air jacket 27
2 is connected inside the left side frame 1 behind the cooling water outlet pipe 22, and the front end of the left side frame 1, that is, the part upstream of the cooling water outlet pipe 22, is connected to the warm air. Atmospheric air introduction holes 33 are bored for use.

Further, in the dust side chamber 26a of the air cleaner 26, a cooling/heating air switch is provided for appropriately switching between introducing the intake air to the engine 10 from the atmospheric air introduction pipe 29 and introducing it from the warm air introduction pipe 31. A valve 34 is provided.

Cooling/heating air switching valve 34 in this air cleaner 26
is operated to the position where the atmospheric air inlet pipe 29 is closed, the intake air to the engine 10 flows through the atmospheric air inlet hole 3 at the front end of the left side frame 1.
After flowing into the left side frame 1 from 3,
The warm air is introduced into the air cleaner 26 from the warm air introduction pipe 32 through the warm air jacket 27 and from the warm air introduction pipe 31, and when it flows inside the left side frame 1, it flows into the left side frame 1 in the midcarinal direction. The exhaust pipe 24 is heated by the high temperature cooling water in the cooling water outlet pipe 22 disposed so as to extend therethrough, and then further warmed by the exhaust gas in the warm air jacket 27 on the outer periphery of the exhaust pipe 24.

Note that if the intake air to the engine 10 can be sufficiently warmed only by the cooling water flowing out from the engine 10 to the radiator 14, the hot air introduction pipe 31 from the air cleaner 26 is connected to the warm air jacket 27. What is necessary is just to connect it directly to the left side frame 1 without going through it.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the automobile, Fig. 2 is a partially cutaway perspective view with the cabin removed, Fig. 3 is a side view with the cabin removed, and Fig. 4 is a side view of the automobile. The figure is a plan view of FIG. 3, and FIG. 5 is a partially cutaway enlarged plan view of FIG. 4. 1... Side frame, 2, 3... Cross frame, 4... Front bumper, 5... Cabin, 8... Floor panel, 9... Floor tunnel, 10... Engine, 13... Cooling water outlet, 14... ...Radiator, 15...Upper tank, 16...Lower tank, 19...Cooling water pump, 20...Cooling water inlet, 21...Cooling water supply piping, 22...Cooling water outlet piping, 23...
... Intake manifold, 24 ... Exhaust manifold, 26 ... Air cleaner, 27 ... Warming jacket, 28 ... Exhaust pipe, 29 ... Atmospheric air introduction pipe, 31 ... Warm air introduction pipe, 33 ... Atmospheric air introduction hole .

Claims (1)

[Scope of utility model registration request] In an automobile engine mounted on a pair of left and right hollow side frames extending in the longitudinal direction of an automobile, a hot air introduction passage connected to an air cleaner for the engine is provided in one of the hollow side frames of the two side frames. The exhaust pipe from the engine is connected with or without a warm air jacket formed on the outer periphery of the exhaust pipe, and one side frame has a cooling water outlet pipe from the engine to the radiator inside the side frame along the length of the side frame. 1. A warm air introduction device for an automobile engine, characterized in that the warm air introduction device is inserted so as to extend in the direction of the cooling water, and an atmospheric air introduction hole is provided at a portion upstream of the cooling water outlet pipe.