JPS6214344Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air supply/exhaust system for a V-row engine equipped with a supercharger and an air cooler in which a radiator drive device is directly installed near the front end of a cylinder block.

Conventionally, in V-row engines that have a turbocharger and air cooler, both the turbocharger and air cooler are gathered at the front or rear end of the engine, and the turbocharger is installed above the air cooler installation location. ing. In this arrangement, the supercharger and air cooler are located close to each other, which is rational in that the air transport route is shortened. However, since the supercharger and cooler are stacked on top of each other, the overall height of the engine tends to be high. Particularly in V-row engines where the radiator drive device is installed directly near the cylinder block, the air cooler must be placed above the radiator drive device because the radiator drive device occupies space near the end of the engine. Furthermore, if a supercharger is installed on top of the engine, the overall height of the engine becomes very high, which not only makes it bulky, but also makes it susceptible to vibrations, leading to resonance problems and poor durability. On the other hand, a configuration in which the supercharger and the air cooler are connected by a passage provided within the wall thickness of the cylinder block itself is already known, but in that case, the difference in temperature between when the engine is running and when the engine is stopped is Problems arise in that water droplets form in the passages and corrode the blocks.

In view of the above problems, the purpose of this invention is to not only reduce the overall height of the engine and make it more compact, reduce vibration and improve the durability of the engine, but also prevent corrosion of the block due to water droplets generated when the engine is stopped. The supercharger is placed on one of the upper front end and the upper rear end of the block, and the air cooler is placed on the other, and a separate cylinder block is used to connect the turbocharger and the air cooler. The air supply connecting pipe is placed in the space within the V-bank of the cylinder block, away from the cylinder block, and the exhaust manifold, which connects each cylinder to the supercharger, is placed above the air supply connecting pipe within the V-bank. It is characterized by

Next, the present invention will be explained based on the drawings. FIG. 1 is a side view of a V-row engine employing an air supply and exhaust system according to the present invention. A radiator 2 is arranged in front of the cylinder block 1, and a radiator drive device 3 is installed directly near the front end of the cylinder block 1. The pulley 6 of No. 3 is driven to rotate a radiator fan (not shown). A starter motor 6 is installed at the rear end of the cylinder block 1, and a generator 7 is arranged behind the starter motor 6. Further, an air cooler 8 is arranged at the upper part of the front end of the cylinder block 1, and a supercharger 9 is arranged at the upper part of the rear end.
is located. In front of the supercharger 9, an air intake filter 10 connected to the supercharger 9 is fixed to the upper end of the cylinder block 1.
0 has an intake port 10a at the top. As is clear from FIG. 2, the supercharger 9 has an exhaust pipe 11 in the center, and a pair of turbine housings 12 and compressor housings 13 on both sides. The compressor housing 13 includes a compressor wheel (both not shown) that rotates integrally with the turbine wheel. An inlet 12a of the turbine housing 12 is connected to each cylinder 15 via an exhaust manifold 14.
An outlet (not shown) is connected to an exhaust pipe 11. Also, the inlet 13 of the compressor housing 13
a is connected to the supply air filter 10 via a communication pipe 16, and the outlet 13b is connected to a communication pipe 17, as shown in FIG. As is clear from FIG. 3, the communication pipe 17 is disposed in a space within a V-bank 18 formed by the left and right cylinders 15, 15 inclined in a V-shape, and is connected to the cylinder wall 20 via a support member 19. It is fixedly supported by. V bank 1
A communication pipe 17 arranged in the space inside the cylinder block 1 extends almost horizontally from the rear end to the front end of the cylinder block 1 (Fig. 2), and its tip 17a connects the two air pipes arranged at the upper part of the front end of the cylinder block 1. It opens to the air inlet 8a of the cooler 8. The air coolers 8 arranged in parallel in the left and right horizontal directions are water-cooled and have a cooling water inlet 8b and a cooling water outlet 8c at the top, and the air outlet 8d is connected to each cylinder 1 through an air supply manifold 21.
It is connected to 5.

When the engine operates, pulley 4 and V-belt 5
The pulley 6 is driven via the fan to rotate the fan and operate the radiator 2. On the other hand, exhaust gas from each cylinder 15 passes through the exhaust manifold 14, inside each turbine housing 12, and is discharged from the exhaust pipe 11. The exhaust gas then rotates the turbine wheel. When the turbine wheel rotates, the compressor wheel is rotated at the same time, so that the air taken in from the air supply port 10a is pressurized within the compressor housing 13. The pressurized air passes through the connecting pipe 17, is cooled in the air cooler 8, and then passes through the air supply manifold 21.
is supplied to each cylinder via.

As explained above, according to the present invention, the supercharger 9 is disposed in either the front end upper part or the rear end upper part of the cylinder block 1, and the air cooler 8 is disposed in the other, so that the supercharger 9 and the air Since the communication pipe 17 that communicates with the cooler 8 is placed in the space within the V bank 18 of the cylinder block 1, even though it is a V-row engine with the radiator drive device 3 installed directly near the front end of the cylinder block 1. , the overall height of the engine can be kept low and has the advantage of being compact. Furthermore, it is less susceptible to vibrations, which improves durability. Also, since the supercharger 9 and the air cooler 8 are connected using the connecting pipe 17, they are less affected by engine temperature changes than when the thickness of the cylinder block 1 is used as a connecting passage. Corrosion caused by water droplets can be prevented as much as possible. Furthermore, since the material of the connecting pipe 17 can be freely selected, corrosion can be completely prevented if a non-corrosive metal is used. Of course, there is no need to worry about corrosion of the cylinder block. Especially in this invention, the supercharger 9
A supply air connecting pipe 17 (separate from the cylinder block) connecting the cylinder block 1 and the air cooler 8 is connected to the cylinder block 1.
The exhaust manifold 14, which connects each cylinder to the supercharger, is placed above the air supply connecting pipe 17 in the V bank, away from the cylinder block. The air supply connecting pipe 17 is thermally isolated from the cylinder block 1 by an air layer, and the air supply in the connecting pipe 17 is not heated by the heat of the cylinder block 1. Moreover, since the high-temperature exhaust manifold 14 is placed above and apart from the supply air connection pipe 17, the hot air around the exhaust manifold 14 does not reach the supply air connection pipe 17 (there is no heat effect due to convection), and the Therefore, the high temperature of the exhaust manifold 17 and the temperature rise due to heat radiation can be kept to a minimum. Therefore, the capacity of the air cooler 8 can be reduced,
From this aspect as well, the engine can be made more compact.

[Brief explanation of the drawing]

Figure 1 shows a V equipped with the air supply and exhaust system according to the present invention.
FIG. 2 is a side view of the train engine, FIG. 2 is a schematic plan view thereof, and FIG. 3 is a schematic cross-sectional view of FIG. 2. 1... Cylinder block, 3... Radiator drive device, 8... Air cooler, 9... Supercharger, 1
7...Connection pipe, 18...V bank.

Claims (1)

[Scope of utility model registration request] In a V-row engine with a supercharger and air cooler attached, in which the radiator drive device is installed directly near the front end of the cylinder block, the supercharger is placed on either the front or rear top of the cylinder block, and the supercharger is placed on the other. The air coolers are arranged respectively, and the air supply connecting pipes connecting the supercharger and air cooler are connected to the V of the cylinder block.
A V-row engine characterized in that the exhaust manifold connecting each cylinder and the supercharger is placed in a space within the bank away from the cylinder block, and is placed away above the air supply connecting pipe in the V-bank. Supply and exhaust equipment.