JPS627367B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for mounting a supercharger, that is, an exhaust turbo supercharger, driven by the exhaust gas of an engine.

Generally, the first problem when installing an exhaust turbo supercharger to an engine is how to guide the exhaust gas from the engine's exhaust port to the exhaust turbine of the turbo supercharger without lowering the temperature while it is still high. The second problem is how to guide the supercharged air from the blower compressor of the turbocharger to the intake port of the engine without pressure loss. Therefore, conventionally, as described in, for example, Japanese Patent No. 106391, an intake manifold and an exhaust manifold are joined to one of the longitudinal sides parallel to the crankshaft of the engine. By arranging an exhaust turbo supercharger on one longitudinal side with the axis of the exhaust turbo supercharger being vertical, the passage for supercharged air and the passage for exhaust gas are shortened. There is.

In order to reduce the protruding distance of the exhaust turbo supercharger from one longitudinal side of the engine, the intake manifold and exhaust manifold are divided into left and right halves, and the exhaust turbo supercharger is placed in between. Since the configuration has a feeder installed, the intake manifold and exhaust manifold must each be divided into two parts, and in addition, there are two connection ports each for the blower compressor and exhaust turbine in the exhaust turbo supercharger. The structure becomes extremely complicated, and in addition,
Making the axis of the exhaust turbo supercharger vertical, which is installed on one longitudinal side of the engine, means that in the exhaust turbo supercharger, lubricating oil for the shaft connecting the blower compressor and the exhaust turbine is However, since it is concentrated on the blower compressor or exhaust turbine side located below, oil leakage is likely to occur and not only does the consumption of lubricating oil increase, but also white smoke is generated due to the combustion of lubricating oil. Moreover, there are problems such as oil shortage occurring in the bearings of the extremely high-speed shafts.

The present invention aims to solve this problem and improve the cooling performance of the exhaust turbocharger.

For this reason, the present invention provides an automobile engine in which the engine is mounted horizontally in the engine room at the front of the automobile so that the crankshaft is substantially perpendicular to the traveling direction of the automobile. An intake manifold and an exhaust manifold are attached to the front longitudinal side surface facing the front side of the automobile among both longitudinal side surfaces parallel to the above, and a space formed at the bottom of the intake manifold and exhaust manifold is connected to the intake manifold. An exhaust turbo supercharger is configured in which a blower compressor and an exhaust turbine connected to an exhaust manifold are directly connected via a shaft, and the shaft of the exhaust turbo supercharger is arranged so as to be substantially horizontal. This is what I did.

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 indicates an engine compartment 4 formed at the front of the vehicle body by a front grill 2 and a bonnet 3 that can be opened and closed. The figure shows a multi-cylinder engine body arranged horizontally so as to be substantially perpendicular to the engine body 1, and the intake port 5 and exhaust port 6 of each cylinder of the engine body 1 are located on both left and right longitudinal sides of the engine body 1 parallel to the crankshaft. The front longitudinal side 7 is provided so as to be open to the front longitudinal side 7 facing the front side of the automobile, and the intake and exhaust ports 5 and 6 of the engine body 1 are opened to each intake port 5. Attaching an intake manifold 8 for distributing to the exhaust gas and an exhaust manifold 9 for merging the exhaust gas from each exhaust port 6,
A space 10 is located below both manifolds 8 and 9.
is formed, and an exhaust turbine 12 is installed in this space 10.
and a blower compressor 13 are directly connected by a shaft 14, and the exhaust turbo supercharger 11 is arranged so that the shaft 14 is substantially parallel to and substantially horizontal with the crankshaft (not shown) of the engine body 1. and the turbo supercharger 1
The outlet side of the blower compressor 13 of No. 1 is flange-connected to the gathering part of the intake manifold 8 through or without the supercharging passage 15, and an upwardly bent suction pipe 16 is connected to the suction side of the blower compressor 13. The carburetor 17 and the air cleaner 18 are connected to the upper end of the suction pipe 16, while the turbo supercharger 1
The inlet side of one exhaust turbine 12 is connected by a flange to the confluence part of the exhaust manifold 9, and the outlet side of the exhaust turbine 12 is connected to an exhaust pipe 19 extending toward the rear of the vehicle body. In addition, the reference numeral 20 in the figure is an intake detour pipe that connects the supercharging pipe 15 and the suction pipe 16 bypassing the blower compressor 13. A blow-off valve 21 that opens when the engine decelerates is provided, and reference numeral 22 is an exhaust bypass pipe that connects the exhaust manifold 9 and the exhaust pipe 19 bypassing the exhaust turbine 12. A waste gate valve 23 is provided which opens when supercharging exceeds 2.
4 is a heat shield plate provided substantially horizontally on the lower surface of the vaporizer 17.

In this way, the intake manifold 8 and the exhaust manifold 9 are attached to the front longitudinal side surface 7 of the engine body 1 installed horizontally in the engine room 4, and the turbocharger is installed in the space 10 formed at the lower part of these manifolds 8, 9. A feeder 11 is provided, a blower compressor 13 of the turbocharger is connected to an intake manifold 8, and an exhaust turbine 12 is connected to an exhaust manifold 9. Since both the exhaust passage leading to the exhaust passage and the intake passage from the blower compressor 13 to the intake port 5 of the engine body 1 are shortened, the exhaust gas from the exhaust port 6 passes through the short exhaust passage and reaches a high temperature with almost no heat dissipated. The supercharged air from the blower compressor 13 can be introduced into the exhaust turbine 12 as it is, and after driving the exhaust turbine 12 at a high temperature, is discharged to the outside from the exhaust pipe 9. On the other hand, the supercharged air from the blower compressor 13 passes through a short intake passage and has no flow resistance. Therefore, the air is guided from the intake port 5 to the combustion chamber of the engine with almost no pressure loss.

Furthermore, by disposing the exhaust turbo supercharger 11 in the space 10 formed at the bottom of the intake manifold 8 and the exhaust manifold 9 attached to the front longitudinal side surface 7 of the engine body 1, the intake manifold 8 and the exhaust manifold The space 10, which is conventionally a dead space, formed at the lower part of the exhaust manifold 9 can be effectively used for arranging the exhaust turbo supercharger 11, and the intake manifold 8 and the exhaust manifold 9 can be moved from side to side as in the conventional example. without dividing into two,
This allows the exhaust turbo supercharger 11 to be brought closer to the engine body 1, and in addition, the exhaust turbo supercharger 11 is directly blown by the wind generated by the running of the vehicle. , the cooling performance of the exhaust turbo supercharger 11 can be improved.

Note that the carburetor 1 is located above the exhaust turbo supercharger 11.
7 and also provide a heat shield plate 24 on the lower surface of the carburetor 17, it is possible to reliably prevent heat damage from the exhaust turbo supercharger 11 from affecting the carburetor 17.

As described above, according to the present invention, an intake manifold and an exhaust manifold are attached to the front longitudinal side of an engine mounted horizontally in an engine room at the front of an automobile, and an exhaust turbo supercharging By installing the machine,
The exhaust turbo supercharger can be brought closer to the engine without dividing the intake manifold and exhaust manifold into left and right halves. This makes it possible to avoid complicating the structure due to division into two parts, and improve the cooling performance of the exhaust turbo supercharger.Moreover, the exhaust turbo supercharger is arranged so that its axis is substantially horizontal. As a result, the lubricating oil for the bearings in the exhaust turbocharger is not biased to one side, so there is no oil shortage in the bearings, there is less oil leakage, and lubricating oil consumption and white smoke can be reduced. have an effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view, and FIG. 2 is a left side view of FIG. 1. 1...Engine body, 5...Intake port, 6...
...Exhaust port, 7...One side, 8...Intake manifold, 9...Exhaust manifold, 10...Space, 11...Exhaust turbo supercharger, 13...Blower compressor, 12...Exhaust turbine.

Claims (1)

[Claims] 1. In an automobile engine in which the engine is mounted horizontally in the engine room at the front of the automobile so that its crankshaft is approximately perpendicular to the direction of travel of the automobile, both longitudinal sides parallel to the crankshaft of the engine An intake manifold and an exhaust manifold are attached to the front longitudinal side facing the front side of the vehicle, and a blower compressor connected to the intake manifold and an exhaust manifold are installed in the space formed at the bottom of the intake manifold and exhaust manifold. An exhaust turbo, comprising: an exhaust turbo supercharger directly connected to an exhaust turbine connected to a manifold via a shaft; the exhaust turbo supercharger is arranged such that the shaft of the exhaust turbo supercharger is substantially horizontal. Supercharged automotive engine.