JPH0326259Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides an internal combustion engine equipped with a supercharger such as an exhaust turbo supercharger, in which an intercooler for cooling supercharged air from the supercharger is used. The present invention relates to a mounting device for mounting on an internal combustion engine.

[Conventional technology]

Utility Model Application Publication No. 59-86314 as a prior art,
In the supercharging passage from the supercharger to the intake manifold,
In a supercharged internal combustion engine comprising an intercooler for cooling supercharged air and a surge tank for eliminating pulsation, the intercooler being disposed above a cylinder head cover, one end of the intercooler It is proposed that both the first end and the other end be removably bolted to a cylinder head cover in an internal combustion engine.

[Problem that the invention attempts to solve]

If both one end and the other end of the intercooler are bolted to the cylinder head cover of an internal combustion engine in this way, the vibration at both ends of the intercooler will be approximately the same as the vibration of the cylinder head cover. , it has the advantage of reducing adverse effects such as deformation on the intercooler due to the difference in vibration between the mounting portions at both ends.

However, there is a certain limit to the miniaturization of the intercooler in response to the miniaturization of the internal combustion engine, and the other end of the intercooler may protrude laterally from the cylinder head cover of the internal combustion engine when viewed from above. Even in such a case, attaching both ends of the intercooler to the cylinder head cover means that the bracket supporting the other end protruding sideways from the cylinder head cover has a cantilever support structure. As the length becomes longer, the difference in vibration between both ends of the intercooler becomes larger, so the difference in vibration between both ends has an adverse effect on the intercooler, such as deformation of the intercooler, separation of welds, and a decrease in sealing performance. It increases.

In addition, when the other end of the intercooler protrudes laterally from the cylinder head cover in plan view, one end of the intercooler can be attached to the cylinder head cover while the other end protrudes laterally from the cylinder head cover. Attaching the other end to other parts such as the intake manifold or surge tank attached to the internal combustion engine is
Since there is a considerable vibration difference between the cylinder head cover to which one end of the intercooler is attached and other parts such as the surge tank, the same problem as described above occurs.

The present invention provides the following advantages even when the other end of the intercooler disposed above the cylinder head cover of an internal combustion engine protrudes laterally from the cylinder head cover in plan view.
An object of the present invention is to provide a device that allows an intercooler to be reliably attached to an internal combustion engine with less adverse effects of vibration.

[Means for solving problems]

Therefore, in the present invention, one end of the intercooler disposed on the upper part of the cylinder head cover is attached to the cylinder head cover, while the other end of the intercooler is attached to the surge tank, which is attached to the cylinder head cover and the internal combustion engine. The structure is such that it is fixed to a support bracket installed between other parts such as.

[Functions and effects of the idea]

In this way, by installing the support bracket between the cylinder head cover and other parts attached to the internal combustion engine, such as the surge tank, the support bracket has a structure in which it is supported at both ends, improving its rigidity. At the same time, the vibration system is almost the same as that of the cylinder head cover, so by fixing the other end of the intercooler, one end of which is bolted to the cylinder head cover, to this support bracket,
This reduces the vibration difference between one end and the other end of the intercooler.

Therefore, according to the present invention, the intercooler can be installed in an internal combustion engine with a small difference in vibration between both ends of the intercooler. Even if it protrudes to the side, it is possible to reliably reduce the negative effects that the vibrations of the internal combustion engine have on the intercooler attached to the internal combustion engine, such as deformation of the intercooler, unweldedness, and deterioration of sealing performance. Moreover, other parts such as a surge tank attached to the internal combustion engine are connected to the cylinder head cover by a support bracket installed between the other parts such as the surge tank and the cylinder head cover. This has the effect of reinforcing the attachment of other parts such as the surge tank to the internal combustion engine.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In the drawing, reference numeral 1 indicates an internal combustion engine comprising a cylinder head 3 fastened to the top surface of a cylinder block 2, and a cylinder head cover 4 fastened to the top surface of the cylinder head 3. A carburetor 6 is attached to an intake manifold 5 attached to one side of the cylinder head 3, and a surge tank 7 for eliminating pulsation is connected to the upper surface of the carburetor 6. Exhaust manifold 8 attached to the other side
An exhaust turbo supercharger 9 is installed in which an exhaust turbine 9a and a blower compressor 9b are directly connected.

In this case, although the internal combustion engine 1 is not shown, the exhaust turbo supercharger 9 is located at the front and the carburetor 6 is located at the rear in the front engine room of the vehicle, with respect to the forward direction of the vehicle. It is installed horizontally so that

The upper part of the cylinder head cover 4 has an inlet header 10a at one end and an outlet header 10 at the other end.
An air-cooled intercooler 10 equipped with an air-cooled intercooler 10 is disposed such that its outlet header 10b protrudes laterally from the cylinder head cover 4 in plan view, and the inlet header 10a of the intercooler 10
is provided with an inlet pipe 11 for supercharged air and a bypass outlet pipe 12, and the blower compressor 9 in the exhaust turbo supercharger 9 is connected to the supercharged air inlet pipe 11.
b, and the bypass outlet pipe 12 is connected to the surge tank 7 via the bypass pipe 14, while the supercharging air outlet pipe 15 in the outlet header 10b is connected to the supercharging pipe 16. It is connected to the surge tank 7 via.

In addition, in the inlet header 10a of the intercooler 10, the supercharged air flowing in from the inlet pipe 11 passes through the intercooler 10 and flows to the outlet header 10b, and the supercharged air flowing in from the inlet pipe 11 is injected into the inlet header 10a. A supercharging switching valve 17 is provided for selectively switching between cases in which the air is guided to the bypass outlet pipe 12 without passing through the cooler 10.

This supercharging switching valve 17 is operated by a diaphragm type pressure operating mechanism 18, and this pressure operating mechanism 18 biases the supercharging switching valve 17 in the direction in which the bypass outlet pipe opens. spring 19
and the pressure chamber 20 is connected to the vaporizer 6.
By connecting the port 22 provided on the downstream side of the throttle valve 21 via the pressure transmission passage 23, when the intake pressure downstream of the throttle valve 21 is lower than a certain value close to atmospheric pressure, supercharging is switched. The valve 17 is actuated by its spring 19 to open the bypass outlet pipe 12 as shown by the solid line in FIG. The bypass outlet pipe 12 is led to the surge tank 7, but when the intake pressure on the downstream side of the throttle valve 21 becomes higher than the certain value, the supercharging switching valve 17 resists the spring 19 due to the pressure and switches to the third surge tank 7. As shown by the two-dot chain line in the figure, it operates to close the bypass outlet pipe 12 and allows the supercharged air flowing in from the supercharged air inlet pipe 11 to pass through the intercooler 10. In addition,
The pressure transmission passage 23 is connected to the temperature of the engine, the temperature inside the engine room, or the temperature of atmospheric air when these temperatures are high, but when these temperatures are low, the pressure transmission passage 23 is in communication. A temperature switching valve 24 is provided to cut off communication of the pressure transmission passage 23 when the pressure transmission passage 23 is turned off.

When the intercooler 10 disposed on the upper part of the cylinder head cover 4 is attached to the cylinder head cover 4, the inlet header 10 at one end of the intercooler 10 is attached to the cylinder head cover 4.
An ear piece 26 that integrally projects sideways from a is fastened to a mounting piece 27 fixed to the cylinder head cover 4 with a bolt 29 with a rubber grommet 28 in between. , a support bracket 30 is arranged so as to straddle between the cylinder head cover 4 and the surge tank 7,
One end 30a of the support bracket 30 is fastened to a mounting piece 31 fixed to the cylinder head cover 4 with a bolt 33 with a rubber grommet 32 in between, and the other end 30b of the support bracket 30 is integrally attached to the surge tank 7. A rubber grommet 35 is sandwiched between the mounting seat 34, which is shaped as shown in FIG. They are fixed in place by appropriate means such as welding, brazing, or screwing.

The support bracket 30 fixed to the other end of the intercooler 10 in this way is arranged so as to straddle between the cylinder head cover 4 and the surge tank 7, and one end 30a of the support bracket 30 is attached to the cylinder head cover 4. Tighten the bolt 33 and the other end 30
By fastening the bolt 36 to the surge tank 7, the surge tank 7 is attached to the cylinder head cover 4.
The support bracket 30 has a structure in which both ends are supported, thereby improving its rigidity.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of an internal combustion engine with a supercharger, and FIG.
Fig. 3 is a partially cutaway plan view of the intercooler and surge tank, and Fig. 4 is a side view of Fig. 1.
5 is an enlarged cross-sectional view of FIG. 1, FIG. 6 is an enlarged cross-sectional view of FIG. 4, and FIG. 7 is an enlarged cross-sectional view of FIG. 4. 1...Internal combustion engine, 2...Cylinder block, 3
... Cylinder head, 4 ... Cylinder head cover, 5 ... Intake manifold, 6 ... Carburetor, 7
...Surge tank, 8...Exhaust manifold, 9
...Exhaust turbo supercharger, 10...Intercooler, 10a...Inlet header, 10b...Outlet header, 26...Ear piece, 27...Mounting piece, 29
...Bolt, 30...Support bracket, 33,3
6...Bolt.

Claims (1)

[Scope of utility model registration request] An intercooler for cooling the supercharged air and a surge tank for eliminating pulsation are provided in the supercharging passage from the supercharger to the intake manifold, and the intercooler is disposed above the cylinder head cover. In an internal combustion engine with a supercharger, one end of the intercooler is attached to a cylinder head cover of the internal combustion engine, while the other end of the intercooler is attached to the cylinder head cover and another such as the surge tank attached to the internal combustion engine. A mounting device for an intercooler in an internal combustion engine with a supercharger, characterized in that the intercooler is fixed to a support bracket installed between the intercooler and the parts.