JPH0128278Y2 - - Google Patents

Description

[Detailed description of the invention] Due to the structure of the engine, the intake pipe of an automobile engine is often curved significantly at the part where it connects to the intake manifold. As a means for correcting this, vanes are provided that are appropriately curved to perform a rectifying action, or a bulge that returns intake air that has flowed along the outside toward the center. On the other hand, the intake pipe is provided with a valve device that brings it into a nearly fully closed state or a fully closed state in connection with installing an exhaust brake or stopping the engine.
A noise suppressor is installed in conjunction with the installation of an exhaust brake, and this suppressor prevents unpleasant intake noise from occurring on the intake pipe side when the exhaust brake is applied, and also prevents the engine from generating unpleasant intake noise. A device provided in connection with stopping the engine is called an intake shutter, which cuts fuel and closes the intake pipe so that the engine can be stopped quickly.

This proposal considers the above-mentioned vane plate and the above-mentioned valve device in relation to each other, which have no relation in conventional ones, and
This allows the valve to also function as a vane.
The present invention can be explained as follows with reference to figures.

In FIG. 1, 1 is an intake pipe, 2 is a curved portion thereof, and 3 is an intake manifold. A valve device 4 for changing the state of the intake pipe 1 in connection with the exhaust brake or stopping of the engine is provided in the curved part 2 of the intake pipe 1.
Reference numeral 5 designates an actuator for this valve device 4, and in the case shown, this actuator 5 is of a fluid-operated type in which compressed air is introduced from an inlet 6 to rotate a plate-shaped valve body 7. The plate-shaped valve body 7 is given a curved shape that guides the flow of intake air while corresponding to the curvature of the intake pipe 1. The number of valve bodies 7 is one or more. In the illustrated case, the number of valve bodies 7 is three, and the symbols 7a, 7b,
7c is attached, and these valve bodies are connected to link 8.
a, 8b, 8c and link 9.

When the actuator 5 is not activated, the valve body 7 of the valve device 4 assumes the posture shown in FIG. 2 and acts as a rectifier vane to prevent intake air from flowing unevenly, but when the actuator 5 is activated, it rotates as shown in FIG. 3. This acts to reduce the area of the intake flow path in a desired manner.

The intake pipe according to the present invention described above uses a noise suppressor or an intake shutter to perform the function that was performed by the intake guide blades provided in the curved portion as a fixed part in conventional pipes. . The valve device 4 may be provided with two actuators, one for the noise suppressor and the other for the intake shutter, or the actuator may be provided with stroke selection means to select a stroke that acts as a noise suppressor. It is also possible to select the stroke that acts as the intake shutter as appropriate.

[Brief explanation of drawings]

FIG. 1 is a front view showing the essential parts of the intake pipe according to the present invention, and FIGS. 2 and 3 are sectional views showing the valve device shown in FIG. 1 in different states. DESCRIPTION OF SYMBOLS 1... Intake pipe, 2... Curved part, 3... Intake manifold, 4... Valve device, 5... Actuator, 6
...Compressed air inlet, 7, 7a, 7b, 7c...
...Valve body, 8a, 8b, 8c, 9...link.

Claims (1)

[Scope of utility model registration request] A valve device 4 that acts as a noise suppressor or an intake shutter is provided in the curved portion 2, and the valve body 7 of the valve device 4 is given a curved shape that guides the flow of intake air according to the shape of the curved portion 2. Intake pipe of automobile engine.