JPH0639070Y2 - Noise suppressor valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a noise suppressor valve attached to an intake system of an engine, and more particularly to a noise suppressor valve that closes an intake pipe when an exhaust brake is operated.

[Outline of device]

A noise suppressor valve is configured adjacent to a partition wall provided in the intake pipe to supply intake air separately to the left and right bank cylinder groups, and a curved butterfly valve is attached, and this butterfly valve is attached to a small angle. By rotating, the intake air distribution ratio to the left and right banks is controlled, and the intake air distribution ratio is controlled by effectively utilizing the noise suppressor valve.

[Conventional technology]

Exhaust brakes are attached to the exhaust system in order to enhance the braking performance of the engine brakes of automobiles. The exhaust brake is composed of, for example, a butterfly valve, and the butterfly valve is rotated to close the exhaust pipe. When the fuel supply to the engine is stopped and the exhaust brake is activated, the engine becomes a closed air pump and the inertial force of the vehicle must drive the air pump, which results in a large braking force. Occur. When such an exhaust brake is actuated, the flow of intake air flows backward, and the intake air flows through the intake pipe toward the air cleaner side. At this time, the intake pipe produces lumpy and unpleasant noise. Therefore, in order to prevent such noise, a noise suppressor valve is attached to the intake pipe side.

[Problems to be solved by the invention]

Such a conventional noise suppressor valve has been used only for its original purpose, and can be switched between two states of a fully open state and a fully closed state. On the other hand, in a V-type engine having left and right banks, it is necessary to supply intake air separately to the left and right banks.
However, in the conventional engine, the distribution ratio of the intake air supplied to each of the left and right banks cannot be controlled. The use of the above noise suppressor valve is also considered, but the conventional noise suppressor valve cannot be mounted at an appropriate position where pulsation can be used because of its straight shape, and the noise suppressor valve cannot control the intake distribution ratio. It was impossible.

The present invention has been made in view of such problems, and an object thereof is to provide a noise suppressor valve capable of controlling the distribution ratio of intake air to a plurality of cylinder groups.

[Means for solving problems]

The present invention relates to a noise suppressor valve that closes an intake pipe when an exhaust brake is actuated, wherein the noise suppressor valve is composed of a butterfly valve and is adjacent to a partition means for supplying intake air to a plurality of cylinder groups. And provided the butterfly valve,
Moreover, the butterfly valve is curved so as to be continuous with the partition means, and the distribution ratio of intake air to the plurality of cylinder groups is controlled by rotating the butterfly valve.

[Action]

Therefore, it becomes possible to mount the noise suppressor valve at an appropriate position where pulsation can be utilized, and by rotating the butterfly valve that constitutes this noise suppressor valve and is curved by a minute angle, the intake air supplied separately by the partitioning means It becomes possible to control the distribution ratio.

〔Example〕

FIG. 3 shows a V-type 8-cylinder engine having a noise suppressor valve according to an embodiment of the present invention. The engine is provided with left and right banks 11 and 12, and these banks 11 and 12 are provided in the banks 11 and 12. Four cylinders are formed in each. The intake manifolds 13 and 14 are connected to the left sides of the left and right banks 11 and 12, respectively.
Exhaust manifolds 15 and 16 are connected to the right sides of the left and right banks 11 and 12, respectively. The intake manifolds 13 and 14 are connected to a common intake pipe 17. On the other hand, the exhaust manifolds 15 and 16 are joined by an exhaust pipe 18, and exhaust is exhausted into the atmosphere through a muffler (not shown).

Intake pipes connected to the left and right intake manifolds 13 and 14
17 is connected to the intake pipe 17 by connection ports 21 and 22. A partition wall 23 is formed in the intake pipe 17 so as to partition the inside of the intake pipe 17. A curved butterfly valve 24 as shown in FIGS. 1 and 2 is mounted in the intake pipe 17 adjacent to the end of the partition wall 23. That is, the curved butterfly valve 24 and the partition wall 23 form a continuous curved surface. As shown in FIG. 2, the butterfly valve 24 is provided with support shafts 25 on the upper and lower sides thereof, respectively.
It is rotatably supported by. And the spindle 25 is the lever 26
And, it is connected to the piston rod 29 of the actuator 28 via the link 27. The actuator 28 is controlled by a control signal from the controller 30.

In the above-mentioned configuration, the butterfly valve 24 constitutes a noise suppressor valve and closes the intake pipe 17 when the exhaust brake is operated. That is, when the engine is required to generate a high braking force, an exhaust brake consisting of a butterfly valve attached to the exhaust pipe 18 closes the exhaust pipe 18. At the same time, the fuel supply to the engine is stopped. Therefore, the engine becomes a closed air pump. Therefore, the inertial force of the vehicle must drive the air pump that is blocked via the wheels, power line, and crankshaft, at which time the air pump, that is, the engine, becomes a high load and generates a large braking force. To do.

Since the exhaust pipe 18 is blocked by the exhaust brake, the intake pipe is
Intake air flows back into 17 and generates noise. In order to prevent this noise, the butterfly valve 24 is rotated by the actuator 28 to close the intake pipe 17.
Therefore, the noise suppressor valve including the butterfly valve 24 as described above can prevent the intake pipe 17 from generating a lump or an unpleasant noise when the exhaust brake is operated.

Butterfly valve 24 that constitutes a noise suppressor valve
Usually forms a partition wall continuous with the partition wall 23 as shown by the solid line in FIG. Moreover, the butterfly valve 24 is adapted to be rotated by a small angle by the actuator 28, thereby controlling the distribution amount of intake air to the left and right banks 11 and 12.

That is, the butterfly valve 24 has a curved shape that is continuous with the partition wall 23, and is attached adjacent to the end of the partition wall 23. Therefore, the butterfly valve 24 forms a curved surface continuous with the partition wall 23, and the butterfly valve 24 can be mounted at a position where pulsation can be used. Then, by rotating the butterfly valve 24 by a small angle, it becomes possible to control the distribution ratio of the intake air distributed to the left and right banks 11 and 12 through the partition wall 23. That is, it becomes possible to freely control the distribution ratio of the intake air to the left and right banks 11 and 12 by the butterfly valve 24 that also serves as the noise suppressor valve.

[Effect of device]

As described above, according to the present invention, the noise suppressor valve is composed of a curved butterfly valve, and the butterfly valve is provided in the vicinity of the partitioning means for supplying intake air by dividing into a plurality of cylinder groups. The distribution ratio of the intake air to the plurality of cylinder groups is controlled by rotating the cylinder group. Therefore, it becomes possible to control the distribution ratio of intake air by effectively utilizing the noise suppressor valve that closes the intake pipe at the time of operating the exhaust brake.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an intake pipe to which a noise suppressor valve according to an embodiment of the present invention is attached, FIG. 2 is an external perspective view of the noise suppressor valve, and FIG. 3 is an engine equipped with this noise suppressor valve. FIG. 4 is a plan view showing the intake system of this engine. The names of the main parts in the drawings are as follows. 11 …… Left bank 12 …… Right bank 13,14 …… Intake manifold 17 …… Intake pipe 23 …… Compartment wall 24 …… Butterfly valve 28 …… Actuator 30 …… Controller

Claims (1)

[Scope of utility model registration request] 1. A noise suppressor valve for closing an intake pipe when actuating an exhaust brake, wherein the noise suppressor valve comprises a butterfly valve, and a dividing means for supplying intake air to a plurality of cylinder groups. The butterfly valves are provided adjacent to each other, and the butterfly valves are curved so as to be continuous with the partitioning means, and the distribution ratio of intake air to the plurality of cylinder groups is controlled by rotating the butterfly balf. The noise suppressor valve is characterized in that