JPS6240123Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a surge noise reduction device for a vehicle such as an automobile that has a turbocharger in its intake system, that is, a vehicle with a turbocharger (hereinafter referred to as a turbo vehicle).

[Conventional technology and problems]

In a turbocharged car, when the accelerator is fully opened after sudden acceleration, a surging sound (sighing sound) is generated due to the surging of the turbocharger blower.
Although it is desired to reduce this noise, conventionally there has been no device for reducing surge noise. In response to the above-mentioned demands, this invention has a simple and compact structure, does not reduce engine output during acceleration, and reduces surge noise and intake system noise during normal driving. The purpose of the present invention is to provide a surge noise reduction device for turbo cars that can achieve the following.

[Means to solve the problem]

In order to achieve this purpose, the surge noise reduction device for a turbo vehicle according to the present invention forms a long intake passage from the intake port to the air cleaner intake via a folded part, and also The atmosphere side communicates with the air cleaner side from the folded portion of the intake passage through an output valve that opens only when the amount of intake air is insufficient.

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes an intake passage, and this intake passage 1 is configured to extend from an intake port 3 opening in an upper frame 2 to an intake port 5 of an air cleaner 4. In addition, the intake passage 1 is partitioned between the Atsupa frame 2 and the front wheel apron 6 by two partition plates 7 and 8, and a partition plate fixed to the Atsupa frame 2 that is spaced from one of these and close to the other. 9 is disposed substantially parallel to the front wheel apron 6, and has a long bifold path with the above-mentioned interval as a folded portion 10. Note that the end portion 11 of the partition plate 9 on the side of the folded portion 10 is formed into a substantially circular cross-section to reduce passage resistance. The intake passage 1 communicates with the air cleaner 4 intake port 5 via a communication hole 12 provided in the front wheel apron 6 and a duct 13. The partition plate 9 has an output valve 1 such as a rubber flap that opens only when the amount of intake air is insufficient, such as during acceleration.
4 is opened, and the auxiliary intake port 15 is arranged between the intake port 3 and the communication hole 12 in substantially a straight line therebetween, and outputs a portion of the intake passage 1 near the communication hole 12. It is communicated with the atmosphere through a valve 14. The outlet side of the air cleaner 4 is connected to the suction side of a turbocharger 18 via an air flow meter 16 and a boot 17, and the discharge side of the turbocharger 18 is connected to a throttle body 20 via an intake duct 19. In addition, in the figure, the code|symbol 21 is a fender. Since the present embodiment is configured as described above, during normal operation, air enters the intake passage 1 from the intake port 3, is turned back at the folded part 10, and is normally transported through the communication hole 12 and the duct 13. The air is drawn into the air cleaner 4 with a passage length approximately twice that of this type of intake passage, and the air flow meter 16 and boot 1 are
7, the air is guided to the throttle body 20 through the turbocharger 18 and the intake duct 19. In addition, the intake passage 1 has a long passage length and is bent at folded parts 10, etc., and the air is squeezed at the folded parts 10, so that the absolute value of noise in the intake system is reduced. In addition, if the air is strongly squeezed at the folded part, the noise reduction effect will be improved, but the amount of intake air will be reduced.
Since a problem arises in which the output of the engine decreases, in this embodiment, an auxiliary intake port 15 having a normally closed output valve 14 is provided, and the intake valve 14 is opened by negative suction pressure when the accelerator is pressed during acceleration. According to
From the intake port 3 through the auxiliary intake port 15 to the folded part 10
A short, almost straight path short-circuiting the intake passage 1
Air is sucked into the portion near the communication hole 12 from the atmosphere side. Therefore, a sufficient amount of intake air during acceleration is ensured, and a decrease in output is prevented. Furthermore, when the accelerator is released, the amount of intake air is unnecessary or small, and the output valve 14 closes the auxiliary intake port 15 with its own elastic restoring force, so it is possible to prevent the generation of surge noise. Therefore, the device of this embodiment can reduce the surge noise of the turbocharger 18 without reducing the engine output during acceleration, and can also reduce the noise during normal driving. Furthermore, the device of this embodiment only requires adding the partition plates 7, 8, 9 and the output valve 14 to the existing parts conventionally used in automobiles, and has a simple, compact, and lightweight structure. Since it is stored inside the apron 6, it is possible to use space effectively without deteriorating the appearance, and it is inexpensive.Furthermore, the simple structure means that there are few breakdowns and almost no maintenance is required. . In the present invention, the intake air does not necessarily need to be throttled at the folded portion, and the position and constituent members of the intake passage are not limited to those in the embodiments described above, and can be changed as appropriate.

[Effect of the idea]

As explained above, the surge noise reduction device for a turbocharged vehicle according to the present invention sucks air into the air cleaner through a long intake passage having a folded part. In addition to reducing engine surge noise and intake noise during normal driving, the output valve is opened during acceleration, etc., and air is inhaled through a short passage length without passing through the folded part, which improves engine performance. No reduction in output,
In addition, the structure is simple and compact, requires only a small installation space, can be provided at low cost, has fewer breakdowns, and requires almost no maintenance.

[Brief explanation of the drawing]

The figure is a partially sectional schematic plan view showing an embodiment of the present invention. 1...Intake passage, 2...Atsupa frame, 3...
...Intake port, 4...Air cleaner, 5...Intake port,
6...Front wheel apron, 7, 8, 9...
...Partition plate, 10...Folded part, 11...End part, 1
2...Communication hole, 13...Duct, 14...Output valve, 15...Auxiliary intake port, 16...Air flow meter, 17...Boot, 18...Turbo charger, 19...Intake duct, 20...Throttle body , 21... Fuenda.

Claims (1)

[Scope of utility model registration request] A surge noise reduction device for a turbocharged vehicle, characterized in that a long intake passage is formed from the intake port to the intake port of the air cleaner via a turn-around section, and the atmosphere side is connected to the air cleaner side from the turn-around section of the intake passage via an output valve that opens only when the amount of intake air is insufficient, such as during acceleration.