JPH04103242U - vehicle exhaust system - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to enable smooth and reliable operation of an exhaust brake shutter on the road side of a bypass ventilation system regarding a vehicle exhaust system. [Structure] A commonly operated exhaust brake valve is connected to the exhaust brake shutters provided on the trap ventilation system path and the bypass ventilation system path.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a vehicle exhaust system, especially an exhaust system for a vehicle equipped with a diesel engine. Regarding the location.

0002

[Conventional technology]

In recent years, exhaust systems for vehicles equipped with diesel engines have been In many cases, particulate traps are installed in the exhaust ventilation system to purify It has become to. In the exhaust system of such a vehicle, particulate matter is not allowed to pass through the exhaust ventilation system. The trap ventilation system route is divided into a trap ventilation system route with a bypass ventilation system route, and a bypass ventilation system route is installed with a trap. A trap ventilation shutter is installed in the ventilation system path, and a bypass ventilation shutter is installed in the bypass ventilation system path. (For example, Utility Model Application No. 2-27939).

0003 The above device is further equipped with an exhaust brake, and a trap ventilation system path and An exhaust brake shutter may be installed on each bypass ventilation system path, and each The exhaust brakes are activated by operating the exhaust brake shutters.

0004

[Problem that the idea aims to solve]

However, in such a device, the road side of the bypass ventilation system is equipped with a trap ventilation shutter. Table 1 shows the open/closed status of the shutter and bypass ventilation shutter during collection and regeneration. Bypass ventilation system only for short periods when regenerating particulate traps Since the shutter is opened and the road side of the bypass ventilation system is used, the exhaust on the road side of the bypass ventilation system is The brake shutter will not be used for a long time, and when you finally use it, it will stick. There is a risk that it may not operate smoothly.

Table 1 The present invention has been made in view of the above, and an object of the present invention is to provide an exhaust system for a vehicle in which an exhaust brake shutter on the road side of a bypass ventilation system can operate smoothly and reliably.

[0006]

[Means to solve the problem]

This invention uses a particulate trap installed in the middle of the exhaust ventilation system. The trap ventilation system route is branched into a bypass ventilation system route, and the trap ventilation system route is divided into a trap ventilation system route and a bypass ventilation system route. A bypass ventilation shutter is installed on the bypass ventilation system path and a trap is installed. For vehicles equipped with exhaust brake shutters on the ventilation system road and the bypass ventilation system road. In the exhaust system, an exhaust system provided in the trap ventilation system path and the bypass ventilation system path. Features a common operating exhaust brake valve connected to the air brake shutter. Ru.

[0007]

[Effect]

When operating the exhaust brake, operate the common operation exhaust brake valve. , regardless of when collecting particulates or regenerating particulate traps. First, the exhaust brake system installed on both the trap ventilation system path and the bypass ventilation system path. The shutters are simultaneously opened and closed to drive the exhaust brake. 1.The use of the exhaust brake shutter on the road side of the bypass ventilation system has increased. , the sticking of the exhaust brake shutter on the road side of the bypass ventilation system is eliminated.

[0008]

【Example】

Hereinafter, the present invention will be explained in detail with reference to the drawings. FIG. 1 shows an embodiment of a vehicle exhaust system according to the present invention. In the figure, 1 is a diesel engine, and diesel engine 1 has an exhaust gas An exhaust ventilation system path 2 for exhausting gas is connected. Exhaust ventilation system path 2 Trap ventilation system path 4 with particulate trap 3 and bypass ventilation system path It is branched into 5. Particulate trap 3 is, for example, a burner type. A burner device 6 is provided in front of the burner device.

[0009] The trap ventilation system path 4 provided with the particulate trap 3 has a particulate A trap ventilation shutter 7 is provided which opens when collecting the trap, while a bypass ventilation shutter 7 is provided. The air system path 5 has a bypass vent that is opened when the particulate trap 3 is regenerated. A shutter 8 is provided. Further, on the upstream side of the trap ventilation system path 4 where the trap ventilation shutter 7 is provided, , an exhaust brake shutter 9 is provided, while a bypass ventilation shutter 8 is provided. An exhaust brake shutter 10 is also provided on the upstream side of the bypass ventilation system path 5. There is.

0010 The exhaust brake shutter 9 and the exhaust brake shutter 10 have a common operating exhaust. A brake valve 11 is connected, and the operated exhaust brake valve 11 is supplied with air, for example. A reservoir 12 is connected. In addition, a manual switch 13 and a clutch are connected in series to the operation exhaust brake valve 11. A switch 14 and an accelerator switch 15 are electrically connected. In addition, the above exhaust A muffler 16 is provided on the downstream side of the ventilation system path 2.

[0011] When collecting particulates, the trap ventilation shutter should be installed as shown in Table 1. 7 and close the bypass ventilation shutter 8 to trap the exhaust gas. 4 side to collect particulates. On the other hand, when playing Particulate Trap 3, the trap Close the ventilation shutter 7 and open the bypass ventilation shutter 8 to bypass the exhaust gas. The gas is flowed to the ventilation system path 5 side, and in that state, the particulate transport is caused by the burner device 6. playback of tap 3.

0012 Also, all of the manual switch 13, clutch switch 14, and accelerator switch 15 are is turned on, switch the operating exhaust brake valve 11 to release the air reservoir. 12 to the exhaust brake shutters 9 and 10 via the operated exhaust brake valve 11. Exhaust brake shutter 9 and exhaust brake shutter 1 that are open after supplying air 0 at the same time and apply the exhaust brake.

[0013] On the other hand, the manual switch 13, clutch switch 14, and accelerator switch 15 are If either of them becomes 0FF, it will be released to the atmosphere and the operation exhaust brake valve 11 will be activated. The exhaust brake will no longer apply. According to such a vehicle exhaust system, when collecting particulates, particulates are Trap ventilation system path 4 and bypass ventilation system path 5 regardless of when the trap is regenerated. Exhaust brake shutters 9 and 10 provided on both sides are simultaneously driven to open and close to release the exhaust gas. The brakes are applied. As a result, the exhaust brake shutter on the bypass ventilation system path 5 side is The exhaust brake shutter on the bypass ventilation system path 5 side is 10 can be prevented from sticking.

[0014]

[Effect of the idea]

As explained above, this invention enables the roadside exhaust brake shutter of the bypass ventilation system to It can operate smoothly and reliably.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

[Explanation of symbols]

2 Exhaust ventilation system path 3 Particulate trap 4 Trap ventilation system path 5 Bypass ventilation system path 7 Trap ventilation shutter 8 Bypass ventilation shutter 9,10 Exhaust brake shutter 11 Operation exhaust brake valve

Claims (1)

[Scope of utility model registration request] Claim 1: The exhaust ventilation system path is branched into a trap ventilation system path provided with a particulate trap and a bypass ventilation system path, a trap ventilation shutter is provided in the trap ventilation system path, and a bypass ventilation shutter is provided in the bypass ventilation system path. In an exhaust system for a vehicle in which a trap ventilation system path and a bypass ventilation system path are each provided with an exhaust brake shutter, an operating exhaust brake valve common to the exhaust brake shutters provided in the trap ventilation system path and the bypass ventilation system path is provided. A vehicle exhaust system characterized by connecting two.