JPH0487320U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of this invention. Figure 1 is a schematic configuration diagram showing the main parts of a diesel engine exhaust gas treatment device, and Figure 2 is a diesel engine exhaust gas treatment device. A schematic configuration diagram of the entire device, FIG. 3 is a vertical sectional view showing the schematic configuration of the particulate trap, FIG. 4 is a front view showing the end face of the particulate trap, and FIG. 5 shows the connection state of the controller. 6 is a flowchart for explaining the regeneration processing operation of the particulate trap, and FIG.
FIG. 8 is a timing chart showing the operation timings of each switching valve, heater switch, and air pump. FIG. 8 is a schematic diagram of the main parts of a conventional example. 2...Exhaust gas passage, 5...Cylindrical container, 6A
...First particulate trap, 6B...
Second particulate trap, 10A...first heater, 10B...second heater, 19...
Auxiliary exhaust outflow passage, 23...Distribution supply mechanism, 30
...Regeneration air supply mechanism.

Claims (1)

[Scope of Claim for Utility Model Registration] A particulate trap that collects particulate in exhaust gas is disposed in a cylindrical container, and a regeneration system that burns the particulate collected in the particulate trap. In the exhaust gas treatment device, the pair of particulate traps are placed inside the cylindrical container, and the exhaust gas treatment device is provided with a regeneration air supply mechanism that supplies regeneration air for burning the particulate into the cylindrical container. The regeneration heaters are arranged in series on the upstream and downstream sides of these particulate trap rows, and the particulate traps on the upstream and downstream sides of the cylindrical container are An auxiliary exhaust outlet passage for regeneration is provided at a portion corresponding to the area between the traps, and one end thereof is connected to the particulate trap, and the regeneration air supplied from the regeneration air supply mechanism is passed through the upstream side during regeneration of the particulate trap. An exhaust gas treatment device comprising a distribution supply mechanism for supplying regeneration air into the cylindrical container from the upstream and downstream sides of each of the regeneration heaters.