JPH01105718U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to claims of the present invention, Fig. 2 is a configuration diagram showing an embodiment of the present invention, Fig. 3 is a flowchart of the same, and Figs. 4 to 6 are for explaining the operation of the same. and FIG. 7 are configuration diagrams showing a conventional example of an exhaust particulate processing device. 21... Diesel engine, 22... Exhaust passage, 24
...Trap with catalyst, 25...Exhaust bypass passage, 2
6...Switching valve, 28...Diaphragm, 29...Three-way solenoid valve, 30...Control device, 31...First exhaust temperature sensor, 32...Rotation speed sensor, 34...Load sensor,
35...Second exhaust temperature sensor.

Claims (1)

[Scope of utility model registration request] In an exhaust particulate treatment device for an internal combustion engine in which a collection device for collecting exhaust particulates is interposed in the exhaust passage of the engine, an exhaust bypass passage that bypasses the collection device and an operating state of the engine are detected. an engine operating state detection means for detecting an exhaust gas temperature on the inlet side of the collection device; an outlet side exhaust gas temperature detection means for detecting an exhaust gas temperature on the outlet side of the collection device; Based on the inlet-side exhaust gas temperature and the outlet-side exhaust gas temperature, the target exhaust bypass operation area or the target exhaust bypass stop operation area is set in stages so that the lower the exhaust temperature, the wider the operation area where the exhaust gas is bypassed. An internal combustion engine comprising a target operating range setting means for setting a target operating range, and a valve device that opens and closes an exhaust bypass passage by comparing the detected actual engine operating state and the set target operating range. Exhaust particulate treatment equipment.