JPH0452522U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an engine exhaust purification device according to a first embodiment of the present invention. FIGS. 2 and 3 are explanatory views of the operating state of the exhaust purification device of the same engine. FIG. 4 is a block diagram of an engine exhaust purification device according to a second embodiment of the present invention. FIG. 5 is a configuration diagram of a conventional engine exhaust purification device. Explanation of symbols of main parts, 2...Exhaust passage, 2
A... branching part, 2B... joining part, 3... filter member, 4... heating device, 5... first exhaust bypass passage, 6... first on-off valve, 7... second on-off valve,
9... Third on-off valve, 10... Surge tank, 11
...Second exhaust bypass passage, 12...Fourth on-off valve.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A filter member that collects exhaust particulates such as carbon particles in the exhaust gas and a heating device that burns the carbon particles collected in the filter member are disposed in the exhaust passage of the engine. A first exhaust bypass passage bypassing the filter member and the heating device is connected to the exhaust passage, and a first exhaust bypass passage in the exhaust passage is connected to the exhaust passage.
A first on-off valve is disposed between the branch part with the exhaust bypass passage and the filter member, and a second on-off valve is disposed downstream of the confluence part with the first exhaust bypass passage in the exhaust passage. A third on-off valve is disposed in the first exhaust bypass passage, and a portion of the exhaust passage between the first on-off valve and the filter member and a downstream side of the second on-off valve are connected by the second exhaust bypass passage. A fourth on-off valve is disposed in the second exhaust bypass passage, and the first on-off valve and the second on-off valve of the exhaust passage are closed, and the third on-off valve and the fourth on-off valve of both exhaust bypass passages are closed. In an engine exhaust purification device that causes exhaust gas to flow backward through a filter member when opened,
An exhaust purification device for an engine, characterized in that a surge tank is disposed upstream of the third on-off valve in the first exhaust bypass passage and stores exhaust gas by closing the third on-off valve and the first on-off valve. (2) A filter member for collecting exhaust particulates such as carbon particles in the exhaust gas and a heating device for burning the carbon particles collected by the filter member are disposed in the exhaust passage of the engine, and in this exhaust passage, In an engine exhaust purification device comprising an exhaust bypass passage that bypasses a filter member and a heating device, a part of the exhaust passage between the branch part of the exhaust bypass passage and the filter member is provided with A first on-off valve that is open when carbon particles are combusted and closed when calcium sulfate fine particles are removed is disposed downstream of the confluence with the exhaust bypass passage in the exhaust passage. A second on-off valve that is open during particle combustion and open when calcium sulfate particulates are removed is disposed, and a third on-off valve that is open when calcium sulfate particulates are removed is provided in the exhaust bypass passage. An exhaust branch pipe having a collection material for calcium sulfate particulates is connected to the part of the passage between the first on-off valve and the filter member, and an exhaust particulate collection part is connected to the upstream side of the collection material of the exhaust branch pipe. 1. An exhaust gas purification device for an engine, characterized in that a fourth on-off valve is provided, which is closed when the filter member is regenerated and opened when calcium sulfate fine particles are removed.