| 摘要 |
<p>1,071,984. Purifying exhaust gases. BENTELER-WERKE A. G. March 3, 1965 [March 4, 1964], No. 9110/65. Heading F1B. Exhaust gases from an I. C. engine, mixed with air, flow inwardly through a spiral conduit 1 to a catalyst-filled combustion chamber 3, purified gases passing to atmosphere via a spiral conduit 2, in heat exchange relationship with conduit 1. The catalyst is mounted in a housing 11, at least wall 13 of which is sieve-like to permit the exhaust gases and air to enter the combustion chamber. A baffle plate 16, which may be apertured, surrounds an incandescent plug 14 so that a conical region of the catalyst surrounding the plug is substantially shielded from the exhaust gas flow and thus not cooled thereby. When the temperature of the purified gases becomes excessive, a bi-metallic strip (not shown) in conduit 2 is operative to open a passage between conduits 1 and 2, the exhaust gases then by-passing the combustion chamber. Alternatively, this passage may be opened by an electromagnet (27), Fig. 4 (not shown) controlled by a temperature responsive element (26) embedded in the catalyst. The element 26 may also control a further electromagnet operative to obstruct air supply ports, Figs. 6 and 7 (not shown), in the engine exhaust pipe, or may alternatively control a blower supplying the air.</p> |
