| 摘要 |
<p>PCT No. PCT/SE92/00101 Sec. 371 Date Aug. 19, 1993 Sec. 102(e) Date Aug. 19, 1993 PCT Filed Feb. 20, 1992 PCT Pub. No. WO92/14912 PCT Pub. Date Sep. 3, 1992A method and a device are disclosed for catalyst emission control including an electrically heated startup catalyst which is positioned adjacent a main catalyst in the exhaust pipe associated with the engine. Also provided are a source of current, a switch, a control unit, a lambda sensor, and an electrically operated air pump including and air channel inserted between the lambda sensor and the startup catalyst. In connection with startup of the engine the startup catalyst and/or the air pump are activated by means of the control unit. The invention provides improved purification of the exhaust gases emitted by the engine.</p> |
