| 1/00 | Silencing apparatus characterised by method of silencing |
| 1/02 | Silencing apparatus characterised by method of silencing by using resonance |
| 1/04 | Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers |
| 1/06 | Silencing apparatus characterised by method of silencing by using interference effect |
| 1/08 | Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling |
| 1/10 | Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials |
| 1/12 | Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using spirally- or helically-shaped channels (F01N 1/1 takes precedence; cyclones B04C) |
| 1/14 | Silencing apparatus characterised by method of silencing by adding air to exhaust gases |
| 1/16 | Silencing apparatus characterised by method of silencing by using movable parts |
| 1/18 | Silencing apparatus characterised by method of silencing by using movable parts having rotary movement |
| 1/20 | Silencing apparatus characterised by method of silencing by using movable parts having oscillating or vibrating movement (the parts being resilient walls F01N 1/22) |
| 1/22 | Silencing apparatus characterised by method of silencing by using movable parts the parts being resilient walls |
| 1/24 | Silencing apparatus characterised by method of silencing by using sound-absorbing materials (F01N 1/04, F01N 1/06, F01N 1/1, F01N 1/14, F01N 1/16 take precedence) |
| 3/00 | Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N 9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00) |
| 3/01 | Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N 9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00) by means of electric or electrostatic separators |
| 3/02 | Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N 9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00) for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N 3/01) |
| 3/021 | Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N 9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00) for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N 3/01) by means of filters |
| 3/022 | Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N 9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00) for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N 3/01) by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous |
| 3/023 | Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N 9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00) for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N 3/01) by means of filters using means for regenerating the filters, e.g. by burning trapped particles |
| 3/025 | Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F01N 9/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00) for cooling, or for removing solid constituents of, exhaust (by means of electric or electrostatic separators F01N 3/01) by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust |