F01N

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Description

GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K 13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M 35/00; protecting against, or damping, noise in general G10K 11/16)

Subclasses

SubclassTitle
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

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