(0)F01N:0/0:
IPC6
SECTION F - MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS;BLASTING
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR...
F01N
1/1

F 01 N

 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 B 60 K 13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F 02 M 35/00; protecting against, or damping, noise in general G 10 K 11/16)
 

Note
 

Attention is drawn to the Notes preceding class F 01, especially as regards Note (3).

 

 

 
 

 1
/ 00 Silencing apparatus characterised by method of silencing

1
/ 02 • by using resonance  

1
/ 04 • • having sound-absorbing materials in resonance chambers  

1
/ 06 • by using interference effect  

1
/ 08 • by reducing exhaust energy by throttling or whirling  

1
/ 10 • • in combination with sound-absorbing materials  

1
/ 12 • • using spirally- or helically-shaped channels (F 01 N 1/10 takes precedence; cyclones B 04 C)  

1
/ 14 • by adding air to exhaust gases  

1
/ 16 • by using movable parts  

1
/ 18 • • having rotary movement  

1
/ 20 • • having oscillating or vibrating movement (the parts being resilient walls F 01 N 1/22)  

1
/ 22 • • the parts being resilient walls  

1
/ 24 • by using sound-absorbing materials (F 01 N 1/04, F 01 N 1/06, F 01 N 1/10, F 01 N 1/14, F 01 N 1/16 take precedence)  
 

 3
/ 00 Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust (electric control F 01 N 9/00) [4]

3
/ 02 • for cooling, or for removing solid constituents of, exhaust  

3
/ 04 • • using liquids  

3
/ 06 • for extinguishing sparks  

3
/ 08 • for rendering innocuous  

3
/ 10 • • by thermal or catalytic conversion of noxious components of exhaust (by using other chemical processes, chemical aspects of catalytic conversion, e.g. using specified catalysts, B 01 D 53/34) [3]  

3
/ 18 • • • characterised by methods of operation; Regulation [3]  

3
/ 20 • • • • specially adapted for catalytic conversion (F 01 N 3/22 takes precedence) [3]  

3
/ 22 • • • • Regulation of additional air supply only, e.g. using by-passes or variable air pump drives [3]  

3
/ 24 • • • characterised by constructional aspects of converting apparatus [3]  

3
/ 26 • • • • Construction of thermal reactors [3]  

3
/ 28 • • • • Construction of catalytic reactors [3]  

3
/ 30 • • • • Arrangements for supply of additional air (regulation, e.g. using by-passes or variable air pump drives, F 01 N 3/22) [3]  

3
/ 32 • • • • • using air pumps (using jet air pumps F 01 N 3/34; pumps in general F 04) [3]  

3
/ 34 • • • • • using air conduits or jet air pumps, e.g. near the engine exhaust port [3]  

3
/ 36 • • • • Arrangements for supply of additional fuel [3]  

3
/ 38 • • • • Arrangements for igniting [3]  
 

 5
/ 00 Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy (using kinetic or wave energy of exhaust gases in exhaust systems for charging F 02 B ; predominant aspects of such devices, see the relevant classes for the devices)

5
/ 02 • the devices using heat  

5
/ 04 • the devices using kinetic energy  
 

 7
/ 00 Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F 01 N 1/00 to F 01 N 5/00

7
/ 02 • Apparatus having two or more separate silencers in series  

7
/ 04 • Apparatus having two or more silencers in parallel, e.g. having interconnections for multi-cylinder engines  

7
/ 06 • specially adapted for star-arrangement of cylinders, e.g. exhaust manifolds  

7
/ 08 • Other arrangements or adaptations of exhaust conduits (pipes in general F 16 L)  

7
/ 10 • • of exhaust manifolds  

7
/ 12 • specially adapted for submerged exhausting  

7
/ 14 • having thermal insulation  

7
/ 16 • Selection of particular materials  

7
/ 18 • Construction facilitating manufacture, assembly, or disassembly  

7
/ 20 • Flared outlets, e.g. of fish-tail shape  
 

 9
/ 00 Electrical control of exhaust gas treating apparatus (conjoint electrical control of two or more combustion engine functions F 02 D 43/00) [4]