| 60 / | HD | POWER PLANTS |
| 272 | DF | INTERNAL COMBUSTION ENGINE WITH TREATMENT OR HANDLING OF EXHAUST GAS {18} |
| 282 | DF | .~ By means producing a chemical reaction of a component of the exhaust gas {13} |
| 287 | DF | .~.~ Condition responsive control of reactor feed, pressure, or by-pass {3} |
| 289 | | .~.~.~ Air feed to reactor modulated or diverted by control {1} |
| 290 | DF | .~.~.~.~> Responsive to engine speed or intake manifold pressure |