| 摘要 |
<p>PURPOSE:To precisely regenerate, a trap for the afterburner in the caption by calculating the fore and aft differencial pressure ratio between the trap and a fixed restriction connected to the lower course of the trap and starting the afterburning of the trap when the ratio exceeds a reference value. CONSTITUTION:An inlet pressure sensor 12 for detecting the inlet side pressure (in reference atmospheric pressure) of a trap 1 and a differential pressure sensor 13, etc., which detects the pressure loss of the trap 1 i.e. a fore and aft differential pressure sensor 13 are provided and those detected signals are input to a controller 14. In this controller 14, the fore and aft differential pressure of the fixed restriction 2 of an exhaust silencer, etc., connected to the lower course of the trap 1 is calculated due to the inlet signal and also the fore and aft differential ratio between the trap 1 and the fixed restriction 2 is calculated. The fore and aft differential pressure ratio is compared with a predetermined reference value and in case the fore and aft differential pressure ratio exceeds the reference value, it is judged that the particulate collection is in its stable of completion and an electric current is sent to an electric heater 4 to start the afterburning process of the trap 1.</p> |
