Diesel particulate oxidizer regeneration system.

摘要

1. In a diesel engine (E) having a fuel injection pump (17) and a fuel control means (18) for controlling the injection volume or injection timing of that fuel injection pump (17), a diesel particulate oxidizer regeneration system (DPO) includes a diesel particulate oxidizer (5) disposed in an exhaust system of the diesel engine (E) and having a trap carrier for collecting unburnt fine particles contained in exhaust gas, said trap carrier supporting an oxidation catalyst; a regeneration means for burning the inburnt fine particles collected in said diesel particulate oxidizer (5); a regeneration end control means (100) for detecting the quantity of the unburnt fine particles collected and deposited in the diesel particulate oxidizer (5) has become less than the predetermined value after combustion, and producing a signal for stopping the operation of said regeneration means, comprising a regeneration timing contol means including an operation history storing means (ECU 9) for storing and adding operation hystereses of the engine (E), and judging means for judging the operations start timing of said regeneration means on the basis of the stored value of said operation history storing means; and the stored value of said operation hystory storing means (ECU 9) being set to an operation history initial value upon detection of a regeneration end of said diesel particulate oxidizer (5) by said regeneration detection control means (100).