| 摘要 |
<p>The invention relates to a method for repriming a system for injecting a liquid additive in an exhaust system of a motor having a heat engine, wherein the injection system comprises: a tank for the additive; a hydraulic circuit for conveying said additive to one or more injectors; a pump for pumping the additive contained in said tank; in said hydraulic circuit, a valve positioned over the length of said hydraulic circuit; and an accumulator for said liquid additive on said hydraulic circuit. The invention is characterized in that it includes the steps of: refilling the accumulator with liquid additive; detecting the presence of air in the hydraulic circuit upstream from the accumulator; stopping the refill of liquid additive into the accumulator; depressurizing the hydraulic circuit between the tank and the accumulator; and discharging the air contained in the hydraulic circuit between the tank and the accumulator. The invention is can be used in particular in systems for injecting a mixture of water and urea for vehicles, the engine of which uses diesel fuel.</p> |
