System for injecting an aqueous solution into an injection engine
AssigneePlastic Omnium Advanced Innovation and Research
InventorsFranck Dhaussy, Stephane Leonard, Laurent Duez, Pierre Oszwald
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Abstract
A system for injecting an aqueous solution into an injection engine, includes: a tank for an aqueous solution, a circuit for supplying aqueous solution to the tank and a filter for filtering the aqueous solution, and a circuit for recirculating the aqueous solution. The injection system also includes recirculation of the aqueous solution, and is provided with an electrovalve including a first inlet connected to a filler neck of the tank, a second inlet connected to the recirculation circuit, and an outlet connected to the supply circuit. The filtration filter is arranged in the supply circuit and/or in the recirculation circuit.
Claims16
A system for injecting an aqueous solution into an injection engine, comprising a tank for an aqueous solution, a circuit for supplying aqueous solution to said tank and a filter for filtering the aqueous solution, a pump for pumping the aqueous solution, and a circuit for recirculating said aqueous solution,
- wherein the system further comprises an electrovalve comprising:
- a first inlet connected to a filler neck of the tank,
- a second inlet connected to the recirculation circuit, and
- an outlet connected to the supply circuit, and
- wherein said filtration filter is placed in said supply circuit and/or in said recirculation circuit.
A process for diagnosing the purity of an aqueous solution for a system for injecting an aqueous solution into an injection engine, comprising:
- a. measuring a physicochemical property a of an aqueous solution contained in a tank,
- b. comparing the physicochemical property σm measured in step a) to a range of reference values [σref.min, σref.max] wherein σref.min is a minimum reference value and σref.max is a maximum reference value,
- c. sending said aqueous solution into (i) a demineralization filter if the physicochemical property σm measured in step a) is outside said range of reference values [σref.min, σref.max], or into the engine if the physicochemical property σm measured in step a) is inside said range of reference values [σref.min, σref.max],
- d. repeating steps a), b) and c) as long as the physicochemical property σm measured in step a) is outside said range of reference values [σref.min, σref.max], and
- e. announcing with a signal S a problem if, after a predetermined period of time T, the measured physicochemical property σm remains outside said range of reference values [σref.min, σref.max],
- wherein the process is controlled by an electronic control unit (ECU).
Dependencies are inferred from the claim text.