Online diesel exhaust fluid solution concentration monitoring system and monitoring method for automobile SCR system

Abstract

The invention discloses an online diesel exhaust fluid solution concentration monitoring system for an automobile SCR (Selective Catalytic Reducer) system. The online diesel exhaust fluid solution concentration monitoring system comprises a power module, a coil design module and a data acquiring and processing module, which are sequentially connected through SMA (SubMiniature version A) connectors, wherein the coil design module comprises a transmitting coil, a urea tank and a receiving coil; the urea tank is used for being filled with a urea solution; the transmitting coil and the receiving coil are arranged at the outer side of the urea tank; the transmitting coil is connected with the power module through the SMA connector; the receiving coil is connected with the data acquiring and processing module through the SMA connector. The online diesel exhaust fluid solution concentration monitoring system avoids the contact between the measuring coil and the urea solution, adopts a self-resonance mode of the coil, and improves the sensitivity of the voltage at the two ends of the coil on change of concentration of the urea solution. The invention further discloses a monitoring method of the online diesel exhaust fluid solution concentration monitoring system for the automobile SCR system.

Description

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AI Technical Summary

Benefits of technology

This technology uses magnetism (magnetic force) instead of electrical conductors to detect liquids accurately without physical touching them during measurement or reagent addition. It also allows for more precise measurements by adjusting the strengths applied to the sensor's own oscillator circuitry. Additionally, this system combines two methods - one involves placing an external copper wire near the liquid level inside the container that helps reduce interference from other substances like gases and solvents used when adding chemical agents into the urethane resin mixture.

Problems solved by technology

The technical problem addressed in this patents relates to improving the efficiency of reducing nitrogen oxide (NO2) from diesel vehicles' tailpipe during combustion processes without increasing their weight. Current systems use expensive catalyst materials like selective reduction technology (SCR). However, there may be issues where excess urease cannot detect accurately due to its high solubility in water. Additionally, existing diagnostic techniques such as fluid levels have limitations when applied over large areas because they require long periods before accurate results can become apparent even under ideal conditions.

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