TWI299766B - - Google Patents

Description

1299766 IX. Description of the invention: • Technical field to which the invention pertains The invention belongs to the technical field of an exhaust gas treatment device for a diesel engine. [Prior Art] Diesel-fueled diesel vehicles have the advantages of high efficiency, fuel economy, and lower diesel prices than advanced gasoline. However, because the exhaust gas emitted by diesel engines is heavily polluted by air, it cannot be widely used. Therefore, if the problem of diesel engine exhaust gas can be solved, the advantages of diesel engine can be utilized. Diesel engines tend to emit solid fine carbon particles (Ρ Μ) due to incomplete combustion; and gaseous hydrocarbons (η C ), carbon monoxide (c 〇), and toxic nitrogen oxides (Ν〇χ). At present, the black smoke is filtered by a soot filter; the hydrocarbon and carbon monoxide in the exhaust gas are treated by a catalytic converter to oxidize hydrocarbons and carbon monoxide to water vapor and carbon dioxide, and are discharged into the atmosphere; as for toxic nitrogen oxides The treatment method is also actively developed. There are currently two systems, one is selective oxidation reduction developed by German β 〇• SC: Η (Seleetive

Reduction, hereinafter referred to as the S CR) system, and the other is the two schemes of the NOx adsorber (NOx Adsorber). The former can use urea and exhaust gas to reduce the nitrogen oxides into nitrogen (Ns) and water vapor (H2〇) in the air through a complicated chemical reaction, the efficiency can be as high as 8〇% or more; the latter is the carbon in the exhaust gas. The hydrogen compound (HC) acts as a catalyst to reduce NOx to nitrogen (N 2 ) and carbon dioxide (C〇2), although the system is still in the research stage. 4 1299766 The indication that the UR system is applied to a light diesel vehicle is provided with a supply device (Chuan, - Pharmaceutical storage: and injection control unit "1 2), wherein the supply device is provided with a transition device ( 410), the transition device (4 1 0) is a urea water wheel out of the waste... η, 翰出s ( 3 1 1 ) connected to the diesel engine ^ "4 〇", urea water output pipe " (1) Injecting the control unit (43) with the exhaust pipe (with a nozzle - 4 ) and the actuator (4 3 0) controls the nozzle to perform the injection operation. The medicine storage tube (4 2 ) is internally provided with a liquid level The sensor (4 2 3 - temperature sensor (4 2 1 )' avoids the urea water temperature being too low, and one sense (4 2 〇) is one of the warning lamps 3 units on the instrument panel ( 43) Electrical connection, when the liquid storage tank (42) is in the second: urea water (Μ 2) level is lower than the preset value, the warning light will

Is redundant warning, the injection control unit ^ early (4 3) does not start the actuator (4) 'so that the nozzle can not spray urea water, and the bottom of the drug storage tube through the - output tube (4 2 2) is connected Supply device (4) 5 1 ; top and second pass to urea water wheel outlet pipe (4 1 1 ), medicament error storage cylinder (4 P and - input pipe (4 2 3 ) connected to supply device (4 said injection The control unit (4 3 ) can be used as a reference factor for the speed of the engine, or as the starting condition of the control actuator (43〇), the control unit (43) When the price is measured to the engine's torque or the loss of the test factor reaches a predetermined value, the start (4) (4 3 Q), 3 water is sprayed into the exhaust pipe (40) through the nozzle, and the nitrogen discharged from the engine is 1299766. The oxygen compound produces a reduction reaction; or, when the injection control unit (43) detects that the exhaust gas inside the exhaust pipe (4 〇) reaches a certain value, the actuator (4 3 〇) is activated to inject the urea water. When the liquid level sensor (4 2 〇) of the drug storage tank (4 2 ) detects that the urea water in the cylinder is insufficient, the instrument panel The warning light will be released to inform the driver to refill the urea water. After the urea water is replenished, the warning light will be extinguished.

Precisely, although the S C R system has a sophisticated detection and warning design, even if the warning light is illuminated, the driver should be supplemented with urea water. If the driver adds the correct proportion of urea solution, the car can continue to drive. To this end, the EU in the _5 years of the U-month legislation on the post-processing system to add the drug only 2 specifications 'for example, the vehicle in the urea water reserves are insufficient or the injection action is not issued, inch, this is the day to inform the owner, if the owner ignores these warnings , then the engine month b should be limited, mu $ 丨 | β» main t soil, until the urea water is refilled to the post-processing system to operate effectively for this. Constantly speaking, 2, the correct addition of the pharmacy, for the future such vehicles will be ... ..., and the target drug storage cartridge is based on the liquid level as a detection of the ancient, not _ in the drug storage cylinder into which liquid, as long as The liquid level can be up to the preset position of the sensor. Therefore, if the owner adds the medicine to the spleen, although the vehicle can be mistakenly judged that the medicine has been added, it will cause post-treatment gas and pollute the environment.失去,,, 4 have lost their utility', resulting in a large amount of vehicle emissions. The waste is: 2: The driver: the driver injects the correct medicine (such as urea water). 1299766 SUMMARY OF THE INVENTION There is a drawback in the above-mentioned 4a. The main object of the present invention is to provide an automatic identification device capable of automatically identifying whether the medicine inside the drug storage cylinder is correct. Based on the above item, the main technical means of the present invention is to provide an automatic identification and sensing device for a vehicle exhaust aftertreatment system, comprising: a pharmacy storage tank, which can be filled with an aqueous solution of the medicament, and is adjacent to the circumference of the medicament storage tank. a drug sensor is further disposed, the drug sensor further includes a liquid level sensor and a resistance meter; the injection control is early, and the transmission M "tel丨rV, t- is electrically connected to the agent, and The injection control early element is electrically connected with the actuator; the instrument warning light is electrically connected to the injection control unit. After the implementation of the above technical means, the specific benefit obtained by the present invention, the resistance property of the aqueous solution of the new person is the preset value of the electric resistance meter, and the liquid surface temperature reaches the arrival of the liquid level sensor, and the main input (four) -* When the position is given, the signal can be transmitted to the Zhuangcheng technology system early, and the lamp _m 勖 is actuated in time, and the instrument warning bundle is turned off, if the right resistance is detected to the injection control The unit, and thus the control material, can transmit the signal. The driver can add the correct aqueous solution of the drug. Because the invention can correct the correctness of the resistor, the aqueous solution added by gw can be regulated. When the gas driver needs to add the correct diesel vehicle, the 'toxic nitrogen can be reduced' to the water and the 2,299,986 carbon to avoid environmental pollution and improve the existing high liquid level.乍 判断 判断 【 【 贯 【 【 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 巧 系统 系统 系统 系统 系统 系统 系统 系统 系统 系统 系统In the drug storage in the series, ·1, with the C 1 0), Ping (four) Cunjing (1 0) on the drug sensor..., and the agent sensor (]〗) Lei (1 1), one 丄 1) Connection injection control list and one and injection control (20),

1)) The instrument indicator light (P) and the music sensor (i) are connected electrically; (2) When the internal medicine has the correct medicine (10), the signal will be (2 0), and the instrument will be demolished. r. "The transfer to the injection control unit (2 〇) only -j, five 1) will go out, and the injection control sheet

Exhaust pipe = : Over-program control start actuator, /I tongue, , ', Shi (the control method is conventional, 0_非士糸重2, can not be described); if the drug sense is not enough in this case, The signal will: 2) Detect the pharmacy instrument warning light (21) and enter the control unit (20) to make the pharmacy misplaced tube (2 〇^ inform the driver that the drug solution should be supplemented with the drug solution number (1) " When the aqueous solution is not correct, the element (2〇) will cause the instrument to record the warning light to the injection control single-line injection action.) ^Redundant, and the control does not enter, please refer to the second figure, 1) The system includes a β I design Pharmacy sensor (1: position sensor (110) and a battery level sensor 丄丄◦) stored in the drug solution 10) detection drug storage tube (1 'return; and resistance The meter (丄丄丄) has 8 1299766 to test the same as the aqueous solution of the drug. If the injected tincture is different, the resistance of the solution will not sense the abnormal electricity. (ill) 〇), transfer the 塾/f^ number on the instrument panel to the injection control unit (2 action For example, urea hydrazine::: is warned, and the control does not carry out the mouth κ as the required aqueous solution of the drug. When the substance is not correct, the resistance field is added to transmit the signal. That is, the abnormal resistance is detected by the above. It can be seen that the drug sensor of the measuring instrument of the present invention has the resistance meter and the sense of liquid level from the quality of the aqueous solution of the measuring agent, and the honest driver adds an incorrect one to prevent environmental pollution. ^ 擎 所 排出 【 【 图 图 【 【 【 【 【 【 【 【 【 【 【 【 【 【 【 示意图 示意图 示意图 示意图 示意图 示意图 示意图 示意图 示意图 示意图 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Schematic diagram of SCR system. [Main component symbol description] (") drug storage 胄 (11) drug sensor 110) liquid level sensor (1 1 1) resistance leaf (2 〇) injection control unit (21) meter Police light "0) exhaust pipe ' (41) supply device (410) filter device (411) urea ") urea water storage cylinder (42 〇) liquid level sensing / (4 2 1 ), temperature sensor (4 2 2) Output tube 1299766 (4 3 ) injection control unit (4 3 Ο ) actuation

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Claims (1)

I299766 X. Patent application scope · Two types of diesel vehicle exhaust aftertreatment system automatic identification sensor device into the aqueous solution of the drug, in the drug storage 'the agent sensor into the step package a drug storage tube, the internal can be filled The peripheral wall is provided with a reagent sensor including a liquid level sensor and a resistance meter; an injection control unit is electrically connected to the medicament sensor, and the injection suppression unit is electrically connected with the actuator; a meter warning light is Electrically connected to the injection control unit. XI. Schema: as the next page 11