阅读说明：本技术 引入机油消耗维度的催化剂台架快速老化装置及老化方法 (Rapid aging device and aging method for catalyst rack introducing engine oil consumption dimension ) 是由 王云锋 董卿 侯富华 华耀 范文辉 林帅帅 周峰 朱云 毛冰斌 于 2021-06-17 设计创作，主要内容包括：本发明涉及一种引入机油消耗维度的催化剂台架快速老化方法。本发明的老化装置包括定量泵、容器、喷嘴、发动机及催化剂,还包括反映机油消耗量维度的机油桶,所述发动机上设置有进气歧管和排气歧管,所述进气歧管上连接有喷嘴,所述喷嘴的进口端连接有压缩空气和机油管,所述机油管的自由端伸入所述容器的底部,所述容器与机油桶之间设置有定量泵,所述定量泵的一端连接在所述机油桶的底部,另一端连接在所述容器内部的上部,所述排气歧管的出口端设置有催化剂。本发明在原来台架老化模式的基础上,增加了机油消耗维度,使高温失活与化学中毒同时作用到催化剂上,制备出更接近实车耐久的快速老化催化剂。(The invention relates to a rapid aging method of a catalyst rack with engine oil consumption dimension introduced. The aging device comprises a constant delivery pump, a container, a nozzle, an engine, a catalyst and an engine oil barrel reflecting the dimension of engine oil consumption, wherein an air inlet manifold and an exhaust manifold are arranged on the engine, the nozzle is connected to the air inlet manifold, the inlet end of the nozzle is connected with compressed air and an engine oil pipe, the free end of the engine oil pipe extends into the bottom of the container, the constant delivery pump is arranged between the container and the engine oil barrel, one end of the constant delivery pump is connected to the bottom of the engine oil barrel, the other end of the constant delivery pump is connected to the upper part inside the container, and the outlet end of the exhaust manifold is provided with the catalyst. On the basis of the original rack aging mode, the engine oil consumption dimension is increased, high-temperature inactivation and chemical poisoning are simultaneously acted on the catalyst, and the quick aging catalyst which is more close to the actual durability is prepared.)

1. A catalyst rack rapid aging device introducing engine oil consumption dimension is characterized by comprising a constant delivery pump (2), a container (3), a nozzle (4), an engine (6), a catalyst (8) and an engine oil barrel (1) reflecting the engine oil consumption dimension, the engine (6) is provided with an intake manifold (5) and an exhaust manifold (7), the air inlet manifold (5) is connected with a nozzle (4), the inlet end of the nozzle (4) is connected with a compressed air and engine oil pipe (9), the free end of the engine oil pipe (9) extends into the bottom of the container (3), a constant delivery pump (2) is arranged between the container (3) and the engine oil barrel (1), one end of the constant delivery pump (2) is connected to the bottom of the engine oil barrel (1), the other end of the constant delivery pump is connected to the upper portion inside the container (3), and a catalyst (8) is arranged at the outlet end of the exhaust manifold (7).

2. A method for rapid aging of a catalyst table incorporating oil consumption dimensions, wherein the aging is performed on the aging apparatus of claim 1, comprising the steps of:

step S1, assembling the apparatus: one end of the nozzle (4) is connected with an air inlet manifold (5) on an engine (6), the other end of the nozzle is connected with compressed air and an engine oil pipe (9), the engine oil pipe (9) extends into the bottom of a container (3), one end of a constant delivery pump (2) is arranged at the bottom of the engine oil barrel (1), the other end of the constant delivery pump is arranged at the upper part inside the container (3), and a catalyst (8) is arranged at the rear part of an engine exhaust manifold (7);

step S2, preparing the amount of consumed engine oil for the test: collecting the oil amount data consumed by 20 kilometers of finished automobile running on a road by the catalyst (8), preparing the same amount of engine oil as the consumed oil amount of rapid aging of a rack, and injecting the required engine oil into the engine oil barrel (1);

step S3, aging test: the engine (6) is started, the aging circulation working condition is entered, the compressed air connected with the nozzle (4) is opened, the constant delivery pump (2) is started, the engine oil is pumped into the container (3) from the oil drum (1) at a set flow rate, the nozzle (4) sucks and atomizes the engine oil in the container (3) by using the negative pressure generated by the jet type atomization principle, the atomized engine oil is sucked into the air inlet manifold (5) after being mixed with the air, the combustion is participated in the engine cylinder, and the normal engine oil consumption condition in the road running of the real vehicle is simulated.

3. The method for rapid aging of a catalyst table introducing the dimension of oil consumption according to claim 2, characterized in that the flow rate of the fixed displacement pump (2) is 0.5-15mL/min, and the set flow rate is the amount of oil required in step S2 divided by the aging period.

4. The method for rapid aging of catalyst beds introducing oil consumption dimension as claimed in claim 2, characterized in that the pressure of the compressed air entering the nozzle (4) in step S3 is 0.1-0.5 kPa.

Technical Field

The invention belongs to the technical field of catalyst preparation, and particularly relates to a quick aging device and an aging method for a catalyst rack with engine oil consumption dimension introduced.

Background

At present, China already executes the national six-stage emission standard, the requirement on the emission durability of the whole vehicle is improved from 16 kilometers in the fifth stage of China to 20 kilometers in the sixth stage of China, and the requirement on the durability of a post-treatment catalyst is further improved.

The emission calibration in the whole vehicle development stage needs to provide three-way catalysts in different states, wherein the emission calibration of the rapidly-aged catalyst is an important work, the existing vehicle catalyst aging method mainly comprises rapid aging of a bench engine, namely a rapid aging test is carried out on an engine bench by using a specific working condition according to national standard requirements, the used condition of the method is closer to the actual road working condition, and meanwhile, the catalyst aging time can be greatly shortened (the general bench aging time is below 250 hours), so that the method is the main aging method of the existing catalyst for simulating aging calibration. The main factors of catalyst failure are high-temperature failure and chemical poisoning, although the conventional rack rapid aging method simulates the application condition of the catalyst on the whole vehicle, the aging duration is calculated by referring to the exhaust temperature condition of the whole vehicle, the influence of high temperature on the catalyst is mainly considered, the influence of harmful components such as P, Ca in engine oil normally consumed when the whole vehicle runs on an actual road for a long time on the catalyst is not considered, and the influence factor of chemical poisoning is very low, so that the catalyst prepared by the method cannot completely simulate the durability of the whole vehicle.

Disclosure of Invention

The invention provides a catalyst rack rapid aging device and an aging method introducing engine oil consumption dimension, aiming at the problem that chemical poisoning is not considered in mainstream rack rapid aging. The catalyst rack rapid aging method increases the dimension of engine oil consumption on the basis of the original rack aging mode, introduces extra target engine oil amount into a rack rapid aging engine to participate in combustion, and enables chemical poisoning generated by harmful components such as P, Ca and the like generated by combustion engine oil to act on the catalyst to prepare the rapid aging catalyst which is closer to the durability of a real vehicle road, so that the normal engine oil consumption condition in the running of the real vehicle road is simulated, two failure factors of high-temperature failure and chemical poisoning act on the catalyst at the same time, and the rapid aging catalyst which is closer to the durability of the real vehicle road is prepared.

In order to solve the defects of the prior art, the invention adopts the following technical scheme: the utility model provides an introduce quick aging device of catalyst rack of machine oil consumption dimension, includes constant delivery pump, container, nozzle, engine and catalyst, still includes the machine oil bucket of reflection machine oil consumption dimension, be provided with air intake manifold and exhaust manifold on the engine, the last nozzle that is connected with of air intake manifold, the entrance connection of nozzle has compressed air and machine oil pipe, the free end of machine oil pipe stretches into the bottom of container, be provided with the constant delivery pump between container and the machine oil bucket, the one end of constant delivery pump is connected the bottom of machine oil bucket, the other end is connected the inside upper portion of container, exhaust manifold's exit end is provided with the catalyst.

A catalyst rack rapid aging method introducing engine oil consumption dimension, aging is carried out on the aging device, and the method specifically comprises the following steps:

step S1, assembling the apparatus: connecting one end of the nozzle with an air inlet manifold on an engine, connecting the other end of the nozzle with compressed air and an engine oil pipe, wherein the engine oil pipe extends into the bottom of a container, one end of a constant delivery pump is arranged at the bottom of the engine oil barrel, the other end of the constant delivery pump is arranged at the upper part inside the container, and a catalyst is arranged at the rear part of an engine exhaust manifold;

step S2, preparing the amount of consumed engine oil for the test: collecting the oil amount data consumed by the whole vehicle which is matched with the catalyst and runs for 20 kilometres on the road, preparing the same amount of engine oil as the oil amount consumed by the rapid ageing of the rack, and injecting the required engine oil into the engine oil barrel;

step S3, aging test: the engine is started, the aging circulation working condition is entered, the compressed air connected with the nozzle is opened, the constant delivery pump is started, the engine oil is pumped into the container from the oil drum at a set flow rate, the nozzle sucks and atomizes the engine oil in the container by using the negative pressure generated by the jet flow type atomization principle, the atomized engine oil is sucked into the air inlet manifold after being mixed with the air, the combustion is participated in the engine cylinder, and the normal engine oil consumption condition in the road running of the real vehicle is simulated.

Further, the flow rate of the fixed displacement pump is 0.5-15mL/min, and the set flow rate is the engine oil amount required by the step S2 divided by the aging time length.

Further, the pressure of the compressed air entering the nozzle in step S3 is 0.1 to 0.5 kPa.

Compared with the prior art, the invention has the following advantages:

aiming at the problem that chemical poisoning is not considered in mainstream rack rapid aging, the engine oil consumption dimension is increased on the basis of the original rack aging mode, extra target engine oil quantity is introduced into a rack rapid aging engine to participate in combustion, chemical poisoning generated by harmful components such as P, Ca generated by combustion engine oil is acted on a catalyst, and the rapid aging catalyst which is closer to the durability of a real vehicle road is prepared, so that the normal engine oil consumption condition in the running of the real vehicle road is simulated, two failure factors of high-temperature failure and chemical poisoning are simultaneously acted on the catalyst, and the rapid aging catalyst which is closer to the durability of the real vehicle road is prepared.

Drawings

FIG. 1 is a schematic structural diagram of a rapid aging apparatus for a catalyst stage according to the present invention.

Fig. 2 is a graph of the final 5 kilometers average emissions for road durability for catalyst B versus vehicle emissions for catalyst a using rack rapid aging.

Description of reference numerals: 1-an engine oil barrel; 2-a fixed displacement pump; 3-a container; 4-a nozzle; 5-an intake manifold; 6-an engine; 7-an exhaust manifold; 8-a catalyst; 9-engine oil pipe.

Detailed Description

The technical solution of the present invention is further described below with reference to the following embodiments and the accompanying drawings.

As shown in fig. 1, a quick aging device of catalyst rack of leading in machine oil consumption dimension, including constant delivery pump 2, container 3, nozzle 4, intake manifold 5, engine 6, exhaust manifold 7 and catalyst 8, still including the oil bucket 1 of reflection machine oil consumption dimension, be provided with intake manifold 5 and exhaust manifold 7 on the engine 6, be connected with nozzle 4 on the intake manifold 5, the entrance point of nozzle 4 is connected with compressed air and machine oil pipe 9, the free end of machine oil pipe 9 stretches into the bottom of container 3, be provided with constant delivery pump 2 between container 3 and the oil bucket 1, the one end of constant delivery pump 2 is connected the bottom of oil bucket 1, and the other end is connected the inside upper portion of container 3, the exit end of exhaust manifold 7 is provided with catalyst 8.

Example 1

A certain domestic 2.0L displacement natural suction gasoline engine project is selected as an embodiment, the emission requirement is the national Liuba emission standard, the matched catalyst size is phi 118.4 x 152.4mm/600cpsi, and the concentration of noble metal is 36g/ft³(Pt: Pd: Rh ═ 0:32:4), 2 identical catalysts were prepared with the above dimensions and concentrations, and labeled catalyst 8A and catalyst 8B, respectively.

The catalyst 8A is quickly aged on the catalyst rack quick aging device according to the following method, and the implementation steps are as follows:

step S1, material preparation: as shown in fig. 1, an engine oil tank 1, a fixed displacement pump 2, a container 3, a nozzle 4, an engine 6, a catalyst 8A, an engine oil pipe 9, and compressed air are prepared;

step S2, assembling the apparatus: as shown in fig. 1, one end of the nozzle 4 is connected with an intake manifold 5 on an engine 6, the other end is connected with compressed air and an engine oil pipe 9, the nozzle 4 is used for adjusting pressure and atomization effect, the engine oil pipe 9 extends into the bottom of a container 3, one end of a fixed displacement pump 2 is arranged at the bottom of the engine oil barrel 1, the other end is arranged at the upper part inside the container 3, and a catalyst 8A is arranged at the rear part of an engine exhaust manifold 7;

step S3, preparing the amount of consumed engine oil for the test: collecting the oil amount data consumed by 20 kilometers of finished automobile running on a road by the catalyst 8A, preparing the same amount of engine oil as the oil amount consumed by the rapid aging of the rack, and injecting the required engine oil into the engine oil barrel 1;

specifically, the oil consumption is 1 liter per ten thousand kilometers on the vehicle type, the durable mileage required by the regulations is 20 ten thousand kilometers, namely, the consumed oil amount is 20L, and all the oil is filled into the oil tank 1. The calculated time of rack fast aging (SBC) required to be completed in the project is 250 hours, the oil consumption is 1.33 mL/min, and the quantitative pump 2 is adjusted to the set flow.

Step S4, aging test: starting an engine 6, entering an aging cycle working condition specified in GB18352-2016 standard, opening compressed air connected with a nozzle 4, adjusting the pressure of the compressed air entering the nozzle 4 to be 0.3kPa, starting a constant delivery pump 2, pumping engine oil into a container 3 from an oil drum 1 at a set flow rate of 1.33 mL/min, sucking and atomizing the engine oil in the container 3 by the nozzle 4 by using negative pressure generated by a jet type atomization principle, sucking the atomized engine oil into an air inlet manifold 5 after mixing with air, participating in combustion in an engine cylinder, simulating a normal engine oil consumption condition in road running of a real vehicle, wherein the aging time is 250 hours, taking down a catalyst 8A after aging is finished, and installing the catalyst on the whole vehicle for emission test after the assembly is packaged.

The emission values of the rapidly aged catalyst 8A obtained in example 1 were compared with the actual road durable emission values.

The type I emission test was carried out according to the requirements of GB18352-2016, and the average emission values of 3 tests are shown in Table 1.

TABLE 1 average emission values for catalyst 8A for type I emission tests according to GB18352-2016

As can be seen from Table 1, the emission value of the aged catalyst 8A is lower than the national sixth b stage limit requirement specified in GB18352-2016, and meets the regulatory requirements.

Comparative example 1

The catalyst 8B is directly packaged and assembled on the whole vehicle, the durability of the road of the real vehicle with 20 kilometres is carried out in the national motor vehicle detection center according to the requirement of GB18352-2016, the durability lasts for 8 months, the I-type emission test is carried out every 1 kilometre in the durability process, and the test result is shown in Table 2.

TABLE 2 catalyst 8B A Endurance type I emission test for real-vehicle roads was carried out according to GB18352-2016

g/km	Limit value	1w	2w	3w	4w	5w	6w	7w	8w	9w	10w
												CO	0.5	0.2264	0.2111	0.2312	0.2654	0.3045	0.2574	0.2332	0.4181	0.3789	0.3876
THC	0.05	0.0184	0.0180	0.0212	0.0259	0.0233	0.0195	0.0206	0.0264	0.0261	0.0261
												NOx	0.035	0.0079	0.0124	0.0121	0.0134	0.0158	0.0146	0.0134	0.0153	0.0137	0.0137
NMHC	0.035	0.0167	0.0160	0.0192	0.0231	0.0210	0.0174	0.0186	0.0240	0.0256	0.0238
												g/km	Limit value	11w	12w	13w	14w	15w	16w	17w	18w	19w	20w
CO	0.5	0.2449	0.4089	0.2794	0.3096	0.2748	0.3655	0.2840	0.2787	0.2372	0.4026
												THC	0.05	0.0354	0.0274	0.0310	0.0319	0.0328	0.0242	0.0337	0.0325	0.0250	0.0280
NOx	0.035	0.0190	0.0176	0.0125	0.0140	0.0217	0.0215	0.0189	0.0229	0.0211	0.0199
												NMHC	0.035	0.0333	0.0250	0.0285	0.0295	0.0302	0.0208	0.0283	0.0282	0.0208	0.0239

As can be seen from Table 2, the emission value of 20 whole vehicle tests with the catalyst 8B installed is lower than the limit requirement of the national sixth B stage specified in GB18352-2016, and meets the regulatory requirement.

The average of the final 5 million (16 to 20 million) kilometer emissions values for the catalyst 8B real road durability of table 2 is taken and compared to the bench fast aging part full car emissions values made using the present application of table 1, see fig. 2.

As can be seen from FIG. 2, the emission values of the rack rapid aging part prepared by the embodiment 1 of the application and the emission values of the real vehicle in the comparative example 1 after the road is durable have different pollutants less than 10%, and the performances are equivalent.

The composition of the rapidly aged catalyst 8A obtained in example 1 was compared with that of the catalyst 8B obtained in comparative example 1, which was durable on the road, and the results of the comparison are shown in Table 3.

In order to verify the effect of the engine oil consumption on the aging of the catalyst in the rack rapid aging process, the catalysts 8A and 8B prepared by the rapid aging and the actual road aging are subjected to component analysis, and the accumulation of two types of external components, namely Ca and P in the engine oil on the catalysts is checked, which is shown in Table 3.

TABLE 3 comparison of the Ca and P deposits on the catalysts 8A and 8B in the engine oil

Comparing items	P2O5(wt％)	CaO(wt％)
			Durable part for real vehicle	6.23	0.515
Quick ageing piece of rack	5.69	0.455

As can be seen from the results of the component analysis in Table 3, P₂O₅And foreign substances in the CaO engine oil are stacked on the catalysts prepared by the two ways, so that the difference is small, and the aging degrees of the two aging modes are equivalent.

In conclusion, the dimension of engine oil consumption is increased on the basis of the traditional rapid aging of the catalyst rack, the additional target engine oil amount is introduced into the rack rapid aging engine to participate in combustion, chemical poisoning caused by harmful components such as P, Ca generated by combustion engine oil acts on the catalyst, the prepared catalyst has the same result as a road durable aging catalyst, the durable aging time is greatly shortened, and the cost is saved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the principles of the present invention are still within the protection scope of the technical solution of the present invention.