阅读说明：本技术 一种颗粒捕集器累碳装置及颗粒捕集器快速精确累碳方法 (Particle trap carbon accumulation device and particle trap fast and accurate carbon accumulation method ) 是由 徐宁宁 闫涛 张文韬 刘泽华 王艳龙 冯朋朋 于 2021-08-25 设计创作，主要内容包括：本发明属于车辆工程技术领域,公开了一种颗粒捕集器累碳装置及颗粒捕集器快速精确累碳方法,该颗粒捕集器累碳装置包括发动机、两个排气管、两个颗粒捕集器和两个颗粒测量仪,一个排气管连通发动机的一部分缸,另一个排气管连通发动机的另一部分缸,两个排气管连通的缸数量相同,两个颗粒捕集器分别连接于两个排气管,两个颗粒测量仪分别连接于两个排气管,颗粒测量仪位于发动机与颗粒捕集器之间。该颗粒捕集器累碳装置能够快速对颗粒捕集器进行累碳,且能精确控制颗粒捕集器中积累的碳烟颗粒的质量。(The invention belongs to the technical field of vehicle engineering and discloses a particle trap carbon accumulating device and a particle trap fast and accurate carbon accumulating method. This particle trap carbon accumulating device can accumulate carbon to particle trap fast, and can the quality of the soot granule of accumulation in the accurate control particle trap.)

1. A particle trap carbon accumulating apparatus, comprising:

an engine (1);

the two exhaust pipes (2), one exhaust pipe (2) is communicated with one part of cylinders of the engine (1), the other exhaust pipe (2) is communicated with the other part of cylinders of the engine (1), and the number of communicated cylinders of the two exhaust pipes (2) is the same;

two particle traps (3), wherein the two particle traps (3) are respectively connected with the two exhaust pipes (2);

the particle measuring device comprises two particle measuring instruments (4), the two particle measuring instruments (4) are respectively connected to the two exhaust pipes (2), and the particle measuring instruments (4) are located between the engine (1) and the particle catcher (3).

2. The particle trap carbon accumulating device according to claim 1, further comprising an electric dynamometer (5), wherein the electric dynamometer (5) is in transmission connection with the engine (1).

3. The particle trap carbon accumulating device according to claim 2, further comprising a controller (6), wherein the controller (6) is electrically connected with the electric dynamometer (5).

4. The particulate trap carbon accumulating device according to claim 1, further comprising an oil injection controller (7), wherein the oil injection controller (7) is electrically connected with an oil injector (11) of the engine (1).

5. The particulate trap carbon accumulating device according to claim 1, wherein the engine (1) employs a V-type 6 cylinder direct injection gasoline engine.

6. A method for quickly and accurately accumulating carbon in a particle trap, which is characterized in that the carbon accumulating device of the particle trap as claimed in any one of claims 1 to 5 is adopted, and comprises the following steps:

s1: the engine (1) runs for a set time under a first working condition of a first rotating speed and 100% load;

s2: disassembling the particle catcher (3) and collecting and weighing soot particles in the particle catcher (3) to obtain the actual carbon loading capacity; the mass of the carbon smoke particles measured by the particle measuring instrument (4) is the measured carbon loading;

s3: the engine (1) is operated for a set time under a second working condition of a second rotating speed and 100% load, and S2 is carried out;

s4: the engine (1) is operated for a set time under a third working condition of a third rotating speed and 100% load, and S2 is carried out;

s5: establishing an actual carbon loading-measured carbon loading coordinate system, and drawing a first point, a second point and a third point on the actual carbon loading-measured carbon loading coordinate system according to the actual carbon loading and the measured carbon loading obtained under the first working condition, the second working condition and the third working condition;

s6: fitting a straight line according to the first point, the second point and the third point;

s7: the correction coefficient MSS is the reciprocal of the slope of the straight line, and the correction coefficient MSS is obtained through the straight line;

s8: calculating a target time T required for loading a target carbon loading M1 in the particle trap (3) according to the formulas T-M1 × MSS/0.001+ Δ T and Δ T-M1/0.05 + 100;

in the formula: m1 is the target carbon loading; t is a target time; MSS is a correction factor; Δ T is the load compensation time;

s9: and when the engine (1) runs for the target time T under the working conditions of 3000r/min rotating speed and 100% load, the carbon loading in the two particle traps (3) are both the target carbon loading M1.

7. The method for rapidly and accurately accumulating carbon in the particle trap as claimed in claim 6, wherein in step S9, the engine (1) is operated for a certain time under the condition of 3000r/min and 100% load, and when the mass of the particles measured by the particle measuring instrument (4) reaches over 1000ug/S, the particle trap (3) is mounted on the exhaust pipe (2) and the engine (1) is driven to operate for a target time T.

8. The method for rapid and accurate carbon buildup for a particle trap according to claim 6, characterized in that the engine (1) is operated in the first, second and third operating conditions, ensuring that the internal stability of the particle trap (3) does not exceed 800 ℃.

9. The method for quickly and accurately accumulating carbon in the particle trap according to claim 6, wherein the device for accumulating carbon in the particle trap (3) further comprises an oil injection controller (7), and the oil injection controller (7) controls the oil injection quantity, the oil injection time and the oil injection pressure of an oil injector (11) of the engine (1).

10. The method of claim 6, wherein the first rotational speed is 1500r/min, the second rotational speed is 3000r/min, and the third rotational speed is 4500 r/min.

Technical Field

The invention relates to the technical field of vehicle engineering, in particular to a particle trap carbon accumulating device and a particle trap carbon accumulating method.

Background

Along with the improvement of living standard of people, the use amount of automobiles is more and more, and along with the emission of a large amount of automobile pollutants, the automobile pollutants can cause environmental deterioration. The installation of a Particle trap (GPF gas Particle Filter) on an automobile is an effective means for reducing the emission of particulate matters in the exhaust of the automobile. Particulate traps are typically installed in the exhaust pipe of automobiles, and when exhaust gas with a large amount of soot passes through the particulate trap, the particular internal structure of the particulate trap continuously traps the soot, thereby reducing the soot content in the exhaust gas.

Automobile companies, whole car factories, GPF suppliers, etc. will perform research and test on the influence of soot particles on the particle trap to improve and optimize the particle trap, so that the particle trap can operate more effectively, stably and for a long time. Carbon is tired to particulate trap usually need carry out when experimental, however present particulate trap tired carbon device all is that an engine passes through blast pipe and connects a particulate trap, the engine operation once can only be tired carbon to a particulate trap, and is slow in speed, and is inefficient, and because there is the error in actual carbon loading capacity in particulate mass and the particulate trap that the particle measurement appearance measured, unable accurate control is the soot particle mass of accumulation in the particulate trap, need dismouting particulate trap repeatedly, the soot particle in the particulate trap is collected and is weighed, can obtain the quality of soot particle in the particulate trap, waste time and energy.

Accordingly, there is a need for a particulate trap carbon accumulation apparatus or method that can quickly accumulate carbon in a particulate trap and can precisely control the mass of soot accumulated by the particulate trap.

Disclosure of Invention

The invention aims to provide a carbon accumulating device of a particle trap and a method for quickly and accurately accumulating carbon of the particle trap, which can quickly accumulate carbon for the particle trap and accurately control the quality of soot particles accumulated in the particle trap.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a carbon accumulating device of a particle trap, which comprises:

an engine;

one exhaust pipe is communicated with one part of cylinders of the engine, the other exhaust pipe is communicated with the other part of cylinders of the engine, and the number of communicated cylinders of the two exhaust pipes is the same;

the two particle traps are respectively connected with the two exhaust pipes;

the two particle measuring instruments are respectively connected to the two exhaust pipes, and the particle measuring instruments are located between the engine and the particle catcher.

As a preferable scheme of the particle trap carbon accumulating device, the particle trap carbon accumulating device further comprises an electric dynamometer, and the electric dynamometer is in transmission connection with the engine.

The particle trap carbon accumulating device further comprises a controller, and the controller is electrically connected with the electric dynamometer.

The fuel injection controller is electrically connected with a fuel injector of the engine.

As a preferable scheme of the particle trap carbon accumulating device, the engine adopts a V-shaped 6-cylinder direct injection gasoline engine.

The invention also provides a method for quickly and accurately accumulating carbon in the particle catcher, which adopts the carbon accumulating device of the particle catcher and comprises the following steps:

s1: the engine runs for a set time under a first working condition of a first rotating speed and 100% load;

s2: disassembling the particle catcher and collecting and weighing soot particles in the particle catcher to obtain the actual carbon loading capacity; the mass of the carbon smoke particles measured by the particle measuring instrument is the measured carbon loading capacity;

s3: the engine is operated for a set time under a second working condition of a second rotating speed and 100% load, and S2 is carried out;

s4: the engine is operated for a set time under a third working condition of a third rotating speed and 100% load, and S2 is carried out;

s5: establishing an actual carbon loading-measured carbon loading coordinate system, and drawing a first point, a second point and a third point on the actual carbon loading-measured carbon loading coordinate system according to the actual carbon loading and the measured carbon loading obtained under the first working condition, the second working condition and the third working condition;

s6: fitting a straight line according to the first point, the second point and the third point;

s7: the correction coefficient MSS is the reciprocal of the slope of the straight line, and the correction coefficient MSS is obtained through the straight line;

s8: calculating the target time T required by loading the target carbon load M1 in the particle catcher according to the formulas T-M1 × MSS/0.001+ delta T and delta T-M1/0.05 + 100;

in the formula: m1 is the target carbon loading; t is a target time; MSS is a correction factor; Δ T is the load compensation time;

s9: and when the engine runs for the target time T under the working condition of rotating speed of 3000r/min and 100% load, the carbon loading capacity of the two particle traps is the target carbon loading capacity M1.

As a preferable scheme of the method for rapidly and accurately accumulating carbon in the particle trap, in S9, the engine is operated for a certain time under the working condition of 3000r/min and 100% load, and when the mass of particles measured by the particle measuring instrument reaches over 1000ug/S, the particle trap is mounted on the exhaust pipe, and the engine is driven to operate for a target time T.

As a preferable scheme of the method for quickly and accurately accumulating carbon in the particle trap, when the engine operates under the first operating condition, the second operating condition and the third operating condition, the internal stability of the particle trap is ensured to be not more than 800 ℃.

As a preferable scheme of the method for quickly and accurately accumulating carbon in the particle trap, the carbon accumulating device of the particle trap further comprises an oil injection controller, and the oil injection controller controls the oil injection quantity, the oil injection time and the oil injection pressure of an oil injector of the engine.

As a preferable scheme of the method for quickly and accurately accumulating carbon in the particle catcher, the first rotating speed is 1500r/min, the second rotating speed is 3000r/min, and the third rotating speed is 4500 r/min.

The invention has the beneficial effects that: the invention provides a particle trap carbon accumulation device and a particle trap fast and accurate carbon accumulation method. In the particle trap carbon accumulation device, one engine is connected with two particle traps through two exhaust pipes, the engine operates once and can accumulate carbon for the two particle traps, and the carbon accumulation efficiency is high. And in the method for quickly and accurately accumulating carbon in the particle trap, a correction coefficient is obtained according to the actual carbon loading capacity of the particle trap and the measured carbon loading capacity measured by the particle measuring instrument, which are obtained by the particle trap carbon accumulating device under the first working condition, the second working condition and the third working condition, the target time required by loading the target carbon loading capacity is calculated according to the correction coefficient, and finally, the quality of the soot particles accumulated in the particle trap can be accurately controlled by loading the target time on the particle trap in the particle trap carbon accumulating device.

Drawings

FIG. 1 is a schematic diagram of a carbon accumulation device of a particle trap according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an actual carbon loading-measured carbon loading coordinate system in a method for rapidly and accurately accumulating carbon in a particle trap according to an embodiment of the present invention.

In the figure:

1. an engine; 2. an exhaust pipe; 3. a particle trap; 4. a particle measuring instrument; 5. an electric dynamometer; 6. a controller; 7. an oil injection controller; 11. and a fuel injector.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Present particle trap carbon accumulation device is that an engine passes through blast pipe and connects a particle trap, the engine operation once can only accumulate carbon to a particle trap, and is slow, and is inefficient, and because there is the error in the actual carbon loading capacity in the particle mass that the particle measurement appearance surveyed and the particle trap, unable accurate control the soot particle mass of accumulation in the particle trap, need dismouting particle trap repeatedly, soot particle in the particle trap is collected and is weighed, can obtain the quality of soot particle in the particle trap, waste time and energy.

The invention provides a particle trap carbon accumulating device and a particle trap fast and accurate carbon accumulating method, wherein one engine in the particle trap carbon accumulating device is connected with two particle traps through two exhaust pipes, the two particle traps can be accumulated with carbon by the operation of the engine once, and the carbon accumulating efficiency is high; according to the method for quickly and accurately accumulating carbon in the particle trap, a correction coefficient is obtained according to the actual carbon loading capacity of the particle trap and the measured carbon loading capacity measured by the particle measuring instrument, which are obtained by the particle trap carbon accumulating device under the first working condition, the second working condition and the third working condition, the target time required by loading the target carbon loading capacity is calculated according to the correction coefficient, and finally, the quality of the soot particles accumulated in the particle trap can be accurately controlled by loading the target time on the particle trap in the particle trap carbon accumulating device.

Example 1

The embodiment provides a particle trap carbon accumulation device, as shown in fig. 1, the particle trap carbon accumulation device includes an engine 1, two exhaust pipes 2, two particle traps 3 and two particle measuring instruments 4, one exhaust pipe communicates with a part of cylinders of the engine, the other exhaust pipe communicates with the other part of cylinders of the engine, the two particle traps 3 are respectively connected to the two exhaust pipes 2, the number of cylinders communicated by the two exhaust pipes 2 is the same, the two particle measuring instruments 4 are respectively connected to the two exhaust pipes 2, and the particle measuring instruments 4 are located between the engine 1 and the particle traps 3. The engine 1 can accumulate carbon for two particle traps 3 simultaneously when running once, can accelerate carbon accumulation speed, and is efficient. The particle meter 4 can measure the soot mass passing through the exhaust pipe 2, but the soot mass measured by the particle meter 4 has some error from the actual carbon load in the particle trap 3. According to the actual carbon loading in the particle trap 3 obtained by operating the particle trap carbon accumulation device under the first working condition, the second working condition and the third working condition and the measured carbon loading measured by the particle measuring instrument 4, fitting to obtain a correction coefficient, and after learning the correction coefficient, calculating the target time required by the particle trap carbon accumulation device for loading the target carbon loading on the particle trap 3, wherein the target time for loading the particle trap 3 by the particle trap carbon accumulation device can accurately load the target carbon loading on the particle trap 3.

Alternatively, the engine 1 in the present embodiment employs a V-type 6-cylinder direct injection gasoline engine. An exhaust pipe 2 communicates with 3 cylinders located on one side of the engine 1, and the exhaust pipe 2 is conveniently connected with the engine 1.

Optionally, an electric dynamometer 5 is further included, and the electric dynamometer 5 is in transmission connection with the engine 1. The electric dynamometer 5 is connected with the output shaft of the engine 1 to assist the rotation of the output shaft of the engine 1, and the electric dynamometer 5 has high response speed, so that the carbon accumulation speed of the particle catcher 3 is improved. Optionally, the particle trap 3 carbon accumulation device further comprises a controller 6, and the controller 6 is electrically connected with the electric dynamometer 5. The controller 6 controls the rotation speed of the engine 1 by controlling the rotation speed of the electric dynamometer 5, so that the engine 1 can be operated at different rotation speeds.

Optionally, an oil injection controller 7 is further included, and the oil injection controller 7 is electrically connected with an oil injector 11 of the engine 1. The oil injection controller 7 can control the oil injection quantity, the oil injection time and the oil injection pressure of an oil injector 11 of the engine 1, and the oil injection controller 7 controls the larger the oil injection quantity, the longer the oil injection time and the smaller the oil injection pressure, the more soot is generated by the engine 1, so that the carbon accumulation speed of the particulate trap 3 is further improved.

Example 2

The embodiment provides a method for quickly and accurately accumulating carbon in a particle trap, which adopts the carbon accumulating device for a particle trap, and comprises the following steps:

s1: the engine 1 is operated at a first speed, 100% load for a set time.

S2: disassembling the particle catcher 3, and collecting and weighing soot particles in the particle catcher 3 to obtain the actual carbon loading capacity; the mass of soot particles measured by particle meter 4 is a measure of carbon loading.

S3: the engine 1 is operated at the second operating condition of 100% load at the second rotation speed for the set time, and S2 is performed.

S4: the engine 1 is operated at the third operating condition of the third rotation speed and 100% load for the set time, and S2 is performed.

S5: and establishing an actual carbon loading-measured carbon loading coordinate system, and drawing a first point, a second point and a third point on the actual carbon loading-measured carbon loading coordinate system according to the actual carbon loading and the measured carbon loading obtained under the first working condition, the second working condition and the third working condition.

S6: and fitting a straight line according to the first point, the second point and the third point.

S7: the correction coefficient MSS is the reciprocal of the slope of the straight line, and the correction coefficient MSS is obtained through the straight line;

s8: the target time T required for loading the target carbon load in the particle trap 3 can be calculated according to the following formulae T-M1 × MSS/0.001+ Δ T and Δ T-M1/0.05 + 100;

in the formula: m1 is the target carbon loading; t is a target time; MSS is a correction factor; Δ T is the load compensation time.

S9: when the engine 1 is operated for the target time T under the working condition of 3000r/min rotating speed and 100% load, the carbon loading in the two particulate traps 3 are both the target carbon loading M1.

The first rotation speed is a low rotation speed, the second rotation speed is a medium rotation speed, and the third rotation speed is a high rotation speed, preferably, the first rotation speed is 1500r/min, the second rotation speed is 3000r/min, and the third rotation speed is 4500 r/min. So as to ensure that the actual carbon loading obtained according to the operation under the three working conditions and the correction coefficient finally obtained by measuring and measuring the carbon loading are more accurate.

As shown in fig. 2, an actual carbon loading-measured carbon loading coordinate system is established, and a first point, a second point and a third point are respectively drawn on the actual carbon loading-measured carbon loading coordinate system according to the actual carbon loading and the measured carbon loading obtained under the first working condition, the second working condition and the third working condition; fitting a straight line according to the first point, the second point and the third point; the following relationships exist for actual carbon loading, measured carbon loading, target time, engine exhaust density, and engine exhaust mass flow:

in the formula: m is the actual carbon loading of the particle trap 3 as weighed; c is the measured carbon loading measured by the particle measuring instrument 4; m_exhIs the engine exhaust mass flow; t is a target time; rho is engine exhaust density; MSS is a correction factor.

For fixed conditions, fixed time loading, M_exhT and rho are constants. It can be seen that the correction factor MSS is the inverse of the slope of the line. Whereby the correction coefficient MSS can be obtained from the straight line.

After the MSS is obtained, the target time required to load the target carbon load may be calculated according to the following formula.

T＝M1×MSS/0.001+ΔT

ΔT＝M1/0.05+100

In the formula: m1 is the target carbon loading; t is a target time; MSS is a correction factor; Δ T is the load compensation time.

After the target time T required for loading the target carbon loading M1 is obtained, the engine 1 operates for the target time T under the working condition of rotating speed of 3000r/min and 100% load, and the carbon loading in the two particulate traps 3 are both the target carbon loading M1. The method for quickly and accurately accumulating carbon in the particle catcher 3 can accurately control the carbon loading of the particle catcher 3.

The specific steps of operating the particle trap carbon accumulation device in S1, S3, S4 and S9 are as follows: firstly warming up the engine 1, then operating the carbon cleaning working condition of the DPF, then starting to calculate the loading time, operating the working condition of the cold machine of the engine 1 after the required operation time of the engine 1, finally stopping the engine 1, and removing the DPF to weigh the soot particles.

Optionally, in S9, the engine 1 is operated at 3000r/min and 100% load for a certain time, and when the mass of the particles measured by the particle measuring instrument 4 reaches 1000ug/S or more, the particle trap 3 is mounted on the exhaust pipe 2, and the engine 1 is driven to operate for the target time T. After the particle mass measured by the particle measuring instrument 4 reaches more than 1000ug/s, the engine 1 is already in stable operation, and the carbon loading on the particle catcher 3 can be ensured to be more accurate.

Optionally, when the engine 1 operates under the first operating condition, the second operating condition and the third operating condition, it is ensured that the internal stability of the particulate trap 3 does not exceed 800 ℃, so as to ensure that the obtained correction coefficient is more accurate.

Optionally, the carbon accumulating device of the particulate trap 3 further comprises an oil injection controller 7, and the oil injection controller 7 controls the oil injection quantity, the oil injection time and the oil injection pressure of an oil injector 11 of the engine 1. The larger the fuel injection quantity, the longer the fuel injection time and the smaller the fuel injection pressure are controlled by the fuel injection controller 7, the more soot is generated by the engine 1, and thus the carbon accumulation speed of the particulate trap 3 is further accelerated. In S1, S3, S4, and S9, the fuel injection controller 7 controls the fuel injection amount, the fuel injection timing, and the fuel injection pressure of the fuel injectors 11 of the engine 1 to be the same, to ensure that an accurate carbon load is obtained.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.