Post-processing assembly control method, post-processing assembly and vehicle

Abstract

The invention discloses a post-processing assembly control method, a post-processing assembly and a vehicle, and belongs to the technical field of vehicles. According to the post-processing assembly control method, the post-processing assembly and the vehicle, the post-processing assembly comprises the air blower and the electric heater, the working condition of the vehicle, the working condition of the engine, the working condition of the battery and the front and back pressure difference of the DPF are obtained in real time, the vehicle is charged through an external power source, and the engine is turned off; when the engine is turned off and the front-back pressure difference of the DPF obtained for the last time before the engine is turned off is larger than or equal to the first regeneration threshold value, the electric heater and the air blower are turned on so that the DPF can be regenerated, that is, sufficient electricity is provided through the external power source, then the DPF can be fully regenerated, meanwhile, the engine does not need to be started, disturbance to a user can be reduced, and the user experience is improved. Fuel oil is not needed, so that the cost is lower.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a control method for a post-treatment assembly, a post-treatment assembly, and a vehicle. Background Art

[0002] Existing exhaust gas post-treatment devices usually include a DOC (Diesel Oxidation Catalyst), a DPF (Diesel Particulate Filter), an SCR (Selective Catalytic Reduction), and an ASC (Ammonia Slip Catalyst). Through these four units, harmful pollutants such as PM and NOx in diesel engine exhaust gas can be removed to obtain clean exhaust gas, and at the same time, the exhaust noise also meets the noise regulations.

[0003] Among them, in addition to oxidizing CO (carbon monoxide), NO (nitric oxide), and HC (hydrocarbons) in the exhaust gas, the DOC can also oxidize the unburned fuel in the exhaust gas and release heat, thereby enabling the SCR to quickly ignite and promoting DPF regeneration.

[0004] However, the cost of the DOC is relatively high. Some manufacturers have begun to try to remove the DOC in the exhaust gas post-treatment device and heat the exhaust gas introduced into the DPF through an electric heater to ensure that the DPF can be regenerated and the SCR can work properly. However, the electric heater consumes a large amount of electricity. During vehicle driving, the time when the electric heater can be used is short, making it difficult to fully regenerate the DPF, which in turn easily leads to DPF blockage. Summary of the Invention

[0005] The purpose of the present invention is to provide a control method for a post-treatment assembly, a post-treatment assembly, and a vehicle, which can not only reduce the cost of the post-treatment assembly, but also enable the DPF to be fully regenerated and avoid blockage problems.

[0006] To achieve the above object, the following technical solutions are provided:

[0007] A control method for a post-treatment assembly, the post-treatment assembly includes a DPF, a blower, and an electric heater. The inlet of the DPF is respectively communicated with the exhaust port of the vehicle's engine and the outlet of the blower. The blower is used to introduce air into the DPF. The electric heater is arranged at the inlet of the DPF and is electrically connected to the vehicle's battery;

[0008] The control method for the post-treatment assembly includes the following steps:

[0009] Obtain the operating conditions of the vehicle, the operating conditions of the engine, the operating conditions of the battery, and the differential pressure before and after the DPF in real time;

[0010] When the vehicle is charged using an external power source, the engine is turned off, and the differential pressure before and after the DPF obtained in the last time before the engine is turned off is greater than or equal to the first regeneration threshold, turn on the electric heater and the blower.

[0011] As a preferred technical solution of the above post-treatment assembly control method, after the electric heater and the blower are turned on for a preset duration, turn off the electric heater and the blower.

[0012] As a preferred technical solution of the above post-treatment assembly control method, the following steps are further included:

[0013] Determine that the engine starts;

[0014] When the differential pressure before and after the DPF is greater than or equal to the first regeneration threshold and the remaining power of the battery is not less than the first preset power, turn on the electric heater.

[0015] As a preferred technical solution of the above post-treatment assembly control method, after turning on the electric heater when the differential pressure before and after the DPF is greater than or equal to the first regeneration threshold and the remaining power of the battery is not less than the first preset power, the following steps are further included:

[0016] When the differential pressure before and after the DPF is less than the first preset differential pressure or the remaining power of the battery is less than the first power threshold, turn off the electric heater; the first preset differential pressure is less than the first regeneration threshold; the first power threshold is less than the first preset power.

[0017] As a preferred technical solution of the above post-treatment assembly control method, the following steps are further included:

[0018] When the differential pressure before and after the DPF is greater than or equal to the first regeneration threshold, the remaining power of the battery is not less than the second preset power, and the vehicle is in the vehicle preset operating condition, turn on the electric heater and make the engine charge the battery; the second preset power is less than the first power threshold.

[0019] As a preferred technical solution of the above post-treatment assembly control method, after turning on the electric heater and making the engine charge the battery when the differential pressure before and after the DPF is greater than or equal to the first regeneration threshold, the remaining power of the battery is not less than the second preset power, and the vehicle is in the vehicle preset operating condition, the following steps are further included:

[0020] When the differential pressure across the DPF is less than the second preset differential pressure or the remaining power of the battery is less than the second power threshold, turn off the electric heater; the second preset differential pressure is less than the first regeneration threshold; the second power threshold is less than the second preset power.

[0021] As a preferred technical solution of the above aftertreatment assembly control method, the following steps are further included:

[0022] When the differential pressure across the DPF is greater than or equal to the second regeneration threshold, turn on the electric heater; the second regeneration threshold is greater than the first regeneration threshold.

[0023] As a preferred technical solution of the above aftertreatment assembly control method, after turning on the electric heater when the differential pressure across the DPF is greater than or equal to the second regeneration threshold, the following steps are further included:

[0024] When the engine operating condition is at the preset engine operating condition, charge the battery with the engine.

[0025] As a preferred technical solution of the above aftertreatment assembly control method, the preset engine operating condition includes a high-load operating condition; and / or,

[0026] The preset vehicle operating condition includes a long downhill operating condition; and / or,

[0027] The first preset power includes 100% full charge capacity; and / or,

[0028] The first power threshold includes 90% full charge capacity; and / or,

[0029] The second preset power includes 80% full charge capacity; and / or,

[0030] The second power threshold includes 75% full charge capacity.

[0031] As a preferred technical solution of the above aftertreatment assembly control method, when the vehicle is in a long downhill operating condition, stop fuel injection of the engine, and the engine can exhaust.

[0032] As a preferred technical solution of the above aftertreatment assembly control method, when turning on the electric heater, make the electric heater work at the rated power.

[0033] To achieve the above object, an aftertreatment assembly is further provided, including:

[0034] A DPF, a blower, and an electric heater. The inlet of the DPF is respectively communicated with the exhaust port of the vehicle's engine and the air outlet of the blower. The blower is used to introduce air into the DPF. The electric heater is arranged at the inlet of the DPF and is electrically connected to the vehicle's battery;

[0035] An information acquisition module for acquiring the vehicle's operating conditions, the engine's operating conditions, the battery's operating conditions, and the pressure difference before and after the DPF;

[0036] A control module for turning on the electric heater and the blower when the vehicle is charging using an external power source, the engine is turned off, and the pressure difference before and after the DPF is greater than or equal to the first regeneration threshold.

[0037] To achieve the above object, a vehicle is also provided, which adopts the post-treatment assembly control method described in any one of the above.

[0038] Compared with the prior art, the beneficial effects of the present invention:

[0039] The post-treatment assembly control method, post-treatment assembly, and vehicle of the present invention. The post-treatment assembly includes a blower and an electric heater. By real-time acquiring the vehicle's operating conditions, the engine's operating conditions, the battery's operating conditions, and the pressure difference before and after the DPF, and when the vehicle is charging using an external power source, the engine is turned off, and the pressure difference before and after the DPF obtained in the last time before the engine is turned off is greater than or equal to the first regeneration threshold, the electric heater and the blower are turned on to enable the DPF to be regenerated. That is to say, by providing sufficient power through the external power source, the DPF can be fully regenerated. At the same time, there is no need to start the engine, which can reduce the disturbance to the user and also does not need to use fuel, with lower costs. Description of the Drawings

[0040] Figure 1 It is a schematic structural diagram of the post-treatment assembly in an embodiment of the present invention;

[0041] Figure 2 It is a flowchart of the post-treatment assembly control method in an embodiment of the present invention.

[0042] Reference Signs:

[0043] 1, DPF; 2, blower; 3, electric heater; 4, SCR; 5, ASC; 6, mixer. Detailed Embodiments

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0046] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0048] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0050] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0051] As Figure 1 shown, this embodiment provides a post-treatment assembly and a vehicle. The vehicle includes an engine, a battery and a post-treatment assembly. The post-treatment assembly includes a DPF1, a blower 2 and an electric heater 3. The inlet of the DPF1 is respectively communicated with the exhaust port of the engine and the outlet of the blower 2. The blower 2 is used to introduce air into the DPF1. The electric heater 3 is arranged at the inlet of the DPF1, and the electric heater 3 is electrically connected to the battery.

[0052] As Figure 2 shown, this embodiment also provides a method for controlling a post-treatment assembly, including the following steps:

[0053] S1. Obtain the vehicle condition, the engine condition, the battery condition and the differential pressure before and after the DPF1 in real time;

[0054] S2. When the vehicle is charged using an external power supply, the engine is turned off, and the differential pressure before and after the DPF1 obtained in the last time before the engine is turned off is greater than or equal to the first regeneration threshold, turn on the electric heater 3 and the blower 2.

[0055] It should be noted that when obtaining the differential pressure before and after the DPF1, the engine needs to be in a starting state. Exemplarily, when the engine is started, the differential pressure before and after the DPF1 is obtained in real time, and the differential pressure before and after the DPF1 obtained in the last time before the engine is turned off is used as a reference value for comparison with the first regeneration threshold. When the vehicle is charged using an external power supply, the engine is turned off, and the differential pressure before and after the DPF1 obtained in the last time before the engine is turned off is greater than or equal to the first regeneration threshold, turn on the electric heater 3 and the blower 2 to enable the DPF1 to be regenerated.

[0056] The post-treatment assembly control method of this embodiment obtains the vehicle operating conditions, engine operating conditions, battery operating conditions, and the pressure difference before and after DPF1 in real time. When the vehicle is charging using an external power source, the engine is turned off, and the pressure difference before and after DPF1 obtained in the last time before the engine is turned off is greater than or equal to the first regeneration threshold, the electric heater 3 and the blower 2 are turned on to regenerate DPF1. That is to say, when the vehicle is charging using an external power source and DPF1 needs to be regenerated, sufficient power is provided by the external power source, so that DPF1 can be fully regenerated. At the same time, there is no need to start the engine, which can reduce the disturbance to the user and also does not need to use fuel, with lower costs.

[0057] It should be noted that the vehicle operating conditions include the vehicle being in a long downhill condition, the vehicle being in a charging condition, etc. The engine operating conditions can be determined by information such as the engine load, the engine crankshaft speed, and the engine exhaust temperature. The battery operating conditions can be determined by the state of charge of the battery, such as the remaining battery power and the parameter information during battery charging. The pressure difference before and after DPF1 can be detected by a pressure difference sensor. The methods for obtaining the vehicle operating conditions, engine operating conditions, battery operating conditions, and the pressure difference before and after DPF1 are all prior arts and will not be elaborated here.

[0058] This embodiment does not limit the methods for obtaining the vehicle operating conditions, engine operating conditions, battery operating conditions, and the pressure difference before and after DPF1, nor the types and models of the electric heater 3 and the blower 2.

[0059] Optionally, after the electric heater 3 and the blower 2 are turned on for a preset duration, the electric heater 3 and the blower 2 are turned off. Exemplarily, a timer can be set, and when the electric heater 3 and the blower 2 are turned on, the timer starts timing, and then when the timing duration of the timer is equal to the preset duration, the electric heater 3 and the blower 2 are turned off. It should be noted that the preset duration is a known value and can be determined by means such as experience or repeated experiments, which will not be limited here.

[0060] Optionally, the post-treatment assembly control method of this embodiment further includes the following steps:

[0061] Determine that the engine starts;

[0062] When the pressure difference before and after DPF1 is greater than or equal to the first regeneration threshold and the remaining battery power is not less than the first preset power, turn on the electric heater 3.

[0063] The pressure difference before and after DPF1 being greater than or equal to the first regeneration threshold indicates that the pressure difference before and after DPF1 increases and regeneration is required. However, the pressure difference before and after DPF1 at this time is not too high yet, so the remaining battery power is used as a reference condition.

[0064] When the remaining battery power is not less than the first preset power, it indicates that the remaining battery power is sufficient to support the regeneration of DPF1. Therefore, during vehicle driving, when the engine is in the starting state, when the differential pressure before and after DPF1 is greater than or equal to the first regeneration threshold and the remaining battery power is not less than the first preset power, the electric heater 3 is turned on, and then DPF1 performs active regeneration, which can avoid the problem of DPF1 clogging.

[0065] It should be noted that the first preset power is a known value, which can be determined according to experience or multiple repeated tests and is not limited herein. Exemplarily, the first preset power includes 100% full charge capacity.

[0066] Optionally, when the differential pressure before and after DPF1 is greater than or equal to the first regeneration threshold and the remaining battery power is not less than the first preset power, after turning on the electric heater 3, the following steps are further included:

[0067] When the differential pressure before and after DPF1 is less than the first preset differential pressure, the electric heater 3 is turned off; the first preset differential pressure is less than the first regeneration threshold.

[0068] When turning on the electric heater 3 to regenerate DPF1, when the differential pressure before and after DPF1 is less than the first preset differential pressure, the electric heater 3 is turned off. At this time, the differential pressure before and after DPF1 decreases, and the problem of clogging will not occur temporarily, so the electric heater 3 can be turned off to avoid excessive consumption of battery power by the electric heater 3.

[0069] As an alternative solution, when the differential pressure before and after DPF1 is greater than or equal to the first regeneration threshold and the remaining battery power is not less than the first preset power, after turning on the electric heater 3, the following steps are further included:

[0070] When the remaining battery power is less than the first power threshold, the electric heater 3 is turned off; the first power threshold is less than the first preset power.

[0071] When turning on the electric heater 3 to regenerate DPF1, when the remaining battery power is less than the first power threshold, it means that the electric heater 3 has worked for a period of time, the differential pressure before and after DPF1 decreases, and the problem of clogging will not occur temporarily, so the electric heater 3 can be turned off to avoid excessive consumption of battery power by the electric heater 3.

[0072] It should be noted that the first power threshold is a known value, which can be determined according to experience or multiple repeated tests and is not limited herein. Exemplarily, the first power threshold includes 90% full charge capacity.

[0073] Optionally, the aftertreatment assembly control method of this embodiment further includes the following steps:

[0074] When the pressure difference before and after the DPF1 is greater than or equal to the first regeneration threshold, the remaining power of the battery is not less than the second preset power, and the vehicle is in the preset vehicle condition, turn on the electric heater 3 and make the engine charge the battery; the second preset power is less than the first power threshold.

[0075] When the remaining power of the battery is not less than the second preset power, it indicates that the remaining power of the battery is not very sufficient. If the remaining power of the battery is continued to be used alone to supply power to the electric heater 3, the remaining power of the battery will be quickly consumed, affecting the performance of the vehicle.

[0076] When the vehicle is in the preset vehicle condition and the engine charges the battery, it indicates that at this time, on the premise that the power generated by the engine enables the vehicle to drive normally, there is still surplus power, and this part of the surplus power can be used to drive the generator to work, and then charge the battery, so that the power of the battery can be supplemented. When the remaining power of the battery is not less than the second preset power, the rapid consumption of the remaining power of the battery can be avoided. Exemplarily, the preset vehicle condition includes a long downhill condition.

[0077] It should be noted that the second preset power is a known value, which can be determined according to experience or repeated tests, and is not limited here. Exemplarily, the second preset power includes 80% of the full charge capacity.

[0078] Optionally, when the vehicle is in a long downhill condition, even if the engine no longer provides power, the vehicle can still continue to drive under the action of inertia, and at this time, the engine can still provide sufficient power to drive the generator to work, and then charge the battery. At this time, stop the engine from injecting fuel, and the engine can exhaust gas, which can not only ensure that the DPF1 can be regenerated, but also has the effect of energy saving. It can be understood that when the vehicle is in a long downhill condition, put the gear of the vehicle in any gear other than neutral and release the accelerator pedal, then the engine can stop injecting fuel and the engine can exhaust gas.

[0079] Optionally, after turning on the electric heater 3 and making the engine charge the battery when the pressure difference before and after the DPF1 is greater than or equal to the first regeneration threshold, the remaining power of the battery is not less than the second preset power, and the vehicle is in the preset vehicle condition, the following steps are further included:

[0080] When the pressure difference before and after the DPF1 is less than the second preset pressure difference, turn off the electric heater 3; the second preset pressure difference is less than the first regeneration threshold.

[0081] When the electric heater 3 is turned on to regenerate the DPF1, when the pressure difference before and after the DPF1 is less than the second preset pressure difference, turn off the electric heater 3. At this time, the pressure difference before and after the DPF1 decreases, and the problem of blockage will not occur temporarily, so the electric heater 3 can be turned off to avoid excessive consumption of the battery power by the electric heater 3.

[0082] As an alternative solution, when the differential pressure across the DPF1 is greater than or equal to the first regeneration threshold, the remaining battery power is not less than the second preset power, and the vehicle is in the vehicle preset working condition, after turning on the electric heater 3 and making the engine charge the battery, the following steps are further included:

[0083] When turning on the electric heater 3 to regenerate the DPF1, when the remaining battery power is less than the second power threshold, turn off the electric heater 3; the second power threshold is less than the second preset power.

[0084] When turning on the electric heater 3 to regenerate the DPF1, when the remaining battery power is less than the second power threshold, it means that the electric heater 3 has been working for a period of time, the differential pressure across the DPF1 has decreased, and there will be no blockage problem temporarily. Then the electric heater 3 can be turned off, thereby avoiding excessive consumption of the battery power by the electric heater 3.

[0085] It should be noted that the second power threshold is a known value, which can be determined according to experience or multiple repeated tests and is not limited herein. Exemplarily, the second power threshold includes 75% of the full charge capacity.

[0086] Optionally, the aftertreatment assembly control method of this embodiment further includes the following steps:

[0087] When the differential pressure across the DPF1 is greater than or equal to the second regeneration threshold, turn on the electric heater 3; the second regeneration threshold is greater than the first regeneration threshold.

[0088] When the differential pressure across the DPF1 is greater than or equal to the second regeneration threshold, it indicates that the differential pressure across the DPF1 has further increased. If the DPF1 is not regenerated again, there will be a blockage problem. Therefore, at this time, other conditions are no longer considered, and the electric heater 3 is directly turned on to regenerate the DPF1, thereby ensuring that the DPF1 will not be blocked.

[0089] Optionally, after turning on the electric heater 3 when the differential pressure across the DPF1 is greater than or equal to the second regeneration threshold, the following steps are further included:

[0090] When the engine working condition is in the engine preset working condition, make the engine charge the battery.

[0091] When the engine working condition is in the engine preset working condition, making the engine charge the battery indicates that the power generated by the engine is sufficient at this time. A part of the power can be used to drive the generator to work to charge the battery, so that the battery power is replenished, and then a part of the power can be reserved for the DPF1 regeneration, which is beneficial to avoiding blockage of the DPF1. Exemplarily, the engine preset working condition includes a high load working condition.

[0092] Optionally, when the electric heater 3 is turned on, the electric heater 3 operates at its rated power, thereby ensuring that the electric heater 3 can provide sufficient heat for the DPF1 to perform regeneration and guaranteeing the efficiency of DPF1 regeneration.

[0093] Optionally, the aftertreatment assembly further includes an SCR 4 and an ASC 5. The DPF 1, SCR 4, and ASC 5 are connected in sequence along the exhaust gas flow direction. That is to say, the aftertreatment assembly of this embodiment does not need to be provided with a DOC, and it can still ensure that the DPF 1, SCR 4, and ASC 5 can all operate normally, thereby significantly reducing the cost of the aftertreatment assembly.

[0094] Optionally, there are two SCRs 4, and the two SCRs 4 are connected in series, thereby improving the ability of the aftertreatment assembly to reduce nitrogen oxides, enabling it to adapt to higher engine raw emissions and enhancing the exhaust gas purification effect.

[0095] Optionally, the aftertreatment assembly further includes a mixer 6. The mixer 6 includes a first mixing inlet connected to the DPF 1, a second mixing inlet for connecting to a urea supply device, and a mixing outlet connected to the inlet of the SCR 4. Through the mixer 6, the exhaust gas is mixed with ammonia (NH 3 ) formed by the hydrolysis of the urea solution, and the mixing uniformity and mixing efficiency of the exhaust gas and ammonia are improved, which is beneficial to improving the conversion rate of NOx by the SCR 4, and further enhancing the exhaust gas purification effect of the aftertreatment assembly.

[0096] Optionally, the mixing inlet and the mixing outlet are located on the same side of the mixer 6, thereby making the overall aftertreatment assembly in a U-shaped structure, which can reduce the space occupied by the aftertreatment assembly and facilitate the layout of the whole vehicle.

[0097] The aftertreatment assembly of this embodiment can execute the aftertreatment assembly control method as described above. Specifically, the aftertreatment assembly further includes an information acquisition module and a control module. The information acquisition module is used to acquire the vehicle condition, engine condition, battery condition, and the differential pressure before and after the DPF 1; the control module is used to turn on the electric heater 3 and the blower 2 when the vehicle is charging using an external power supply, the engine is turned off, and the differential pressure before and after the DPF 1 is greater than or equal to the first regeneration threshold.

[0098] The vehicle of this embodiment adopts the aftertreatment assembly control method as described above. Specifically, the vehicle of this embodiment includes the aftertreatment assembly as described above.

[0099] The aftertreatment assembly and vehicle of this embodiment have the same functions and beneficial effects as the above-mentioned aftertreatment assembly control method, and will not be elaborated here.

[0100] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A post-processing assembly control method, characterized in that: The post-treatment assembly includes a DPF, a blower and an electric heater, wherein the inlet of the DPF is respectively connected to the exhaust port of the engine of the vehicle and the air outlet of the blower, the blower is used to introduce air into the DPF, the electric heater is arranged at the inlet of the DPF, and the electric heater is electrically connected to the battery of the vehicle; The post-processing assembly control method comprises the following steps: Acquire the vehicle operating condition, the engine operating condition, the battery operating condition and the front and rear pressure difference of the DPF in real time; When the vehicle is charged using an external power supply, the engine is turned off, and the front-rear pressure difference of the DPF obtained last time before the engine is turned off is greater than or equal to a first regeneration threshold, the electric heater and the blower are turned on.

2. The post-processing assembly control method according to claim 1, characterized in that: After the electric heater and the blower are turned on for a preset time, the electric heater and the blower are turned off.

3. The post-processing assembly control method according to claim 1, characterized in that: The following steps are also included: determining that the engine is started; When the pressure difference before and after the DPF is greater than or equal to a first regeneration threshold, and the remaining power of the battery is not less than a first preset power, the electric heater is turned on.

4. The post-processing assembly control method according to claim 3, characterized in that: When the pressure difference between the front and rear of the DPF is greater than or equal to a first regeneration threshold, and the remaining power of the battery is not less than a first preset power, after turning on the electric heater, the method further includes the following steps: When the pressure difference before and after the DPF is less than a first preset pressure difference or the remaining power of the battery is less than a first power threshold, turning off the electric heater; the first preset pressure difference is less than the first regeneration threshold; The first power threshold is less than the first preset power.

5. The post-processing assembly control method according to claim 4, characterized in that: The following steps are also included: When the pressure difference before and after the DPF is greater than or equal to a first regeneration threshold, the remaining power of the battery is not less than a second preset power, and the vehicle is in a preset vehicle operating condition, the electric heater is turned on and the engine is used to charge the battery; the second preset power is less than the first power threshold.

6. The post-processing assembly control method according to claim 5, characterized in that: When the pressure difference before and after the DPF is greater than or equal to the first regeneration threshold, the remaining power of the battery is not less than the second preset power, and the vehicle is in a preset vehicle operating condition, after the electric heater is turned on and the engine is used to charge the battery, the following steps are also included: When the pressure difference before and after the DPF is less than a second preset pressure difference or the remaining power of the battery is less than a second power threshold, turning off the electric heater; the second preset pressure difference is less than the first regeneration threshold; The second power threshold is less than the second preset power.

7. The post-processing assembly control method according to claim 6, characterized in that: The following steps are also included: When the pressure difference before and after the DPF is greater than or equal to a second regeneration threshold, the electric heater is turned on; the second regeneration threshold is greater than the first regeneration threshold.

8. The post-processing assembly control method according to claim 7, characterized in that: When the pressure difference between the front and rear of the DPF is greater than or equal to the second regeneration threshold, after turning on the electric heater, the method further includes the following steps: When the operating condition of the engine is in a preset engine operating condition, the engine is enabled to charge the battery.

9. The post-processing assembly control method according to claim 8, characterized in that: The preset engine operating condition includes a high load operating condition; and / or, The preset vehicle operating condition includes a long downhill operating condition; and / or, The first preset power level includes 100% full charge capacity; and / or, The first power threshold comprises 90% of full power capacity; and / or, The second preset power includes 80% of full power capacity; and / or, The second charge threshold includes 75% of full charge capacity.

10. The post-processing assembly control method according to claim 9, characterized in that: When the vehicle is in a long downhill condition, the engine is stopped from injecting fuel and is able to exhaust gas.

11. The post-processing assembly control method according to any one of claims 1 to 10, characterized in that: When the electric heater is turned on, the electric heater is operated at rated power.

12. The post-processing assembly is characterized in that: include: A DPF, a blower and an electric heater, wherein the inlet of the DPF is respectively connected to the exhaust port of the engine of the vehicle and the air outlet of the blower, the blower is used to introduce air into the DPF, the electric heater is arranged at the inlet of the DPF, and the electric heater is electrically connected to the battery of the vehicle; An information acquisition module, used to acquire the operating condition of the vehicle, the operating condition of the engine, the operating condition of the battery and the front-rear pressure difference of the DPF; A control module is used to turn on the electric heater and the blower when the vehicle is charged using an external power supply, the engine is turned off, and the pressure difference between the front and rear of the DPF is greater than or equal to a first regeneration threshold.

13. A vehicle, characterized in that A post-processing assembly control method as described in any one of claims 1 to 11 is adopted.

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