CN114810384B - Method and device for controlling post-treatment inlet temperature - Google Patents
Method and device for controlling post-treatment inlet temperature Download PDFInfo
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- CN114810384B CN114810384B CN202210505430.3A CN202210505430A CN114810384B CN 114810384 B CN114810384 B CN 114810384B CN 202210505430 A CN202210505430 A CN 202210505430A CN 114810384 B CN114810384 B CN 114810384B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
- F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
Abstract
The application provides a control method and device for an after-treatment inlet temperature. The control method comprises the following steps: acquiring the current rotating speed, the current torque and the target torque of an engine; determining target parameters of the aftertreatment heating system according to the current rotating speed, the current torque and the target torque, wherein the target parameters comprise at least one of the following: target post-injection quantity of the engine and target opening angle of the exhaust valve; the target parameter is adjusted such that the temperature of the aftertreatment inlet reaches the target temperature. According to the method, the target post-injection quantity and/or the target opening angle required when the post-treatment inlet temperature reaches the required temperature are determined, and then the current post-injection quantity of the engine is increased to the target post-injection quantity and/or the current opening angle of the exhaust valve is increased to the target opening angle, so that the current temperature of the post-treatment inlet is increased to the target temperature, and the problem of low accuracy of increasing the post-treatment inlet temperature to the required temperature in the prior art is solved.
Description
Technical Field
The present application relates to the field of engine technologies, and in particular, to a method and apparatus for controlling an aftertreatment inlet temperature, a computer readable storage medium, and a processor.
Background
The aftertreatment system of a turbocharged diesel engine operates in a specific temperature interval, and the conversion efficiency of the aftertreatment is then increased by increasing the temperature of the process inlet gas, as shown in fig. 1. When the gas temperature is too low, the post-treatment efficiency is low, and the indexes of emission pollutants such as nitrogen oxides, carbon particles and the like at the post-treatment outlet do not meet the emission regulation requirements. In order to meet emission regulation requirements, the aftertreatment conversion efficiency needs to be above a certain limit, i.e. the exhaust temperature needs to be above a certain limit. Typically this limit is above 270 ℃.
The existing diesel engine fuel injection process usually adopts a multi-stage injection strategy, namely, fuel is injected into a cylinder in one fuel injection cycle in a plurality of times at intervals. Depending on the timing of the injection, the multi-stage injection is generally divided into three stages, i.e., pre-injection, main injection, and post-injection, as shown in fig. 2. The pre-spraying is used for increasing the temperature in the cylinder and accelerating the ignition of fuel; the main fuel oil is used for doing work; post-injection fuel is typically used to raise the exhaust temperature of the engine. Because the post-injection fuel has weaker function, the increase of the post-injection fuel quantity can lead to the deterioration of the fuel consumption of the diesel engine, so the post-injection fuel quantity should be reduced as much as possible.
When the diesel engine runs under low load, the fuel flow is smaller and the gas quantity is excessive, so that the temperature of the engine exhaust is lower, the energy in the exhaust is converted into the turbine mechanical work after the low-temperature exhaust works through the turbocharger, and the temperature of the exhaust at the outlet of the turbine, namely the inlet of the aftertreatment system, is further reduced compared with the temperature of the exhaust at the outlet of the cylinder. The post-treatment inlet temperature may be below 270 ℃ and the emissions may not meet regulatory requirements. To raise the aftertreatment inlet temperature, existing diesel engines typically raise the exhaust temperature by increasing the amount of post-injection fuel, a mode known as the heating mode of the diesel engine, and this control method raises the exhaust temperature at the expense of fuel consumption. This is because the heat generated by the increase in post-injection amount is largely converted into turbine work and absorbed by the increased air, and only a small portion of the heat is used to heat the post-treatment inlet exhaust gas temperature, which has a limited effect on the increase in post-treatment inlet temperature and significantly increases diesel fuel consumption. In the prior art, a branch is added from an exhaust port to an after-treatment inlet, and an exhaust valve is arranged on the branch to control part of high-temperature exhaust gas of an engine to directly enter the after-treatment inlet without passing through a turbine, so that the temperature of the after-treatment inlet is increased. However, in the prior art, the post-treatment inlet temperature is directly obtained to adjust the post-injection quantity and/or the opening angle, so that the temperature cannot be accurately increased to the required temperature.
Therefore, a method for accurately raising the post-treatment inlet temperature to the desired temperature is needed.
The above information disclosed in the background section is only for enhancement of understanding of the background art from the technology described herein and, therefore, may contain some information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.
Disclosure of Invention
The main objective of the present application is to provide a method, an apparatus, a computer readable storage medium and a processor for controlling a post-processing inlet temperature, so as to solve the problem of low accuracy in improving the post-processing inlet temperature to a required temperature in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a control method of an aftertreatment inlet temperature applied to an aftertreatment inlet of an aftertreatment heating system including an engine, a turbine, and an exhaust valve, the engine and the turbine being connected by an exhaust pipe, the exhaust inlet of the engine being connected to an exhaust outlet of the turbine by a bypass pipe, the exhaust outlet of the turbine being the aftertreatment inlet, the exhaust valve being provided on the bypass pipe, the control method including: acquiring the current rotating speed, the current torque and the target torque of the engine; determining a target parameter of the aftertreatment heating system based at least on the current rotational speed, the current torque, and the target torque, the target parameter comprising at least one of: the target post-injection quantity of the engine and the target opening angle of the exhaust valve; increasing a current parameter to the target parameter such that the temperature of the aftertreatment inlet is increased to a target temperature, the current parameter including at least one of: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve.
Optionally, acquiring the current rotation speed, the current torque and the target torque of the engine includes: acquiring the current rotation speed and the target torque of the engine; calculating the current opening angle of the exhaust valve and the current back oil injection quantity of the engine according to the current rotating speed and the target torque; and determining the current torque according to the current opening angle and the current back oil injection quantity.
Optionally, the target parameter includes a target post-injection amount of the engine, and determining the target parameter of the aftertreatment heating system according to the current rotation speed, the current torque and the target torque includes: determining whether a difference between the current torque and the target torque is within a first predetermined range; determining that the current post-injection quantity is the target post-injection quantity under the condition that the difference value is in the first preset range; and if the difference value is not in the first preset range, adjusting the current post-injection quantity so that the difference value is in the first preset range and the adjusted current post-injection quantity is the target post-injection quantity.
Optionally, adjusting the current post-injection amount if the difference is not in the first predetermined range includes: a first calculation step of calculating a post-injection quantity when the current torque reaches the target torque at least according to the current torque and the target torque to obtain a first post-injection quantity of the engine; a first adjustment step of adjusting the current post-injection quantity to the first post-injection quantity; and sequentially repeating the first calculation step and the first adjustment step at least once until the difference between the current torque and the target torque is within the first preset range.
Optionally, calculating a first post-injection amount of the engine based on at least the current torque and the target torque includes: acquiring a first difference value, wherein the first difference value is a torque change value when the post-injection oil quantity is increased by a first preset value; calculating the ratio of the first difference value to the first preset value to obtain a first slope; and calculating the sum of a first target ratio and the current post-injection quantity to obtain the first post-injection quantity, wherein the first target ratio is the ratio of the difference value of the target torque and the current torque to the first slope.
Optionally, the target parameter includes a target opening angle of the exhaust valve, and the target parameter of the aftertreatment heating system is determined according to the current rotation speed, the current torque and the target torque, and further includes: acquiring the current temperature of the post-treatment inlet; determining whether a difference between the current temperature and the target temperature is within a second predetermined range; determining that the current opening angle is the target opening angle under the condition that the difference value is in the second preset range; and if the difference value is not in the second preset range, adjusting the current opening angle so that the difference value is in the second preset range and the adjusted current opening angle is the target opening angle.
Optionally, adjusting the current opening angle if the difference is not in the second predetermined range includes: a second calculation step of calculating an opening angle of the exhaust valve when the current temperature reaches the target temperature according to at least the current temperature and the target temperature to obtain a first opening angle of the exhaust valve; a second adjustment step of adjusting the current opening angle to the first opening angle; and sequentially repeating the second calculation step and the second adjustment step at least once until the difference between the current temperature and the target temperature is within the second preset range.
Optionally, calculating a first opening angle of the exhaust valve according to at least the current temperature and the target temperature includes: acquiring a second difference value, wherein the second difference value is a temperature change value of the aftertreatment inlet when the opening angle of the exhaust valve is increased by a second preset value and the current torque of the engine reaches the target torque; calculating the ratio of the second difference value to the second preset value to obtain a second slope; and calculating the sum of the current temperature and the second target ratio to obtain the first open angle, wherein the second target ratio is the ratio of the difference value of the target temperature and the current temperature to the second slope.
According to another aspect of the embodiment of the present invention, there is also provided a control device for an aftertreatment inlet temperature applied to an aftertreatment inlet of an aftertreatment heating system including an engine, a turbine, an exhaust valve, the engine and the turbine being connected by an exhaust pipe, the exhaust inlet of the engine being connected to an exhaust outlet of the turbine by a bypass pipe, the exhaust outlet of the turbine being the aftertreatment inlet, the exhaust valve being provided on the bypass pipe, the control device including an acquisition unit for acquiring a current rotational speed, a current torque, and a target torque of the engine; the determining unit is configured to determine a target parameter of the aftertreatment heating system according to the current rotational speed, the current torque, and the target torque, where the target parameter includes at least one of: the target post-injection quantity of the engine and the target opening angle of the exhaust valve; the adjustment unit is used for adjusting the target parameter so that the temperature of the aftertreatment inlet reaches a target temperature.
According to another aspect of an embodiment of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program performs any one of the methods.
According to another aspect of an embodiment of the present invention, there is also provided a processor=the processor is configured to execute a program, wherein the program executes any one of the methods.
In an embodiment of the present invention, the method for controlling a temperature of an aftertreatment inlet is applied to an aftertreatment inlet of an aftertreatment heating system, the aftertreatment heating system includes an engine, a turbine, and an exhaust valve, the engine and the turbine are connected through an exhaust pipe, the exhaust inlet of the engine is connected to an exhaust outlet of the turbine through a bypass pipe, the exhaust outlet of the turbine is the aftertreatment inlet, and the exhaust valve is disposed on the bypass pipe, the method for controlling includes: acquiring the current rotating speed, the current torque and the target torque of the engine; determining a target parameter of the aftertreatment heating system based on the current rotational speed, the current torque, and the target torque, the target parameter comprising at least one of: the target post-injection quantity of the engine and the target opening angle of the exhaust valve; the target parameter is adjusted such that the temperature of the aftertreatment inlet reaches a target temperature. The method comprises the steps of determining the target post-injection oil quantity and/or the target opening angle required when the post-treatment inlet temperature reaches the required temperature, then increasing the current post-injection oil quantity of the engine to the target post-injection oil quantity and/or increasing the current opening angle of the exhaust valve to the target opening angle so as to increase the current temperature of the post-treatment inlet to the target temperature, thereby avoiding the problem that the post-treatment inlet temperature cannot be accurately increased to the required temperature due to the fact that the post-treatment inlet temperature is directly regulated by the post-treatment inlet temperature in the prior art, and further solving the problem that the accuracy of increasing the post-treatment inlet temperature to the required temperature is low.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 shows a graph of aftertreatment conversion efficiency versus aftertreatment inlet temperature in accordance with the prior art;
FIG. 2 shows a schematic diagram of a diesel engine multi-stage injection according to the prior art;
FIG. 3 illustrates a schematic diagram of an aftertreatment heating system, according to an embodiment of the present application;
FIG. 4 illustrates a flow chart of a method of controlling aftertreatment inlet temperature, according to an embodiment of the present application;
FIG. 5 illustrates a logic diagram of a method of controlling aftertreatment inlet temperature, according to an embodiment of the present application;
FIG. 6 shows a post-injection quantity calculation schematic diagram according to an embodiment of the present application;
FIG. 7 illustrates a schematic diagram of exhaust valve opening angle calculation according to an embodiment of the present application;
fig. 8 shows a schematic diagram of a control device for aftertreatment inlet temperature according to an embodiment of the present application.
Wherein the above figures include the following reference numerals:
101. an engine; 102. a turbine; 103. an exhaust valve; 104. an exhaust line; 105. a bypass line; 106. a stepper motor.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Furthermore, in the description and in the claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background art, in order to solve the above-mentioned problem, in an exemplary embodiment of the present application, a method, an apparatus, a computer readable storage medium, and a processor for controlling an aftertreatment inlet temperature are provided.
According to an embodiment of the present application, there is provided a method for controlling a post-treatment inlet temperature, which is applied to a post-treatment inlet of a post-treatment heating system, as shown in fig. 3, wherein the post-treatment heating system includes an engine 101, a turbine 102, and an exhaust valve 103, the engine 101 and the turbine 102 are connected through an exhaust pipe 104, the exhaust inlet of the engine 101 is connected to an exhaust outlet of the turbine 102 through a bypass pipe 105, the exhaust outlet of the turbine 102 is the post-treatment inlet, and the exhaust valve 103 is disposed on the bypass pipe 105.
FIG. 4 is a flow chart of a method of controlling aftertreatment inlet temperature, according to an embodiment of the present application. As shown in fig. 4, the method comprises the steps of:
step S101, obtaining the current rotating speed, the current torque and the target torque of the engine;
step S102, determining target parameters of the aftertreatment heating system at least according to the current rotating speed, the current torque and the target torque, wherein the target parameters comprise at least one of the following: the target post-injection amount of the engine and the target opening angle of the exhaust valve;
step S103, increasing the current parameters to the target parameters so that the temperature of the post-treatment inlet is increased to the target temperature, wherein the current parameters comprise at least one of the following: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve.
Firstly, acquiring the current rotating speed, the current torque and the target torque of the engine; then, determining a target parameter of the aftertreatment heating system based at least on the current rotational speed, the current torque, and the target torque, the target parameter including at least one of: the target post-injection amount of the engine and the target opening angle of the exhaust valve; finally, increasing a current parameter to the target parameter to increase the temperature of the aftertreatment inlet to the target temperature, wherein the current parameter comprises at least one of the following: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve. The method comprises the steps of determining the target post-injection oil quantity and/or the target opening angle required when the post-treatment inlet temperature reaches the required temperature, then increasing the current post-injection oil quantity of the engine to the target post-injection oil quantity and/or increasing the current opening angle of the exhaust valve to the target opening angle so as to increase the current temperature of the post-treatment inlet to the target temperature, thereby avoiding the problem that the post-treatment inlet temperature cannot be accurately increased to the required temperature due to the fact that the post-treatment inlet temperature is directly regulated by the post-treatment inlet temperature in the prior art, and further solving the problem that the accuracy of increasing the post-treatment inlet temperature to the required temperature is low.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
In order to quickly and accurately obtain the current torque of the aftertreatment heating system including the bypass, in one embodiment of the present application, obtaining the current rotational speed, the current torque, and the target torque of the engine includes: acquiring the current rotation speed and the target torque of the engine; calculating the current opening angle of the exhaust valve and the current post-injection quantity of the engine according to the current rotating speed and the target torque; and determining the current torque according to the current opening angle and the current back oil injection quantity.
Specifically, the current rotational speed of the engine may be obtained from an engine Electronic Control Unit (ECU). In addition, a semi-empirical model can be established, as shown in fig. 5, by adopting test data of similar models to establish mathematical relations among engine speed, torque, post-treatment inlet temperature, post-injection quantity and exhaust flow, and then adding a bypass pipeline flow model, namely the semi-empirical model. Substituting the current rotation speed, the target temperature and the target torque into a semi-empirical model to calculate the current opening angle and the current post-injection quantity of the exhaust valve, and transmitting the values of the current opening angle and the current post-injection quantity to an ECU to determine the current torque.
In another embodiment of the present application, the target parameter includes a target post-injection amount of the engine, and determining the target parameter of the post-treatment heating system according to the current rotation speed, the current torque, and the target torque includes: as shown in fig. 5, it is determined whether or not the difference between the current torque and the target torque is within a first predetermined range; under the condition that the difference value is in the first preset range, determining that the current post-injection quantity is the target post-injection quantity; and if the difference is not within the first predetermined range, adjusting the current post-injection amount so that the difference is within the first predetermined range and the adjusted current post-injection amount is the target post-injection amount. In this embodiment, the post-injection amount is increased so that the current torque reaches the target torque, and the deterioration of the diesel fuel consumption caused by the excessive increase of the post-injection amount can be effectively prevented.
In order to accurately calculate the post-injection amount required when the current torque reaches the target torque, in still another embodiment of the present application, adjusting the current post-injection amount without the difference being within the first predetermined range includes: a first calculation step of calculating a post-injection amount when the current torque reaches the target torque according to at least the current torque and the target torque, thereby obtaining a first post-injection amount of the engine; a first adjustment step of adjusting the current post-injection amount to the first post-injection amount; and repeating the first calculating step and the first adjusting step at least once in sequence until the difference between the current torque and the target torque is within the first preset range.
In practice, the first predetermined range may be-5 to 5Nm.
In still another embodiment of the present application, calculating the first post-injection amount of the engine based on at least the current torque and the target torque includes: acquiring a first difference value, wherein the first difference value is a torque change value when the post-injection oil quantity is increased by a first preset value; calculating the ratio of the first difference value to the first preset value to obtain a first slope; and calculating the sum of a first target ratio and the current post-injection quantity to obtain the first post-injection quantity, wherein the first target ratio is the ratio of the difference value of the target torque and the current torque to the first slope. And calculating the first post-injection quantity through the first slope, so that the result of calculating the post-injection quantity required when the current torque reaches the target torque is more rapid and accurate.
Specifically, fig. 6 is a schematic diagram showing calculation of the post-injection oil quantity, wherein the first predetermined value may be 2% -5% of the current oil quantity, and is recorded as Δg f The torque variation value when the post-injection quantity is increased by a first preset value, namely the first difference value is delta T q The current and the later oil injection quantity is g f,1 The target torque is T q,0 The current torque is T q,1 The first slope
The first post-injection quantity is->
In another embodiment of the present application, the target parameter includes a target opening angle of the exhaust valve, and determining the target parameter of the aftertreatment heating system according to the current rotational speed, the current torque, and the target torque, further includes: as shown in fig. 5, the current temperature of the aftertreatment inlet is obtained; determining whether a difference between the current temperature and the target temperature is within a second predetermined range; determining that the current opening angle is the target opening angle under the condition that the difference value is in the second preset range; and if the difference is not in the second preset range, adjusting the current opening angle so that the difference is in the second preset range and the adjusted current opening angle is the target opening angle. In this embodiment, the opening angle is adjusted until the temperature of the post-treatment inlet reaches the target temperature, so that excessive high-temperature exhaust of the post-treatment inlet caused by excessive opening angle is prevented, and the problem of excessive temperature of the post-treatment inlet is avoided.
In practical applications, the target temperature is the minimum required temperature of the aftertreatment inletDegree T min The value range is between 250 ℃ and 300 ℃ according to the change of different post-treatment systems.
In a specific embodiment of the present application, as shown in fig. 3, a stepper motor 106 is used to control the opening angle of the exhaust valve 103, where the control accuracy of the stepper motor is ±0.5°. The exhaust valve opening angle can control the effective flow area of exhaust gas and further control the flow rate of exhaust gas, and the angle range of the exhaust valve opening angle is 0-90 degrees, wherein 0 degrees indicates that the valve is in a fully closed state, 90 degrees indicates that the valve is in a maximum opening state, and the effective flow area of the valve is the same as the cross section area of the exhaust pipe. The aftertreatment inlet temperature at different exhaust valve opening angles can be calculated by a continuity equation and an energy conservation equation.
In order to accurately calculate the exhaust valve opening angle required when the current temperature reaches the target temperature, in still another embodiment of the present application, adjusting the current opening angle if the difference is not within the second predetermined range includes: a second calculation step of calculating an opening angle of the exhaust valve at which the current temperature reaches the target temperature, based on at least the current temperature and the target temperature, to obtain a first opening angle of the exhaust valve; a second adjustment step of adjusting the current opening angle to the first opening angle; and repeating the second calculating step and the second adjusting step at least once in sequence until the difference between the current temperature and the target temperature is within the second preset range.
In practical applications, the second predetermined range may be 0 ℃ to 3 ℃.
In still another embodiment of the present application, calculating the first opening angle of the exhaust valve at least according to the current temperature and the target temperature includes: obtaining a second difference value, wherein the second difference value is a temperature change value of the aftertreatment inlet when the opening angle of the exhaust valve is increased by a second preset value and the current torque of the engine reaches the target torque; calculating the ratio of the second difference value to the second preset value to obtain a second slope; and calculating the sum of a second target ratio and the current temperature to obtain the first open angle, wherein the second target ratio is the ratio of the difference value of the target temperature and the current temperature to the second slope. The first opening angle is calculated through the second slope, so that the result of calculating the opening angle of the exhaust valve required when the current temperature reaches the target temperature is more rapid and accurate.
Specifically, fig. 7 is a schematic view showing an exhaust valve opening angle calculation, wherein the second predetermined value may be 0 ℃ to 3 ℃, denoted as Δw, and the temperature change value of the aftertreatment inlet when the engine torque reaches the target torque, i.e., the second difference is Δt, and the current temperature is T 1 The target temperature is T 0 The current opening angle is W 1 The second slope
The first opening angle is->
In another specific embodiment of the present application, the target post-injection quantity and the target opening angle value are output and recorded in the ECU, so as to obtain the exhaust valve opening and post-injection quantity calibration Map data.
The embodiment of the application also provides a control device for the temperature of a post-treatment inlet, which is applied to the post-treatment inlet of a post-treatment heating system, wherein the post-treatment heating system comprises an engine, a turbine and an exhaust valve, the engine and the turbine are connected through an exhaust pipeline, the exhaust inlet of the engine is connected to an exhaust outlet of the turbine through a bypass pipeline, the exhaust outlet of the turbine is the post-treatment inlet, and the exhaust valve is arranged on the bypass pipeline. The following describes a control device for an after-treatment inlet temperature provided in an embodiment of the present application.
FIG. 8 is a schematic diagram of a control device for aftertreatment inlet temperature, according to an embodiment of the present disclosure. As shown in fig. 8, the apparatus includes:
An acquisition unit 10 for acquiring the current rotation speed, the current torque, and the target torque of the engine;
a determining unit 20 for determining a target parameter of the aftertreatment heating system based on at least the current rotational speed, the current torque, and the target torque, the target parameter including at least one of: the target post-injection amount of the engine and the target opening angle of the exhaust valve;
an adjusting unit 30 for increasing a current parameter to the target parameter so that the temperature of the post-treatment inlet is increased to the target temperature, wherein the current parameter includes at least one of: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve.
The control device of the post-treatment inlet temperature firstly obtains the current rotating speed, the current torque and the target torque of the engine through an obtaining unit; then, determining, by a determining unit, a target parameter of the aftertreatment heating system based at least on the current rotational speed, the current torque, and the target torque, the target parameter including at least one of: the target post-injection amount of the engine and the target opening angle of the exhaust valve; finally, increasing a current parameter to the target parameter to increase the temperature of the aftertreatment inlet to the target temperature, wherein the current parameter comprises at least one of the following: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve. The device improves the current post-injection oil quantity of the engine to the target post-injection oil quantity and/or improves the current opening angle of the exhaust valve to the target opening angle so as to improve the current temperature of the post-treatment inlet to the target temperature, thereby avoiding that the current temperature of the post-treatment inlet cannot be accurately improved to the required temperature due to the fact that the current injection oil quantity and/or the target opening angle are directly adjusted by the post-treatment inlet temperature in the prior art, and further solving the problem that the accuracy of improving the post-treatment inlet temperature to the required temperature is low in the prior art.
In order to quickly and accurately acquire the current torque of the aftertreatment heating system including the bypass passage, in one embodiment of the present application, the acquisition unit includes a first acquisition subunit, a first calculation subunit, and a first determination subunit, where the first acquisition subunit is configured to acquire the current rotation speed and the target torque of the engine; the first calculating subunit is configured to calculate the current opening angle of the exhaust valve and the current post-injection quantity of the engine according to the current rotation speed and the target torque; the first determining subunit is configured to determine the current torque according to the current opening angle and the current post injection amount.
Specifically, the current rotational speed of the engine may be obtained from an engine Electronic Control Unit (ECU). In addition, a semi-empirical model can be established, as shown in fig. 5, by adopting test data of similar models to establish mathematical relations among engine speed, torque, post-treatment inlet temperature, post-injection quantity and exhaust flow, and then adding a bypass pipeline flow model, namely the semi-empirical model. Substituting the current rotation speed, the target temperature and the target torque into a semi-empirical model to calculate the current opening angle and the current post-injection quantity of the exhaust valve, and transmitting the values of the current opening angle and the current post-injection quantity to an ECU to determine the current torque.
In another embodiment of the present application, the determining unit includes a second determining subunit, a third determining subunit, and a first adjusting subunit, where the second determining subunit is configured to determine whether a difference between the current torque and the target torque is within a first predetermined range; the third determination subunit is configured to determine, when the difference is in the first predetermined range, that the current post-injection amount is the target post-injection amount; the first adjustment subunit is configured to adjust the current post-injection amount such that the difference is within the first predetermined range and the adjusted current post-injection amount is the target post-injection amount when the difference is not within the first predetermined range. In this embodiment, the post-injection amount is increased so that the current torque reaches the target torque, and deterioration of the diesel fuel consumption due to excessive post-injection amount can be effectively prevented.
In order to accurately calculate the post-injection amount required when the current torque reaches the target torque, in another embodiment of the present application, the first adjustment subunit includes a first calculation module, a first adjustment module, and a first processing module, where the first calculation module is configured to calculate, in a first calculation step, the post-injection amount when the current torque reaches the target torque at least according to the current torque and the target torque, to obtain a first post-injection amount of the engine; the first adjusting module is used for adjusting the current post-injection oil quantity to the first post-injection oil quantity in a first adjusting step; the first processing module is configured to sequentially and repeatedly perform the first calculating step and the first adjusting step at least once until a difference between the current torque and the target torque is within the first predetermined range.
In practice, the first predetermined range may be-5 to 5Nm.
In still another embodiment of the present application, the first calculating module includes a first obtaining sub-module, a first calculating sub-module, and a second calculating sub-module, where the first obtaining sub-module is configured to obtain a first difference value, and the first difference value is a torque variation value when the post-injection oil quantity is increased by a first predetermined value; the first calculating submodule is used for calculating the ratio of the first difference value to the first preset value to obtain a first slope; the second calculating submodule is used for calculating the sum of a first target ratio and the current post-injection quantity to obtain the first post-injection quantity, wherein the first target ratio is the ratio of the difference value of the target torque and the current torque to the first slope. And calculating the first post-injection quantity through the first slope, so that the result of calculating the post-injection quantity required when the current torque reaches the target torque is more rapid and accurate.
Specifically, FIG. 6 is a schematic view of post-injection calculationThe first predetermined value may be 2% -5% of the current oil amount, and is denoted as Δg f The torque variation value when the post-injection quantity is increased by a first preset value, namely the first difference value is delta T q The current and the later oil injection quantity is g f,1 The target torque is T q,0 The current torque is T q,1 The first slope
The first post-injection quantity is->
In another embodiment of the present application, the determining unit further includes a second acquiring subunit, a fourth determining subunit, a fifth determining subunit, and a second adjusting subunit, where the second acquiring subunit is configured to acquire a current temperature of the post-processing inlet; the fourth determining subunit is configured to determine whether a difference between the current temperature and the target temperature is within a second predetermined range; the fifth determining subunit is configured to determine, when the difference is in the second predetermined range, that the current opening angle is the target opening angle; the second adjustment subunit is configured to adjust the current opening angle when the difference value is not in the second predetermined range, so that the difference value is in the second predetermined range and the adjusted current opening angle is the target opening angle. In this embodiment, the opening angle is adjusted until the temperature of the post-treatment inlet reaches the target temperature, so that excessive high-temperature exhaust of the post-treatment inlet caused by excessive opening angle is prevented, and the problem of excessive temperature of the post-treatment inlet is avoided.
In practical application, the target temperature is the minimum required temperature T of the aftertreatment inlet min The value range is between 250 ℃ and 300 ℃ according to the change of different post-treatment systems.
In a specific embodiment of the present application, as shown in fig. 3, a stepper motor 106 is used to control the opening angle of the exhaust valve 103, where the control accuracy of the stepper motor is ±0.5°. The exhaust valve opening angle can control the effective flow area of exhaust gas and further control the flow rate of exhaust gas, and the angle range of the exhaust valve opening angle is 0-90 degrees, wherein 0 degrees indicates that the valve is in a fully closed state, 90 degrees indicates that the valve is in a maximum opening state, and the effective flow area of the valve is the same as the cross section area of the exhaust pipe. The aftertreatment inlet temperature at different exhaust valve opening angles can be calculated by a continuity equation and an energy conservation equation.
In order to accurately calculate the opening angle of the exhaust valve required when the current temperature reaches the target temperature, in another embodiment of the present application, the second adjustment subunit includes a second calculation module, a second adjustment module, and a second processing module, where the second calculation module is configured to calculate, in a second calculation step, the opening angle of the exhaust valve when the current temperature reaches the target temperature at least according to the current temperature and the target temperature, to obtain a first opening angle of the exhaust valve; the second adjusting module is used for adjusting the current opening angle to the first opening angle in a second adjusting step; the second processing module is configured to sequentially repeat the second calculating step and the second adjusting step at least once until the difference between the current temperature and the target temperature is within the second predetermined range.
In practical applications, the second predetermined range may be 0 ℃ to 3 ℃.
In still another embodiment of the present application, the second calculating module includes a second obtaining sub-module, a third calculating sub-module, and a fourth calculating sub-module, where the second obtaining sub-module is configured to obtain a second difference value, the second difference value is a temperature change value of the post-treatment inlet when the opening angle of the exhaust valve increases by a second predetermined value, and the current torque of the engine reaches the target torque; the third calculating sub-module is configured to calculate a ratio of the second difference to the second predetermined value to obtain a second slope; the fourth calculating submodule is used for calculating the sum of a second target ratio and the current temperature to obtain the first open angle, wherein the second target ratio is the ratio of the difference value of the target temperature and the current temperature to the second slope. The first opening angle is calculated through the second slope, so that the result of calculating the opening angle of the exhaust valve required when the current temperature reaches the target temperature is more rapid and accurate.
Specifically, fig. 7 is a schematic view showing an exhaust valve opening angle calculation, wherein the second predetermined value may be 0 ℃ to 3 ℃, denoted as Δw, and the temperature change value of the aftertreatment inlet when the engine torque reaches the target torque, i.e., the second difference is Δt, and the current temperature is T 1 The target temperature is T 0 The current opening angle is W 1 The second slope
The first opening angle is->
In another specific embodiment of the present application, the apparatus further includes an output unit, where the output unit is configured to output the target post-injection quantity and the target opening angle value and record the values in the ECU, so as to obtain the exhaust valve opening and post-injection quantity calibration Map data.
The control device for the post-processing inlet temperature comprises a processor and a memory, wherein the acquisition unit, the determination unit, the adjustment unit and the like are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The kernel can be provided with one or more than one kernel, and the problem of low accuracy of improving the post-processing inlet temperature to the required temperature in the prior art is solved by adjusting the kernel parameters.
The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.
An embodiment of the present invention provides a computer-readable storage medium having stored thereon a program which, when executed by a processor, implements the above-described method of controlling post-processing inlet temperature.
The embodiment of the invention provides a processor, which is used for running a program, wherein the control method of the post-processing inlet temperature is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:
step S101, obtaining the current rotating speed, the current torque and the target torque of the engine;
step S102, determining target parameters of the aftertreatment heating system at least according to the current rotating speed, the current torque and the target torque, wherein the target parameters comprise at least one of the following: the target post-injection amount of the engine and the target opening angle of the exhaust valve;
step S103, increasing the current parameters to the target parameters so that the temperature of the post-treatment inlet is increased to the target temperature, wherein the current parameters comprise at least one of the following: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve.
The device herein may be a server, PC, PAD, cell phone, etc.
The present application also provides a computer program product adapted to perform a program initialized with at least the following method steps when executed on a data processing device:
step S101, obtaining the current rotating speed, the current torque and the target torque of the engine;
step S102, determining target parameters of the aftertreatment heating system at least according to the current rotating speed, the current torque and the target torque, wherein the target parameters comprise at least one of the following: the target post-injection amount of the engine and the target opening angle of the exhaust valve;
step S103, increasing the current parameters to the target parameters so that the temperature of the post-treatment inlet is increased to the target temperature, wherein the current parameters comprise at least one of the following: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units may be a logic function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the above-mentioned method of the various embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
1) Firstly, acquiring the current rotating speed, the current torque and the target torque of the engine; then, determining a target parameter of the aftertreatment heating system based at least on the current rotational speed, the current torque, and the target torque, the target parameter including at least one of: the target post-injection amount of the engine and the target opening angle of the exhaust valve; finally, increasing a current parameter to the target parameter to increase the temperature of the aftertreatment inlet to the target temperature, wherein the current parameter comprises at least one of the following: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve. The method comprises the steps of determining the target post-injection oil quantity and/or the target opening angle required when the post-treatment inlet temperature reaches the required temperature, then increasing the current post-injection oil quantity of the engine to the target post-injection oil quantity and/or increasing the current opening angle of the exhaust valve to the target opening angle so as to increase the current temperature of the post-treatment inlet to the target temperature, thereby avoiding the problem that the post-treatment inlet temperature cannot be accurately increased to the required temperature due to the fact that the post-treatment inlet temperature is directly regulated by the post-treatment inlet temperature in the prior art, and further solving the problem that the accuracy of increasing the post-treatment inlet temperature to the required temperature is low.
2) Firstly, acquiring the current rotating speed, the current torque and the target torque of the engine through an acquisition unit; then, determining, by a determining unit, a target parameter of the aftertreatment heating system based at least on the current rotational speed, the current torque, and the target torque, the target parameter including at least one of: the target post-injection amount of the engine and the target opening angle of the exhaust valve; finally, increasing a current parameter to the target parameter by an adjusting unit so as to enable the temperature of the post-treatment inlet to be increased to the target temperature, wherein the current parameter comprises at least one of the following: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve. The device improves the current post-injection oil quantity of the engine to the target post-injection oil quantity and/or improves the current opening angle of the exhaust valve to the target opening angle so as to improve the current temperature of the post-treatment inlet to the target temperature, thereby avoiding that the current temperature of the post-treatment inlet cannot be accurately improved to the required temperature due to the fact that the current injection oil quantity and/or the target opening angle are directly adjusted by the post-treatment inlet temperature in the prior art, and further solving the problem that the accuracy of improving the post-treatment inlet temperature to the required temperature is low in the prior art.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. A control method of an aftertreatment inlet temperature, characterized by being applied to an aftertreatment inlet of an aftertreatment heating system, the aftertreatment heating system including an engine, a turbine, an exhaust valve, the engine and the turbine being connected by an exhaust line, the exhaust inlet of the engine being connected to an exhaust outlet of the turbine by a bypass line, the exhaust outlet of the turbine being the aftertreatment inlet, the exhaust valve being disposed on the bypass line, the control method comprising:
acquiring the current rotating speed, the current torque and the target torque of the engine;
determining a target parameter of the aftertreatment heating system based at least on the current rotational speed, the current torque, and the target torque, the target parameter comprising at least one of: the target post-injection quantity of the engine and the target opening angle of the exhaust valve;
Increasing a current parameter to the target parameter such that the temperature of the aftertreatment inlet is increased to a target temperature, the current parameter including at least one of: the current back oil injection quantity of the engine and the current opening angle of the exhaust valve acquire the current rotating speed, the current torque and the target torque of the engine, and the method comprises the following steps:
acquiring the current rotation speed and the target torque of the engine;
calculating the current opening angle of the exhaust valve and the current back oil injection quantity of the engine according to the current rotating speed and the target torque;
and determining the current torque according to the current opening angle and the current back oil injection quantity.
2. The control method according to claim 1, wherein the target parameter includes a target post-injection amount of the engine, and determining the target parameter of the aftertreatment heating system based on the current rotational speed, the current torque, and the target torque includes:
determining whether a difference between the current torque and the target torque is within a first predetermined range;
determining that the current post-injection quantity is the target post-injection quantity under the condition that the difference value is in the first preset range;
And if the difference value is not in the first preset range, adjusting the current post-injection quantity so that the difference value is in the first preset range and the adjusted current post-injection quantity is the target post-injection quantity.
3. The control method according to claim 2, characterized in that, in the case where the difference is not in the first predetermined range, adjusting the current post-injection amount includes:
a first calculation step of calculating a post-injection quantity when the current torque reaches the target torque at least according to the current torque and the target torque to obtain a first post-injection quantity of the engine;
a first adjustment step of adjusting the current post-injection quantity to the first post-injection quantity;
and sequentially repeating the first calculation step and the first adjustment step at least once until the difference between the current torque and the target torque is within the first preset range.
4. The control method according to claim 3, characterized in that calculating a first post-injection amount of the engine based on at least the current torque and the target torque includes:
acquiring a first difference value, wherein the first difference value is a torque change value when the post-injection oil quantity is increased by a first preset value;
Calculating the ratio of the first difference value to the first preset value to obtain a first slope;
and calculating the sum of a first target ratio and the current post-injection quantity to obtain the first post-injection quantity, wherein the first target ratio is the ratio of the difference value of the target torque and the current torque to the first slope.
5. The control method according to claim 1, wherein the target parameter includes a target opening angle of the exhaust valve, and determining the target parameter of the aftertreatment heating system based on the current rotational speed, the current torque, and the target torque further includes:
acquiring the current temperature of the post-treatment inlet;
determining whether a difference between the current temperature and the target temperature is within a second predetermined range;
determining that the current opening angle is the target opening angle under the condition that the difference value is in the second preset range;
and if the difference value is not in the second preset range, adjusting the current opening angle so that the difference value is in the second preset range and the adjusted current opening angle is the target opening angle.
6. The control method according to claim 5, characterized in that, in the case where the difference is not in the second predetermined range, adjusting the current opening angle includes:
A second calculation step of calculating an opening angle of the exhaust valve when the current temperature reaches the target temperature according to at least the current temperature and the target temperature to obtain a first opening angle of the exhaust valve;
a second adjustment step of adjusting the current opening angle to the first opening angle;
and sequentially repeating the second calculation step and the second adjustment step at least once until the difference between the current temperature and the target temperature is within the second preset range.
7. The control method according to claim 6, characterized in that calculating a first opening angle of the exhaust valve based on at least the current temperature and the target temperature, comprises:
acquiring a second difference value, wherein the second difference value is a temperature change value of the aftertreatment inlet when the opening angle of the exhaust valve is increased by a second preset value and the current torque of the engine reaches the target torque;
calculating the ratio of the second difference value to the second preset value to obtain a second slope;
and calculating the sum of a second target ratio and the current temperature to obtain the first open angle, wherein the second target ratio is the ratio of the difference value of the target temperature and the current temperature to the second slope.
8. A control device of aftertreatment inlet temperature, characterized by being applied to the aftertreatment inlet of aftertreatment heating system, aftertreatment heating system includes engine, turbine, discharge valve, the engine with the turbine passes through exhaust piping connection, the exhaust inlet of engine passes through bypass line connection to the exhaust outlet of turbine, the exhaust outlet of turbine is the aftertreatment inlet, discharge valve sets up on the bypass line, control device includes:
an acquisition unit for acquiring a current rotation speed, a current torque and a target torque of the engine;
a determining unit configured to determine a target parameter of the aftertreatment heating system based at least on the current rotational speed, the current torque, and the target torque, the target parameter including at least one of: the target post-injection quantity of the engine and the target opening angle of the exhaust valve;
an adjustment unit for increasing a current parameter to the target parameter such that the temperature of the aftertreatment inlet is increased to a target temperature, the current parameter comprising at least one of: the acquisition unit comprises a first acquisition subunit, a first calculation subunit and a first determination subunit, wherein the first acquisition subunit is used for acquiring the current rotating speed and the target torque of the engine; the first calculating subunit is used for calculating the current opening angle of the exhaust valve and the current back oil injection quantity of the engine according to the current rotating speed and the target torque; the first determining subunit is used for determining the current torque according to the current opening angle and the current rear oil injection quantity.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program performs the method of any one of claims 1 to 7.
10. A processor for running a program, wherein the program when run performs the method of any one of claims 1 to 7.
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| US5063744A (en) * | 1988-10-06 | 1991-11-12 | Toyota Jidosha Kabushiki Kaisha | Actuator for controlling intake pressure in sequential turbo-system |
| DE60238235D1 (en) * | 2001-09-07 | 2010-12-23 | Mitsubishi Motors Corp | Device for exhaust emission control of an engine |
| JP2004211638A (en) * | 2003-01-07 | 2004-07-29 | Nissan Motor Co Ltd | Filter regeneration control system of diesel engine |
| JP2004293339A (en) * | 2003-03-25 | 2004-10-21 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device |
| JP5281564B2 (en) * | 2009-12-25 | 2013-09-04 | 三菱重工業株式会社 | DPF regeneration control device |
| GB2492428B (en) * | 2011-06-29 | 2014-05-14 | Perkins Engines Co Ltd | Method and apparatus for controlling the operation of a turbocharged internal combustion engine |
| WO2017199363A1 (en) * | 2016-05-18 | 2017-11-23 | 三菱重工業株式会社 | Multi-stage turbo supercharging system |
| FR3059723B1 (en) * | 2016-12-05 | 2020-12-25 | Continental Automotive France | PROCESS FOR MANAGING THE INJECTION IN A DIESEL TYPE ENGINE |
| CN206592181U (en) * | 2017-01-22 | 2017-10-27 | 东风商用车有限公司 | A kind of device for improving diesel exhaust gas temperature |
| CN109667680B (en) * | 2018-12-28 | 2022-06-28 | 潍柴动力股份有限公司 | Heat removal and management method, device and system |
| CN109973175A (en) * | 2019-03-20 | 2019-07-05 | 一汽解放汽车有限公司 | Temprature control method when diesel particulate trap regenerates |
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