Power generation control method for electric loading system of mixer truck and electric loading system

Abstract

The embodiment of the invention provides a power generation control method of an electric loading system of a mixer truck and the electric loading system. The power generation control method is used for solving the problem that in the prior art, oil consumption is high during power generation driving. The mixer truck comprises a chassis and an electric loading system, the chassis comprises an engine, the electric loading system comprises a generator, a generator controller, a driving motor, a driving motor controller and a battery unit, the battery unit is electrically connected with the generator and the driving motor, and the driving motor is used for driving a stirring device. The method comprises the steps that when it is determined that the mixer truck is in a running working condition, the rotating speed of an engine and the load of the engine are obtained; when the rotating speed of the engine and the load of the engine meet efficient power generation conditions, the generator controller controls the generator to generate power; wherein the efficient power generation condition is that the engine rotating speed is larger than the first set rotating speed and smaller than the second set rotating speed, and the engine load is larger than the first set load and smaller than the second set load.

Description

Technical Field

[0001] The present application relates to the technical field of electric upper mounting systems for mixer trucks, and in particular to a power generation control method for an electric upper mounting system for a mixer truck and an electric upper mounting system. Background Art

[0002] A mixer truck, such as a concrete mixer truck, usually includes an upper system and a chassis driving system. The upper system is equipped with a mixing tank for loading and mixing concrete. A diesel engine is generally used for driving, and the hydraulic system is driven by a power take-off to drive the mixing tank of the upper system to rotate. In order to avoid the problem of solidification during concrete transportation, the engine needs to be in a working state continuously to provide power for the rotation of the upper mixing tank. In addition, when the mixer truck is parked, the vehicle will have a higher idling fuel consumption. At the same time, because the rotation speed of the mixing tank is also affected by the engine speed, the mixing tank will cause unnecessary speed changes during driving, affecting the fuel consumption of the whole machine. In the prior art, a power battery can be configured in the vehicle upper system, and the upper system can be driven by the battery power supply. However, in the prior art, whether the upper system generates electricity is controlled by the battery unit power or the vehicle speed, and the entire material transportation process is not finely managed, which will result in higher power generation fuel consumption. Summary of the invention

[0003] The embodiments of the present application provide a power generation control method, a device and a mixer truck, which are used to solve the problem of high fuel consumption during power generation drive in the prior art.

[0004] In a first aspect, an embodiment of the present application provides a power generation control method for an electric upper mounting system of a mixer truck, wherein the mixer truck includes a chassis and an electric upper mounting system, wherein the chassis includes an engine, and the electric upper mounting system includes a generator, a generator controller, a drive motor, a drive motor controller, and a battery unit, wherein the battery unit is electrically connected to the generator and the drive motor, respectively, and the drive motor is used to drive a stirring device, and the control method includes:

[0005] When it is determined that the mixer truck is in a driving condition, obtaining the speed of the engine and the load of the engine;

[0006] When the speed of the engine and the load of the engine meet the high-efficiency power generation condition, the generator controller controls the generator to generate electricity;

[0007] Wherein, the efficient power generation condition is:

[0008] The engine speed is greater than a first set speed and less than a second set speed, and the engine load is greater than a first set load and less than a second set load, the first set speed is less than the second set speed, and the first set load is less than the second set load.

[0009] In a possible implementation, the load of the engine is the torque of the engine or the power of the engine.

[0010] In a possible implementation, the high-efficiency power generation condition satisfies the condition shown in the following formula:

[0011]

[0012] n d and n u Satisfy the conditions described in the following formula:

[0013]

[0014] Wherein, n represents the speed of the engine, n d represents the first set speed, n u represents the second set speed, M represents the load of the engine, M d It is used to represent the first set load, M max Used to represent the second set load, M max is the maximum load at the current engine speed, n0 is used to represent the engine idle speed, n max Used to indicate the maximum engine speed.

[0015] In a possible implementation, the method further includes:

[0016] Acquiring universal characteristic data of the engine;

[0017] Determining, based on the engine speed curve in the universal characteristic data, a first set speed and a second set speed when a set power generation efficiency is satisfied;

[0018] Based on the engine load curve in the universal characteristic data, a first set load and a second set load when a set power generation efficiency is satisfied are determined.

[0019] In a possible implementation, the first set speed, the second set speed, the first set load, and the second set load are obtained through self-learning, and the self-learning step includes:

[0020] Step 1, when the mixer truck is in a driving condition, starting the generator to generate electricity, and recording the self-learning driving mileage and the self-learning transport mileage;

[0021] Step 2: The electric upper body system collects the real-time load M of the engine in real time. s And the real-time speed value n s ;

[0022] Step 3: When the first set condition is met, the first stage of self-learning ends, and the maximum real-time load M obtained during the first stage of self-learning is recorded. s max and the maximum real-time speed value n s max ;

[0023] The first setting condition is that the driving mileage is greater than the first setting mileage threshold, and the transportation mileage is greater than the second setting mileage threshold;

[0024] Step 4: Based on the maximum real-time load M s max and the maximum real-time speed value n s max Set i groups of high-efficiency power generation intervals, each group of high-efficiency power generation intervals includes the first speed n 1i , second speed n 2i and the first load M i ;

[0025] Step 5: Perform the second stage of self-learning for each group of high-efficiency power generation intervals:

[0026] The speed and load of the mixer truck's engine are set based on the high-efficiency power generation interval, and a fuel consumption test is performed. When the second set condition is met, the second stage of self-learning is terminated, and the fuel consumption is recorded; wherein the second set condition is that the mileage of the second stage of self-learning is greater than the third set mileage threshold, and the transportation mileage is greater than the fourth set mileage threshold;

[0027] Step 6: In the second stage of self-learning, the first speed, the second speed and the first load in the high-efficiency power generation range corresponding to the minimum fuel consumption are used as the first set speed, the second set speed and the first set load, and the maximum real-time load is used as the second set load.

[0028] In a possible implementation, the first load is less than the maximum real-time load, and the first speed n 1i Satisfy the conditions shown in the following formula:

[0029] n0<n 1i <1 / 2(n s max -n0)+n0;

[0030] The second speed n 2i Satisfy the conditions shown in the following formula:

[0031] n 2i =n 1i +1 / 2(n s max -n0);

[0032] Wherein, n0 represents the idle speed of the engine.

[0033] In a possible implementation, the judgment condition of the driving condition is: the driving speed is greater than a first speed threshold and the duration is greater than a first set duration;

[0034] The judgment condition of the transportation working condition is: when in the driving working condition, the real-time load of the driving motor is greater than the load threshold and the duration is greater than the second set duration.

[0035] In a possible implementation, the generator controller controls the generator to generate electricity, including:

[0036] Obtaining the remaining power of the battery unit;

[0037] When the remaining power is greater than a first power threshold, the generator controller controls the generator to generate power and provide it to the drive motor;

[0038] When the remaining power is less than or equal to the first power threshold, the generator controller controls the generator to generate power for the battery unit and the drive motor.

[0039] In a possible implementation, the method further includes:

[0040] When the mixer truck is in a driving condition and does not meet the high-efficiency power generation condition, or when the mixer truck is in a parking condition, obtaining the remaining power of the battery unit;

[0041] If the remaining power is less than a second power threshold, the generator is controlled to charge the battery unit until the remaining power is greater than or equal to the second power threshold and power generation is stopped.

[0042] In a possible implementation, the judgment condition of the parking condition is: the driving speed is less than the second speed threshold and the duration is greater than the third set duration.

[0043] In a second aspect, an embodiment of the present application provides an electric loading system for a mixer truck, comprising:

[0044] A memory for storing program instructions;

[0045] The processor is used to obtain the program instructions in the memory and implement the method described in the first aspect and different implementation methods of the first aspect according to the obtained program instructions.

[0046] In a third aspect, an embodiment of the present application provides a mixer truck, comprising the electric upper mounting system described in the second aspect.

[0047] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium includes computer instructions. When the computer instructions are executed by a computer, the method described in the first aspect and different implementation methods of the first aspect are implemented.

[0048] In the present application, the driving condition judgment is introduced in the power generation control of the electric upper system of the mixer truck. When generating electricity, by combining the engine speed and workload, the mixer engine is made to generate electricity in the high-efficiency power generation range as much as possible, so as to reduce the fuel consumption caused by power generation control.

[0049] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 A schematic diagram of an electric upper mounting system for a mixer truck provided in an embodiment of the present application;

[0052] Figure 2 A flow chart of a power generation control method for an electric upper mounting system of a mixer truck provided in an embodiment of the present application;

[0053] Figure 3 A schematic diagram of a universal characteristic curve of an engine provided in an embodiment of the present application;

[0054] Figure 4 A flow chart of a self-learning of an efficient power generation area provided in an embodiment of the present application;

[0055] Figure 5 A schematic diagram of a power generation control device for an electric upper mounting system of a mixer truck provided in an embodiment of the present application;

[0056] Figure 6 A structural diagram of an electric upper mounting system for a mixer truck provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be arbitrarily combined with each other. In addition, although the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in an order different from that here.

[0058] The terms "first" and "second" in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "comprising" and any of their variations are intended to cover non-exclusive protection. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices. "Multiple" in the present application can mean at least two, for example, two, three or more, and the embodiments of the present application are not limited.

[0059] A mixer truck, such as a concrete mixer truck, usually includes an upper system and a chassis driving system. The upper system is equipped with a mixing tank for loading and mixing concrete. A diesel engine is generally used for driving, and the hydraulic system is driven by a power take-off to drive the mixing tank of the upper system to rotate. In order to avoid the problem of solidification during concrete transportation, the engine needs to be in a working state continuously to provide power for the rotation of the upper mixing tank. In addition, when the mixer truck is parked, the vehicle will have a higher idling fuel consumption. At the same time, because the rotation speed of the mixing tank is also affected by the engine speed, the mixing tank will cause unnecessary speed changes during driving, affecting the fuel consumption of the whole machine. In the prior art, a power battery can be configured in the vehicle upper system, and the upper system can be driven by the battery power supply. However, in the prior art, whether the upper system generates electricity is controlled by the battery unit power or the vehicle speed, and the entire material transportation process is not finely managed, which will result in higher power generation fuel consumption.

[0060] In view of the above problems, the embodiment of the present application provides a power generation control method and an electric upper system of a mixer truck, wherein the mixer truck includes a chassis and an electric upper system, the chassis includes an engine, the electric upper system includes a generator, a generator controller, a drive motor, a drive motor controller, and a battery unit, the battery unit is electrically connected to the generator and the drive motor, and the drive motor is used to drive a stirring device. When it is determined that the mixer truck is in a driving condition, the engine speed and the load of the engine of the mixer truck are obtained, and then it is determined whether the engine speed and the load meet the conditions for efficient power generation. Further, when the engine speed and meet the conditions for efficient power generation, the upper system of the mixer truck is controlled to generate electricity. When the mixer truck is in a driving condition and does not meet the first set condition, or when the mixer truck is in a parking condition, the remaining power of the battery unit is obtained, and then the upper system is controlled by the power of the battery to charge the battery unit. Based on the above scheme, it is determined whether the conditions for efficient power generation are met by the engine speed and load, and then whether the mixer truck is generating electricity is controlled, so that the mixer truck can generate electricity in the efficient power generation range as much as possible to reduce the fuel consumption consumed during power generation.

[0061] The power generation control method of the electric upper mounting system of a mixer truck provided in the embodiment of the present application can be executed by the electric upper mounting system of the mixer truck. Figure 1 As shown, it is a structural schematic diagram of an electric upper system of a mixer truck provided in an embodiment of the present application, including a drive motor system 110, a generator system 120 and a battery unit 130. Among them, the drive motor system 110 includes a drive motor 111 and a drive motor controller 112, and the generator system 120 includes a generator 121 and a generator controller 122. The generator 121 is connected to the power take-off port of the chassis engine 140, and the engine 140 drives the generator 121 to generate electricity, charge the battery unit 130 or provide electrical energy for the drive motor 111; the drive motor 111 is connected to the reducer 151 of the stirring device to drive the stirring tank 152 to rotate.

[0062] In some embodiments, the generator controller 122 can be used to determine whether the mixer truck is in a driving condition. When it is determined that the mixer truck is in a driving condition, the speed and load of the engine 140 of the mixer truck are obtained, and then it is determined whether the engine speed and load meet the conditions for efficient power generation. When it is determined that the conditions for efficient power generation are met, the generator controller 122 controls the generator 121 to generate electricity. When it is in a driving condition but does not meet the conditions for efficient power generation, or when it is in a parking condition, the remaining power of the battery unit 130 is obtained, and then it is determined whether to generate electricity based on the remaining power.

[0063] In some embodiments, the electric upper system further includes a central control display unit 160 and a rear control panel 170 , wherein the central control display unit 160 is used to monitor the system status and the driver's operation settings, and the rear control panel 170 is used to control and monitor the status of the stirring device.

[0064] Understandably, Figure 1 The structure of the electric upper installation system shown is only an example. The structure of the electric upper installation system may include more components. The specific model and specific implementation method of each component are not specifically limited in this application.

[0065] The present application provides a method for controlling power generation of an electric upper system of a mixer truck. Figure 2 The flow chart of the power generation control method of the electric upper system of a mixer truck is shown as an example. Figure 1 The electric upper body system can be executed by the generator controller 122 in the electric upper body system. For the convenience of description, the following description of each component is not illustrated with numerical identifiers. The specific process is as follows:

[0066] S201, when it is determined that the mixer truck is in a driving condition, the engine speed and the engine load are obtained.

[0067] In some embodiments, the operation conditions of the mixer truck include three conditions: transportation, return to the factory, and parking, wherein the transportation condition and the return to the factory condition belong to the driving condition of the mixer truck. When it is determined that the mixer truck is in the driving condition, the engine speed and the engine load are obtained.

[0068] In some embodiments, the driving condition can be determined by:

[0069] In some scenarios, the driving speed of the mixer truck can be obtained. When the driving speed of the mixer truck is greater than the first speed threshold and the duration is greater than the first set time, it is determined that the mixer truck is in a driving condition. When the mixer truck is in a driving condition, if the real-time load of the drive motor is greater than the load threshold and the duration is greater than the second set time, it is determined that the mixer truck is in a transportation condition, otherwise it is a return to the factory condition. Among them, the first set time and the second set time can be the same or different, and this application does not make specific limitations on this.

[0070] As an example, taking the first speed threshold as 10km / s and the first set time as 10s, when the driving speed of the mixer truck is greater than 10km / s and the duration of the driving speed greater than 10km / s exceeds 10s, it is determined that the mixer truck is in a driving condition.

[0071] S202, when the engine speed and the engine load meet the high-efficiency power generation conditions, the generator controller controls the generator to generate electricity; wherein the high-efficiency power generation conditions are that the engine speed is greater than a first set speed and less than a second set speed, and the engine load is greater than a first set load and less than a second set load.

[0072] The first set speed is smaller than the second set speed, and the first set load is smaller than the second set load.

[0073] In some embodiments, the load of the engine is the torque of the engine or the power of the engine.

[0074] When the mixer truck is determined to be in driving condition, the high-efficiency power generation strategy is started, which starts or stops high-efficiency power generation according to the engine speed and engine load. Specifically, when the engine speed and engine load meet the high-efficiency power generation conditions, high-efficiency power generation is started. The high-efficiency power generation conditions meet the conditions shown in the following formula:

[0075]

[0076] Among them, n represents the engine speed, M represents the engine load, and n d It is used to indicate the first set speed, i.e. the lower speed limit of the high-efficiency power generation range, n u It is used to indicate the second set speed, which is the upper limit of the speed in the high-efficiency power generation range. d It is used to indicate the first set load, which is the lower limit of the load in the high-efficiency power generation range. max Used to indicate the second set load, which is the maximum load at the current engine speed.

[0077] In some scenarios, n d and n u Satisfy the conditions described in the following formula:

[0078]

[0079] Among them, n0 is used to represent the engine idle speed, which is generally above 700rpm, n max Used to indicate the maximum engine speed.

[0080] The following is a specific description using the engine load as the engine torque. When the mixer truck is determined to be in a driving condition, the high-efficiency power generation strategy is started. The strategy starts or stops high-efficiency power generation according to the engine speed and the engine torque. Specifically, when the engine speed and the engine torque meet the high-efficiency power generation conditions, high-efficiency power generation is started. The high-efficiency power generation conditions meet the conditions shown in the following formula:

[0081]

[0082] Wherein, n represents the speed of the engine, n d represents the first set speed, n u represents the second set speed, M represents the torque of the engine, M d Used to indicate the first set torque, M max It is used to indicate the second set torque, which is the maximum torque at the current engine speed, n0 is used to indicate the engine idle speed, n max Used to indicate the maximum engine speed.

[0083] Similarly, when the load of the engine is the power of the engine, the setting of the efficient power generation conditions can refer to the above process, and the details will not be repeated.

[0084] In some embodiments, when the generator controller controls the generator to generate electricity, it can be achieved in the following manner: obtain the remaining power of the battery unit in the electric upper system; when the remaining power is greater than the first power threshold, the generator controller controls the generator to generate electricity and provide it to the driving motor of the stirring device. When the remaining power is less than or equal to the first power threshold, the generator controller controls the generator to generate electricity and provide it to the battery unit and the driving motor, so that the battery unit is charged and the driving motor drives the stirring device to work.

[0085] As an example, taking the first power threshold as 60%, when the remaining power of the battery unit is greater than 60%, the generator controller in the electric upper body system controls the generator to generate power for the drive motor. When the remaining power of the battery unit is less than or equal to 60%, the large motor controller in the electric upper body system controls the generator to generate power, and the generator not only charges the battery unit but also supplies power to the drive motor.

[0086] In some embodiments, the power generation control method may further include the following steps:

[0087] S203, when the concrete mixer truck is in a driving condition and does not meet the high-efficiency power generation condition, or when the concrete mixer truck is in a parking condition, obtain the remaining power of the battery unit.

[0088] In some scenarios, when the mixer truck is powered on, it is assumed that the mixer truck is in the parking state. Alternatively, when the driving speed of the mixer truck is less than the second speed threshold and the duration exceeds the third set duration, it is determined that the mixer truck is in the parking state. The second speed threshold is less than the first speed threshold.

[0089] As an example, taking the second speed threshold as 5 km / s and the third set time as 10 seconds, when the driving speed of the mixer truck is less than 5 km / s and the time when the driving speed is less than 5 km / s is greater than 10 seconds, it is determined that the mixer truck is in the parking state.

[0090] S204: If the remaining power is less than the second power threshold, control the generator to charge the battery unit until the remaining power is greater than or equal to the second power threshold and then stop generating power.

[0091] The second power threshold may be equal to the first power threshold or may be different from the first power threshold, and this application does not make any specific limitation on this.

[0092] Based on the above scheme, when the vehicle is in a driving condition, the present application determines whether the vehicle meets the high-efficiency power generation parameters based on the engine speed and the engine load, and then determines whether the generator in the electric upper body system is generating electricity, so that the electric upper body system can generate electricity in the high-efficiency power generation range as much as possible, thereby reducing the fuel consumption during power generation.

[0093] In some embodiments, the universal characteristic data of the engine is obtained; based on the engine speed curve in the universal characteristic data, the first set speed and the second set speed when the set power generation efficiency is met are determined. Further, based on the engine load curve in the universal characteristic data, the first set load and the second set load when the set power generation efficiency is met can be determined.

[0094] As an example, Figure 3 As shown in the figure, it is the universal characteristic curve of the mixer truck engine. Taking the engine load as the engine torque as an example, the speed range and torque range in the efficient power generation condition should cover the low specific fuel consumption range in the universal characteristic of the engine as much as possible. Figure 3 As shown, the gray area is a schematic diagram of the high-efficiency power generation range. Further, the speed range and torque range can be determined according to the low specific fuel consumption range.

[0095] In some embodiments, for a modified mixer truck, it is often difficult to obtain the universal characteristic data of the mixer truck engine, and thus it is impossible to determine the efficient power generation conditions. In some scenarios, when the universal characteristic data of the mixer truck engine is unknown, the first set speed, the second set speed, the first set load, and the second set load can be obtained through self-learning, and the self-learning process is as follows:

[0096] Step 1: When the mixer truck is in driving condition, start the generator to generate electricity and record the self-learning driving mileage and self-learning transport mileage.

[0097] Step 2: The electric upper body system collects the real-time load M of the engine in real time. s And the real-time speed value n s .

[0098] Step 3: When the first set condition is met, the first stage of self-learning ends, and the maximum real-time load M obtained during the first stage of self-learning is recorded. s max and the maximum real-time speed value n s max.

[0099] Among them, the first set condition is that the driving mileage is greater than the first set mileage threshold, and the transportation mileage is greater than the second set mileage threshold.

[0100] As an example, the total mileage of the first preset self-learning is expressed as S s1 , where S s1 It can be set to no less than 2000km. Of course, it can also be set to other mileages, which are not specifically limited in this application. The first stage self-learning mileage S1 is not less than 0.1S s1 km, the first stage of self-learning transportation mileage S t1 Not less than 0.05S s1 km, of course, the first stage of self-learning mileage S1 can also be set to no less than 0.08S s1 km, the first stage of self-learning transportation mileage S t1 It can also be set to no less than 0.04S s1 km, or other mileage, which is not specifically limited in this application.

[0101] Step 4: Based on the maximum real-time load M s max and the maximum real-time speed value n s max Set i groups of high-efficiency power generation intervals, each group of high-efficiency power generation intervals includes the first speed n 1i , second speed n 2i and the first load M i .

[0102] In some embodiments, the first load is less than the maximum real-time load M s max . Preferably, the first load is greater than 1 / 2M s max 、1 / 3M s max 、1 / 4M s max . First speed n 1i Satisfy the conditions shown in the following formula:

[0103] n0<n 1i <1 / 2(n s max -n0)+n0;

[0104] The second speed n 2i Satisfy the conditions shown in the following formula:

[0105] n 2o =n 1i +1 / 2(n s max -n0);

[0106] Wherein, n0 represents the idle speed of the engine.

[0107] Step 5, performing the second stage of self-learning for each group of high-efficiency power generation intervals: setting the engine speed and load of the mixer truck based on the high-efficiency power generation intervals, performing a fuel consumption test, and ending the second stage of self-learning when the second set condition is met, and recording the fuel consumption; wherein the second set condition is that the mileage of the second stage of self-learning is greater than the third set mileage threshold, and the transport mileage is greater than the fourth set mileage threshold.

[0108] As an example, the total mileage of the second preset self-learning is expressed as S s2 , where S s2 It can be set to no less than 2000km. Of course, it can also be set to other mileages, which are not specifically limited in this application. For each group of high-efficiency power generation intervals, the second stage self-learning mileage S2 is set to no less than 0.1S s2 km, the second stage of self-learning transportation mileage S t2 Set to no less than 0.05S s2 Of course, the second stage of self-learning mileage S2 can also be set to no less than 0.8S s2 km, the second stage of self-learning transportation mileage S t2 It can also be set to no less than 0.04S s2 km, or other mileage, which is not specifically limited in this application.

[0109] In some embodiments, the fuel consumption represents the ratio of the fuel consumption to the mileage during the second stage self-learning process of a certain group of high-efficiency power generation intervals.

[0110] In a possible implementation, for each group of high-efficiency power generation intervals, the corresponding fuel consumption satisfies the conditions shown in the following formula:

[0111]

[0112] Among them, BSFC represents fuel consumption in L / km; ΔC represents the fuel consumption during the second stage of self-learning of a certain group of high-efficiency power generation intervals; S2 represents the second self-learning mileage corresponding to a group of high-efficiency power generation intervals.

[0113] Step 6: In the second stage of self-learning, the first speed, the second speed and the first load in the high-efficiency power generation range corresponding to the minimum fuel consumption are used as the first set speed, the second set speed and the first set load, and the maximum real-time load is used as the second set load.

[0114] As an example, see Figure 4 As shown, the specific implementation steps of the engine high-efficiency power generation area self-learning method provided by this application are as follows:

[0115] S401, learn the maximum speed and the maximum load at different speeds.

[0116] The specific implementation steps are as follows:

[0117] Step 1: Me max The initial value is set to 0Nm, n max The initial value is set to 0 rpm.

[0118] Step 2: Determine the current mileage and current transport mileage of the mixer truck.

[0119] Transport mileage refers to the mileage of the mixer truck’s mixing tank filled with concrete;

[0120] The mileage includes transportation mileage and empty truck mileage, that is, the mileage during which the mixer truck's mixing tank is not filled with concrete.

[0121] Step 3: Continue to detect the real-time accumulated driving mileage and transportation mileage of the mixer truck until the accumulated driving mileage meets the driving mileage S1 of the first stage of self-learning, and the accumulated transportation mileage meets the transportation mileage S1 of the first stage of self-learning. t1 As an example, the accumulated driving mileage and accumulated transportation mileage meet the conditions shown in the following formula:

[0122] ΔS1=S1-S 01

[0123] ΔS t1 =S t1 -S t01

[0124] in:

[0125] ΔS1——Cumulative mileage, unit: km

[0126] ΔS t1 ——Cumulative transport mileage, unit: km

[0127] S1——The current total mileage of the mixer truck after learning, in km;

[0128] S t1 ——The current total transportation mileage of the mixer truck after learning, in km;

[0129] S t01 ——The current total transport mileage of the mixer truck at the beginning of learning, in km;

[0130] S 01 ——The current total mileage of the mixer truck at the beginning of learning, in km;

[0131] Step 4: Collect the real-time engine load value M at all times s, speed value n s The real-time load is compared with the recorded maximum load. If the real-time load is greater than the recorded maximum load, the maximum load value is updated to the real-time load. The real-time speed is compared with the recorded maximum real-time speed value. If the real-time speed is greater than the recorded maximum real-time speed value, the maximum real-time speed value is updated to the real-time speed.

[0132] Step 5: Continue the above process until the following two conditions are met at the same time, then end the learning of the maximum speed and the maximum load at different speeds, and record the final learning value.

[0133] Condition a. Mileage ΔS exceeds S2km;

[0134] Condition b. The system determines the transport mileage ΔS as the transport condition t Greater than 0.5S2km;

[0135] In this application, S s The total mileage of self-learning is preferably driven more than 3 times in each working condition. For example, it is at least 2000 kilometers, and more than 3000 kilometers is preferably recommended. Of course, the longer the better.

[0136] S402, determining a plurality of groups of high-efficiency power generation intervals based on the maximum speed and the maximum loads at different speeds.

[0137] In some embodiments, taking the engine load as the engine torque as an example, after determining the maximum speed and the maximum torque at different speeds, multiple groups of high-efficiency power generation intervals can be determined. As an example, 8 groups of high-efficiency power generation intervals can be determined, as shown in Table 1 below. Of course, more or fewer high-efficiency power generation intervals can also be used, and this application does not specifically limit this.

[0138] Table 1 High efficiency power generation range

[0139] serial number <![CDATA[n d ]]> <![CDATA[n u ]]> <![CDATA[Me d ]]> <![CDATA[Me max ]]> 1 <![CDATA[n d1 ]]> <![CDATA[n u1 ]]> <![CDATA[Me d1 ]]> <![CDATA[Me max1 ]]> 2 <![CDATA[n d1 ]]> <![CDATA[n u1 ]]> <![CDATA[Me d2 ]]> <![CDATA[Me max2 ]]> 3 <![CDATA[n d1 ]]> <![CDATA[n u2 ]]> <![CDATA[Me d1 ]]> <![CDATA[Me max3 ]]> 4 <![CDATA[n d1 ]]> <![CDATA[n u2 ]]> <![CDATA[Me d2 ]]> <![CDATA[Me max4 ]]> 5 <![CDATA[n d2 ]]> <![CDATA[n u1 ]]> <![CDATA[Me d1 ]]> <![CDATA[Me max5 ]]> 6 <![CDATA[n d2 ]]> <![CDATA[n u1 ]]> <![CDATA[Me d2 ]]> <![CDATA[Me max6 ]]> 7 <![CDATA[n d2 ]]> <![CDATA[n u2 ]]> <![CDATA[Me d1 ]]> <![CDATA[Me max7 ]]> 8 <![CDATA[n d2 ]]> <![CDATA[n u2 ]]> <![CDATA[Me d2 ]]> <![CDATA[Me max8 ]]>

[0140] Among them, n d Used to indicate the first speed, n u Used to indicate the second speed, Me d Indicates the first load, Me max Indicates the second load, Me max For maximum load.

[0141] S403, for each group of high-efficiency power generation intervals, determining the fuel consumption when traveling the set transportation mileage and the set driving mileage.

[0142] Step 1: Before the current group of efficient power generation interval setting verification begins, the current mixer truck’s cumulative mileage, mixer truck’s cumulative transportation mileage, and cumulative fuel consumption are assigned to the mixer truck’s cumulative mileage S at the start of learning.02 , transport mileage S t02 , fuel consumption C0.

[0143] Step 2: Continuously monitor the real-time cumulative mileage, cumulative fuel consumption, and cumulative transportation mileage of the mixer truck, and calculate the cumulative mileage, transportation mileage, and fuel consumption during the learning process. When the mixer truck meets the power generation conditions indicated by the high-efficiency power generation interval, it generates power.

[0144] ΔS2=S2-S 02

[0145] ΔS t2 =S t2 --S t02

[0146] ΔC=C-C0

[0147] Where: ΔC——Cumulative fuel consumption during the learning process, unit L; C——Cumulative fuel consumption of the mixer truck after the learning process, unit L; C0——Cumulative fuel consumption of the mixer truck at the beginning of the learning process, unit L; ΔS2——Cumulative mileage, unit km; ΔS t2 ——Accumulated transport mileage, in km; S2——The current total mileage of the mixer truck after learning, in km; S t2 ——The current total transportation mileage of the mixer truck after learning, in km; S t02 ——The current total transportation mileage of the mixer truck at the beginning of learning, in km; S 02 ——The current total mileage of the mixer truck at the beginning of learning, in km.

[0148] Step 3: When the following conditions are met, the fuel consumption test in the current high-efficiency power generation range is terminated;

[0149] a) The driving mileage ΔS2 under the high-efficiency power generation range setting of this group reaches more than S2km;

[0150] b) Transportation mileage ΔS of the transportation condition under the setting of this group of high-efficiency power generation range t2 Greater than 0.5S2km;

[0151] Step 4: Calculate the fuel consumption under the current high-efficiency power generation interval setting and record the fuel consumption (unit: L / 100km);

[0152]

[0153] Step 5: Based on the first speed, the second speed, the first load and the second load in the 2nd to 8th groups of power generation parameter sets, repeat the above steps 1 to 4 until all high-efficiency power generation intervals are verified.

[0154] S404, determining a high-efficiency power generation area based on the fuel consumption, and using power generation parameters in the high-efficiency power generation area as power generation parameters for power generation control.

[0155] Specifically, we can take a group n with the smallest fuel consumption BSFC d 、n u 、Me d and Me max The parameters are used as engine speed and torque threshold conditions for power generation control.

[0156] Based on the same technical concept, see Figure 5 As shown, a power generation control device 500 of an electric upper mounting system of a mixer truck provided in an embodiment of the present application is provided. The device 500 can perform any step of the power generation control method of the electric upper mounting system of a mixer truck, and will not be described here to avoid repetition. The device 500 includes an acquisition unit 501 and a determination unit 502.

[0157] The acquisition unit 501 is used to acquire the engine speed and the engine load when it is determined that the mixer truck is in a driving condition;

[0158] A determination unit 502, configured to control the generator to generate electricity when the speed of the engine and the load of the engine meet the high-efficiency power generation condition;

[0159] Wherein, the efficient power generation condition is:

[0160] The engine speed is greater than a first set speed and less than a second set speed, and the engine load is greater than a first set load and less than a second set load, the first set speed is less than the second set speed, and the first set load is less than the second set load.

[0161] In a possible implementation, the load of the engine is the torque of the engine or the power of the engine.

[0162] In a possible implementation, the high-efficiency power generation condition satisfies the condition shown in the following formula:

[0163]

[0164] n d and n u Satisfy the conditions described in the following formula:

[0165]

[0166] Wherein, n represents the speed of the engine, n d represents the first set speed, n u represents the second set speed, M represents the load of the engine, Md It is used to represent the first set load, M max Used to represent the second set load, M max is the maximum load at the current engine speed, n0 is used to represent the engine idle speed, n max Used to indicate the maximum engine speed.

[0167] In a possible implementation, the acquisition unit 501 is further used to acquire universal characteristic data of the engine;

[0168] The determining unit 502 is further configured to determine, based on the engine speed curve in the universal characteristic data, a first set speed and a second set speed when a set power generation efficiency is satisfied;

[0169] Based on the engine load curve in the universal characteristic data, a first set load and a second set load when a set power generation efficiency is satisfied are determined.

[0170] In a possible implementation, the first set speed, the second set speed, the first set load, and the second set load are obtained through self-learning, and the self-learning step includes:

[0171] Step 1, when the mixer truck is in a driving condition, starting the generator to generate electricity, and recording the self-learning driving mileage and the self-learning transport mileage;

[0172] Step 2: The electric upper body system collects the real-time load M of the engine in real time. s And the real-time speed value n s ;

[0173] Step 3: When the first set condition is met, the first stage of self-learning ends, and the maximum real-time load M obtained during the first stage of self-learning is recorded. s max and the maximum real-time speed value n s max ;

[0174] The first setting condition is that the driving mileage is greater than the first setting mileage threshold, and the transportation mileage is greater than the second setting mileage threshold;

[0175] Step 4: Based on the maximum real-time load M s max and the maximum real-time speed value n s max Set i groups of high-efficiency power generation intervals, each group of high-efficiency power generation intervals includes the first speed n 1i , second speed n 2i and the first load M i ;

[0176] Step 5: Perform the second stage of self-learning for each group of high-efficiency power generation intervals:

[0177] The speed and load of the mixer truck's engine are set based on the high-efficiency power generation interval, and a fuel consumption test is performed. When the second set condition is met, the second stage of self-learning is terminated, and the fuel consumption is recorded; wherein the second set condition is that the mileage of the second stage of self-learning is greater than the third set mileage threshold, and the transportation mileage is greater than the fourth set mileage threshold;

[0178] Step 6: In the second stage of self-learning, the first speed, the second speed and the first load in the high-efficiency power generation range corresponding to the minimum fuel consumption are used as the first set speed, the second set speed and the first set load, and the maximum real-time load is used as the second set load.

[0179] In a possible implementation, the first load is less than the maximum real-time load, and the first speed n 1i Satisfy the conditions shown in the following formula:

[0180] n0<n 1i <1 / 2(n s max -n0)+n0;

[0181] The second speed n 2i Satisfy the conditions shown in the following formula:

[0182] n 2i =n 1i +1 / 2(n s max -n0);

[0183] Wherein, n0 represents the idle speed of the engine.

[0184] In a possible implementation, the judgment condition of the driving condition is: the driving speed is greater than a first speed threshold and the duration is greater than a first set duration;

[0185] The judgment condition of the transportation working condition is: when in the driving working condition, the real-time load of the driving motor is greater than the load threshold and the duration is greater than the second set duration.

[0186] In a possible implementation, the determining unit 502, when controlling the generator to generate electricity, is specifically configured to:

[0187] Acquiring 501 the remaining power of the battery unit by the acquisition unit;

[0188] When the remaining power is greater than a first power threshold, controlling the generator to generate power and supplying the power to the drive motor;

[0189] When the remaining power is less than or equal to the first power threshold, the generator is controlled to generate power to the battery unit and the drive motor.

[0190] In a possible implementation, the acquisition unit 501 is further used to acquire the remaining power of the battery unit when the mixer truck is in a driving condition and does not meet the high-efficiency power generation condition, or when the mixer truck is in a parking condition;

[0191] The determining unit 502 is further configured to control the generator to charge the battery unit if the remaining power is less than a second power threshold, and to stop generating power when the remaining power is greater than or equal to the second power threshold.

[0192] In a possible implementation, the judgment condition of the parking condition is: the driving speed is less than the second speed threshold and the duration is greater than the third set duration.

[0193] Based on the same technical concept, the embodiment of the present application provides an electric upper mounting system for a mixer truck, which can realize the functions of the power generation control device of the electric upper mounting system for a mixer truck discussed above. Please refer to Figure 6 The electric upper installation system 600 includes a memory 601 and a processor 602 .

[0194] Memory 601, used for storing program instructions;

[0195] The processor 602 is used to call the program instructions stored in the memory and execute any step of the power generation control method of the electric upper system of the mixer truck according to the obtained program instructions.

[0196] In the embodiment of the present application, the processor 602 is the control center of the electronic device, which connects various parts of the electronic device using various interfaces and routes, executes various functions of the electronic device and processes data by running or executing software programs / or modules stored in the memory 601, and calling data stored in the memory 601. Optionally, the processor 602 may include one or more processing units. The processor 602, for example, may be a control component such as a processor, a microprocessor, a controller, and may be a general-purpose central processing unit (CPU), a general-purpose processor, a digital signal processing (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.

[0197] The memory 601 can be used to store software programs and modules, and the processor 602 executes various functional applications and data processing by running the software programs and modules stored in the memory 601. The memory 601 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function, etc.; the data storage area may store data created according to business processing, etc. The memory 601, as a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer executable programs and modules. The memory 601 may include at least one type of storage medium, for example, it may include flash memory, hard disk, multimedia card, card-type memory, random access memory (Random Access Memory, RAM), static random access memory (Static Random Access Memory, SRAM), programmable read only memory (Programmable Read Only Memory, PROM), read only memory (Read Only Memory, ROM), electrically erasable programmable read only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), magnetic memory, disk, optical disk, etc. The memory 601 is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 601 in the embodiment of the present application can also be a circuit or any other device that can realize a storage function, for storing program instructions and / or data.

[0198] Based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium comprising: computer instructions, when the computer instructions are executed on a computer, the computer executes any of the power generation control methods for the electric upper mounting system of a mixer truck discussed above. Since the principle of solving the problem by the above-mentioned computer-readable storage medium is similar to the power generation control method for the electric upper mounting system of a mixer truck, the implementation of the above-mentioned computer-readable storage medium can refer to the implementation of the method, and the repeated parts will not be repeated.

[0199] Based on the same inventive concept, the embodiment of the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes any of the power generation control methods for the electric upper mounting system of a mixer truck discussed above. Since the principle of solving the problem by the above computer program product is similar to the power generation control method for the electric upper mounting system of a mixer truck, the implementation of the above computer program product can refer to the implementation of the method, and the repeated parts will not be repeated.

[0200] An embodiment of the present application provides a mixer truck, comprising the above-mentioned electric upper mounting system for the mixer truck.

[0201] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0202] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0203] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0204] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0205] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A power generation control method for an electric upper system of a mixer truck, wherein the mixer truck comprises a chassis and an electric upper system, wherein the chassis comprises an engine, and the electric upper system comprises a generator, a generator controller, a drive motor, a drive motor controller, and a battery unit, wherein the battery unit is electrically connected to the generator and the drive motor, respectively, and the drive motor is used to drive a stirring device, wherein: Control methods include: When it is determined that the mixer truck is in a driving condition, obtaining the speed of the engine and the load of the engine; When the speed of the engine and the load of the engine meet the high-efficiency power generation condition, the generator controller controls the generator to generate electricity; Wherein, the efficient power generation condition is: The engine speed is greater than a first set speed and less than a second set speed, and the engine load is greater than a first set load and less than a second set load, the first set speed is less than the second set speed, and the first set load is less than the second set load.

2. The method according to claim 1, characterized in that The load of the engine is the torque of the engine or the power of the engine.

3. The method according to claim 1 or 2, characterized in that The high efficiency power generation condition satisfies the condition shown in the following formula: n d and n u Satisfy the conditions described in the following formula: Wherein, n represents the speed of the engine, n d represents the first set speed, n u represents the second set speed, M represents the load of the engine, and M d It is used to represent the first set load, M max Used to represent the second set load, M max is the maximum load at the current engine speed, n0 is used to represent the engine idle speed, n max Used to indicate the maximum engine speed.

4. The method according to claim 3, characterized in that The method further comprises: Acquiring universal characteristic data of the engine; Determining, based on the engine speed curve in the universal characteristic data, a first set speed and a second set speed when a set power generation efficiency is satisfied; Based on the engine load curve in the universal characteristic data, a first set load and a second set load when a set power generation efficiency is satisfied are determined.

5. The method according to claim 3, characterized in that The first set speed, the second set speed, the first set load and the second set load are obtained by self-learning, and the self-learning step includes: Step 1, when the mixer truck is in a driving condition, starting the generator to generate electricity, and recording the self-learning driving mileage and the self-learning transport mileage; Step 2: The electric upper body system collects the real-time load M of the engine in real time. s And the real-time speed value n s ; Step 3: When the first set condition is met, the first stage of self-learning is terminated, and the maximum real-time load M obtained during the first stage of self-learning is recorded. smax and the maximum real-time speed value n smax ; The first setting condition is that the driving mileage is greater than the first setting mileage threshold, and the transportation mileage is greater than the second setting mileage threshold; Step 4: Based on the maximum real-time load M smax and the maximum real-time speed value n smax Set i groups of high-efficiency power generation intervals, each group of high-efficiency power generation intervals includes the first speed n 1i , second speed n 2i and the first load M i ; Step 5: Perform the second stage of self-learning for each group of high-efficiency power generation intervals: The speed and load of the mixer truck's engine are set based on the high-efficiency power generation interval, and a fuel consumption test is performed. When the second set condition is met, the second stage of self-learning is terminated, and the fuel consumption is recorded; wherein the second set condition is that the mileage of the second stage of self-learning is greater than the third set mileage threshold, and the transportation mileage is greater than the fourth set mileage threshold; Step 6: In the second stage of self-learning, the first speed, the second speed and the first load in the high-efficiency power generation range corresponding to the minimum fuel consumption are used as the first set speed, the second set speed and the first set load, and the maximum real-time load is used as the second set load.

6. The method according to claim 5, characterized in that The first load is less than the maximum real-time load, and the first speed n 1i Satisfy the conditions shown in the following formula: n0 <n 1i <1 / 2(n smax -n0)+n0; The second speed n 2i Satisfy the conditions shown in the following formula: a 2i =n 1i +1 / 2(n smax -n0); Wherein, n0 represents the idle speed of the engine.

7. The method according to claim 5 or 6, characterized in that The judgment condition of the driving condition is: the driving speed is greater than the first speed threshold and the duration is greater than the first set duration; The judgment condition of the transportation working condition is: when in the driving working condition, the real-time load of the driving motor is greater than the load threshold and the duration is greater than the second set duration.

8. The method according to claim 1, characterized in that The generator controller controls the generator to generate electricity, including: Obtaining the remaining power of the battery unit; When the remaining power is greater than a first power threshold, the generator controller controls the generator to generate power and provide it to the drive motor; When the remaining power is less than or equal to the first power threshold, the generator controller controls the generator to generate power for the battery unit and the drive motor.

9. The method according to claim 1, characterized in that The method further comprises: When the mixer truck is in a driving condition and does not meet the high-efficiency power generation condition, or when the mixer truck is in a parking condition, obtaining the remaining power of the battery unit; If the remaining power is less than a second power threshold, the generator is controlled to charge the battery unit until the remaining power is greater than or equal to the second power threshold and power generation is stopped.

10. The method according to claim 9, characterized in that The judgment condition of the parking condition is: the driving speed is less than the second speed threshold and the duration is greater than the third set duration.

11. An electric loading system for a mixer truck, characterized in that: include: A memory for storing program instructions; A processor is used to obtain program instructions in the memory and implement the method according to any one of claims 1 to 10 according to the obtained program instructions.

12. A mixer truck, characterized in that: It comprises the electric upper mounting system of a mixer truck as claimed in claim 11.

Images