CN103707889A - Method of controlling power of hybrid electric vehicle - Google Patents

Method of controlling power of hybrid electric vehicle Download PDF

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Publication number
CN103707889A
CN103707889A CN201310178474.0A CN201310178474A CN103707889A CN 103707889 A CN103707889 A CN 103707889A CN 201310178474 A CN201310178474 A CN 201310178474A CN 103707889 A CN103707889 A CN 103707889A
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China
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described
electric quantity
battery electric
threshold values
speed
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CN201310178474.0A
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Chinese (zh)
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CN103707889B (en
Inventor
陈熙熙
姜娜
马厚元
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上海埃士工业科技有限公司
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Publication of CN103707889A publication Critical patent/CN103707889A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/24Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
    • B60W10/26Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • B60W20/40Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00Input parameters relating to a particular sub-units
    • B60W2510/24Energy storage means
    • B60W2510/242Energy storage means for electrical energy
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00Input parameters relating to overall vehicle dynamics
    • B60W2520/10Longitudinal speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00Input parameters relating to overall vehicle dynamics
    • B60W2520/10Longitudinal speed
    • B60W2520/105Longitudinal acceleration

Abstract

The invention provides a method of controlling power of a hybrid electric vehicle. The method includes: acquiring speed, acceleration, required torque and battery level information of a vehicle during running; determining a power mode to use according to the speed, acceleration, required torque, and battery level; preferably, when both the acceleration and the required torque are larger than or equal to zero, determining a power mode to use according to the speed, battery level and required torque; when the acceleration or required torque is smaller than zero, determining a power mode to use just according to the battery level. Through the application of the method, real-time running conditions of the vehicle can be more accurately judged, two drive powers can be controlled to better coordinate on the basis of comprehensively-monitored real-time vehicle running conditions, fuel efficiency is higher, emission is lower, and better driving performance can be obtained.

Description

A kind of method of controlling hybrid electric vehicle power

Technical field

The present invention relates to a kind of method of controlling automobile power, particularly relate to a kind of method of controlling hybrid electric vehicle power.

Background technology

In the last more than ten years in 20th century, develop more energy-conservation, more environmental protection, use the new automobile of alternative energy, become the task of top priority of Ge great car company.Hybrid vehicle has been taken into account electronlmobil and orthodox car advantage, because it has the potentiality of low oil consumption, anti-emission carburetor, dynamic property is close to orthodox car, and productive costs is lower than pure electric automobile, its research and development recent years become a study hotspot of Ge great car company, research institution and university in the world.

Mixed power electric car generally has two kinds of onboard power source at least, wherein a kind of for having the energy source of high power density.Utilize the characteristic of two kinds of energy sources complementary, realize improving of Full Vehicle System performance.Realize co-ordination mutually between the two, this just need to have good control method.Control method not only will realize the fuel economy of car load the best, but also to take into account many-sided requirements such as driving engine discharge, battery age, driving performance, each part reliability and integral vehicle cost, and for the characteristic of each parts of hybrid vehicle and the operating condition of automobile, make driving engine, electrical motor, storage battery and driving system realize optimum matching.The control method of current hybrid vehicle is very imperfect, and surface judges inaccurate in insufficient causing of the variable collection in the real time status travelling of vehicle to the real time status that travels on the one hand.On the other hand, the Vehicle Driving Cycle real time data collecting is utilized insufficient unreasonable, such as control method common in prior art has two kinds, a kind of is according to the speed of a motor vehicle, when the speed of a motor vehicle is greater than threshold values, uses engine drive; When the speed of a motor vehicle is less than threshold values, use battery-operated.Another kind is according to battery electric quantity, when battery electric quantity is less than a certain threshold values, uses engine drive; When battery electric quantity is greater than threshold values, use battery-operated.Existing control method all cannot make two kinds of power coordinate better, and then waste fuel, causes that more discharges and driveability are bad.

Summary of the invention

The problems such as the shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of control method of hybrid vehicle, inaccurate to driving condition judgement for solving existing control method, and many power coordinates, coupling is not good.Control method of the present invention is monitored real time status and the energy requirement to power system in vehicle traveling process more fully, and the horsepower output of dynamic assignment driving engine and electric motor system reasonably, reaches better fuel economy, lower discharge, lower system cost and the driveability of Geng Jia.

For achieving the above object and other relevant objects, the invention provides a kind of method of controlling hybrid electric vehicle power, comprising: speed of a motor vehicle when collection vehicle is travelled, acceleration/accel, demand torque and battery electric quantity information; According to the speed of a motor vehicle, acceleration/accel, demand torque and battery electric quantity, determine the dynamic mode using.

Preferably, in the method for above-mentioned control hybrid electric vehicle power, when acceleration/accel and demand torque are all more than or equal to zero, according to the speed of a motor vehicle, battery electric quantity and demand torque, determine the dynamic mode using; When acceleration/accel or demand torque are less than zero, according to battery electric quantity, determine the dynamic mode using.

As mentioned above, the method for control hybrid electric vehicle power of the present invention, has following beneficial effect: the real time status judgement to Vehicle Driving Cycle is more accurate more comprehensively.

And according to the preferred embodiment of the present invention, the Vehicle Driving Cycle that can arrive based on comprehensive monitoring is carried out situation, controls two kinds of driving power and coordinate better, thus more fuel-efficient, more better driveability is discharged and obtains in lowland.

Accompanying drawing explanation

Fig. 1 is shown as the block diagram of hybrid power automobile power system;

Fig. 2 is shown as the diagram of circuit of the embodiment of the present invention.

The specific embodiment

Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification sheets.The present invention can also be implemented or be applied by the other different specific embodiment, and the every details in this specification sheets also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.

First consult Fig. 1, Figure 1 shows that the power system block diagram of hybrid vehicle.In figure, inductor comprises speed of a motor vehicle inductor, acceleration induction device, moment of torsion inductor and battery electric quantity inductor, is respectively used to monitor and gather the information such as the speed of a motor vehicle, acceleration/accel, the moment of torsion needing and battery electric quantity, and the information collecting is passed to control module.Control module is according to collecting the control policy of information and setting, and control engine, battery (comprising drive motor) coordinate for drive wheel provides power, and controls thermoelectric converter and electromechanical transducer is that battery charges.Wherein, driving engine can be any combustion engine; Battery (comprising drive motor) represents any electric propulsion system that is applicable to hybrid vehicle; Thermoelectric converter is electric energy for thermal power transfer; Electromechanical transducer is for converting mechanical energy to electric energy.

Consult again Fig. 2, according to the method for control hybrid electric vehicle power of the present invention, step S1 represents to pass through inductor, gather in real time moment of torsion and the battery electric quantity information of the speed of a motor vehicle, acceleration/accel, needs, step S2 represents to determine to use which kind of dynamic mode according to the moment of torsion of the speed of a motor vehicle, acceleration/accel, needs and battery electric quantity information.

Introduce in detail below in step S2, according to the speed of a motor vehicle, acceleration/accel, the moment of torsion needing and battery electric quantity information, determine a kind of preferred implementation of dynamic mode.

For making introduction convenient, clear, below mark and term are arranged as table 1:

Table 1

Wherein, usually:

(1)V min<V low;

(2)SOC min<SOC low<SOC high

Below in conjunction with table 2, according to the speed of a motor vehicle, acceleration/accel, the moment of torsion needing and battery electric quantity information, determine a kind of preferred implementation of dynamic mode, table 2 is as follows:

In this example, collect after the speed of a motor vehicle, acceleration/accel, the moment of torsion needing and battery electric quantity information, first judge acceleration/accel and demand torque, if acceleration/accel dv/dt and demand torque T reqall be more than or equal to zero, according to vehicle velocity V, battery electric quantity SOC and demand torque T reqdetermine the dynamic mode using, the capable a kind of method that provides decision of 1-3 in table 2; If acceleration/accel dv/dt or demand torque T reqbe less than zero, only according to battery electric quantity SOC, determine the dynamic mode using, in table 2, the 4th row has provided a kind of method of decision.

Consult the 1st row in table 2, when judging acceleration/accel dv/dt and demand torque T reqwhile being all more than or equal to zero, judgement vehicle velocity V, if vehicle velocity V is less than or equal to threshold values V min, carry out the condition judgment 1 of the 1st row, further judge battery electric quantity SOC, otherwise forward the 2nd row judgement to.If need to carry out the condition judgment 1 of the 1st row, execution result is that battery electric quantity SOC is more than or equal to SOC low, determine to use electric-only mode; If battery electric quantity SOC is less than threshold values SOC low, determine to use pure engine mode.

And as acceleration/accel dv/dt and demand torque T reqall be more than or equal to zero, but vehicle velocity V is greater than threshold values V mintime, torque T according to demand reqdetermine the dynamic mode using, the capable a kind of method that provides decision of 2-3 in table 2 with battery electric quantity SOC.

Consult the 2nd row in table 2, as acceleration/accel dv/dt and demand torque T reqall be more than or equal to zero, but vehicle velocity V is greater than threshold values V mintime, further judge whether vehicle velocity V is less than or equal to the second threshold values V lowif vehicle velocity V is less than or equal to the second threshold values V low, carry out the condition judgment 1 in the 2nd row, judgement demand torque T req, otherwise forward the 3rd row judgement to.If need to carry out the condition judgment 1 of the 2nd row, and draw demand torque T reqbe less than or equal to drive motor torque peak T em_max, judge battery electric quantity SOC, if battery electric quantity SOC is more than or equal to threshold values SOC low, determine to use electric-only mode; If battery electric quantity SOC is less than described threshold values SOC low, determine to use pure engine mode; If demand torque T reqbe greater than drive motor torque peak T em_max, judge battery electric quantity SOC, if battery electric quantity SOC is more than or equal to described threshold values SOC low, determine to use hybrid mode; If battery electric quantity SOC is less than threshold values SOC low, determine to use pure engine mode.

Consult the 3rd row in table 2, the 3rd line display is as acceleration/accel dv/dt and demand torque T reqall be more than or equal to zero, the speed of a motor vehicle is greater than the second threshold values V lowsituation, now need to judge demand torque T reqwhether belong to engine optimum operation torque scope, if demand torque T reqbelong to engine optimum operation torque scope (comprising endpoint value), directly carry out the condition judgment 3 of the 3rd row, judgement battery electric quantity SOC, if battery electric quantity SOC is more than or equal to threshold values SOC min, determine to use pure engine mode; If battery electric quantity SOC is less than threshold values SOC min, determine to use engine charging pattern.

If demand torque T reqdo not belong to engine optimum operation torque scope, carry out the condition judgment 2 and 3 of the 3rd row.Particularly, if demand torque T reqbe less than engine optimum operation torque scope low value T iCE_opt_low, judgement battery electric quantity SOC, if battery electric quantity SOC is less than battery electric quantity ceiling value SOC high, determine to use engine charging pattern; If battery electric quantity SOC is more than or equal to battery electric quantity ceiling value SOC high, determine to use electric-only mode.If demand torque T reqbe greater than the high value T of engine optimum operation torque scope iCE_opt_highand be less than engine torque maximum of T iCT_max, judgement battery electric quantity SOC, if battery electric quantity SOC is more than or equal to the low limit value SOC of battery electric quantity low, determine to use hybrid mode; If battery electric quantity SOC is less than the low limit value SOC of battery electric quantity low, determine to use pure engine mode.If demand torque T reqbe greater than maximum engine torque, judgement battery electric quantity SOC, if battery electric quantity SOC is more than or equal to the low limit value SOC of battery electric quantity low, determine to use hybrid mode; If battery electric quantity SOC is less than the low limit value SOC of battery electric quantity low, determine to use pure engine mode.

In table 2, the 4th row is as acceleration/accel dv/dt or demand torque T reqwhile being less than zero, according to battery electric quantity SOC, determine to use the method for which kind of dynamic mode.Particularly, as acceleration/accel dv/dt or demand torque T reqwhile being less than zero, represent that automobile is in braking mode.Now, if battery electric quantity SOC is less than battery electric quantity ceiling value SOC high, determining to use energy take-back model, it is that battery charges that the thermal power transfer by thermoelectric conversion device, brake device for car being produced becomes electric energy; If battery electric quantity SOC is more than or equal to battery electric quantity ceiling value SOC high, use common braking mode.

In above-mentioned embodiment, V min, V low, SOC lowand SOC highneed to set according to the difference of vehicle, vehicle condition, to reach optimized effect.Matlab emulation experiment shows, applies the invention described above embodiment the power of hybrid vehicle is controlled, and compares with existing mode, and under equal acceleration capability, equal velocity conditions, 10%-20% has been saved in per 100 km oil consumption.

It should be noted that above-described embodiment only for purpose of explanation, and not should be understood to limitation of the present invention.In practical application, those skilled in the art can as required, carry out necessary change or simplification to above-mentioned embodiment.Such as but not limited to, omit V min, V low, SOC lowand SOC highone or several in value, the control logic shown in his-and-hers watches 2 is simplified accordingly simultaneously; Or the priority ranking of the control logic shown in map table 2, judges battery electric quantity but not acceleration/accel etc. such as preferential.

In sum, the present invention is more accurate more comprehensively to the real time status judgement of Vehicle Driving Cycle.And according to the preferred embodiment of the present invention, the Vehicle Driving Cycle that can arrive based on comprehensive monitoring is carried out situation, controls two kinds of driving power and coordinate better, thus more fuel-efficient, more better driveability is discharged and obtains in lowland.So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.

Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.

Claims (6)

1. a method of controlling hybrid electric vehicle power, is characterized in that, described method comprises:
Speed of a motor vehicle when collection vehicle is travelled, acceleration/accel, demand torque and battery electric quantity information;
According to the speed of a motor vehicle, acceleration/accel, demand torque and battery electric quantity, determine dynamic mode.
2. the method for control hybrid electric vehicle power according to claim 1, is characterized in that, the step of the described dynamic mode using according to the speed of a motor vehicle, acceleration/accel, demand torque and battery electric quantity decision comprises:
When described acceleration/accel and described demand torque are all more than or equal to zero, according to the described speed of a motor vehicle, described battery electric quantity and described demand torque, determine dynamic mode;
When described acceleration/accel or described demand torque are less than zero, according to described battery electric quantity, determine dynamic mode.
3. the method for control hybrid electric vehicle power according to claim 2, is characterized in that, described when acceleration/accel and demand torque are all more than or equal to zero, judges the described speed of a motor vehicle:
When the described speed of a motor vehicle is less than or equal to the first speed of a motor vehicle threshold values, only according to described battery electric quantity, determine dynamic mode;
When the described speed of a motor vehicle is greater than described the first speed of a motor vehicle threshold values, according to described demand torque and described battery electric quantity, determine dynamic mode.
4. the method for control hybrid electric vehicle power according to claim 3, it is characterized in that, described when the described speed of a motor vehicle is less than or equal to the first speed of a motor vehicle threshold values, judge described battery electric quantity, if described battery electric quantity is more than or equal to described the first electric weight threshold values, determine to use electric-only mode; If described battery electric quantity is less than described the first electric weight threshold values, determine to use pure engine mode.
5. the method for control hybrid electric vehicle power according to claim 4, is characterized in that, described when the speed of a motor vehicle is greater than the first speed of a motor vehicle threshold values, further judges whether the described speed of a motor vehicle is less than or equal to the second speed of a motor vehicle threshold values;
When the described speed of a motor vehicle is greater than described the first speed of a motor vehicle threshold values and is less than or equal to described the second speed of a motor vehicle threshold values, judge described demand torque: if described demand torque is less than or equal to drive motor torque peak, judge described battery electric quantity, if described battery electric quantity is more than or equal to described the first electric weight threshold values, determine to use electric-only mode; If described battery electric quantity is less than described the first electric weight threshold values, determine to use pure engine mode;
If described demand torque is greater than described drive motor torque peak, judge described battery electric quantity, if described battery electric quantity is more than or equal to described the first electric weight threshold values, determine to use hybrid mode; If described battery electric quantity is less than described the first electric weight threshold values, determine to use pure engine mode;
When the described speed of a motor vehicle is greater than described the second speed of a motor vehicle threshold values, judge described demand torque:
If described demand torque falls into engine optimum operation torque scope, judge described battery electric quantity, if described battery electric quantity is more than or equal to the second electric weight threshold values, determine to use pure engine mode; If described battery electric quantity is less than described the second electric weight threshold values, determine to use engine charging pattern;
If described demand torque does not fall into described engine optimum operation torque scope, further judge described demand torque:
If described demand torque is less than the low value of described engine optimum operation torque scope, judge described battery electric quantity, if described battery electric quantity is more than or equal to the 3rd electric weight threshold values, determine to use engine charging pattern; If described battery electric quantity is less than described the 3rd electric weight threshold values, determine to use electric-only mode; If described demand torque is greater than the high value of described engine optimum operation torque scope and is less than maximum engine torque, judge described battery electric quantity, if described battery electric quantity is more than or equal to described the second electric weight threshold values, determine to use hybrid mode; If described battery electric quantity is less than described the second electric weight threshold values, determine to use pure engine mode; If described demand torque is greater than described maximum engine torque, judge described battery electric quantity, if described battery electric quantity is more than or equal to described the second electric weight threshold values, determine to use hybrid mode; If described battery electric quantity is less than described the second electric weight threshold values, determine to use pure engine mode.
6. the method for control hybrid electric vehicle power according to claim 1, it is characterized in that, described when described acceleration/accel or described demand torque are less than zero, judge described battery electric quantity, if described battery electric quantity is less than described the 3rd electric weight threshold values, determine to use energy take-back model; If described battery electric quantity is more than or equal to described the 3rd electric weight threshold values, determine to use braking mode.
CN201310178474.0A 2013-05-15 2013-05-15 A kind of method controlling hybrid electric vehicle power CN103707889B (en)

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CN105922986B (en) * 2016-05-24 2018-10-16 北京新能源汽车股份有限公司 Stroke-increasing electric automobile and its mode switch control method and system
CN105922986A (en) * 2016-05-24 2016-09-07 北京新能源汽车股份有限公司 Stroke-increasing type electric automobile and mode switching control method and system thereof
WO2018010598A1 (en) * 2016-07-15 2018-01-18 联合汽车电子有限公司 Energy management method for hybrid vehicle, terminal device, and server
CN107662603A (en) * 2016-07-29 2018-02-06 德州学院 A kind of battery management system of mixed power electric car
CN107097774A (en) * 2017-04-13 2017-08-29 重庆大学 The energy distributing method of parallel type hybrid vehicle
CN109353328A (en) * 2018-09-28 2019-02-19 潍柴动力股份有限公司 A kind of hybrid power control method, system and mixer truck

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