CN111959483B - Control method and device and vehicle - Google Patents
Control method and device and vehicle Download PDFInfo
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- CN111959483B CN111959483B CN202010642146.1A CN202010642146A CN111959483B CN 111959483 B CN111959483 B CN 111959483B CN 202010642146 A CN202010642146 A CN 202010642146A CN 111959483 B CN111959483 B CN 111959483B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W20/00—Control systems specially adapted for hybrid vehicles
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Abstract
The invention provides a control method, a control device and a vehicle, which are applied to a series hybrid electric vehicle with an engine, wherein the method comprises the following steps: determining a required power of the engine based on a driving power of the hybrid vehicle; correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine; when the target required power is larger than the upper power limit threshold, the engine is controlled to be in a starting state, so that the engine of the vehicle can be kept in a starting state without considering SOC (state of charge), along with the power requirement of the whole vehicle, under the condition that the engine is required to be in the starting state, the power battery is effectively prevented from continuously discharging with high power, the service life of the battery can be prolonged, the charging and discharging efficiency of the battery can be increased, and the energy consumption of the whole vehicle is prevented from being influenced.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a control method, a control device and a vehicle.
Background
In the field of automobiles, with the development of new energy, the new energy has become a great trend to replace traditional energy, and the rapid development of new energy automobiles also becomes a necessary way for development.
The control strategy in the series hybrid vehicle adopts a control strategy Of a multi-point working condition mode, wherein the engine is started when the State Of Charge (SOC) Of the power battery is lower than a lower threshold value, and the engine is shut down when the SOC is higher than an upper threshold value.
However, the control strategy of the multi-point operating mode does not consider the influence caused by the power demand of the engine, for example, when the SOC is greater than the upper limit threshold, the vehicle needs a larger power to continuously climb the slope, but the engine is in the off state at this time, which causes the continuous high-power discharge of the power battery, shortens the battery life, and further influences the energy consumption of the entire vehicle.
Disclosure of Invention
In view of the above, the present invention aims to provide a control method, a control device and a vehicle, so as to solve the problem that the influence of the required power of the engine is not considered in the existing control strategy of the multi-point operating mode, which causes the continuous high-power discharge of the power battery, shortens the battery life, and further influences the energy consumption of the whole vehicle of the vehicle.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a control method applied to a series hybrid vehicle having an engine, the method including:
determining a required power of the engine based on a driving power of the hybrid vehicle;
correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine;
and controlling the engine to be in a starting state when the target required power is larger than a power upper limit threshold.
Optionally, after the correction processing is performed on the required power according to the power battery state of charge value to obtain the target required power of the engine, the method further includes:
when the target required power is smaller than a power lower limit threshold value and the state of charge value of the power battery is within a preset power battery state of charge value range, acquiring a previous working state of the engine closest to the current time;
and controlling the engine to be in the previous working state.
Optionally, after the correction processing is performed on the required power according to the power battery state of charge value to obtain the target required power of the engine, the method further includes:
and when the target required power is within a preset required power range and the state of charge value of the power battery is greater than the lower limit threshold of the state of charge of the power battery, controlling the engine to be in the corresponding previous working state.
Optionally, after the correction processing is performed on the required power according to the power battery state of charge value to obtain the target required power of the engine, the method further includes:
and when the target required power is smaller than a lower power limit threshold and the state of charge value of the power battery is larger than a preset upper power battery state of charge threshold, controlling the engine to be in a closed state.
Optionally, after the correction processing is performed on the required power according to the power battery state of charge value to obtain the target required power of the engine, the method further includes:
and when the target required power is smaller than the lower power limit threshold and the state of charge value of the power battery is smaller than a preset lower power battery state of charge threshold, controlling the engine to be in the starting state.
In a second aspect, an embodiment of the present invention provides a control apparatus applied to a series hybrid vehicle having an engine, the apparatus including:
the determination module is used for determining the required power of the engine based on the driving power of the hybrid electric vehicle;
the correction module is used for correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine;
the first control module is used for controlling the engine to be in a starting state when the target required power is larger than a power upper limit threshold value.
Optionally, the apparatus further comprises:
the second control module is used for acquiring the previous working state of the engine closest to the current time when the target required power is smaller than a power lower limit threshold and the state of charge value of the power battery is within a preset power battery state of charge value range;
and the third control module is used for controlling the engine to be in the previous working state.
Optionally, the apparatus further comprises:
and the fourth control module is used for controlling the engine to be in the corresponding previous working state when the target required power is in a preset required power range and the state of charge value of the power battery is greater than the lower limit threshold of the state of charge of the power battery.
Optionally, the apparatus further comprises:
and the fifth control module is used for controlling the engine to be in a closed state when the target required power is smaller than a lower power limit threshold and the state of charge value of the power battery is larger than a preset upper power battery state of charge threshold.
In a third aspect, an embodiment of the present invention provides a vehicle including the control apparatus according to any one of the second aspects.
Compared with the prior art, the embodiment of the invention has the following advantages:
the control method provided by the embodiment of the invention determines the required power of the engine based on the driving power of the hybrid electric vehicle, corrects the required power according to the state of charge value of the power battery to obtain the target required power of the engine, and controls the engine to be in the starting state when the target required power is greater than the upper power limit threshold value, so that the engine of the vehicle can keep the engine in the starting state without considering the SOC along with the power requirement of the whole vehicle under the condition that the engine is required to be in the starting state, thereby effectively preventing the power battery from continuously discharging with high power, prolonging the service life of the battery, increasing the charging and discharging efficiency of the battery and avoiding influencing the energy consumption of the whole vehicle.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram illustrating a conventional engine on/off control provided by an embodiment of the present invention;
FIG. 2 is a flow chart illustrating steps of a control method according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating steps of a control method according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an engine on/off control provided by an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a control device according to a third embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The control strategy of the series hybrid electric vehicle not only influences the fuel economy and the emission capacity of the whole vehicle, but also has great influence on the service life of a power battery. The control strategy of the prior series hybrid vehicle mainly comprises the following steps: single-operating-point mode, multi-operating-point mode, and power-accompanying mode. Single operating point modes have been eliminated basically, and multi-operating point modes and power accompanying modes are applied more in practice. In the power accompanying modes, targets such as economy and emission are achieved by increasing an SOC secondary judgment threshold point, refining engine output power limiting conditions and the like on the basis Of an upper limit power battery State Of Charge (SOC) threshold and a lower limit SOC threshold triggering condition. As the industry develops more and more mature, the control logics are improved, and model parameters are effectively optimized and identified on line.
At present, a control method of a multi-point working condition mode is adopted, and the control strategy of starting and stopping the engine can be described by using the following steps of 1: the horizontal axis represents Engine Power (Engine Power), the vertical axis represents SOC, the Engine is started (ON) when SOC is lower than a lower limit threshold (SOC _ lo), the Engine is shut OFF (OFF) when SOC is higher than an upper limit threshold (SOC _ hi), and the Engine is maintained in a current state (KEEP) between the lower limit threshold and the upper limit threshold. The disadvantage of this strategy is that the effect of the power demand of the engine is not taken into account. For example, when the SOC is greater than the upper limit threshold, the vehicle needs a large amount of power to continuously climb the slope, and the engine is not turned on, which may cause the continuous large-power discharge of the power battery and shorten the battery life. In addition, the energy consumption is analyzed from the perspective of energy consumption, the consumed energy comes from the battery, and the part of energy needs to be supplemented by the power generation device sooner or later, so that the charging and discharging efficiency of the battery needs to be considered, and the energy consumption of the whole vehicle is further influenced.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 2, a flowchart illustrating steps of a control method according to an embodiment of the present invention, which may be applied to a series hybrid vehicle having an engine, is shown.
As shown in fig. 2, the control method may specifically include the following steps:
step 101: the required power of the engine is determined based on the driving power of the hybrid vehicle.
In the present invention, the driving power of the hybrid vehicle is bus required power (Pwr _ bus) preset by engine emission, engine efficiency, Noise, Vibration and Harshness (NVH), generator efficiency and other factors. The corresponding desired torque (Trq _ desired) may be calculated in conjunction with the desired rotational speed (Spd _ desired) corresponding to the bus required power (Pwr _ bus), the generator output power (Pwr _ out) may be further calculated based on the desired torque (Trq _ desired), and then the required power (Pwr _ desired) of the engine may be finally calculated in consideration of the efficiency of the generator device itself.
After the required power of the engine is determined based on the driving power of the hybrid vehicle, step 102 is executed.
Step 102: and correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine.
In the present invention, the State Of Charge (SOC) Of the power battery refers to the amount Of remaining power Of the power battery. The correlation coefficient of the power battery state of charge value correction can be as follows: (0.5: (SOC _ hi + SOC _ lo) -SOC)/(0.5: (SOC _ hi-SOC _ lo), where SOC _ hi represents an upper limit threshold and SOC _ lo represents a lower limit threshold, and the correction coefficient is for correcting the SOC to be around the middle of SOC _ hi and SOC _ lo, and the required power of the engine obtained as described above is corrected based on the SOC, and specifically, the target required power (Pwr _ demand _ SOC) of the engine can be calculated according to the formula (1):
pwr _ demand _ SOC ═ Pwr _ demand + Pwr _ chg (0.5 × (SOC _ hi + SOC _ lo) -SOC)/(0.5 × (SOC _ hi-SOC _ lo) equation (1), where Pwr _ demand represents the required power of the engine, Pwr _ chg represents the charging power of the engine, SOC _ hi represents the upper limit threshold, SOC _ lo represents the lower limit threshold, and SOC represents the power battery state of charge value.
After the required power is corrected according to the state of charge value of the power battery to obtain the target required power of the engine, step 103 is executed.
Step 103: and controlling the engine to be in a starting state when the target required power is larger than the upper power limit threshold.
In the present invention, when the target required Power is greater than the upper Power threshold (Power _ hi), that is, the maximum battery capacity cannot meet the target required Power on the bus, at this time, the engine is turned on no matter what the SOC is. For example, when the SOC is greater than the upper limit threshold, the vehicle needs a large amount of power to continuously climb the slope, and the engine keeps the engine in an on state without considering the SOC, so that continuous high-power discharge of the power battery is avoided, and the service life of the battery can be prolonged. In addition, the energy consumption angle is used for analysis, the charging and discharging efficiency of the battery can be increased, and the influence on the energy consumption of the whole vehicle is avoided.
The upper threshold (Power _ hi) is a minimum working threshold (lower threshold) of 1.35 times of the engine, the coefficient is set according to whether the maximum capacity of the battery is smaller than a required Power point on the bus, and the actual condition needs to be calibrated.
The control method provided by the embodiment of the invention determines the required power of the engine based on the driving power of the hybrid electric vehicle, corrects the required power according to the state of charge value of the power battery to obtain the target required power of the engine, and controls the engine to be in the starting state when the target required power is greater than the upper power limit threshold value, so that the engine of the vehicle can keep the engine in the starting state without considering the SOC along with the power requirement of the whole vehicle under the condition that the engine is required to be in the starting state, thereby effectively preventing the power battery from continuously discharging with high power, prolonging the service life of the battery, increasing the charging and discharging efficiency of the battery and avoiding influencing the energy consumption of the whole vehicle.
Referring to fig. 3, a flowchart showing steps of a control method according to a second embodiment of the present invention, which can be applied to a series hybrid vehicle having an engine, is shown.
As shown in fig. 3, the control method may specifically include the following steps:
step 201: the required power of the engine is determined based on the driving power of the hybrid vehicle.
In the present invention, the driving power of the hybrid vehicle is bus required power (Pwr _ bus) preset by engine emission, engine efficiency, Noise, Vibration and Harshness (NVH), generator efficiency and other factors. The corresponding desired torque (Trq _ desired) may be calculated in conjunction with the desired rotational speed (Spd _ desired) corresponding to the bus required power (Pwr _ bus), the generator output power (Pwr _ out) may be further calculated based on the desired torque (Trq _ desired), and then the required power (Pwr _ desired) of the engine may be finally calculated in consideration of the efficiency of the generator device itself.
After the required power of the engine is determined based on the driving power of the hybrid vehicle, step 202 is executed.
Step 202: and correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine.
In the present invention, the State Of Charge (SOC) Of the power battery refers to the amount Of remaining power Of the power battery. The correlation coefficient of the power battery state of charge value correction can be as follows: (0.5 × (SOC _ hi + SOC _ lo) -SOC)/(0.5 × (SOC _ hi-SOC _ lo), where SOC _ hi represents an upper limit threshold value and SOC _ lo represents a lower limit threshold value, then the required power of the engine obtained as described above is corrected based on the SOC, and specifically, the target required power (Pwr _ demand _ SOC) of the engine may be calculated according to equation (1):
pwr _ demand _ SOC ═ Pwr _ demand + Pwr _ chg (0.5 × (SOC _ hi + SOC _ lo) -SOC)/(0.5 × (SOC _ hi-SOC _ lo) equation (1), where Pwr _ demand represents the required power of the engine, Pwr _ chg represents the charging power of the engine, SOC _ hi represents the upper limit threshold, SOC _ lo represents the lower limit threshold, and SOC represents the power battery state of charge value.
The correction coefficient aims to ensure that the SOC is positioned near the middle value of the SOC-hi and the SOC-lo, can avoid the continuous high-power discharge of the battery, can also ensure that the energy required by the driving motor can be directly supplied by an English power generation device, and the redundant part of the energy is charged by the battery, can improve the utilization rate of the capacity,
it should be noted that, if the target required Power (Pwr _ demand _ soc) of the engine is lower than the minimum threshold Power (Power _ lo) of the engine, the engine is operated at the minimum threshold Power value.
If the target required Power (Pwr _ demand _ SOC) of the engine is higher than the minimum threshold Power (Power _ lo) of the engine, the SOC is smaller than the SOC _ lo, and the target required Power of the engine is larger than the maximum dischargeable energy of the Power battery, the engine is operated at the highest Power threshold value.
In addition, the change in engine power increase should be less than or equal to the maximum power meter loading slope (max _ pwr _ rise _ rate), and the rate of change in engine power decrease should also be less than or equal to the minimum power loading slope (min _ pwr _ rise _ rate).
After the required power is corrected according to the state of charge value of the power battery to obtain the target required power of the engine, step 203, step 204, step 205, step 206 or step 207 is executed.
Step 203: and controlling the engine to be in a starting state when the target required power is larger than the upper power limit threshold.
In the present invention, when the target required Power is greater than the upper Power threshold (Power _ hi), that is, the maximum battery capacity cannot meet the target required Power on the bus, at this time, the engine is turned on no matter what the SOC is. For example, when the SOC is greater than the upper limit threshold, the vehicle needs a large amount of power to continuously climb the slope, and the engine keeps the engine in an on state without considering the SOC, so that continuous high-power discharge of the power battery is avoided, and the service life of the battery can be prolonged. In addition, the energy consumption angle is used for analysis, the charging and discharging efficiency of the battery can be increased, and the influence on the energy consumption of the whole vehicle is avoided.
Referring to fig. 4, a schematic diagram of an Engine ON-OFF control according to an embodiment of the present invention is shown, as shown in fig. 4, a horizontal axis represents Engine Power (Engine Power), a vertical axis represents SOC, SOC _ lo represents a lower limit threshold, SOC _ hi represents an upper limit threshold, Power _ hi represents an upper Power limit threshold, Power _ lo represents a lower Power limit threshold, KEEP represents that an Engine is in a current state, ON represents that the Engine is in a start state, and OFF represents that the Engine is in an OFF state.
The upper Power threshold (Power _ hi) is 1.35 times of the minimum operating threshold (lower threshold) of the engine (Power _ lo), and the coefficient is set according to whether the maximum capacity of the battery is smaller than the required Power point on the bus or not, and the actual condition needs to be calibrated.
Step 204: when the target required power is smaller than a power lower limit threshold and the state of charge value of the power battery is within a preset state of charge value range of the power battery, acquiring a previous working state of the engine closest to the current time; and controlling the engine to be in the previous working state.
Alternatively, referring to fig. 4, when the target required Power is less than Power _ lo and the SOC is between SOC _ hi and SOC _ lo, the operating state of the engine and the previous operating state are kept consistent.
Step 205: and when the target required power is in a preset required power range and the state of charge value of the power battery is greater than the lower limit threshold of the state of charge of the power battery, controlling the engine to be in a corresponding previous working state.
Alternatively, referring to fig. 4, when the target required Power is between Power _ lo and Power _ hi and the SOC value is greater than SOC _ lo, the operating state of the engine is kept consistent with the previous operating state.
Step 206: and when the target required power is smaller than the lower power limit threshold and the state of charge value of the power battery is larger than the upper preset power battery state of charge threshold, controlling the engine to be in a closed state.
Alternatively, referring to FIG. 4, when the target Power demand is less than Power _ lo and the SOC is greater than SOC _ hi, the engine will be shut down.
Step 207: and when the target required power is smaller than the lower power limit threshold and the state of charge value of the power battery is smaller than the preset lower power battery state of charge threshold, controlling the engine to be in a starting state.
Alternatively, referring to FIG. 4, when the target Power demand is less than Power _ lo and the SOC is less than SOC _ lo, the engine will be turned on.
In addition, after the starting state of the engine and the target required power of the engine are controllable, based on the actual power generation range, the working point of the engine under the highest efficiency and the lowest oil consumption can be calculated, and the working point is stored in an array in a script mode, and the torque and the rotating speed of the engine can be actually calculated through table lookup based on a certain difference method.
In the invention, when the power generation power of the engine meets the power requirement of the whole vehicle, the generator generates power to meet the requirement of the driving motor, so that the high-power discharge of the power battery can be effectively prevented, and the service life of the power battery can be prolonged; when the power is supplied to the driving motor and the power battery is charged, the engine generates power at an optimal working condition point with high power, so that the energy consumption of the whole vehicle is reduced and the emission of the engine is optimized; the starting and stopping of the engine are judged according to the SOC value and the target required power of the engine corrected based on the SOC value, and the starting program is judged by combining the performance parameters of the actual road condition power device and the like in the judging process, so that the frequent starting of the engine is avoided to the maximum extent. When the system adopts the control method, the problems that the fuel consumption and the emission of the engine cannot reach the optimal value and the engine is frequently started in the traditional series control strategy are solved; meanwhile, the long-time high-power discharge of the power battery is avoided, and the service life of the power battery is prolonged; and power battery failure and the like caused by low pull-down SOC.
The control method provided by the embodiment of the invention comprises the steps of determining the required power of an engine based on the driving power of a hybrid electric vehicle, correcting the required power according to the state of charge value of a power battery to obtain the target required power of the engine, controlling the engine to be in a starting state when the target required power is greater than the upper power limit threshold, acquiring the previous working state of the engine closest to the current time when the target required power is less than the lower power limit threshold and the state of charge value of the power battery is within the preset power battery state of charge value range, controlling the engine to be in the previous working state when the target required power is within the preset required power range and the state of charge value of the power battery is greater than the lower power limit threshold, controlling the engine to be in the corresponding previous working state when the target required power is less than the lower power limit threshold, when the charge state value of the power battery is greater than the preset upper limit threshold of the charge state of the power battery, the engine is controlled to be in a closed state, when the target required power is less than the lower limit threshold of the power, and the charge state value of the power battery is less than the preset lower limit threshold of the charge state of the power battery, the engine is controlled to be in a starting state, so that the SOC of the engine of the vehicle can be not considered, along with the power requirement of the whole vehicle, the continuous high-power discharge of the power battery can be effectively prevented, the service life of the battery can be prolonged, the charge and discharge efficiency of the battery can be increased, and the energy consumption of the whole vehicle can be prevented from being influenced.
Referring to fig. 5, a schematic structural diagram of a control device according to a third embodiment of the present invention is shown, and the control device 300 is applied to a series hybrid vehicle having an engine.
The determining module 301 is used for determining the required power of the engine based on the driving power of the hybrid electric vehicle;
the correction module 302 is used for correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine;
the first control module 303 is configured to control the engine to be in a start state when the target required power is greater than the upper power threshold.
Optionally, the apparatus further comprises:
the second control module is used for acquiring the previous working state of the engine closest to the current time when the target required power is smaller than the lower power limit threshold and the charge state value of the power battery is within the range of the preset charge state value of the power battery;
and the third control module is used for controlling the engine to be in a previous working state.
Optionally, the apparatus further comprises:
and the fourth control module is used for controlling the engine to be in the corresponding previous working state when the target required power is within the preset required power range and the state of charge value of the power battery is greater than the lower limit threshold of the state of charge of the power battery.
Optionally, the apparatus further comprises:
and the fifth control module is used for controlling the engine to be in a closed state when the target required power is smaller than the lower power limit threshold and the state of charge value of the power battery is larger than the upper preset power battery state of charge limit threshold.
Optionally, the apparatus further comprises:
and the sixth control module is used for controlling the engine to be in a starting state when the target required power is smaller than the lower power limit threshold and the state of charge value of the power battery is smaller than the preset lower power limit threshold.
The specific implementation of the control device in the embodiment of the present invention has been described in detail at the method side, and therefore, the detailed description thereof is omitted here.
The control device provided by the embodiment of the invention can determine the required power of the engine based on the driving power of the hybrid electric vehicle through the determination module, then correct the required power according to the state of charge value of the power battery through the correction module to obtain the target required power of the engine, and finally control the engine to be in a starting state through the first control module when the target required power is greater than the upper power limit threshold value, so that the engine of the vehicle can keep the engine in the starting state without considering the SOC along with the power requirement of the whole vehicle under the condition that the engine is required to be in the starting state, the continuous high-power discharge of the power battery is effectively prevented, the service life of the battery can be prolonged, the self charge-discharge efficiency of the battery can be increased, and the energy consumption of the whole vehicle is prevented from being influenced.
The embodiment of the invention provides a vehicle which comprises the control device in the second embodiment of the invention.
According to the vehicle provided by the embodiment of the invention, the required power of the engine can be determined based on the driving power of the hybrid electric vehicle through the determination module in the control device, then the required power is corrected through the correction module according to the state of charge value of the power battery to obtain the target required power of the engine, and finally the engine is controlled to be in the starting state through the first control module when the target required power is greater than the upper power limit threshold, so that the engine of the vehicle can keep the engine in the starting state without considering SOC along with the power requirement of the whole vehicle under the condition that the engine is required to be in the starting state, the continuous high-power discharge of the power battery is effectively prevented, the service life of the battery can be prolonged, the self charge and discharge efficiency of the battery can be increased, and the influence on the energy consumption of the whole vehicle is avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A control method characterized by being applied to a series type hybrid vehicle having an engine, the method comprising:
determining a required power of the engine based on a driving power of the hybrid electric vehicle, wherein the driving power of the hybrid electric vehicle is determined by engine emission, engine efficiency, noise, vibration and sound vibration roughness and generator efficiency;
correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine;
when the target required power is larger than a power upper limit threshold, controlling the engine to be in a starting state;
the method for correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine comprises the following steps:
and obtaining a correlation coefficient for correcting the state of charge value of the power battery according to the upper limit threshold of the state of charge value of the power battery, the lower limit threshold of the state of charge value of the power battery and the state of charge value of the power battery, multiplying the charging power of the engine by the correlation coefficient for correcting the state of charge value of the power battery, and adding the required power of the engine to obtain the target required power of the engine.
2. The method according to claim 1, wherein after the correction processing of the required power according to the power battery state of charge value to obtain the target required power of the engine, the method further comprises:
when the target required power is smaller than a power lower limit threshold value and the state of charge value of the power battery is within a preset power battery state of charge value range, acquiring a previous working state of the engine closest to the current time;
and controlling the engine to be in the previous working state.
3. The method according to claim 2, wherein after the correction processing of the required power according to the power battery state of charge value to obtain the target required power of the engine, the method further comprises:
and when the target required power is within a preset required power range and the state of charge value of the power battery is greater than the lower limit threshold of the state of charge of the power battery, controlling the engine to be in the corresponding previous working state.
4. The method according to claim 1, wherein after the correction processing of the required power according to the power battery state of charge value to obtain the target required power of the engine, the method further comprises:
and when the target required power is smaller than a lower power limit threshold and the state of charge value of the power battery is larger than a preset upper power battery state of charge threshold, controlling the engine to be in a closed state.
5. The method according to claim 4, wherein after the correction processing of the required power according to the power battery state of charge value to obtain the target required power of the engine, the method further comprises:
and when the target required power is smaller than the lower power limit threshold and the state of charge value of the power battery is smaller than a preset lower power battery state of charge threshold, controlling the engine to be in the starting state.
6. A control device, characterized by being applied to a series type hybrid vehicle having an engine, the device comprising:
the determination module is used for determining the required power of the engine based on the driving power of the hybrid electric vehicle, wherein the driving power of the hybrid electric vehicle is determined by engine emission, engine efficiency, noise, vibration and sound vibration roughness and generator efficiency;
the correction module is used for correcting the required power according to the state of charge value of the power battery to obtain the target required power of the engine;
the first control module is used for controlling the engine to be in a starting state when the target required power is larger than a power upper limit threshold;
the first control module is specifically configured to obtain a correlation coefficient for correcting the state of charge of the power battery according to an upper limit threshold of the state of charge value of the power battery, a lower limit threshold of the state of charge value of the power battery and the state of charge value of the power battery, multiply the charging power of the engine by the correlation coefficient for correcting the state of charge value of the power battery, and add the required power of the engine to obtain the target required power of the engine.
7. The apparatus of claim 6, further comprising:
the second control module is used for acquiring the previous working state of the engine closest to the current time when the target required power is smaller than a power lower limit threshold and the state of charge value of the power battery is within a preset power battery state of charge value range;
and the third control module is used for controlling the engine to be in the previous working state.
8. The apparatus of claim 7, further comprising:
and the fourth control module is used for controlling the engine to be in the corresponding previous working state when the target required power is in a preset required power range and the state of charge value of the power battery is greater than the lower limit threshold of the state of charge of the power battery.
9. The apparatus of claim 6, further comprising:
and the fifth control module is used for controlling the engine to be in a closed state when the target required power is smaller than a lower power limit threshold and the state of charge value of the power battery is larger than a preset upper power battery state of charge threshold.
10. A vehicle characterized by comprising the control apparatus of any one of claims 6 to 9.
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