CN115716468A - Hybrid all-terrain vehicle and method for controlling power generation power of hybrid all-terrain vehicle - Google Patents
Hybrid all-terrain vehicle and method for controlling power generation power of hybrid all-terrain vehicle Download PDFInfo
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Abstract
The invention discloses a hybrid all-terrain vehicle and a method for controlling the power generation power of the hybrid all-terrain vehicle, wherein the hybrid all-terrain vehicle comprises a motor system, a battery device, a power generation system and a vehicle control unit, the power generation system comprises an engine and a generator, the engine is directly connected with the generator, the vehicle control unit is connected with the motor system, the battery device and the power generation system, and the vehicle control unit is configured as follows: and responding to the power generation mode selection instruction, acquiring the required power of the whole vehicle, determining a target power generation mode according to the power generation mode selection instruction, and controlling the power generation power of the power generation system according to the target power generation mode and the required power of the whole vehicle. Therefore, the hybrid all-terrain vehicle adopts the extended range power system, and the whole vehicle controller is configured to perform energy management on the motor system, the battery device and the power generation system, control the generated power to be adjusted according to the intention of a user and the required power of the whole vehicle, and ensure good economy and dynamic performance.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a hybrid all-terrain vehicle and a method for controlling the power generation power of the hybrid all-terrain vehicle.
Background
The all-terrain vehicle can run on various terrains such as snowfields, deserts, mountains, mudflats and the like, is not limited by road conditions, can freely run on terrains which are difficult to maneuver by common vehicles, and is increasingly popular with the development of technology.
Due to the diversity of the terrain applicable to all-terrain vehicles, the power requirement of all-terrain vehicles is higher, and the cruising ability and the economy of all-terrain vehicles with new energy also need to be considered, the existing all-terrain vehicles have complex speed change mechanisms and higher cost, the driving experience in the aspect of user power needs to be improved, and the energy management strategy of a power system needs to be further optimized.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a hybrid all-terrain vehicle which adopts an extended range power system and provides a brand-new energy management strategy, so that the cost can be reduced and the dynamic property can be improved.
The invention further provides a method for controlling the power generation power of the hybrid all-terrain vehicle.
A hybrid all terrain vehicle according to an embodiment of the invention comprises: a motor system for driving; the battery device and the power generation system are used for providing electric energy for the motor system, the power generation system comprises an engine and a generator, and the engine is directly connected with the generator; a vehicle control unit coupled to the motor system, the battery device, and the power generation system, the vehicle control unit configured to: responding to a power generation mode selection instruction, acquiring the required power of the whole vehicle, determining a target power generation mode according to the power generation mode selection instruction, and controlling the power generation power of the power generation system according to the target power generation mode and the required power of the whole vehicle; the vehicle control unit is further configured to obtain a target power generation power of the engine from a pre-stored calibrated NVH economic curve according to the rotation speed of the engine when the rotation speed of the engine is lower than a preset rotation speed value, and control the engine according to the target power generation power.
Therefore, the hybrid all-terrain vehicle provided by the embodiment of the invention is driven by the motor system, the electric energy is provided for the motor system by the battery device and the power generation system, the power generation system comprises the engine and the generator, the engine and the generator are directly connected, namely, the extended range power system is adopted, the characteristics of wide rotating speed range, large torque range and the like of the motor are utilized for directly driving, a complex speed change mechanism can be reduced, the cost is effectively reduced, and the vehicle control unit can manage the energy of the motor system, the battery device and the power generation system by configuring the vehicle control unit, control the generated power to be adjusted according to the intention of a user and the required power of the vehicle, and ensure the good economy and dynamic performance of the hybrid all-terrain vehicle.
According to some embodiments of the invention, the power generation mode comprises a step constant power generation mode; the vehicle control unit is configured to obtain a first target power working point from a plurality of pre-stored power working points according to the vehicle demand power, obtain a target power generation power corresponding to the first target power working point, and control the power generation system to output the target power generation power when controlling the power generation power of the power generation system according to the target power generation mode and the vehicle demand power, wherein the power working point is a minimum fuel consumption point on an equal power curve of the power generation system.
According to some embodiments of the invention, the vehicle controller is further configured to obtain a power difference value between the actual generated power and the vehicle demand power when the actual generated power output by the power generation system is higher than the vehicle demand power, and control the power generation system to charge the battery device according to the power difference value.
According to some embodiments of the invention, the vehicle controller is further configured to obtain a second target power operating point according to the vehicle demanded power when the power difference is greater than a maximum allowable charging power of the battery device, wherein the second target power operating point is smaller than the first target power operating point.
According to some embodiments of the invention, the power generation mode comprises a power-following power generation mode; the vehicle control unit is configured to adjust the generated power output by the power generation system in real time according to the power demand of the whole vehicle and a power generation economic curve when controlling the generated power of the power generation system according to the target power generation mode and the power demand of the whole vehicle, so that the generated power output by the power generation system follows the power demand of the whole vehicle, wherein the power generation economic curve is obtained by smoothly connecting a minimum fuel consumption point on an equal power curve of the power generation system.
According to some embodiments of the present invention, the vehicle controller is further configured to, when the actual generated power output by the power generation system is higher than the vehicle demand power, obtain a power difference between the actual generated power and the vehicle demand power, and control the power generation system to charge the battery device according to the power difference, or, when the actual generated power output by the power generation system is lower than the vehicle demand power, control the actual generated power output by the power generation system to follow the maximum generated power of the vehicle demand power.
According to some embodiments of the invention, the vehicle control unit is further configured to control the power generation system to reduce the output generated power when the power difference is higher than a maximum allowable charging power of the battery device, so that the power difference is the maximum allowable charging power.
The method for controlling the power generation of the hybrid all-terrain vehicle is used for the vehicle control unit of the hybrid all-terrain vehicle of the embodiment of the invention, and comprises the following steps: responding to a power generation mode selection instruction, and acquiring the required power of the whole vehicle; determining a target power generation mode according to the power generation mode selection instruction; controlling the generated power of the power generation system of the hybrid all-terrain vehicle according to the target power generation mode and the required power of the whole vehicle; and when the rotating speed of the engine is lower than a preset rotating speed value, obtaining the target generating power of the engine from a pre-stored calibrated NVH economic curve according to the rotating speed of the engine, and controlling the engine according to the target generating power.
According to some embodiments of the invention, the power generation mode comprises a step constant power generation mode; controlling the generated power of the power generation system according to the target power generation mode and the required power of the whole vehicle, and the method comprises the following steps: obtaining a first target power working point from a plurality of prestored power working points according to the required power of the whole vehicle; acquiring target generating power corresponding to the first target power working point; and controlling the power generation system to output the target power generation power, wherein the power working point is a minimum fuel consumption point on an equal power curve of the power generation system.
According to some embodiments of the present invention, controlling the generated power of the power generation system according to the target power generation mode and the vehicle required power further includes: when the actual generated power output by the power generation system is higher than the required power of the whole vehicle, obtaining a power difference value between the actual generated power and the required power of the whole vehicle; and controlling the power generation system to charge the battery device according to the power difference.
According to some embodiments of the invention, controlling the generated power of the power generation system according to the target power generation mode and the vehicle required power further comprises: and when the power difference value is greater than the maximum allowable charging power of the battery device, obtaining a second target power working point according to the required power of the whole vehicle, wherein the second target power working point is smaller than the first target power working point.
According to some embodiments of the invention, the power generation mode comprises a power-following power generation mode; controlling the generated power of the power generation system according to the target power generation mode and the required power of the whole vehicle, and the method comprises the following steps: and adjusting the generated power output by the power generation system in real time according to the required power of the whole vehicle and a power generation economic curve so as to enable the generated power output by the power generation system to follow the required power of the whole vehicle, wherein the power generation economic curve is obtained by smoothly connecting a minimum fuel consumption point on an equipower curve of the power generation system.
According to some embodiments of the present invention, controlling the generated power of the power generation system according to the target power generation mode and the vehicle required power further includes: when the actual generated power output by the power generation system is higher than the required power of the whole vehicle, obtaining a power difference value between the actual generated power and the required power of the whole vehicle, and controlling the power generation system to charge the battery device according to the power difference value; or when the actual generated power output by the power generation system is lower than the required power of the whole vehicle, controlling the power generation system to output the maximum generated power following the required power of the whole vehicle.
According to some embodiments of the present invention, controlling the generated power of the power generation system according to the target power generation mode and the vehicle required power further includes: and when the power difference value is higher than the maximum allowable charging power of the battery device, controlling the power generation system to reduce the output generated power so that the power difference value is the maximum allowable charging power.
A hybrid all terrain vehicle according to an embodiment of the invention comprises: a motor and a motor controller that controls the motor to drive the hybrid all terrain vehicle; the battery management device comprises a battery manager and a battery, wherein the battery manager is used for monitoring the charging power of the battery; a power generation system, the power generation system comprising: a generator and a generator controller, the generator controller controlling the generator to move to provide electrical energy for the battery or motor; the engine is directly connected with the generator, and the engine manager controls the engine to operate so as to drive the generator to operate; and the vehicle control unit is connected with the battery manager, the motor controller, the engine manager and the generator controller and is used for controlling the generated power of the generator according to the method for controlling the generated power of the hybrid all-terrain vehicle disclosed by the embodiment of the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a hybrid ATV according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of power distribution among different modes of a hybrid ATV according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a hybrid all terrain vehicle in a stepped constant power generation mode in accordance with an embodiment of the present invention;
FIG. 4 is a schematic illustration of a hybrid all terrain vehicle in a power-following generating mode in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a power operating point according to an embodiment of the invention;
FIG. 6 is a schematic illustration of an economic line of power generation according to an embodiment of the invention;
FIG. 7 is a flow chart of a method of controlling the power generated by a hybrid all-terrain vehicle according to an embodiment of the present invention;
fig. 8 is a flowchart of step S3 in the step constant power generation mode;
fig. 9 is a flowchart of step S3 in the power-following power generation mode.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A hybrid atv that may employ a method of controlling the power generated by the hybrid atv according to an embodiment of the invention will be described with reference to fig. 1-9.
As shown in fig. 1 and 2 in conjunction, a hybrid all terrain vehicle according to embodiments of the present invention may consist essentially of: the system comprises a motor system, a battery device, a power generation system and a vehicle control unit. The motor system is used for driving, the battery device and the power generation system are used for providing electric energy for the motor system, the power generation system can comprise an engine and a generator, the engine is directly connected with the generator, and the whole vehicle controller is connected with the motor system, the battery device and the power generation system.
Specifically, when the hybrid all-terrain vehicle works, the motor system drives the hybrid all-terrain vehicle to move, the accessories such as the air conditioning compressor and the high-pressure part ensure that internal parts of the vehicle work normally, the motor system and the accessories need power support, the driving power of the motor system and the driving power of the accessories form the required power of the whole vehicle of the hybrid all-terrain vehicle, and the battery device and the power generation system can provide the required power of the whole vehicle for the hybrid all-terrain vehicle.
On one hand, the battery device can provide electric energy for the motor system, the motor system can convert the electric energy into mechanical energy to realize the driving and normal driving of the hybrid all-terrain vehicle, on the other hand, the power generation system can assist the battery device, when the engine converts the chemical energy of the fuel into the mechanical energy to be output, the generator can convert the mechanical energy from the engine into the electric energy to provide the electric energy for the motor system, namely, the extended range power system is adopted, so that the mileage anxiety of a user can be reduced, and the power generation system can charge the battery device, so that the use convenience of the user can be improved.
It should be noted that, different from the hybrid all-terrain vehicle directly driven by the engine, since the motor system has a wide range of rotation speed and a large range of torque, a complicated speed change mechanism can be reduced by driving the hybrid all-terrain vehicle by the motor system, so that the production cost of the hybrid all-terrain vehicle can be effectively reduced, and the dynamic driving experience of a user can be improved.
In the driving process of the hybrid all-terrain vehicle, energy management needs to be carried out on a motor system, a battery device and a power generation system, and the vehicle control unit is arranged and connected with the motor system, the battery device and the power generation system, so that the vehicle control unit can carry out energy management on the motor system, the battery device and the power generation system and balance energy distribution.
As shown in conjunction with fig. 1-6, the hybrid controller may be configured to: the method comprises the steps of responding to a power generation mode selection instruction, obtaining the required power of the whole vehicle, determining a target power generation mode according to the power generation mode selection instruction, and controlling the power generation power of a power generation system according to the target power generation mode and the required power of the whole vehicle, so that when a user selects different power generation modes according to different driving experience requirements, and sends the power generation mode selection instruction to the whole vehicle controller through a physical key or a screen virtual key, the whole vehicle controller can not only respond to the power generation mode selection instruction, determine the target power generation mode according to the power generation mode selection instruction, but also obtain the required power of the whole vehicle according to the current driving condition, and further control the power generation power of the power generation system according to the target power generation mode and the required power of the whole vehicle, so that the whole vehicle controller can comprehensively coordinate the working states of a motor system, a battery device and the power generation system, reasonably distribute energy, can meet the switching of different power generation modes of the hybrid all-terrain vehicle, meet different driving requirements of the user, can ensure that the power generation system works in a better efficiency area, and can ensure the economy and the dynamic performance of the hybrid all-terrain vehicle.
Further, the vehicle control unit may be further configured to obtain a target power generation power of the engine from a pre-stored calibrated NVH economic curve according to the rotation speed of the engine when the rotation speed of the engine is lower than a preset rotation speed value, and control the engine according to the target power generation power, so that when the rotation speed of the engine is lower than the preset rotation speed value, for example, the preset rotation speed value may be set to 10 steps, the target power generation power of the engine may be obtained from the pre-stored calibrated NVH economic curve according to the rotation speed of the engine, and further the engine may be controlled according to the target power generation power, so that the torque of the engine may be limited, the engine may be prevented from being in a low-speed and high-torque condition, the operating noise of the engine may be reduced, and the NVH performance of the hybrid all-terrain vehicle may be ensured.
Therefore, the hybrid all-terrain vehicle provided by the embodiment of the invention is driven by the motor system, the electric energy is provided for the motor system by the battery device and the power generation system, the power generation system comprises the engine and the generator, the engine and the generator are directly connected, namely, the extended range power system is adopted, the characteristics of wide rotating speed range, large torque range and the like of the motor are utilized for directly driving, a complex speed change mechanism can be reduced, the cost is effectively reduced, and the vehicle control unit can manage the energy of the motor system, the battery device and the power generation system by configuring the vehicle control unit, control the generated power to be adjusted according to the intention of a user and the required power of the vehicle, and ensure the good economy and dynamic performance of the hybrid all-terrain vehicle.
As shown in connection with fig. 2, 4 and 5, the power generation mode may include a step constant power generation mode. The vehicle control unit is configured to obtain a first target power working point from a plurality of pre-stored power working points according to the required power of the whole vehicle, obtain target generating power corresponding to the first target power working point, and control the power generation system to output the target generating power when controlling the generating power of the power generation system according to the target power generation mode and the required power of the whole vehicle, wherein the power working point is a minimum fuel consumption point on an equal power curve of the power generation system. Specifically, the power generation mode may include a step constant power generation mode, and according to a power generation fuel consumption diagram of the power generation system and an equal power curve of the power generation system, a plurality of power operating points of the power generation system may be obtained, where the power operating point is a minimum fuel consumption point on the equal power curve of the power generation system, and thus the vehicle controller may pre-store a plurality of fixed power operating points according to a range of a required power of the vehicle, for example: multiple power operating points of 5kw, 10kw, 20kw, 30kw, 40kw, 50kw, etc. can be set, and the multiple power operating points are distributed in a step shape, it should be noted that the number of the power operating points and the power of each step can be calibrated, and the switching between different step powers needs to consider the gradient filtering and the hysteresis interval.
Correspondingly, under the condition that the target power generation mode is determined to be the stepped constant power generation mode, the vehicle controller can obtain a first target power working point matched with the required power of the whole vehicle from a plurality of prestored power working points according to the required power of the whole vehicle, and further obtain corresponding target power generation power through the first target power working point, so that the power generation system outputs the target power generation power, the target power generation power of the power generation system can be adjusted in a stepped manner within a certain range of the required power of the whole vehicle, the power generation system can work constantly at a better power working point, and the fuel economy of the hybrid all-terrain vehicle can be ensured.
Further, the vehicle control unit is configured to obtain a power difference value between the actual generated power and the vehicle demand power when the actual generated power output by the power generation system is higher than the vehicle demand power, and control the power generation system to charge the battery device according to the power difference value. Specifically, when the target power generation mode is determined to be the stepped constant power generation mode, the vehicle control unit correspondingly controls the power generation system to output the target power generation power according to the vehicle demand power, the actual power generation power output by the power generation system may be higher than the vehicle demand power, when the actual power generation power output by the power generation system is higher than the vehicle demand power, the power generation system provides electric energy for driving the vehicle, and the power difference value between the actual power generation power and the vehicle demand power can be used for charging the battery device, so that the battery device can be conveniently charged, the energy utilization rate can be improved, a user can be prevented from searching the charging pile to charge the battery device in an emergency, and the use convenience of the user can be improved.
Further, the vehicle controller is further configured to obtain a second target power operating point according to the vehicle required power when the power difference is greater than the maximum allowable charging power of the battery device, wherein the second target power operating point is smaller than the first target power operating point. Specifically, the battery device has maximum allowable charging power, when the power difference value between the actual generated power of the power generation system and the required power of the whole vehicle is greater than the maximum allowable charging power of the battery device, in order to ensure the normal operation of the battery device, the stepped constant power generation can be performed according to the required power of the whole vehicle and the first target power working point, so that the second target power working point can be obtained on the premise that the power difference value is not greater than the maximum allowable charging power of the battery device, the second target power working point is smaller than the first target power working point, and the whole vehicle controller correspondingly controls the power generation system to output the target generated power according to the second target power working point, so that the battery device can be prevented from being overcharged, the structure of the battery device can be prevented from being damaged, the structural stability of the battery device can be ensured, and the reliability of the hybrid all-terrain vehicle can be improved.
As shown in connection with fig. 2, 4 and 6, the power generation mode may include a power-following power generation mode. The vehicle control unit is configured to adjust the generated power output by the power generation system in real time according to the required power of the whole vehicle and a power generation economic curve when controlling the generated power of the power generation system according to a target power generation mode and the required power of the whole vehicle, so that the generated power output by the power generation system follows the required power of the whole vehicle, wherein the power generation economic curve is obtained for a minimum fuel consumption point on an equal power curve which is smoothly connected with the power generation system. Specifically, the power generation mode may include a power following power generation mode, and the minimum fuel consumption level on the equal power curve of the power generation system is connected in a sliding manner according to a power generation fuel consumption diagram of the power generation system and the equal power curve of the power generation system, so that a power generation economic curve of the power generation system may be obtained, and the vehicle controller may prestore the power generation economic curve.
Correspondingly, after the target power generation mode is determined as the power following power generation mode, the vehicle control unit can adjust the power generation power output by the power generation system in real time according to the required power of the vehicle and the power generation economic curve, so that the power generation power of the power generation system can be adjusted relatively quickly in real time according to the required power of the vehicle, the power generation power of the power generation system and the required power of the vehicle are in a following state in a large range, the dynamic property of the hybrid all-terrain vehicle can be improved, the power requirements of the hybrid all-terrain vehicle in complex terrains such as sand beach, riverbed, forest road and stream can be met, and the driving experience of a user is improved. It should be noted that, in the process of adjusting the generated power along with the change of the required power of the whole vehicle, gradient filtering should be considered.
The vehicle control unit is also configured to obtain a power difference value between the actual generated power and the vehicle required power when the actual generated power output by the power generation system is higher than the vehicle required power, and control the power generation system to charge the battery device according to the power difference value, or control the actual generated power output by the power generation system to follow the maximum generated power of the vehicle required power when the actual generated power output by the power generation system is lower than the vehicle required power. Specifically, when the target power generation mode is determined as a power following power generation mode, and the vehicle controller correspondingly adjusts the output power generation power of the power generation system according to the required power of the whole vehicle, the actual power generation power output by the power generation system may be higher than the required power of the whole vehicle or lower than the required power of the whole vehicle.
Further, the vehicle control unit is configured to control the power generation system to reduce the output generated power so that the power difference is the maximum allowable charging power when the power difference is higher than the maximum allowable charging power of the battery device. Specifically, the battery device has the maximum allowable charging power, when the power difference value is higher than the maximum allowable charging power of the battery device, the vehicle controller can control the power generation system to reduce the output power generation power, and the power difference value is ensured to be the maximum charging power, so that the battery device can be rapidly charged on the premise that the power generation power of the power generation system can meet the requirement of the whole vehicle, the battery device can be prevented from being excessively charged, the damage of the battery device can be avoided, and the reliability of the hybrid all-terrain vehicle can be further improved.
Referring to fig. 7, which is a flowchart illustrating a method for controlling the power generated by a hybrid all-terrain vehicle according to an embodiment of the present invention, the method of the embodiment of the present invention may be applied to the vehicle controller of the hybrid all-terrain vehicle according to the embodiment of the present invention, and as shown in fig. 7, the method for controlling the power generated by the hybrid all-terrain vehicle according to the embodiment of the present invention may include the following steps:
s1, responding to a power generation mode selection instruction, and acquiring the required power of the whole vehicle;
s2, determining a target power generation mode according to the power generation mode selection instruction;
s3, controlling the power generation power of a power generation system of the hybrid all-terrain vehicle according to the target power generation mode and the required power of the whole vehicle;
and S4, when the rotating speed of the engine is lower than a preset rotating speed value, obtaining the target generating power of the engine from a pre-stored calibrated NVH economic curve according to the rotating speed of the engine, and controlling the engine according to the target generating power.
Specifically, when the method for controlling the power generation power of the hybrid all-terrain vehicle is used for controlling the power generation power of the hybrid all-terrain vehicle, a user inputs a power generation mode selection instruction to the vehicle control unit, the vehicle control unit can respond to the power generation mode selection instruction firstly, and then can determine a target power generation mode according to the power generation mode selection instruction, so that the power generation power of the power generation system of the hybrid all-terrain vehicle can be controlled according to the target power generation mode and the required power of the whole vehicle, and the power generation power of the power generation system can be adjusted according to the intention of the user and the required power of the whole vehicle.
Furthermore, the engine is directly connected with the generator, the engine drives the generator, the working noise of the engine under the working condition of low speed and large torque is large, when the power generation power of the hybrid all-terrain vehicle is controlled by adopting a method for controlling the power generation power of the hybrid all-terrain vehicle, no matter what the target power generation mode is, the NVH performance of the hybrid all-terrain vehicle needs to be considered, when the rotating speed of the engine is lower than a preset rotating speed value, the target power generation power of the engine is obtained from a pre-stored calibrated NVH economic curve according to the rotating speed of the engine, the engine is controlled according to the target power generation power, the torque of the engine is limited, and the working noise of the engine is reduced.
As shown in fig. 8, the power generation mode may include a step constant power generation mode, and the step S3 may include the steps of:
s3-1, obtaining a first target power working point from a plurality of prestored power working points according to the required power of the whole vehicle;
s3-2, acquiring target generating power corresponding to the first target power working point;
and S3-3, controlling the power generation system to output the target power generation power, wherein the power working point is the minimum fuel consumption point on the equal power curve of the power generation system.
Specifically, after the vehicle control unit determines the target power generation mode as the stepped constant power generation mode according to a power generation mode selection instruction input by a user, in the process of controlling the power generation power of the power generation system of the hybrid all-terrain vehicle according to the target power generation mode and the required power of the vehicle, the vehicle control unit can firstly obtain a first target power working point in a plurality of pre-stored power working points according to the required power of the vehicle, then obtain corresponding target power generation power according to the rotating speed and the torque corresponding to the first target power working point, and then control the power generation system to output the target power generation power by the vehicle control unit, so that the required power of the vehicle can be met, the normal driving of the hybrid all-terrain vehicle can be ensured, the fuel consumption of the power generation system under the power can be ensured to be minimum, and the economy and the dynamic performance of the hybrid all-terrain vehicle can be ensured.
Further, step S3 may further include the steps of:
s3-4, when the actual generated power output by the power generation system is higher than the required power of the whole vehicle, obtaining a power difference value between the actual generated power and the required power of the whole vehicle;
and S3-5, controlling a power generation system to charge the battery device according to the power difference.
Specifically, after the vehicle control unit determines the target power generation mode as the stepped constant power generation mode according to a power generation mode selection instruction input by a user, in the process that the vehicle control unit controls the power generation power of the power generation system of the hybrid all-terrain vehicle according to the target power generation mode and the required power of the vehicle, the magnitude relation between the actual power generation power output by the power generation system and the required power of the vehicle is also considered, when the actual power generation power output by the power generation system is higher than the required power of the vehicle, the vehicle control unit can obtain the power difference value between the actual power generation power and the required power of the vehicle, and then the power generation system can be controlled to charge the battery device according to the power difference value, so that the full utilization of energy is ensured.
Step S3 may further include the steps of:
and S3-6, when the power difference value is larger than the maximum allowable charging power of the battery device, obtaining a second target power working point according to the required power of the whole vehicle, wherein the second target power working point is smaller than the first target power working point.
Specifically, after the vehicle control unit determines the target power generation mode as the stepped constant power generation mode according to a power generation mode selection instruction input by a user, the vehicle control unit needs to consider the maximum allowable charging power of the battery device in the process of controlling the power generation power of the power generation system of the hybrid all-terrain vehicle according to the target power generation mode and the required power of the vehicle, and when the power difference is greater than the maximum allowable charging power of the battery device, the stepped reduction is performed in a plurality of power working points according to the required power of the vehicle to obtain a second target power working point, so that the overcharge of the battery device can be prevented, the structural stability of the battery device is ensured, and the full utilization of energy is ensured.
As shown in connection with fig. 9, the power generation mode includes a power following power generation mode, and step S3 may include the steps of:
and S3-7, adjusting the generated power output by the power generation system in real time according to the required power of the whole vehicle and a power generation economic curve so that the generated power output by the power generation system follows the required power of the whole vehicle, wherein the power generation economic curve is obtained by smoothly connecting minimum fuel consumption points on an equal power curve of the power generation system.
Specifically, after the vehicle control unit determines the target power generation mode as the power following power generation mode according to a power generation mode selection instruction input by a user, the vehicle control unit can adjust the generated power output by power generation in real time according to the required power of the vehicle and the power generation economic curve in the process of controlling the generated power of the power generation system of the hybrid all-terrain vehicle according to the target power generation mode and the required power of the vehicle, so that the generated power output by the power generation system can follow the required power of the vehicle, and the power requirement of the hybrid all-terrain vehicle is ensured.
Further, step S3 may further include the steps of:
s3-8, when the actual generated power output by the power generation system is higher than the required power of the whole vehicle, obtaining a power difference value between the actual generated power and the required power of the whole vehicle, and controlling the power generation system to charge the battery device according to the power difference value;
and S3-9, when the actual generated power output by the power generation system is lower than the required power of the whole vehicle, controlling the power generation system to output the maximum generated power following the required power of the whole vehicle.
And S3-10, when the power difference is higher than the maximum allowable charging power of the battery device, controlling the power generation system to reduce the output generated power so that the power difference is the maximum allowable charging power.
Specifically, after the vehicle control unit determines the target power generation mode as the power following power generation mode according to a power generation mode selection instruction input by a user, in the process that the vehicle control unit controls the power generation power of the power generation system of the hybrid all-terrain vehicle according to the target power generation mode and the required power of the vehicle, the magnitude relation between the actual power generation power output by the power generation system and the required power of the vehicle needs to be considered, when the actual power generation power output by the power generation system is higher than the required power of the vehicle, the vehicle control unit can obtain a power difference value between the actual power generation power and the required power of the vehicle, the power generation system is controlled to charge the battery device according to the power difference value, the maximum allowed charging power of the battery needs to be further considered, when the power difference value is higher than the maximum allowed charging power of the battery device, the power generation system is controlled to reduce the output power generation power, the power difference value is the maximum charging power, and when the actual power generation power output by the power generation system is lower than the required power of the vehicle, the vehicle control unit directly controls the power generation system to output the maximum power generation power following the required power.
Referring to fig. 1-9, a hybrid all terrain vehicle according to embodiments of the present invention may generally comprise: the system comprises a motor, a motor controller, a battery manager, a battery, a power generation system and a vehicle control unit, wherein the motor controller controls the motor to drive the hybrid all-terrain vehicle, the battery manager is used for monitoring the charging power of the battery, and the power generation system mainly comprises: the whole vehicle controller is connected with the battery manager, the motor controller, the engine manager and the generator controller and used for controlling the power generation power of the generator according to the method for controlling the power generation power of the hybrid all-terrain vehicle disclosed by the embodiment of the invention.
Specifically, the vehicle control unit is connected with the battery manager, the motor controller, the engine manager and the generator controller, so that when the hybrid all-terrain vehicle works, the vehicle control unit can comprehensively coordinate the working states of the battery, the motor, the engine and the generator according to the intention of a user and the required power of the whole vehicle by controlling the battery manager, the motor controller, the engine manager and the generator controller, and reasonably distribute energy, and the battery manager, the motor controller and the engine management and generator controller can also feed back the working states of the battery, the motor, the engine and the generator to the vehicle control unit, so that the switching of different driving modes of the hybrid all-terrain vehicle can be met, the use experience of the user is improved, parts of the hybrid all-terrain vehicle can be ensured to work in a better efficiency area, and the economical efficiency and the dynamic performance of the hybrid all-terrain vehicle are ensured.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (15)
1. A hybrid all terrain vehicle comprising:
a motor system for driving;
the system comprises a battery device and a power generation system, wherein the battery device and the power generation system are used for providing electric energy for the motor system, the power generation system comprises an engine and a generator, and the engine is directly connected with the generator;
a vehicle control unit coupled to the motor system, the battery device, and the power generation system, the vehicle control unit configured to: responding to a power generation mode selection instruction, acquiring the required power of the whole vehicle, determining a target power generation mode according to the power generation mode selection instruction, and controlling the power generation power of the power generation system according to the target power generation mode and the required power of the whole vehicle; the vehicle control unit is further configured to obtain a target power generation power of the engine from a pre-stored calibrated NVH economic curve according to the rotation speed of the engine when the rotation speed of the engine is lower than a preset rotation speed value, and control the engine according to the target power generation power.
2. The hybrid all terrain vehicle of claim 1,
the power generation mode comprises a step constant power generation mode;
the vehicle control unit is configured to obtain a first target power working point from a plurality of pre-stored power working points according to the vehicle demand power, obtain a target power generation power corresponding to the first target power working point, and control the power generation system to output the target power generation power when controlling the power generation power of the power generation system according to the target power generation mode and the vehicle demand power, wherein the power working point is a minimum fuel consumption point on an equal power curve of the power generation system.
3. The hybrid all-terrain vehicle of claim 2, wherein the vehicle controller is further configured to obtain a power difference between the actual generated power and the vehicle demanded power when the actual generated power output by the power generation system is greater than the vehicle demanded power, and to control the power generation system to charge the battery device based on the power difference.
4. The hybrid all terrain vehicle of claim 3 wherein the vehicle controller is further configured to achieve a second target power operating point as a function of the vehicle demanded power when the power differential is greater than a maximum allowed charging power for the battery arrangement, wherein the second target power operating point is less than the first target power operating point.
5. The hybrid all terrain vehicle of claim 1,
the power generation mode comprises a power following power generation mode;
the vehicle control unit is configured to adjust the generated power output by the power generation system in real time according to the power demand of the whole vehicle and a power generation economic curve when controlling the generated power of the power generation system according to the target power generation mode and the power demand of the whole vehicle, so that the generated power output by the power generation system follows the power demand of the whole vehicle, wherein the power generation economic curve is obtained by smoothly connecting a minimum fuel consumption point on an equal power curve of the power generation system.
6. The hybrid all-terrain vehicle of claim 5, wherein the vehicle controller is further configured to obtain a power difference between the actual generated power and the vehicle demanded power when the actual generated power output by the power generation system is greater than the vehicle demanded power, control the power generation system to charge the battery device according to the power difference, or control the actual generated power output by the power generation system to follow a maximum generated power of the vehicle demanded power when the actual generated power output by the power generation system is less than the vehicle demanded power.
7. The hybrid all terrain vehicle of claim 6 wherein the vehicle controller is further configured to control the power generation system to reduce the output generated power such that the power difference is the maximum allowable charging power when the power difference is greater than the maximum allowable charging power of the battery device.
8. A method of controlling the power generated by a hybrid all terrain vehicle, characterized in that the vehicle controller for a hybrid all terrain vehicle of any of claims 1-7, the method comprises:
responding to a power generation mode selection instruction, and acquiring the required power of the whole vehicle;
determining a target power generation mode according to the power generation mode selection instruction;
controlling the generated power of the power generation system of the hybrid all-terrain vehicle according to the target power generation mode and the required power of the whole vehicle;
and when the rotating speed of the engine is lower than a preset rotating speed value, obtaining the target generating power of the engine from a pre-stored calibrated NVH economic curve according to the rotating speed of the engine, and controlling the engine according to the target generating power.
9. The method of controlling the power generated by a hybrid all terrain vehicle of claim 8,
the power generation mode comprises a step constant power generation mode;
controlling the generated power of the power generation system according to the target power generation mode and the required power of the whole vehicle, and the method comprises the following steps:
obtaining a first target power working point from a plurality of prestored power working points according to the required power of the whole vehicle;
acquiring target generating power corresponding to the first target power working point;
and controlling the power generation system to output the target power generation power, wherein the power working point is a minimum fuel consumption point on an equal power curve of the power generation system.
10. The method of controlling the generated power of a hybrid all-terrain vehicle of claim 9, wherein controlling the generated power of the power generation system in accordance with the target generation mode and the overall vehicle demand power, further comprises:
when the actual generated power output by the power generation system is higher than the required power of the whole vehicle, obtaining a power difference value between the actual generated power and the required power of the whole vehicle;
and controlling the power generation system to charge the battery device according to the power difference.
11. The method of controlling the generated power of a hybrid all terrain vehicle of claim 10 wherein controlling the generated power of the power generation system as a function of the target generation mode and the overall vehicle demand power further comprises:
and when the power difference value is greater than the maximum allowable charging power of the battery device, obtaining a second target power working point according to the required power of the whole vehicle, wherein the second target power working point is smaller than the first target power working point.
12. The method of controlling the power generated by a hybrid all terrain vehicle of claim 8,
the power generation mode comprises a power-following power generation mode;
controlling the generated power of the power generation system according to the target power generation mode and the finished automobile required power, and the method comprises the following steps:
and adjusting the generated power output by the power generation system in real time according to the required power of the whole vehicle and a power generation economic curve so as to enable the generated power output by the power generation system to follow the required power of the whole vehicle, wherein the power generation economic curve is obtained by smoothly connecting a minimum fuel consumption point on an equipower curve of the power generation system.
13. The method of controlling the generated power of a hybrid all-terrain vehicle of claim 12, wherein controlling the generated power of the power generation system as a function of the target generation mode and the overall vehicle demand power, further comprises:
when the actual generated power output by the power generation system is higher than the required power of the whole vehicle, obtaining a power difference value between the actual generated power and the required power of the whole vehicle, and controlling the power generation system to charge the battery device according to the power difference value;
or when the actual generated power output by the power generation system is lower than the required power of the whole vehicle, controlling the power generation system to output the maximum generated power following the required power of the whole vehicle.
14. The method of controlling the power generated by a hybrid all-terrain vehicle of claim 13, wherein controlling the power generated by the power generation system based on the target power generation mode and the overall vehicle demand power further comprises:
and when the power difference value is higher than the maximum allowable charging power of the battery device, controlling the power generation system to reduce the output generated power so that the power difference value is the maximum allowable charging power.
15. A hybrid all terrain vehicle comprising:
a motor and a motor controller that controls the motor to drive the hybrid all terrain vehicle;
the battery management device comprises a battery manager and a battery, wherein the battery manager is used for monitoring the charging power of the battery;
a power generation system, the power generation system comprising:
a generator and a generator controller, the generator controller controlling the generator to move to provide electrical energy for the battery or motor;
the engine is directly connected with the generator, and the engine manager controls the engine to operate so as to drive the generator to operate;
a vehicle control unit connected to the battery manager, the motor controller, the engine manager and the generator controller for controlling the power generated by the generator according to the method of controlling the power generated by a hybrid all terrain vehicle of any of claims 8-14.
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| CN116653911A (en) * | 2023-05-29 | 2023-08-29 | 广州汽车集团股份有限公司 | Hybrid system control method and device, computer readable medium and electronic equipment |
| CN116653911B (en) * | 2023-05-29 | 2024-02-13 | 广州汽车集团股份有限公司 | Hybrid system control method and device, computer readable medium and electronic equipment |
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