CN113147723B - Weak hybrid power system of non-road mobile vehicle and dynamic control method - Google Patents
Weak hybrid power system of non-road mobile vehicle and dynamic control method Download PDFInfo
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- CN113147723B CN113147723B CN202110615807.6A CN202110615807A CN113147723B CN 113147723 B CN113147723 B CN 113147723B CN 202110615807 A CN202110615807 A CN 202110615807A CN 113147723 B CN113147723 B CN 113147723B
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Classifications
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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
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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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
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
- B60W20/14—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion in conjunction with braking regeneration
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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
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0644—Engine speed
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
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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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/086—Power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Abstract
The invention relates to a weak hybrid power system and a dynamic control method of a non-road mobile vehicle, wherein the weak hybrid power system comprises an ISG motor controller, according to the running state of the non-road mobile vehicle, by switching the working mode of an ISG motor, the power battery and a super capacitor are matched with the mode of the ISG motor, so that the output of a turbocharged diesel engine and the ISG motor reaches preset power or rotating speed data. The invention can effectively reduce the response lag time of the turbocharger, thereby improving the responsiveness of the power output of the engine and further improving the acceleration performance of the vehicle. And when the vehicle brakes, the regenerative braking energy is further absorbed, the energy utilization rate is improved, and meanwhile, the maneuvering performance of the vehicle is ensured.
Description
Technical Field
The invention relates to the technical field of hybrid vehicles, in particular to a weak hybrid power system and a dynamic control method of a non-road mobile vehicle.
Background
With the increasingly prominent problems of environmental pollution and energy shortage, the advantages of each power source can be fully utilized by adopting a hybrid power system for the non-road mobile vehicle, and the fuel consumption and the emission can be reduced on the premise of not reducing the dynamic property of the vehicle. At present, a series hybrid power system formed by an engine-generator set and a power battery is mostly adopted by a hybrid power non-road mobile vehicle, and the power system has the characteristics of high transient power and small battery capacity due to the restriction of weight and space, and belongs to a weak hybrid power system, wherein the engine is still a main power source of the system.
Because of the small battery capacity of the weakly mixed system, the battery power can quickly reach the upper power limit during the acceleration process of the vehicle, and because of the poor dynamic response of an engine-generator unit consisting of a highly supercharged diesel engine and a generator, the battery power can not quickly provide enough power to meet the driving requirement under the condition of rapid acceleration, so that the battery is overdischarged or even the engine emits black smoke, and the vehicle speed is difficult to increase, thereby seriously affecting the service life of the battery and severely restricting the maneuvering performance of the vehicle.
Disclosure of Invention
The invention aims to solve the technical problem of providing a weak hybrid power system and a dynamic control method of a non-road mobile vehicle aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
a weak hybrid system of an off-road mobile vehicle, the system comprising a turbocharged diesel engine, an engine controller, an ISG motor controller, a super capacitor, a power cell, a DC/DC converter, a motor controller, and a side drive:
the turbocharged diesel engine is connected with the ISG motor through a shaft, the ISG motor is connected with a direct current bus through the ISG motor controller, the power battery is connected with the direct current bus after being connected with the super capacitor in parallel through the DC/DC converter, the rear end of the direct current bus is connected with the motor controller, the motor controller drives the motor to operate, and the motor drives wheels to operate through side transmission;
according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor, and the power battery and the super capacitor are matched with the mode of the ISG motor, so that the output of the turbo-charged diesel engine and the ISG motor reaches preset power or rotating speed data.
On the basis of the technical scheme, the invention can be improved as follows.
Further, when the running state of the off-road mobile vehicle is that the vehicle is started, the ISG motor controller switches the working mode of the ISG motor to a driving mode, the extra power of the power battery is used for driving the ISG motor, the ISG motor drags the turbocharged diesel engine to start, and the engine controller transmits an oil injection signal to the turbocharged diesel engine, so that the turbocharged diesel engine is enabled to spray a proper amount of diesel oil to burn and do work in the dragging process, and the turbocharged diesel engine is enabled to quickly reach the designated rotating speed.
Further, when the running state of the off-road mobile vehicle is an acceleration state, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, the turbocharged diesel engine drives the ISG motor to output required power, and the power battery and the super capacitor provide a high-frequency part of transient variation in the required power.
Further, when the running state of the off-road mobile vehicle is deceleration braking, the engine controller controls the turbocharged diesel engine to cut off fuel, the ISG motor controller switches the working mode of the ISG motor to be a driving mode, part of braking energy drives the ISG motor to drag the turbocharged diesel engine to maintain a preset rotating speed for running, and redundant braking energy is absorbed by the power battery and the super capacitor.
Further, when the running state of the off-road mobile vehicle is that the vehicle is stopped after braking and decelerating, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, converts kinetic energy of inertial rotation of the turbocharged diesel engine into electric energy to charge the power battery, and simultaneously, the rotating speed of the turbocharged diesel engine is rapidly reduced to zero, and the running is ended.
The beneficial effects of the invention are as follows: the utility model provides a weak hybrid power system of non-road mobile vehicle, includes according to the running state of non-road mobile vehicle, the ISG motor controller is through switching over the mode of ISG motor, power battery with super capacitor cooperates the mode of ISG motor to make turbo charged diesel engine with the output of ISG motor reaches preset power or rotational speed data. The invention can effectively reduce the response lag time of the turbocharger, thereby improving the responsiveness of the power output of the engine and further improving the acceleration performance of the vehicle. And when the vehicle brakes, the regenerative braking energy is further absorbed, the energy utilization rate is improved, and meanwhile, the maneuvering performance of the vehicle is ensured.
The invention also solves the technical problems as follows:
a dynamic control method of a non-road mobile vehicle is based on the weak hybrid power system of the non-road mobile vehicle according to any one of the technical proposal,
according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor;
the power battery and the super capacitor are matched with the mode of the ISG motor, so that the output of the turbo-charged diesel engine and the ISG motor reaches the preset power or rotating speed data.
Further, according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor, and the power battery and the super capacitor cooperate with the mode of the ISG motor, so that the output of the turbocharged diesel engine and the ISG motor reaches the preset power or rotation speed data, and the method specifically comprises the following steps:
when the running state of the non-road mobile vehicle is that the vehicle is started, the ISG motor controller switches the working mode of the ISG motor into a driving mode, the extra power of the power battery is used for driving the ISG motor, the ISG motor drags the turbocharged diesel engine to start, and the engine controller transmits an oil injection signal to the turbocharged diesel engine, so that the turbocharged diesel engine is enabled to spray a proper amount of diesel oil to burn and do work in the dragging process, and the turbocharged diesel engine is enabled to quickly reach the designated rotating speed.
Further, according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor, and the power battery and the super capacitor cooperate with the mode of the ISG motor, so that the output of the turbocharged diesel engine and the ISG motor reaches the preset power or rotation speed data, and the method further specifically includes:
when the running state of the non-road mobile vehicle is an acceleration state, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, the turbocharged diesel engine drives the ISG motor to output required power, and the power battery and the super capacitor provide a high-frequency part with transient variation in the required power.
Further, according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor, and the power battery and the super capacitor cooperate with the mode of the ISG motor, so that the output of the turbocharged diesel engine and the ISG motor reaches the preset power or rotation speed data, and the method further specifically includes:
when the running state of the off-road mobile vehicle is deceleration braking, the engine controller controls the turbocharging diesel engine to cut off oil, the ISG motor controller switches the working mode of the ISG motor to be a driving mode, part of braking energy drives the ISG motor to drag the turbocharging diesel engine to maintain a preset rotating speed for running, and redundant braking energy is absorbed by the power battery and the super capacitor.
Further, according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor, and the power battery and the super capacitor cooperate with the mode of the ISG motor, so that the output of the turbocharged diesel engine and the ISG motor reaches the preset power or rotation speed data, and the method further specifically includes:
when the running state of the non-road mobile vehicle is that the vehicle is stopped after braking and decelerating, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, converts kinetic energy of inertial rotation of the turbocharged diesel engine into electric energy to charge the power battery, and simultaneously, the rotating speed of the turbocharged diesel engine is rapidly reduced to zero, and the running is finished.
Additional aspects 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
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the embodiments of the present invention or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic block diagram of a weak hybrid powertrain of an off-road mobile vehicle according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a dynamic control method for an off-road mobile vehicle according to another embodiment of the invention;
fig. 3 is a flowchart illustrating a dynamic control method of an off-road mobile vehicle according to another embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in fig. 1, a weak hybrid system of an off-road mobile vehicle includes a turbocharged diesel engine, an engine controller, an ISG motor controller, a super capacitor, a power cell, a DC/DC converter, a motor controller, and a side drive:
the turbocharged diesel engine is connected with the ISG motor through a shaft, the ISG motor is connected with a direct current bus through the ISG motor controller, the power battery is connected with the direct current bus after being connected with the super capacitor in parallel through the DC/DC converter, the rear end of the direct current bus is connected with the motor controller, the motor controller drives the motor to operate, and the motor drives wheels to operate through side transmission;
according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor, and the power battery and the super capacitor are matched with the mode of the ISG motor, so that the output of the turbo-charged diesel engine and the ISG motor reaches preset power or rotating speed data.
Based on the above embodiment, further, when the running state of the off-road mobile vehicle is that the vehicle starts, the ISG motor controller switches the working mode of the ISG motor to the driving mode, the extra power of the power battery is used to drive the ISG motor, the ISG motor drags the turbocharged diesel engine to start, and the engine controller transmits the fuel injection signal to the turbocharged diesel engine, so that the turbocharged diesel engine sprays a proper amount of diesel fuel to perform combustion work in the dragging process, and the turbocharged diesel engine rapidly reaches the specified rotation speed.
Further, when the running state of the off-road mobile vehicle is an acceleration state, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, the turbocharged diesel engine drives the ISG motor to output required power, and the power battery and the super capacitor provide a high-frequency part of transient variation in the required power.
Further, when the running state of the off-road mobile vehicle is deceleration braking, the engine controller controls the turbocharged diesel engine to cut off fuel, the ISG motor controller switches the working mode of the ISG motor to be a driving mode, part of braking energy drives the ISG motor to drag the turbocharged diesel engine to maintain a preset rotating speed for running, and redundant braking energy is absorbed by the power battery and the super capacitor.
Further, when the running state of the off-road mobile vehicle is that the vehicle is stopped after braking and decelerating, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, converts kinetic energy of inertial rotation of the turbocharged diesel engine into electric energy to charge the power battery, and simultaneously, the rotating speed of the turbocharged diesel engine is rapidly reduced to zero, and the running is ended.
The weak hybrid power system of the non-road mobile vehicle provided based on the embodiment comprises the following steps that according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor, and the power battery and the super capacitor are matched with the mode of the ISG motor, so that the output of the turbocharged diesel engine and the output of the ISG motor reach preset power or rotating speed data. The invention can effectively reduce the response lag time of the turbocharger, thereby improving the responsiveness of the power output of the engine and further improving the acceleration performance of the vehicle. And when the vehicle brakes, the regenerative braking energy is further absorbed, the energy utilization rate is improved, and meanwhile, the maneuvering performance of the vehicle is ensured.
As shown in fig. 2, a dynamic control method of an off-road mobile vehicle, based on the weak hybrid system of the off-road mobile vehicle according to any one of the above embodiments, includes the steps of:
110. according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor;
120. the power battery and the super capacitor are matched with the mode of the ISG motor, so that the output of the turbo-charged diesel engine and the ISG motor reaches the preset power or rotating speed data.
Further, when the running state of the off-road mobile vehicle is that the vehicle is started, the ISG motor controller switches the working mode of the ISG motor to a driving mode, the extra power of the power battery is used for driving the ISG motor, the ISG motor drags the turbocharged diesel engine to start, and the engine controller transmits an oil injection signal to the turbocharged diesel engine, so that the turbocharged diesel engine is enabled to spray a proper amount of diesel oil to burn and do work in the dragging process, and the turbocharged diesel engine is enabled to quickly reach the designated rotating speed.
Further, when the running state of the off-road mobile vehicle is an acceleration state, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, the turbocharged diesel engine drives the ISG motor to output required power, and the power battery and the super capacitor provide a high-frequency part of transient variation in the required power.
Further, when the running state of the off-road mobile vehicle is deceleration braking, the engine controller controls the turbocharged diesel engine to cut off oil, the ISG motor controller switches the working mode of the ISG motor to be a driving mode, part of braking energy drives the ISG motor to drag the turbocharged diesel engine to maintain a preset rotating speed for running, and redundant braking energy is absorbed by the power battery and the super capacitor.
Further, when the running state of the off-road mobile vehicle is that the vehicle is stopped after braking and decelerating, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, converts kinetic energy of inertial rotation of the turbocharged diesel engine into electric energy to charge the power battery, and simultaneously, the rotating speed of the turbocharged diesel engine is rapidly reduced to zero, and the running is ended.
It should be understood that, turbo-charged diesel engine passes through the hub connection with the ISG motor, and the ISG motor passes through motor controller and direct current bus connection, and power battery passes through DC/DC converter and super capacitor and connects with direct current bus after parallelly connected, and two motor controller are connected to direct current bus rear end, and two motor controller independently drive two motor operation respectively, and two side motors drive the wheel operation through the side transmission.
The whole vehicle system calculates the real-time oil injection quantity of the engine according to the running state of the vehicle, and transmits an oil injection signal to the turbocharged diesel engine through the engine controller so as to control the output power of the turbocharged diesel engine; the ISG motor adopts a permanent magnet synchronous motor, and an ISG motor controller can work in an inversion mode to control the ISG motor to drag the engine to start and also can work in a rectification mode to control the ISG motor to generate electricity; the power battery provides energy for the system in the pure electric running process of the vehicle, and outputs power for supplementing when the engine-generator set is difficult to meet the required power; the DC/DC converter is used for limiting the output and input power of the power battery and preventing the battery from being influenced by high-current charge and discharge; under the condition that the power of the power battery is limited, the super capacitor vehicle can provide high-frequency transient power when in driving, and absorb regenerative braking energy when the vehicle brakes, so that the peak clipping and valley filling effects are achieved on the whole vehicle system power flow.
In the weak mixing system, the turbocharged diesel engine is a main power source, the power of a power battery and the power of a super capacitor are smaller than those of an engine due to the limitation of the receptor volume and the weight, and the turbocharged diesel engine is only used as auxiliary power of a whole vehicle system.
As shown in fig. 3, the following is a description of the power output of the overall process from the start to the stop of the vehicle.
When the vehicle is started, the vehicle is in a pure electric acceleration running state, and the vehicle speed is lower in an initial stage, the required power of the whole vehicle is smaller than the maximum output power of the power battery, the ISG motor is switched into a driving mode in the stage, so that the extra power of the power battery is used for driving the ISG motor, the ISG motor drags the engine to start, and the engine is continuously dragged to run, and the engine controller transmits an oil injection signal to the engine, so that the engine is enabled to spray a proper amount of diesel oil to burn and do work in the dragging process of the motor, and the engine speed is rapidly increased. The method is beneficial to driving the turbocharger to build a certain boost pressure, and reduces the response lag time of the turbocharger, so that the dynamic response of the turbocharged diesel engine is improved, and the engine-generator set can well follow the change of the required power when the subsequent ISG motor is switched to the power generation state.
With the increase of the vehicle speed, the required power is continuously increased, when the required power is larger than the maximum output power of the battery, the ISG motor is switched to a power generation mode, as the engine speed is increased to the target speed and the turbocharger establishes a certain supercharging pressure, the turbocharged diesel engine drives the ISG motor to output enough electric power to meet the running requirement of the whole vehicle, and the power battery and the super capacitor are used for providing a high-frequency part with transient variation in the required power, so that the acceleration performance of the vehicle is ensured.
When the vehicle is braked in a decelerating way, the engine controller controls the engine to cut off fuel, the ISG motor controller is switched from a rectifying mode to an inversion mode, and a part of regenerative braking energy generated by the driving motor during braking of the vehicle is recovered and used for driving the ISG motor to drag the engine to maintain high-speed running, and the rest of braking energy is absorbed by the power battery and the super capacitor so as to supplement the energy consumed by the power battery and the super capacitor in a driving stage. Because the engine is required to overcome the factors such as compression resistance, friction resistance and the like of the engine to apply work after fuel cut, the rotating speed of the engine can be rapidly reduced, and if the following vehicle has a rapid acceleration requirement, the engine-generator set is difficult to output enough power in a short time, so that the ISG motor is utilized to maintain the high-rotating-speed operation of the engine, thereby being beneficial to ensuring the maneuvering performance of the vehicle.
When the vehicle is braked and decelerated and needs to accelerate, the ISG motor is switched into a power generation mode, the engine is in a high-rotation-speed state, the engine-generator set can timely meet the power requirement of the whole vehicle and can better follow the change of the required power, and the high-frequency part of the transient change in the required power is supplemented by the power battery and the super capacitor.
When the vehicle is braked and decelerated and then is required to stop, the ISG motor is switched into a power generation mode, kinetic energy of inertial rotation of the engine is converted into electric energy to charge the power battery, meanwhile, the rotating speed of the engine is rapidly reduced to zero, and the running is finished.
In summary, the above embodiments can effectively reduce the response delay time of the turbocharger, thereby improving the responsiveness of the engine power output and further improving the vehicle acceleration. And when the vehicle brakes, the regenerative braking energy is further absorbed, the energy utilization rate is improved, and meanwhile, the maneuvering performance of the vehicle is ensured.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium.
Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
The present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (7)
1. A weak hybrid system of an off-road mobile vehicle, the system comprising a turbocharged diesel engine, an engine controller, an ISG motor controller, a super capacitor, a power cell, a DC/DC converter, a motor controller and a side drive:
the turbocharged diesel engine is connected with the ISG motor through a shaft, the ISG motor is connected with a direct current bus through the ISG motor controller, the power battery is connected with the direct current bus after being connected with the super capacitor in parallel through the DC/DC converter, the rear end of the direct current bus is connected with the motor controller, the motor controller drives the motor to operate, and the motor drives wheels to operate through side transmission;
according to the running state of the off-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor, and the power battery and the super capacitor are matched with the mode of the ISG motor so that the output of the turbocharged diesel engine and the ISG motor reaches preset power or rotating speed data;
when the running state of the non-road mobile vehicle is that the vehicle is started, the ISG motor controller switches the working mode of the ISG motor into a driving mode, the extra power of the power battery is used for driving the ISG motor, the ISG motor drags the turbocharged diesel engine to start, and the engine controller transmits an oil injection signal to the turbocharged diesel engine, so that the turbocharged diesel engine is enabled to spray a proper amount of diesel oil to burn and do work in the dragging process, and the turbocharged diesel engine is enabled to quickly reach a specified rotating speed;
when the running state of the non-road mobile vehicle is an acceleration state, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, the turbocharged diesel engine drives the ISG motor to output required power, and the power battery and the super capacitor provide a high-frequency part of transient variation in the required power;
when the running state of the non-road mobile vehicle is that the vehicle is stopped after braking and decelerating, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, converts kinetic energy of inertial rotation of the turbocharged diesel engine into electric energy to charge the power battery, and simultaneously, the rotating speed of the turbocharged diesel engine is rapidly reduced to zero, and the running is finished.
2. The weak hybrid system of an off-road mobile vehicle of claim 1, wherein,
when the running state of the off-road mobile vehicle is deceleration braking, the engine controller controls the turbocharging diesel engine to cut off oil, the ISG motor controller switches the working mode of the ISG motor to be a driving mode, part of braking energy drives the ISG motor to drag the turbocharging diesel engine to maintain a preset rotating speed for running, and redundant braking energy is absorbed by the power battery and the super capacitor.
3. A dynamic control method of a non-road mobile vehicle based on the weak hybrid system of a non-road mobile vehicle according to claim 1 or 2, characterized in that,
according to the running state of the non-road mobile vehicle, the ISG motor controller switches the working mode of the ISG motor;
the power battery and the super capacitor are matched with the mode of the ISG motor, so that the output of the turbo-charged diesel engine and the ISG motor reaches the preset power or rotating speed data.
4. The method for controlling the dynamic performance of the off-road mobile vehicle according to claim 3, wherein the ISG motor controller switches the operation mode of the ISG motor according to the operation state of the off-road mobile vehicle, and the power battery and the super capacitor cooperate with the mode of the ISG motor to enable the output of the turbo diesel engine and the ISG motor to reach the preset power or rotation speed data, specifically comprising:
when the running state of the non-road mobile vehicle is that the vehicle is started, the ISG motor controller switches the working mode of the ISG motor into a driving mode, the extra power of the power battery is used for driving the ISG motor, the ISG motor drags the turbocharged diesel engine to start, and the engine controller transmits an oil injection signal to the turbocharged diesel engine, so that the turbocharged diesel engine is enabled to spray a proper amount of diesel oil to burn and do work in the dragging process, and the turbocharged diesel engine is enabled to quickly reach the designated rotating speed.
5. The method for controlling the dynamic performance of the off-road mobile vehicle according to claim 3, wherein the ISG motor controller switches the operation mode of the ISG motor according to the operation state of the off-road mobile vehicle, and the power battery and the super capacitor cooperate with the mode of the ISG motor to enable the output of the turbo diesel engine and the ISG motor to reach the preset power or rotation speed data, and further comprising the following steps:
when the running state of the non-road mobile vehicle is an acceleration state, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, the turbocharged diesel engine drives the ISG motor to output required power, and the power battery and the super capacitor provide a high-frequency part with transient variation in the required power.
6. The method for controlling the dynamic performance of the off-road mobile vehicle according to claim 3, wherein the ISG motor controller switches the operation mode of the ISG motor according to the operation state of the off-road mobile vehicle, and the power battery and the super capacitor cooperate with the mode of the ISG motor to enable the output of the turbo diesel engine and the ISG motor to reach the preset power or rotation speed data, and further comprising the following steps:
when the running state of the off-road mobile vehicle is deceleration braking, the engine controller controls the turbocharging diesel engine to cut off oil, the ISG motor controller switches the working mode of the ISG motor to be a driving mode, part of braking energy drives the ISG motor to drag the turbocharging diesel engine to maintain a preset rotating speed for running, and redundant braking energy is absorbed by the power battery and the super capacitor.
7. The method for controlling the dynamic performance of the off-road mobile vehicle according to claim 3, wherein the ISG motor controller switches the operation mode of the ISG motor according to the operation state of the off-road mobile vehicle, and the power battery and the super capacitor cooperate with the mode of the ISG motor to enable the output of the turbo diesel engine and the ISG motor to reach the preset power or rotation speed data, and further comprising the following steps:
when the running state of the non-road mobile vehicle is that the vehicle is stopped after braking and decelerating, the ISG motor controller switches the working mode of the ISG motor to a power generation mode, converts kinetic energy of inertial rotation of the turbocharged diesel engine into electric energy to charge the power battery, and simultaneously, the rotating speed of the turbocharged diesel engine is rapidly reduced to zero, and the running is finished.
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