CN114454955A - New energy automobile power steering control device - Google Patents

New energy automobile power steering control device Download PDF

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Publication number
CN114454955A
CN114454955A CN202210231216.3A CN202210231216A CN114454955A CN 114454955 A CN114454955 A CN 114454955A CN 202210231216 A CN202210231216 A CN 202210231216A CN 114454955 A CN114454955 A CN 114454955A
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China
Prior art keywords
engine
power
clutch
steering
new energy
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Withdrawn
Application number
CN202210231216.3A
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Chinese (zh)
Inventor
刘继广
张雪彦
武德起
王云飞
何璐
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Henan Mechanical and Electrical Vocational College
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Henan Mechanical and Electrical Vocational College
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Priority to CN202210231216.3A priority Critical patent/CN114454955A/en
Publication of CN114454955A publication Critical patent/CN114454955A/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0421—Electric motor acting on or near steering gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B62D5/046—Controlling the motor
    • B62D5/0463—Controlling the motor calculating assisting torque from the motor based on driver input
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/061—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle provided with effort, steering lock, or end-of-stroke limiters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/062—Details, component parts
    • B62D5/063—Pump driven by vehicle engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/062—Details, component parts
    • B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/10—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of power unit

Abstract

The invention relates to the technical field of new energy automobiles, and discloses a power steering control device of a new energy automobile, which solves the problems that the steering clearance of the existing new energy automobile steering structure can influence the steering accuracy and safety, the steering device comprises a main shaft, a transmission rod and a steering rod, wherein the top end of the main shaft is connected with a steering wheel, a steering power-assisted mechanism is arranged on the main shaft, a power-assisted controller is arranged at the bottom end of the steering power-assisted mechanism, the main shaft is connected with the transmission rod through a universal joint, the transmission rod is connected with the steering rod through a driving adjusting mechanism, the driving adjusting mechanism comprises a fixing clamping sleeve, a rack, an L-shaped limiting arm and a gear, the fixing clamping sleeve is connected with the steering rod through a plurality of bolts, the rack is connected to the bottom end of the fixing clamping sleeve, one end of the L-shaped limiting arm is sleeved at one end of the transmission rod, the L-shaped limiting arm is connected with one side of the fixing clamping sleeve, and the gear is connected with one end of the steering rod; the steering control device can eliminate the steering clearance and improve the steering safety and accuracy.

Description

New energy automobile power steering control device
Technical Field
The invention belongs to the technical field of new energy automobiles, and particularly relates to a power steering control device of a new energy automobile.
Background
Environmental pollution and energy crisis have become the focus of global attention. The method has the advantages of treating the automobile exhaust emission, improving the living environment of human beings, developing 'clean automobiles', and preventing the atmospheric condition from deteriorating, and has become the first difficult problem to be solved in the automobile industry. The fuel cell automobile is a new technology automobile using clean energy, namely hydrogen as new energy, and has the advantages of energy conservation, zero emission, no pollution, high efficiency, low noise and the like, so the fuel cell automobile is a key technology for solving the problems of energy and environmental protection. In recent years, with the vigorous development of new energy automobiles, the hydraulic power steering system commonly applied to the traditional automobile cannot meet the development requirement of the new energy automobiles due to the defects of large volume, complex structure, low efficiency and the like, and the development of a new power-assisted steering system becomes a common consensus in the future. At present, electronic control power-assisted steering systems which are being developed at home and abroad mainly comprise two main types, namely an electric hydraulic power-assisted steering system and an electric power-assisted steering system.
The electric hydraulic power-assisted steering system plays a role in starting and stopping as an intermediate product, can fully utilize the existing mature hydraulic power steering and control technology, can improve the working performance of the power-assisted steering system, reduce the energy consumption of the system, can provide larger power-assisted steering, has short lag time, can absorb the impact from the road surface, greatly reduces the development cost, shortens the development period and meets the development requirement of new energy automobiles.
The key technology and parts of the electric power steering system are not developed in a breakthrough manner, and at present, few electric power steering system products with mature technology are put to the market at home and need to be researched vigorously. Although electric power steering systems are the future development trend of power steering technology, the conventional hydraulic power steering technology is not fully utilized, and the conventional hydraulic feeling and steering road feeling are lost.
The new energy automobile is a future development trend, the driving energy of the new energy automobile is mainly a power battery, and a steering device of the new energy automobile cannot adopt a traditional hydraulic power-assisted mode driven by an engine. In addition, the existing new energy automobile steering structure has the possibility of steering clearance, the steering accuracy and safety are affected, the use effect is poor, and the power steering control device for supplying power to the new energy automobile with fuel oil and electric double-power assistance to maintain uninterrupted power of the new energy automobile and stably driving is not related to key technical breakthrough.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the new energy automobile power steering control device, which effectively solves the problems that the steering gap of the existing new energy automobile steering structure is possible, and the steering accuracy and safety are influenced, and can ensure that the power of the new energy automobile with fuel oil and electric double power assistance is provided to maintain the uninterrupted power requirement and stable driving of the new energy automobile.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a new energy automobile power steering control device, including main shaft, transfer line and steering column, the top and the steering wheel of main shaft are connected, be provided with on the main shaft and turn to assist the power device, turn to assist the bottom of power device and be provided with the helping hand controller, cooperate through the universal joint between main shaft and the transfer line to be connected, cooperate through drive adjustment mechanism between transfer line and the steering column to be connected, drive adjustment mechanism comprises fixed cutting ferrule, the rack, the spacing arm of L type and gear, fixed cutting ferrule passes through a plurality of bolts and steering column fixed connection, rack fixed connection is in the bottom of fixed cutting ferrule, the one end of transfer line is located to the one end movable sleeve of the spacing arm of L type, the spacing arm of L type and one side swing joint of fixed cutting ferrule, gear fixed connection is in the one end of steering column and meshes with the rack mutually.
Furthermore, the steering power-assisted mechanism comprises a support shell, an oil-electric double-hybrid engine, a driving gear and a driven gear, wherein one end of the support shell is connected with the automobile body, the oil-electric double-hybrid engine is fixedly connected to the middle position of the top end of the support shell, the driving gear is positioned in the support shell and is fixedly connected with an output shaft of the oil-electric double-hybrid engine, and the driven gear is fixedly sleeved on the main shaft and is meshed with the driving gear.
Furthermore, the power-assisted controller is fixedly connected with the supporting shell through a protective shell, and the power-assisted controller is electrically connected with the oil-electric hybrid engine and the pressure sensor.
Further, the hybrid electric-oil engine is a dual-power engine composed of an oil pump and a motor controlled by an automatic transmission, a computer readable medium is embedded in a power assisting controller for controlling the hybrid electric-oil engine in the steering power assisting mechanism, and the power steering control method realized by the computer readable medium embedded in the power assisting controller is as follows:
s1: the parameters of the oil-electricity hybrid engine and the motor parameters for providing hybrid power are monitored in real time, and the rotating speed omega of the engine is monitored in real time under different clutch loosening and closing stateseConstruction of real-time Motor Torque T under different Clutch Release statesmA change calculation model;
s2: constructing an engine clutch torque calculation model and calculating engine clutch torque Tc；
S3: calculating the motor torque T under different clutch loosening and closing states according to the step S1mAnd the launch clutch torque T obtained in the step S2cBuilding the Engine Torque TeCalculating the engine torque T caused by the power provided by the oil-electricity hybrid enginee：
Figure BDA0003540609310000031
Wherein S iseIs an engine inertia parameter, SmIs the motor inertia parameter, omegaeIs the engine speed, T, obtained by real-time monitoringeIs the engine torque, TmIs the motor torque, TcIs the engine clutch torque;
s4: the engine torque T calculated according to the step S3eConstructing an acceleration calculation model in the running process of the new energy automobile; judging whether the driving acceleration is in the range of the smooth driving threshold value or not, if so, sending a power supply instruction to the automatic transmission and the motor, otherwise, repeating the steps S1-S4 until the new energy sourceThe double-power generator of the automobile can output the acceleration for enabling the automobile to run stably.
Further, in the step S1, when the clutch is in different release/engagement states, the motor speed ω is setmThe following conditions are satisfied:
Figure BDA0003540609310000032
wherein V is the vehicle speed, EfFor final reduction gear ratio, EiIs the gear ratio of an automatic transmission, RaRadius of car tyre, omegaeMonitoring the obtained engine speed in real time;
the real-time motor torque T in the different clutch disengaged states in the step S1mThe change calculation model is as follows:
Figure BDA0003540609310000041
wherein, taumIs the motor time constant, TmdFor a given determined motor speed ωmdThe motor torque.
Further, the engine clutch torque T constructed in the step S2cAnd calculating the model as favorite:
Figure BDA0003540609310000042
where μ is the clutch coefficient of friction, n is the number of clutch plates, C is the area of clutch surface engagement when the clutch executes an engagement command, P is the pressure of the clutch surface when the clutch executes an engagement command, R is the pressure of the clutch surface when the clutch executes an engagement commandeIs the outer diameter of the clutch, RiIs the inner diameter.
Further, the acceleration calculation model in the driving process of the new energy vehicle constructed in the step S4 is as follows:
Figure BDA0003540609310000043
wherein a is the acceleration of the automobile, V is the speed obtained by real-time monitoring, and FRoadFor the road load monitored in real time in step S1, FBFor monitoring the resulting braking force of the engine output in real time in step S1, ScAs clutch inertia parameter, StFor an inertia parameter of the automatic transmission, SωAs wheel inertia parameters, M as vehicle mass, EfFor final reduction gear ratio, EiIs the gear ratio of an automatic transmission, RaIs the radius of an automobile tire;
further, the smooth driving threshold value range is 6-10m/s2。
Furthermore, a limiting sliding groove is formed in one side of the fixed cutting sleeve, and a limiting sliding block matched with the limiting sliding groove is arranged on one side, close to the fixed cutting sleeve, of the L-shaped limiting arm; and pressure sensors matched with the limiting sliding blocks are arranged at two ends of the inner part of the limiting sliding groove.
Furthermore, the bottom end of the L-shaped limiting arm is connected with the transmission rod in a matched mode through a first bearing; and one end of the transmission rod, which is close to the L-shaped limiting arm, is provided with a limiting clamping sleeve, the top end of the limiting clamping sleeve is provided with a flange plate, and the limiting clamping sleeve and the transmission rod are connected in a matching manner through a second bearing.
Compared with the prior art, the invention has the beneficial effects that:
1. in operation, through setting up the drive adjustment mechanism who constitutes by fixed cutting ferrule, rack, the spacing arm of L type and gear, can realize turning to the regulation through rack and pinion, effectively improve the accuracy nature of adjusting, avoid producing and turn to the clearance, and then improve nature controlled and security.
2. Through setting up the power-assisted steering mechanism who constitutes by support housing, oil-electricity double-mixing engine, drive gear and driven gear, can realize automatic power-assisted steering through electric drive's mode, improve the portability that turns to.
3. The invention monitors the engine speed omega in real timeeConstruction of real-time Motor Torque T under different Clutch Release statesmThe torque T of the force provided by the motor in the oil-electricity hybrid engine can be effectively held by a driver under different scene requirements by changing the calculation modelm(ii) a change in (c); then different engine clutch torques T are constructed according to the inner and outer diameter sizes, the number of plates and the friction coefficients of different engine clutchescThe calculation model can effectively enable the new energy automobile to adaptively and intensively learn the torque characteristics brought by the clutch of the new energy automobile;
4. the invention obtains the motor torque T under different clutch loosening and closing states according to calculationmAnd the resulting launch clutch torque TcBuilding the Engine Torque TeCalculating the engine torque T caused by the power provided by the oil-electricity hybrid engineeFurthermore, the influence of the engine force finally resulting in output brought by real-time parameters of motors such as different motor rotating speeds and the like and parameters of an engine clutch can be adjusted in real time, and further the engine torque T is reflectedeThe above step (1); and the speed and the road load F are obtained by monitoring the V of the automobile in real timeRoadBraking force F output from the engineB，ScAs clutch inertia parameter, StFor an inertia parameter of the automatic transmission, SωAs wheel inertia parameters, M as vehicle mass, EfFor final reduction gear ratio, EiCombining torque T of engine output for gear ratio of automatic transmissioneThe acceleration of new energy automobile under different application scenes can be obtained, and then whether the new energy automobile drives steadily is judged, the power supply steady handing-over of motor and oil pump is guaranteed to the steady moving that makes new energy automobile power control device's two power engines that mix of oil electricity, prolongs the life of battery, guarantees that new energy automobile drives the stationary performance higher, provides more superior comfort.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of the invention at A in FIG. 1;
FIG. 3 is a schematic structural view of a steering assist mechanism according to the present invention;
FIG. 4 is a schematic view of a connecting structure of a fixing clip sleeve and an L-shaped limiting arm according to the present invention;
in the figure: 1. a main shaft; 2. a transmission rod; 3. a steering lever; 4. a steering assist mechanism; 5. a power-assisted controller; 6. a universal joint; 7. a drive adjustment mechanism; 8. fixing the clamping sleeve; 9. a rack; 10. an L-shaped limiting arm; 11. a gear; 12. a bolt; 13. a limiting chute; 14. a limiting slide block; 15. a pressure sensor; 16. a first bearing; 17. a limiting clamping sleeve; 18. a flange plate; 19. a second bearing; 20. a support housing; 21. an oil-electric hybrid engine; 22. a drive gear; 23. a driven gear; 24. a protective shell.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 to 3, the steering device comprises a main shaft 1, a transmission rod 2 and a steering rod 3, wherein the top end of the main shaft 1 is connected with a steering wheel, a steering power-assisted mechanism 4 is arranged on the main shaft 1, a power-assisted controller 5 is arranged at the bottom end of the steering power-assisted mechanism 4, the main shaft 1 is connected with the transmission rod 2 in a matched manner through a universal joint 6, the transmission rod 2 is connected with the steering rod 3 in a matched manner through a driving adjusting mechanism 7, the driving adjusting mechanism 7 is composed of a fixed clamping sleeve 8, rack 9, the spacing arm of L type 10 and gear 11 constitute, fixed cutting ferrule 8 through a plurality of bolts 12 and steering column 3 fixed connection, rack 9 fixed connection is in fixed cutting ferrule 8's bottom, the one end movable sleeve of the spacing arm of L type 10 locates the one end of transfer line 2, the spacing arm of L type 10 and one side swing joint of fixed cutting ferrule 8, gear 11 fixed connection is in the one end of steering column 3 and meshes mutually with rack 9.
In the work, the driving adjusting mechanism consisting of the fixed clamping sleeve, the rack, the L-shaped limiting arm and the gear is arranged, so that the steering adjustment can be realized through the rack and the pinion, the adjusting accuracy is effectively improved, the steering gap is avoided, and the control performance and the safety are further improved; through setting up the power-assisted steering mechanism who constitutes by support housing, oil-electricity double-mixing engine, drive gear and driven gear, can realize automatic power-assisted steering through electric drive's mode, improve the portability that turns to.
Example 2
In addition to embodiment 1, as shown in fig. 1 and 3, the steering assist mechanism 4 includes a support housing 20, an oil-electric hybrid engine 21, a drive gear 22 and a driven gear 23, one end of the support housing 20 is connected to the vehicle body, the oil-electric hybrid engine 21, the drive gear 22 and the driven gear 23 can be supported, the oil-electric hybrid engine 21 is fixedly connected to the middle position of the top end of the support housing 20, the drive gear 22 is located inside the support housing 20 and is fixedly connected to the output shaft of the oil-electric hybrid engine 21, the drive gear 22 can be driven by the oil-electric hybrid engine 21 to rotate, the driven gear 23 is fixedly sleeved on the main shaft 1 and is meshed with the drive gear 22, the driven gear 23 can be driven by the drive gear 22 to rotate, the assist controller 5 is fixedly connected to the support housing 20 through a protective housing 24, the assist controller 5 is electrically connected to the oil-electric hybrid engine 21 and the pressure sensor 15, automatic power assistance can be achieved by the power assistance controller 5.
During turning, when the driver rotates the steering wheel, the electronic component inside the steering wheel senses the signal, then transmits the signal to the power-assisted controller 5, controls the oil-electricity double-mixing engine 21 to rotate through the power-assisted controller 5, so as to realize the turning power, the oil-electricity double-mixing engine 21 drives the driving gear 22 to rotate, thereby driving the driven gear 23 to rotate, and as the driven gear 23 is fixedly connected with the main shaft 1, the main shaft 1 can be driven to rotate, thereby realizing the turning power of an electric mode.
Example 3
On the basis of the embodiment 2, the hybrid electric-oil engine 21 is a dual-power engine consisting of an oil pump and a motor which are controlled by an automatic transmission, and the hybrid electric vehicle is a new energy vehicle with multiple power sources, has the advantages of high efficiency, low emission, oil-fuel ratio, power and specific energy of a pure electric vehicle, obviously improves the fuel economy and emission characteristics of the traditional vehicle, and also ensures the driving range of the pure electric vehicle.
The power steering control method is realized by a power steering controller 5 which controls an oil-electric hybrid engine in a steering power-assisted mechanism 4 and is internally provided with a computer readable medium, wherein the power steering control method is realized by the computer readable medium which is internally provided with the power steering controller 5 as follows:
s1: the method monitors the parameters of the gasoline-electric hybrid engine 21 and the motor parameters for providing hybrid power in real time, and monitors the engine rotating speed omega in real time under different clutch loosening and closing stateseConstruction of real-time Motor Torque T under different Clutch Release statesmA change calculation model;
s2: constructing an engine clutch torque calculation model and calculating engine clutch torque Tc；
S3: the motor torque T under different clutch release states is calculated according to the step S1mAnd launch clutch torque T obtained in step S2cBuilding the Engine Torque TeCalculating the engine torque T caused by the power provided by the oil-electricity hybrid enginee：
Figure BDA0003540609310000081
Wherein S iseIs an engine inertia parameter, SmIs the motor inertia parameter, ωeIs the engine speed, T, obtained by real-time monitoringeIs the engine torque, TmIs the motor torque, TcIs the engine clutch torque;
s4: the engine torque T calculated according to the step S3eConstructing an acceleration calculation model in the running process of the new energy automobile; judging whether the driving acceleration is within the range of the threshold value of the stable drivingIf yes, a power supply command is sent to the automatic transmission and the motor, otherwise, the steps S1-S4 are repeated until the double-power generator of the new energy automobile can output the acceleration for enabling the new energy automobile to run smoothly.
After the power-assisted controller 5 detects an ignition command of an automobile engine, a torque sensor on a steering shaft is detected, and when the automobile starts to drive and steer and a steering wheel rotates, the sensor converts the detected torque change into an electric signal and transmits the electric signal to the power-assisted controller 5; after the power-assisted controller 5 receives the signal, the optimal steering characteristic is calculated according to the input of the vehicle speed sensor, and the final output data is obtained; determining which control mode to use according to the engine speed signal and various steering conditions, and determining the action of the motor according to the control module and the output signal; the speed reduction mechanism amplifies the assist torque generated by the motor and provides assist force to the steered wheels through a mechanical device.
Example 4
In embodiment 3, in step S1, the motor speed ω is set in different release states of the clutchmThe following conditions are satisfied:
Figure BDA0003540609310000091
wherein V is the vehicle speed, EfFor final reduction gear ratio, EiIs the gear ratio of an automatic transmission, RaRadius of car tyre, omegaeMonitoring the obtained engine speed in real time;
the real-time motor torque T in the different clutch released states in step S1mThe change calculation model is as follows:
Figure BDA0003540609310000092
wherein, taumIs the motor time constant, TmdFor a given determined motor speed ωmdThe motor torque. The engine clutch torque T constructed in step S2cCalculation modelIf the method is fond of:
Figure BDA0003540609310000093
where μ is the clutch coefficient of friction, n is the number of clutch plates, C is the area of clutch surface engagement when the clutch executes an engagement command, P is the pressure of the clutch surface when the clutch executes an engagement command, R is the pressure of the clutch surface when the clutch executes an engagement commandeIs the outer diameter of the clutch, RiIs the inner diameter.
The acceleration calculation model in the driving process of the new energy automobile constructed in the step S4 is as follows:
Figure BDA0003540609310000094
wherein a is the acceleration of the automobile, V is the speed obtained by real-time monitoring, and FRoadFor the road load monitored in real time in step S1, FBFor monitoring the resulting braking force of the engine output in real time in step S1, ScAs clutch inertia parameter, SyFor an inertia parameter of the automatic transmission, SωAs wheel inertia parameters, M as vehicle mass, EfFor final reduction gear ratio, EiIs the gear ratio of an automatic transmission, RaThe radius of a car tyre.
As a preferred embodiment of the present invention, the smooth driving threshold range of the acceleration a of the automobile in embodiment 3 is 6 to 10m/s2。
Example 5
On the basis of embodiment 1, as shown in fig. 1, 2 and 4, one side of the fixing sleeve 8 is provided with a limiting chute 13, one side of the L-shaped limiting arm 10 close to the fixing sleeve 8 is provided with a limiting slider 14 matched with the limiting chute 13, so that the L-shaped limiting arm 10 can be limited, two ends inside the limiting chute 13 are respectively provided with a pressure sensor 15 matched with the limiting slider 14, so that the sensing can be realized after the direction is reached to the bottom, the damage of a steering device caused by overlarge stress is avoided, the bottom end of the L-shaped limiting arm 10 is matched and connected with the transmission rod 2 through a first bearing 16, the mobility between the L-shaped limiting arm 10 and the transmission rod 2 can be improved, one end of the transmission rod 2 close to the L-shaped limiting arm 10 is provided with a limiting sleeve 17, the top end of the limiting sleeve 17 is provided with a flange plate 18, the limiting sleeve 17 is matched and connected with the transmission rod 2 through a second bearing 19, the limiting of the transmission rod 2 can be realized, and the transmission rod 2 is prevented from deviating;
when turning to, main shaft 1 drives transfer line 2 through universal joint 6 and rotates, transfer line 2 drives gear 11 and rotates, drive rack 9 through gear 11 and remove, because realize the spacing to transfer line 2 through spacing cutting ferrule 17, thereby can make transfer line 2 fixed for the automobile body, thereby can make rack 9 move for gear 11, drive fixed cutting ferrule 8 through rack 9 and move, and then drive the function that the motion realization turned to of steering column 3 turned to, because gear 11 is the zonulae occludens structure with rack 9, consequently can effectively eliminate and turn to the clearance.
The steering control device adopts the oil-electricity hybrid engine, the engine runs at a lower rotating speed in the starting stage of the automobile, and the battery provides electric power for the motor to drive the motor to assist power; in the acceleration stage, the engine works normally, and meanwhile, the battery provides power for the motor to assist the automobile in accelerating; in the low-speed stage, the engine stops running, and the automobile runs in a pure electric state; in the deceleration stage, the engine stops running, and the motor is used as a generator to recover electric energy and is not influenced by the reverse dragging of the engine. The oil-electricity hybrid engine adopted by the invention can preferably adopt a parallel oil-electricity hybrid automobile, and has the advantages that the engine and the motor can directly transmit power to wheels without energy conversion loss like a series structure; the system has compact structure, the motor can be used as a generator and a motor, the automobile can be driven, and the energy generated by braking can be conveniently recovered.
The parallel hybrid electric vehicle adopts two driving systems of an engine and a motor to drive the vehicle, the engine and the motor are cooperatively driven, and when the vehicle is in different road conditions, the two driving components can drive the vehicle together or independently. When the automobile is started, the battery provides energy for the motor, the driving motor provides power, and the automobile is started; when the automobile needs to accelerate or climb a slope, the chemical energy of the fuel oil is transferred to the internal combustion engine to drive the automobile, the power battery provides electric power to drive the motor, and the engine and the motor provide power for the automobile together; when the automobile can maintain the driving requirement only by the engine, the motor can be used as a motor and a generator, the engine provides power for the motor, the electric power is used as the generator to generate electricity, and the battery is charged through the inverter.

Claims (10)

1. A new energy automobile power steering control device comprises a main shaft (1), a transmission rod (2) and a steering rod (3), and is characterized in that the top end of the main shaft (1) is connected with a steering wheel, a steering power assisting mechanism (4) is arranged on the main shaft (1), a power assisting controller (5) is arranged at the bottom end of the steering power assisting mechanism (4), the main shaft (1) is connected with the transmission rod (2) through a universal joint (6) in a matched manner, the transmission rod (2) is connected with the steering rod (3) through a driving adjusting mechanism (7) in a matched manner, the driving adjusting mechanism (7) is composed of a fixing clamping sleeve (8), a rack (9), an L-shaped limiting arm (10) and a gear (11), the fixing clamping sleeve (8) is fixedly connected with the steering rod (3) through a plurality of bolts (12), the rack clamping sleeve (9) is fixedly connected to the bottom end of the fixing clamping sleeve (8), one end of the L-shaped limiting arm (10) is movably sleeved on one end of the transmission rod (2), an L-shaped limiting arm (10) is movably connected with one side of the fixed clamping sleeve (8), and a gear (11) is fixedly connected with one end of the steering rod (3) and meshed with the rack (9).
2. The new energy automobile power steering control device according to claim 1, wherein the steering power-assisted mechanism (4) is composed of a support housing (20), an oil-electric hybrid engine (21), a driving gear (22) and a driven gear (23), one end of the support housing (20) is connected with the automobile body, the oil-electric hybrid engine (21) is fixedly connected to the middle position of the top end of the support housing (20), the driving gear (22) is located inside the support housing (20) and is fixedly connected with an output shaft of the oil-electric hybrid engine (21), and the driven gear (23) is fixedly sleeved on the main shaft (1) and is meshed with the driving gear (22).
3. The new energy automobile power steering control device is characterized in that the power-assisted controller (5) is fixedly connected with the support shell (20) through a protective shell (24), and the power-assisted controller (5) is electrically connected with the oil-electric hybrid engine (21) and the pressure sensor (15).
4. The new energy automobile power steering control device according to claim 2, wherein the hybrid electric-oil engine (21) is a hybrid electric-oil engine composed of an oil pump and a motor controlled by an automatic transmission, a power controller (5) for controlling the hybrid electric-oil engine in the steering power-assisted mechanism (4) is provided with a computer readable medium therein, and the power steering control method implemented by the computer readable medium provided in the power controller (5) is as follows:
s1: the parameters of the oil-electricity hybrid engine (21) and the parameters of a motor providing hybrid power are monitored in real time, and the rotating speed omega of the engine is monitored in real time under different clutch loosening and closing stateseConstruction of real-time Motor Torque T under different Clutch Release statesmA change calculation model;
s2: constructing an engine clutch torque calculation model and calculating engine clutch torque Tc；
S3: calculating the motor torque T under different clutch loosening and closing states according to the step S1mAnd the launch clutch torque T obtained in the step S2cBuilding the Engine Torque TeCalculating the engine torque T caused by the power provided by the oil-electricity hybrid enginee：
Figure FDA0003540609300000021
Wherein S iseIs an engine inertia parameter, SmIs the motor inertia parameter, omegaeIs the engine speed, T, obtained by real-time monitoringeIs the engine torque, TmIs the motor torque, TcIs the engine clutch torque;
s4: the engine torque T calculated according to the step S3eConstruction ofAn acceleration calculation model in the driving process of the new energy automobile; and judging whether the driving acceleration is within the range of the smooth driving threshold value, if so, sending a power supply instruction to the automatic transmission and the motor, otherwise, repeating the steps S1-S4 until the double-power generator of the new energy automobile can output the acceleration for enabling the new energy automobile to run smoothly.
5. The new energy vehicle power steering control device according to claim 4, wherein in the step S1, the motor speed ω is at different open and close states of the clutch, and the motor speed ω is at different open and close states of the clutchmThe following conditions are satisfied:
Figure FDA0003540609300000022
wherein V is the vehicle speed, EfFor final reduction gear ratio, EiIs the gear ratio of an automatic transmission, RaRadius of car tyre, omegaeMonitoring the obtained engine speed in real time;
the real-time motor torque T in the different clutch disengaged states in the step S1mThe change calculation model is as follows:
Figure FDA0003540609300000023
wherein, taumIs the motor time constant, TmdFor a given determined motor speed ωmdThe motor torque.
6. The new energy vehicle power steering control device according to claim 4, wherein the engine clutch torque T constructed in the step S2cAnd calculating the model as favorite:
Figure FDA0003540609300000031
where μ is the clutch coefficient of friction, n is the number of clutch plates, C is the area of clutch surface engagement when the clutch executes an engagement command, P is the pressure of the clutch surface when the clutch executes an engagement command, R is the pressure of the clutch surface when the clutch executes an engagement commandeIs the outer diameter of the clutch, RiIs the inner diameter.
7. The new energy vehicle power steering control device according to claim 4, wherein the acceleration calculation model during driving of the new energy vehicle constructed in the step S4 is as follows:
Figure FDA0003540609300000032
wherein a is the acceleration of the automobile, V is the speed obtained by real-time monitoring, and FRoadFor the road load monitored in real time in step S1, FBFor monitoring the resulting braking force of the engine output in real time in step S1, ScAs clutch inertia parameter, StFor an inertia parameter of the automatic transmission, SωAs wheel inertia parameters, M as vehicle mass, EfFor final reduction gear ratio, EiIs the gear ratio of an automatic transmission, RaThe radius of a car tyre.
8. The new energy automobile power steering control device according to claim 4, wherein the smooth driving threshold range is 6-10m/s2。
9. The new energy automobile power steering control device according to claim 1, characterized in that a limiting sliding groove (13) is formed in one side of the fixing sleeve (8), and a limiting sliding block (14) matched with the limiting sliding groove (13) is arranged on one side of the L-shaped limiting arm (10) close to the fixing sleeve (8); and pressure sensors (15) matched with the limiting sliding blocks (14) are arranged at two ends of the interior of the limiting sliding groove (13).
10. The new energy automobile power steering control device is characterized in that the bottom end of the L-shaped limiting arm (10) is connected with the transmission rod (2) in a matched mode through a first bearing (16); one end of the transmission rod (2) close to the L-shaped limiting arm (10) is provided with a limiting clamping sleeve (17), the top end of the limiting clamping sleeve (17) is provided with a flange plate (18), and the limiting clamping sleeve (17) is connected with the transmission rod (2) in a matched mode through a second bearing (19).
CN202210231216.3A 2022-03-10 2022-03-10 New energy automobile power steering control device Withdrawn CN114454955A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115158450A (en) * 2022-08-09 2022-10-11 一汽解放青岛汽车有限公司 Automobile power steering device and power steering control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115158450A (en) * 2022-08-09 2022-10-11 一汽解放青岛汽车有限公司 Automobile power steering device and power steering control method
CN115158450B (en) * 2022-08-09 2023-11-10 一汽解放青岛汽车有限公司 Automobile steering power assisting device and steering power assisting control method

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Application publication date: 20220510