CN109177741A - A kind of new-energy automobile acceleration energy-saving control method - Google Patents
A kind of new-energy automobile acceleration energy-saving control method Download PDFInfo
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- CN109177741A CN109177741A CN201810841281.1A CN201810841281A CN109177741A CN 109177741 A CN109177741 A CN 109177741A CN 201810841281 A CN201810841281 A CN 201810841281A CN 109177741 A CN109177741 A CN 109177741A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/14—Acceleration
- B60L2240/16—Acceleration longitudinal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/46—Drive Train control parameters related to wheels
- B60L2240/461—Speed
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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
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a kind of new-energy automobiles to accelerate energy-saving control method, the following steps are included: after receiving assisted instruction, new-energy automobile current vehicle wheel rotational speed and acceleration are obtained, while obtaining vehicle insulation resistance, the SOC of power battery and accelerator pedal aperture to control the air-conditioning of new-energy automobile；Corresponding expected acceleration is determined according to the current vehicle wheel rotational speed of the new-energy automobile；Driving signal is adjusted according to the current acceleration of the new-energy automobile and the expected acceleration, and the driving signal after adjusting is exported to the motor driver of the new-energy automobile.The present invention adjusts driving signal according to the real-time vehicle wheel rotational speed of new-energy automobile and acceleration, the working condition of automatic control motor, new-energy automobile is set to realize stable accelerating ability under the smallest operating current, adjust vehicle air conditioning in real time simultaneously, avoid improper causes to waste battery capacity due to output power of motor is excessive because artificially accelerating to control, battery is extended, the cruising ability of new-energy automobile is improved.
Description
Technical field
The invention belongs to technical field of new energy, and in particular to a kind of new-energy automobile acceleration energy-saving control method.
Background technique
The features such as new-energy automobiles such as electric car are inexpensive, environmentally friendly, energy saving by its starts gradually to popularize.In new energy vapour
Che Zhong, identical driving motor and battery can cause cruising ability will appear different because of the difference of driver and Car design
Situation.Wherein, the bad steering habit of driver seriously affects the cruising ability and battery life of new-energy automobile.In vehicle plus
When fast, vehicle accelerated condition is judged by driver entirely.The shortcomings that this control mode is that acceleration is felt with the subjectivity of driver entirely
Feel, if driver is too small to the driving signal of motor when vehicle accelerates, vehicle can be caused to accelerate because of motor driving force deficiency
Slowly or can not accelerate；It will lead to that motor driven battery current is excessive, this will seriously reduce battery again if driving signal is excessive
Service life and cruising ability.
With the development of new-energy automobile market, pure electric automobile is required in terms of course continuation mileage and riding comfort
Higher and higher, air-conditioning is the main power consuming device of pure electric automobile, accounts for about the one third of vehicle electricity consumption.Traditional controlling party
Method mainly considers from air-conditioning self-view, the benchmark only adjusted using vehicle interior temperature as running state of air conditioner, raising comfortably
Vehicle continual mileage is affected when property.And when vehicle electricity is lower in order to there is enough electrical energy drive automobiles to arrive at the destination,
The way for directly closing air-conditioning is generally taken, affects the riding comfort of passenger again when improving vehicle continual mileage in this way,
It can not achieve balance optimizing on energy conservation and comfort.
It is relatively low in vehicle insulation resistance but when still in safety value range or power battery for pure electric automobile
SOC is lower but when still ensuring that normal enforcement, stops or drops power as far as possible for the nonessential electrical appliance of vehicle and use so that vehicle
It can safely reach to destination；In addition, electrokinetic cell system electric discharge is big, when pure electric automobile accelerates or overtakes other vehicles to exempt from power
Battery system overdischarge, the electrical appliance for needing vehicle nonessential stops or drop power uses.Traditional air conditioning for automobiles control is basic
On be independent control, there is no an information interchange with whole-control system, or even if air conditioner manipulator and entire car controller have information friendship
Stream, but the associated control logic between accelerator pedal aperture, the SOC state of power battery, vehicle insulation resistance is not set up,
Lead to not realize energy conservation and comfort and the balance optimizing in terms of extending the power battery service life.
Summary of the invention
Goal of the invention: the present invention aiming at the shortcomings in the prior art, proposes that a kind of new-energy automobile accelerates Energy Saving Control side
Method, avoid because artificially accelerate to control it is improper cause to waste battery capacity due to output power of motor is excessive, extend battery use
Service life improves the cruising ability of new-energy automobile.
A kind of technical solution: new-energy automobile acceleration energy-saving control method of the present invention, comprising the following steps:
After receiving assisted instruction, new-energy automobile current vehicle wheel rotational speed and acceleration are obtained, while obtaining whole
Vehicle insulation resistance, the SOC of power battery and accelerator pedal aperture are to control the air-conditioning of new-energy automobile；
Corresponding expected acceleration is determined according to the current vehicle wheel rotational speed of the new-energy automobile；
Driving signal is adjusted according to the current acceleration of the new-energy automobile and the expected acceleration, and will be after adjusting
Driving signal export to the motor driver of the new-energy automobile.
Further, the driving signal be pwm signal, according to the current acceleration of the new-energy automobile with it is described pre-
Phase acceleration adjust pwm signal process the following steps are included:
If the current acceleration of the new-energy automobile is less than the expected acceleration, increase accounting for for the pwm signal
Empty ratio；If the current acceleration of the new-energy automobile is greater than or equal to the expected acceleration, the pwm signal is kept
Duty ratio it is constant.
Further, after receiving assisted instruction, the current body sway angle of the new-energy automobile is also obtained, and
The drive is adjusted according to the current acceleration of the new-energy automobile, current body sway angle and the expected acceleration
Dynamic signal；
The driving signal is pwm signal；According to the current acceleration of the new-energy automobile, current body sway angle
Degree and the expected acceleration adjust the driving signal process the following steps are included:
If the current acceleration of the new-energy automobile is less than the expected acceleration, and according to current body sway
Angle determines that the new-energy automobile is in descent run state, then the duty ratio of pwm signal is increased by the first regulated value；
If the current acceleration of the new-energy automobile is less than the expected acceleration, and according to current body sway
Angle determines that the new-energy automobile is in flat pavement running state, then the duty ratio of pwm signal is increased by the second regulated value；
If the current acceleration of the new-energy automobile is less than the expected acceleration, and according to current body sway
Angle determines that the new-energy automobile is in up-hill journey state, then the duty ratio of pwm signal is increased third regulated value.
Further, the air-conditioning for controlling new-energy automobile includes the following steps:
When receive operation of air conditioner request when, according to the vehicle insulation resistance, the power battery SOC and it is described plus
Speed pedal aperture adjusts the operating status of the air-conditioning, wherein and described when the SOC of the power battery is greater than first threshold
Vehicle insulation resistance is greater than second threshold, and when the accelerator pedal aperture is less than or equal to default aperture, controls the air-conditioning
It is run with normal operation mode；
When the SOC of the power battery is greater than third threshold value and is less than or equal to the first threshold and the vehicle insulate
Resistance is greater than the 4th threshold value or the accelerator pedal aperture is greater than the default aperture and the vehicle insulation resistance is greater than described
When four threshold values, the air-conditioning is controlled to limit power mode of operation operation；
When the SOC of the power battery is less than or equal to less than or equal to the third threshold value or the vehicle insulation resistance
When four threshold value, forbid the operation of air conditioner.
Further, controlling the air-conditioning with normal operation mode operation further comprises:
Obtain current environmental temperature and current vehicle interior temperature；In the air conditioner refrigerating, if the current environmental temperature
Less than or equal to the first temperature threshold, the air-conditioning is controlled with third Power operation, or in the air-conditioning heating, if institute
Current environmental temperature is stated more than or equal to second temperature threshold value, controls the air-conditioning with third Power operation；
In the air conditioner refrigerating, if the current environmental temperature is greater than first temperature threshold, further compare
The difference of the current vehicle interior temperature and preset temperature, or in the air-conditioning heating, if the current environmental temperature
Less than the second temperature threshold value, then the further difference of the current vehicle interior temperature and preset temperature；
If the absolute value of the difference is greater than the first preset difference value, the air-conditioning is controlled with the first Power operation；Such as
The absolute value of difference described in fruit is greater than the second preset difference value and is less than first preset difference value, then controls the air-conditioning with second
Power operation；
If the absolute value of the difference is less than second preset difference value, the air-conditioning is controlled with third power fortune
Row, wherein first power is greater than second power, and second power is greater than the third power.
Further, the operation power of the limit power mode of operation is equal to the third power.
Further, 26~30 DEG C of first temperature threshold, the second temperature threshold value be 8~12 DEG C, described first
Preset difference value is 3~6 DEG C, and second preset difference value is 1~3 DEG C.
Accelerate energy-saving control device the invention also discloses a kind of new-energy automobile, including trigger device, new for detecting
The wheel speed sensors of the vehicle wheel rotational speed of energy automobile, acceleration for detecting the new-energy automobile acceleration transducer with
And control device；The trigger device, the wheel speed sensors, the acceleration transducer connect with the control device respectively
It connects；The control device is connect with the motor driver of the new-energy automobile；Assisted instruction is received in the trigger device
Afterwards, the control device determines corresponding expected acceleration according to current vehicle wheel rotational speed, and according to the new-energy automobile
Current acceleration and the expected acceleration adjust driving signal, and the driving signal after adjusting is exported to the new energy
The motor driver of automobile.
Further, the wheel speed sensors are Hall sensor.
Further, the acceleration transducer is the acceleration and body sway for detecting the new-energy automobile
The six-axle acceleration sensor of angle.
The utility model has the advantages that the present invention adjusts driving signal according to the real-time vehicle wheel rotational speed of new-energy automobile and acceleration, from
The working condition of dynamic control motor, makes new-energy automobile realize stable accelerating ability under the smallest operating current, while real
When adjust vehicle air conditioning, avoid because artificially accelerate to control it is improper cause to waste battery capacity due to output power of motor is excessive, prolong
Battery has been grown, the cruising ability of new-energy automobile is improved.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with preferred embodiment.Obviously, described below
The examples are only for explaining the invention, rather than limitation of the invention.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment 1
The energy saving accelerated method of the new-energy automobile of the present embodiment can be executed by control device, such as single-chip microcontroller.This
The energy saving accelerated method of new-energy automobile in embodiment the following steps are included:
Step S110 obtains new-energy automobile current vehicle wheel rotational speed and acceleration, together after receiving assisted instruction
When obtain vehicle insulation resistance, the SOC of power battery and accelerator pedal aperture to control the air-conditioning of new-energy automobile；
It, can be to control device when encountering the situation for needing to accelerate during driver drives new-energy automobile
Assisted instruction is issued, such as in a kind of optional mode, when driver steps on the accelerator pedal of new-energy automobile, accelerates to step on
Plate work, control device judgement receive assisted instruction.Some other triggering dresses can also be set certainly in new-energy automobile
It sets, after driver operates this trigger device, control device, which can determine that, receives assisted instruction.Control device is receiving acceleration
After instruction, the vehicle wheel rotational speed and acceleration of new-energy automobile can be obtained, to carry out acceleration automatic control.
Step S120 determines corresponding expected acceleration according to current vehicle wheel rotational speed；
The travel speed of new-energy automobile can be determined according to the parameter of vehicle wheel rotational speed and wheel itself, and for each speed
Section is spent, has a preferably new-energy automobile acceleration value, when the current travel speed of new-energy automobile is in this speed area
Between when accelerated according to this acceleration value, be not only able to satisfy vehicle acceleration request, but also be avoided that due to moment, output power was excessive
Caused battery capacity waste.Specifically, by the way that the corresponding preferable acceleration value of each speed interval can be calculated by poor method,
Then it is verified by dynamometer machine and road test, determines that the corresponding expected acceleration of each speed interval, the expection acceleration are
For best acceleration.Since vehicle wheel rotational speed is corresponding with the travel speed of new-energy automobile, each speed interval and wheel
Revolving speed section is corresponding, and the corresponding expected acceleration in each vehicle wheel rotational speed section, obtains new-energy automobile in control device
After current vehicle wheel rotational speed, corresponding expected acceleration can be found according to this corresponding relationship.
Step S130 adjusts driving signal according to the current acceleration of the new-energy automobile and the expected acceleration,
And the driving signal after adjusting is exported to the motor driver of the new-energy automobile.
Control device is after determining expected acceleration, so that it may (be added in real time according to the current acceleration of new-energy automobile
Speed) it is compared with expected acceleration, and driving signal is adjusted according to comparing result, then by the driving after adjusting
Signal is exported to the motor driver of new-energy automobile, is realized and is accelerated to automatically control.
Preferably, to detect whether driving signal normally exports when driving signal is adjusted in control device, if
There is exception, then stops driving, and generate prompt information, to remind driver.
In a kind of optional embodiment, driving signal is pwm signal, PWM (Pulse Width Modulation,
Pulse width modulation) it is a kind of very effective skill using the numeral output of microprocessor to be controlled analog circuit
Art is widely used in from measurement, communicates into many fields of power control and transformation.In the present embodiment, control device is defeated
For pwm signal to the motor driver of new-energy automobile, motor driver can realize the adjustment to motor speed out.It is controlling
When motor, power supply is simultaneously discontinuous to motor power supply, but is in the form of square-wave pulse under a specific frequency
Motor provides electric energy, and the pwm signal of different duty can play the role of speed regulation to motor, this is because motor is actually one
Big inductance, it has the ability for hindering input current and voltage jump, therefore pwm signal is averaged and is assigned on action time, this
The duty ratio that sample changes input pwm signal can change the voltage swing for being added in motor both ends, to change motor speed.
The efficiency situation that motor and motor driver are used according to new-energy automobile, is obtained electronic by dynamometer machine and road test
Vehicle corresponding preferred drive electric current under each expected acceleration, can be obtained the pwm signal of preferable duty ratio.In embodiment
In one, according to the current acceleration of new-energy automobile and expected acceleration adjust pwm signal process the following steps are included:
Step S131, judges whether the current acceleration of new-energy automobile is less than expected acceleration, if so, entering step
S132；If it is not, then entering step S133；
Step S132 increases the duty ratio of pwm signal；
Step S133 keeps the duty ratio of pwm signal constant.
Specifically, the duty ratio of pwm signal can be arranged to different grades, if the current acceleration of new-energy automobile is less than
It is expected that acceleration, then the duty ratio of pwm signal is increased a grade and exported to motor driver, energy new in this way by control device
The real time acceleration of source automobile will increase, and then judge the size of new-energy automobile real time acceleration and expected acceleration again, if
Real time acceleration is still less than expected acceleration, then the duty ratio of pwm signal is increased a grade again by control device, until new energy
The acceleration of source automobile is greater than or equal to expected acceleration.The work for controlling motor in this way, makes new-energy automobile exist
Stable accelerating ability is realized under the smallest operating current, is avoided and is accelerated control is improper to lead to output power of motor mistake because artificial
Battery capacity is wasted greatly, battery is extended, improves the cruising ability of new-energy automobile.
Further, the acceleration side in the energy saving accelerated method and traditional technology in order to make the new-energy automobile of the present embodiment
Method can be distinguished effectively, and the present embodiment also provides model selection function, i.e., energy-saving mode is arranged in new-energy automobile, work as new energy
When automobile is in energy-saving mode, driver's bend the throttle (or using other triggering modes), control device judgement is received
Assisted instruction, then can obtain the vehicle wheel rotational speed and acceleration of new-energy automobile, and carry out acceleration automatic control accordingly.
If new-energy automobile is not at energy-saving mode, when driver's bend the throttle, still according to traditional acceleration control method into
Scanning frequency degree is adjusted.
Preferably, also settable overcurrent protection mechanism in the present embodiment, when new-energy automobile is in energy-saving mode, setting
The control method and state of each port, then judge whether there is overcurrent protection signal, if it exists overcurrent protection in control device
Signal, then no matter driver whether bend the throttle (or use other triggering modes), not will do it acceleration and automatically control.
Further, more meet practical driving situation, new energy of the invention to control the acceleration of new-energy automobile
The energy saving accelerated method of automobile also introduces this controlling elements of body sway angle when carrying out accelerating to automatically control.
The specific control method of air-conditioning includes: in the embodiment
Step S101 obtains the SOC and accelerator pedal aperture of vehicle insulation resistance, power battery.In other words, which is
Detect state of insulation, vehicle SOC state and the accelerator pedal aperture of vehicle.
Step S102, when receiving operation of air conditioner request (such as driver presses air-conditioning switch, and air-conditioning is opened in request),
The operating status of air-conditioning is adjusted according to vehicle insulation resistance, the SOC of power battery and accelerator pedal aperture.Specifically, the step
Suddenly it further includes steps of
Step S103, when power battery SOC be greater than first threshold, and vehicle insulation resistance be greater than second threshold, and add
When speed pedal aperture is less than or equal to default aperture, control air-conditioning is run with normal operation mode.Specifically, the step is further
The following steps are included:
Step 1: obtaining current environmental temperature and current vehicle interior temperature.
Step 2: in air conditioner refrigerating, if current environmental temperature be less than or equal to the first temperature threshold, control air-conditioning with
Third Power operation, or in air-conditioning heating, if current environmental temperature is greater than or equal to second temperature threshold value, control air-conditioning
With third Power operation.
Step 3: further relatively more current if current environmental temperature is greater than the first temperature threshold in air conditioner refrigerating
The difference of vehicle interior temperature and preset temperature, or in air-conditioning heating, if current environmental temperature is less than second temperature threshold value,
The further difference of more current vehicle interior temperature and preset temperature.
Step 4: if the absolute value of the difference of current vehicle interior temperature and preset temperature is greater than the first preset difference value, controlling
Air-conditioning is with the first Power operation.
Step 5: if the absolute value of the difference of current vehicle interior temperature and preset temperature is greater than the second preset difference value and is less than
First preset difference value controls air-conditioning then with the second Power operation.
Step 6: if the absolute value of the difference of current vehicle interior temperature and preset temperature is controlled less than the second preset difference value
The air-conditioning is with third Power operation.
Wherein, in the examples described above, the first power is greater than the second power, and the second power is greater than third power.Comparatively,
It is to be understood that the first power be it is high-power, the second power be mid power, third power be small-power.
Step S104, when the SOC of power battery is greater than third threshold value and is less than or equal to first threshold and vehicle insulated electro
Resistance is greater than the 4th threshold value or accelerator pedal aperture greater than default aperture and when vehicle insulation resistance is greater than four threshold values, and control is empty
It adjusts to limit power mode of operation operation.Wherein, in one embodiment of the invention, the operation power etc. of power mode of operation is limited
In third power, i.e. small-power.
Step S105 is less than or equal to the when the SOC of power battery is less than or equal to third threshold value or vehicle insulation resistance
When four threshold values, forbid operation of air conditioner.
Wherein, in some examples of the invention, for example, above-mentioned first threshold is 30%, third threshold value is 20%, the
One temperature threshold is 26~30 DEG C, and second temperature threshold value is 8~12 DEG C, and the first preset difference value is 3~6 DEG C, the second preset difference value
It is 1~3 DEG C, default aperture is, for example, 80%.First power (high-power) is, for example, the 70%~100% of air-conditioning maximum power,
Second power (air-conditioning mid power) is, for example, the 50%~70% of air-conditioning maximum power, and third power (small-power) is for example small
In the 50% of air-conditioning maximum power.
In this example, method includes the following steps:
Step S1: ignition key switch goes to ON grades from OFF grades, and vehicle low pressure powers on, and entire car controller self-test is completed just
Beginningization parameter.
Step S2: ignition key switch from ON grades go to START grades after, entire car controller judges whether that meeting high pressure powers on
Condition, if so, S3 is thened follow the steps, if not, thening follow the steps S4.
Step S3: high pressure main contactor closure, vehicle high pressure power on.
Step S4: vehicle high pressure does not power on, fault alarm.
Step S5: after vehicle high pressure powers on, entire car controller analyzes and determines vehicle SOC (remaining capacity) information, vehicle
State of insulation information and accelerator pedal opening information.After driver opens air conditioner power switch, air-conditioning carries out self-test, and self-test is complete
Bi Hou, entire car controller according to vehicle SOC (remaining capacity) information, vehicle state of insulation information, accelerator pedal opening information, when
Preceding ambient temperature information and current vehicle interior temperature information control the operating status of air-conditioning.Specifically includes the following steps:
Step S501: if the SOC of power battery is higher than first threshold C0, and vehicle insulation resistance is higher than second threshold
Y0, and accelerator pedal aperture is not more than default aperture D0, then vehicle control unit controls air-conditioning is run with normal operation mode.The step
It is rapid specifically includes the following steps:
Step S5011: if current environmental temperature is no more than the first temperature threshold K3 (when refrigeration) or not less than the second temperature
It spends threshold k 5 (when heating), and entire car controller output allows the high-power signal using air-conditioning, then air-conditioning is with small-power (third
Power) operation.Step S5012: if current environmental temperature is greater than the first temperature threshold K3 (when refrigeration) or is less than second temperature
Threshold k 5 (when heating), then difference between more current vehicle interior temperature K1 and preset temperature K0.
Step S5013: if K1-K0 > a (refrigeration) or K0-K1 > a (heating), and entire car controller output permission would be high-power
Using the signal of air-conditioning, then air-conditioning is run with high-power (the first power).Wherein, a is the first preset difference value, and b is second default
Difference.
Step S5014: if a > K1-K0 > b (refrigeration) or a > K0-K1 > b (heating), and entire car controller output allows big function
Rate uses the signal of air-conditioning, then air-conditioning is with mid power (the second power) operation, to realize that refrigerating capacity is balanced with energy consumption.
Step S5015: if K1-K0 < b (refrigeration) or a > K0-K1 < b (heating), and entire car controller output allows big function
Rate uses the signal of air-conditioning, then air-conditioning is with small-power (third power) operation, at this time with Energy Conservation long battery life for main syllabus
's.
Embodiment 2
The energy saving accelerated method of the new-energy automobile of the present embodiment can still be executed by control device, such as single-chip microcontroller.This
The energy saving accelerated method of new-energy automobile in embodiment the following steps are included:
Step S210, after receiving assisted instruction, the vehicle wheel rotational speed, acceleration and vehicle body for obtaining new-energy automobile incline
Rake angle；
Step S220 determines corresponding expected acceleration according to current vehicle wheel rotational speed；
Step S230 adds according to the current acceleration of the new-energy automobile, current body sway angle and expection
Speed adjusts driving signal, and driving signal is exported to the motor driver of the new-energy automobile.
Specifically, when the acceleration for realizing new-energy automobile automatically controls, being considered not only current in the present embodiment two
Vehicle wheel rotational speed, it is also contemplated that body sway angle, by body sway angle may determine that new-energy automobile traveling in vehicle body
The states such as state, including overturning, up-hill journey, descent run and flat pavement running.New energy is determined when passing through body sway angle
When source automobile is in overturning state, no matter driver whether step on the accelerator, all will not output drive signal to motor driven
Device can cause severity of injuries to expand to avoid when overturning because of the flurried operation of driver in this way.When passing through body sway
It, then can be according to upper one embodiment when angle determines that new-energy automobile is in normally travel state (upward slope, level road or descending)
The adjusting method of middle offer automatically adjusts driving signal, and exports to the motor driver of new-energy automobile, to realize new energy
The acceleration of source automobile automatically controls, and avoids improper causing to waste battery electricity due to output power of motor is excessive because artificially accelerating to control
Amount.
Optionally, referring to embodiment one, pwm signal is can be used in driving signal.In a kind of optional embodiment, this reality
Apply example two also provide a kind of acceleration current according to new-energy automobile, current body sway angle and expected acceleration from
The dynamic method for adjusting pwm signal, method includes the following steps:
Step S231, judges whether the current acceleration of new-energy automobile is less than expected acceleration, if so, entering step
S232, if it is not, then entering step S236；
Step S232 judges the driving status of new-energy automobile according to current body sway angle, if it is determined that new energy
Automobile is in descent run state, then enters step S233；If it is determined that new-energy automobile is in flat pavement running state, then enter step
Rapid S234；If it is determined that new-energy automobile is in up-hill journey state, then S235 is entered step；
The duty ratio of pwm signal is increased by the first regulated value by step S233；
The duty ratio of pwm signal is increased by the second regulated value by step S234；
The duty ratio of pwm signal is increased third regulated value by step S235；
Step S236 keeps current pwm signal constant.
Specifically, in this embodiment, the amplitude of accommodation value of pwm signal duty ratio being arranged, adjusts PWM signal every time
Duty ratio when, duty ratio can be increasedd or decreased to several amplitude of accommodation values.If the current acceleration of new-energy automobile does not reach
It to expected acceleration, then can be adjusted by increasing the duty ratio of pwm signal, until the real time acceleration of new-energy automobile
More than or equal to expected acceleration.Under the premise of herein, if new-energy automobile is in descent run state, due to being affected by gravity,
It when increasing the duty ratio of pwm signal every time, can adjust by a small margin, i.e. the first regulated value is a smaller value, such as adjusts every time
When the duty ratio of pwm signal is only increased into an amplitude of accommodation value.If new-energy automobile is in up-hill journey state, due to by weight
Power influences, if increasing the duty ratio of pwm signal by a small margin, accelerates regulating effect unobvious, therefore can suitably increase pwm signal and account for
The amplitude of accommodation of empty ratio sets a larger value for third regulated value, such as duty ratio is increased by three when each adjusting
Amplitude of accommodation value.If new-energy automobile is in flat pavement running state, the amplitude of accommodation of pwm signal duty ratio can be set between two parties
It sets, i.e. the second regulated value is between the first regulated value and third regulated value, such as by the duty ratio of pwm signal when adjusting every time
Increase by two regulated values.By the setting of the above differentiated, automatically adjusting the acceleration of new-energy automobile more can be with vehicle body state
It matches.
According to the energy saving accelerated method of the new-energy automobile of aforementioned present invention, the present invention also provides a kind of new-energy automobiles
The energy saving accelerator of new-energy automobile in the energy saving accelerator embodiment includes trigger device, for detecting new energy vapour
The wheel speed sensors of the vehicle wheel rotational speed of vehicle, the acceleration transducer of acceleration for detecting the new-energy automobile and control
Device.Trigger device, wheel speed sensors, acceleration transducer are connect with control device respectively.Control device and new-energy automobile
Motor driver connection.After trigger device receives assisted instruction, control device determines phase according to current vehicle wheel rotational speed
Corresponding expected acceleration, and driving signal is adjusted according to the current acceleration of new-energy automobile and expected acceleration, and will adjust
Driving signal after section is exported to the motor driver of new-energy automobile.
In a kind of optional embodiment, the accelerator pedal of new-energy automobile is can be used in trigger device.Control device peace
Between accelerator pedal and motor driver, when accelerator pedal each in this way is operated, control device can enter work
State.Acceleration transducer is mountable in vehicle body middle position.Optionally, single-chip microcontroller can be used in control device, such as
ATMEGA2560 single-chip microcontroller.
Wheel speed sensors are mountable near the wheel position of new-energy automobile, and optionally, wheel speed sensors can be used suddenly
That sensor, such as 44E Hall sensor.
After the assisted instruction that trigger device obtains driver, wheel speed sensors detection vehicle wheel rotational speed simultaneously outputs signal to control
Device processed, the acceleration of acceleration transducer detection new-energy automobile simultaneously output signal to control device, and control device obtains new
Energy automobile current vehicle wheel rotational speed and acceleration, and driving signal of the automatic adjustment output to motor driver accordingly, control
The work of motor processed, so that new-energy automobile be made to realize stable accelerating ability under the smallest operating current.As for specific
Adjusting method has been described in methodology above embodiment, is no longer repeated herein.
Preferably, six-axle acceleration sensor, such as MPU6050 six-axle acceleration sensing can be used in acceleration transducer
Device.Six-axle acceleration sensor is made of three-axis gyroscope and 3-axis acceleration sensor, can not only measure new-energy automobile
Real time acceleration, body sway state can also be measured.
After accelerator pedal work, 44E Hall sensor detects the vehicle wheel rotational speed of new-energy automobile, and outputs signal to
ATMEGA2560 single-chip microcontroller, while the acceleration and body sway of MPU6050 six-axle acceleration sensor detection new-energy automobile
Accelerate, and output signal (including six axial coordinate states and real time acceleration) is to ATMEGA2560 single-chip microcontroller.ATMEGA2560 is mono-
Piece machine receives the expection acceleration that the signal from above-mentioned two sensor obtains needs by sequential operation, then passes through
The pwm signal of crystal oscillator unit output phase pair on ATMEGA2560 single-chip microcontroller is to motor driver.
In addition, an energy-saving mode selection dress can also be arranged in the energy saving accelerator of the new-energy automobile of this implementation
It sets, provides diversified speeding scheme selection for driver.Driver can be opened or closed by this energy-saving mode selection device
Energy-saving mode can work as driver automatically into energy saving acceleration mode by trigger device after driver's starting energy-saving mode
After closing energy-saving mode, no matter whether driver operates trigger device, all cannot be introduced into energy saving acceleration mode, only passes through biography at this time
The method of system carries out acceleration control.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention
Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of new-energy automobile accelerates energy-saving control method, it is characterised in that: the following steps are included:
After receiving assisted instruction, new-energy automobile current vehicle wheel rotational speed and acceleration are obtained, while it is exhausted to obtain vehicle
Edge resistance, the SOC of power battery and accelerator pedal aperture are to control the air-conditioning of new-energy automobile；
Corresponding expected acceleration is determined according to the current vehicle wheel rotational speed of the new-energy automobile；
Driving signal is adjusted according to the current acceleration of the new-energy automobile and the expected acceleration, and by the drive after adjusting
Dynamic signal is exported to the motor driver of the new-energy automobile.
2. a kind of new-energy automobile according to claim 1 accelerates energy-saving control method, it is characterised in that: the driving letter
Number it is pwm signal, the process packet of pwm signal is adjusted according to the current acceleration of the new-energy automobile and the expected acceleration
Include following steps:
If the current acceleration of the new-energy automobile is less than the expected acceleration, increase the duty ratio of the pwm signal；
If the current acceleration of the new-energy automobile is greater than or equal to the expected acceleration, the duty of the pwm signal is kept
Than constant.
3. a kind of new-energy automobile according to claim 1 accelerates energy-saving control method, it is characterised in that: add receiving
After speed instruction, the current body sway angle of the new-energy automobile is also obtained, and add according to the new-energy automobile is current
Speed, current body sway angle and the expected acceleration adjust the driving signal；
The driving signal is PWM signal；According to the current acceleration of the new-energy automobile, current body sway angle
And the expected acceleration adjust the driving signal process the following steps are included:
If the current acceleration of the new-energy automobile is less than the expected acceleration, and according to current body sway angle
Determine that the new-energy automobile is in descent run state, then the duty ratio of pwm signal is increased by the first regulated value；
If the current acceleration of the new-energy automobile is less than the expected acceleration, and according to current body sway angle
Determine that the new-energy automobile is in flat pavement running state, then the duty ratio of pwm signal is increased by the second regulated value；
If the current acceleration of the new-energy automobile is less than the expected acceleration, and according to current body sway angle
Determine that the new-energy automobile is in up-hill journey state, then the duty ratio of pwm signal is increased into third regulated value.
4. a kind of new-energy automobile according to claim 1 accelerates energy-saving control method, it is characterised in that: control new energy
The air-conditioning of automobile includes the following steps:
When receiving operation of air conditioner request, according to the vehicle insulation resistance, the SOC of the power battery and the acceleration
Pedal opening adjusts the operating status of the air-conditioning, wherein and described when the SOC of the power battery is greater than first threshold
Vehicle insulation resistance is greater than second threshold, and when the accelerator pedal aperture is less than or equal to default aperture, controls the air-conditioning
It is run with normal operation mode；
When the SOC of the power battery is greater than third threshold value and is less than or equal to the first threshold and the vehicle insulated electro
Resistance is greater than that the 4th threshold value or the accelerator pedal aperture are greater than the default aperture and the vehicle insulation resistance is greater than described the
When four threshold values, the air-conditioning is controlled to limit power mode of operation operation；
When the SOC of the power battery is less than or equal to the third threshold value or the vehicle insulation resistance less than or equal to institute
When stating four threshold values, forbid the operation of air conditioner.
5. a kind of new-energy automobile according to claim 4 accelerates energy-saving control method, it is characterised in that: control the sky
It adjusts and further comprises with normal operation mode operation:
Obtain current environmental temperature and current vehicle interior temperature；In the air conditioner refrigerating, if the current environmental temperature is less than
Or it is equal to the first temperature threshold, the air-conditioning is controlled with third Power operation, or in the air-conditioning heating, if described work as
Preceding environment temperature is greater than or equal to second temperature threshold value, controls the air-conditioning with third Power operation；
In the air conditioner refrigerating, if the current environmental temperature is greater than first temperature threshold, further compare institute
The difference of current vehicle interior temperature and preset temperature is stated, or in the air-conditioning heating, if the current environmental temperature is less than
The second temperature threshold value, the then further difference of the current vehicle interior temperature and preset temperature；
If the absolute value of the difference is greater than the first preset difference value, the air-conditioning is controlled with the first Power operation；If institute
The absolute value for stating difference is greater than the second preset difference value and is less than first preset difference value, then controls the air-conditioning with the second power
Operation；
If the absolute value of the difference is less than second preset difference value, the air-conditioning is controlled with third Power operation,
In, first power is greater than second power, and second power is greater than the third power.
6. a kind of new-energy automobile according to claim 5 accelerates energy-saving control method, it is characterised in that: the limit power
The operation power of operational mode is equal to the third power.
7. a kind of new-energy automobile according to claim 5 accelerates energy-saving control method, it is characterised in that: first temperature
26~30 DEG C of threshold value of degree, the second temperature threshold value are 8~12 DEG C, and first preset difference value is 3~6 DEG C, and described second is pre-
If difference is 1~3 DEG C.
8. a kind of new-energy automobile accelerates energy-saving control device, it is characterised in that: including trigger device, for detecting new energy vapour
The wheel speed sensors of the vehicle wheel rotational speed of vehicle, the acceleration transducer of acceleration for detecting the new-energy automobile and control
Device；The trigger device, the wheel speed sensors, the acceleration transducer are connect with the control device respectively；It is described
Control device is connect with the motor driver of the new-energy automobile；It is described after the trigger device receives assisted instruction
Control device determines corresponding expected acceleration according to current vehicle wheel rotational speed, and adds according to the new-energy automobile is current
Speed and the expected acceleration adjust driving signal, and the driving signal after adjusting is exported to the electricity of the new-energy automobile
Machine driver.
9. a kind of new-energy automobile according to claim 8 accelerates energy-saving control device, it is characterised in that: the wheel speed passes
Sensor is Hall sensor.
10. a kind of new-energy automobile according to claim 8 accelerates energy-saving control device, it is characterised in that: the acceleration
Spending sensor is for detecting the acceleration of the new-energy automobile and the six-axle acceleration sensor of body sway angle.
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| CN201810841281.1A CN109177741A (en) | 2018-07-27 | 2018-07-27 | A kind of new-energy automobile acceleration energy-saving control method |
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| CN201810841281.1A CN109177741A (en) | 2018-07-27 | 2018-07-27 | A kind of new-energy automobile acceleration energy-saving control method |
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