CN110626335A - Hybrid power vehicle driving mode control method and system - Google Patents
Hybrid power vehicle driving mode control method and system Download PDFInfo
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- CN110626335A CN110626335A CN201810658528.6A CN201810658528A CN110626335A CN 110626335 A CN110626335 A CN 110626335A CN 201810658528 A CN201810658528 A CN 201810658528A CN 110626335 A CN110626335 A CN 110626335A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0604—Throttle position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
Abstract
The invention provides a method and a system for controlling a driving mode of a hybrid vehicle, wherein the method comprises the steps of acquiring clock information, an accelerator depth corresponding to the clock information and a vehicle speed corresponding to the clock information; calculating the accelerator depth variation and the accelerator change rate of a first preset time period according to the clock information and the accelerator depth corresponding to the clock information; judging a demand driving mode of the vehicle according to the accelerator depth variation, the accelerator change rate and the clock information of the first preset time period and the accelerator depth corresponding to the clock information; adjusting the vehicle driving mode according to the judged required driving mode of the vehicle; and adjusting the wheel end torque of the engine and the wheel end torque of the motor according to the vehicle speed corresponding to the current clock information in the vehicle driving mode. The invention judges the driving mode of the vehicle by detecting the accelerator depth, the accelerator variation and the accelerator variation rate within the set time, and adjusts the engine and the motor according to the driving mode, thereby realizing the automatic adjustment of the vehicle and helping a driver to be familiar with the vehicle.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a method and a system for controlling a driving mode of a hybrid vehicle.
Background
The existing vehicle driving needs to adapt repeatedly to drivers because the self power of the vehicle is different, for example, under the same accelerator depth, some vehicles surging forwards suddenly even because the power is enough, and some vehicles stepping deeply to a certain extent or feeling power is insufficient because the power is weak; generally speaking, the vehicle can not realize self-regulation, and helps a driver to get familiar with the vehicle more quickly, and the power experience is poor when driving, or another extreme appears, which wastes energy.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method and a system for controlling a driving mode of a hybrid vehicle, which solve the problem that the vehicle cannot be adjusted to adapt to a driver.
The invention provides a hybrid vehicle driving mode control method, which comprises the following steps:
acquiring clock information, an accelerator depth corresponding to the clock information and a vehicle speed corresponding to the clock information;
calculating the accelerator depth variation and the accelerator change rate of a first preset time period according to the clock information and the accelerator depth corresponding to the clock information;
judging a demand driving mode of the vehicle according to the accelerator depth variation, the accelerator change rate and the clock information of the first preset time period and the accelerator depth corresponding to the clock information;
adjusting the vehicle driving mode according to the required driving mode of the vehicle obtained by judgment;
and adjusting the wheel end torque of the engine and the wheel end torque of the motor according to the vehicle speed corresponding to the current clock information in the vehicle driving mode.
Further, the specific steps of calculating the accelerator depth variation and the accelerator change rate in the first preset time period according to the clock information and the accelerator depth corresponding to the clock information are as follows:
subtracting the accelerator depth at the beginning of the first preset time period from the accelerator depth at the end of the first preset time period to obtain the accelerator depth variation of the first preset time period;
and dividing the accelerator depth variation of the first preset time period by the first preset time period to obtain the accelerator change rate.
Further, the determining the demand driving mode of the vehicle according to the accelerator depth variation amount, the accelerator change rate, the clock information of the first preset time period and the accelerator depth corresponding to the clock information specifically includes:
when the accelerator change rate is greater than a preset accelerator change rate threshold value and the accelerator depth change amount is greater than a preset accelerator change amount threshold value in a first preset time period, if the time for maintaining the accelerator depth to be greater than the first preset accelerator depth threshold value is greater than a second preset time period, the ending time of the second preset time period is the same as the ending time of the first preset time period, and the accelerator depth is still greater than the first preset accelerator depth threshold value at the end of the first preset time period, the required driving mode of the vehicle is judged to be the motion mode.
Further, the control method further includes:
when the accelerator change rate is greater than a preset accelerator change rate threshold value and the accelerator depth change amount is greater than a preset accelerator change amount threshold value in a first preset time period, if the accelerator depth at the end of the first preset time period is less than or equal to the first preset accelerator depth threshold value, or the accelerator depth at the end of the first preset time period is greater than the first preset accelerator depth threshold value, but the time that the accelerator depth is greater than the first preset accelerator depth threshold value is less than a second preset time period;
judging whether the accelerator depth at the end of a first preset time period is greater than a second preset accelerator depth threshold value or not, and judging whether the time for maintaining the accelerator depth greater than the first preset accelerator depth threshold value is greater than the second preset time period or not, wherein the end time of the second time period is the same as the end time of the first time period;
when the throttle depth at the end of the first preset time period is greater than the second preset throttle depth threshold value, and the time for maintaining the throttle depth to be greater than the second preset throttle depth threshold value is greater than the second preset time period, the end time of the first preset time period is the same as the end time of the second preset time period, and the required driving mode of the vehicle is judged to be the normal mode.
Further, the control method further includes:
and in a first preset time period, when any one of the accelerator change rate is less than or equal to a preset accelerator change rate threshold value, the accelerator depth change amount is less than or equal to a preset accelerator change amount threshold value, the accelerator depth at the end of the first preset time period is less than or equal to a second preset accelerator depth threshold value, or the time for maintaining the accelerator depth to be greater than the second preset accelerator depth threshold value is less than a second preset time period is met, judging that the required driving mode of the vehicle is an energy-saving mode.
Further, the control method further includes:
judging the required driving mode of the vehicle again according to the accelerator depth at the end of a third preset time period and the vehicle speed corresponding to the current clock information, wherein the start of the third preset time period is after the end of the first preset time period;
readjusting the vehicle driving mode according to the newly judged required driving mode of the vehicle;
readjusting an engine wheel end torque and a motor wheel end torque according to the readjusted vehicle driving mode and the vehicle speed corresponding to the current clock.
Further, the step of re-judging the required driving mode of the vehicle according to the accelerator depth at the end of the third preset time period and the vehicle speed corresponding to the current clock information specifically comprises:
when the accelerator depth at the end of the third preset time period is greater than the third accelerator depth threshold value and the vehicle speed at the end of the third preset time period is greater than the first vehicle speed threshold value, the required driving mode of the vehicle is judged to be the motion mode again;
when the accelerator depth at the end of the third preset time period is less than or equal to the fourth accelerator depth threshold value and the vehicle speed at the end of the third preset time period is less than the second vehicle speed threshold value, the required driving mode of the vehicle is judged to be the energy-saving mode again;
and when the accelerator depth at the end of the third preset time period is less than or equal to the third accelerator depth threshold value and greater than the fourth accelerator depth threshold value, or the vehicle speed at the end of the third preset time period is less than or equal to the first vehicle speed threshold value and greater than or equal to the second vehicle speed threshold value, re-judging that the required driving mode of the vehicle is the normal mode.
Further, the control method further includes:
and sending a signal for displaying the current driving mode of the vehicle to the instrument panel, wherein the signal comprises the current driving mode of the vehicle.
The present invention provides a hybrid vehicle drive system control system, including:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring clock information, an accelerator depth corresponding to the clock information and a vehicle speed corresponding to the clock information;
the computing unit is used for computing the accelerator depth variation and the accelerator change rate in a first preset time period according to the clock information and the accelerator depth corresponding to the clock information;
the judging unit is used for judging a demand driving mode of the vehicle according to the accelerator depth variation, the accelerator change rate and the clock information of the first preset time period and the accelerator depth corresponding to the clock information;
the driving mode control unit is used for adjusting the driving mode of the vehicle according to the required driving mode of the vehicle obtained by judgment;
and the driving mode management unit is used for adjusting the wheel end torque of the engine and the wheel end torque of the motor according to the driving mode of the vehicle and the vehicle speed corresponding to the current clock information.
Further, the computing unit is specifically configured to:
subtracting the accelerator depth at the beginning of the first preset time period from the accelerator depth at the end of the first preset time period to obtain the accelerator depth variation of the first preset time period;
and dividing the accelerator depth variation of the first preset time period by the first preset time to obtain the accelerator change rate.
The implementation of the invention has the following beneficial effects:
according to the method, the most appropriate driving mode of the vehicle is judged by obtaining the accelerator depth, the accelerator depth change rate and the change amount in the preset time, the driving mode is adjusted, and the wheel end torque of an engine and the wheel end torque of a motor are adjusted by combining the current vehicle speed; and in the running process of the vehicle, whether the driving mode of the vehicle needs to be readjusted or not is determined by taking a certain preset time as a period, and the method realizes the self-adaptive adjustment of the vehicle according to the self use condition, helps a driver to get familiar with the vehicle quickly, and avoids the problem of insufficient power or power waste of the vehicle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a hybrid vehicle drive method control method according to an embodiment of the present invention.
FIG. 2 is a graph of vehicle drive mode, vehicle speed, engine wheel end torque and motor torque provided by an embodiment of the present invention.
FIG. 3 is a flowchart of a method for re-determining a requested drive mode for a vehicle and re-adjusting engine wheel end torque and motor wheel end torque provided by an embodiment of the present invention.
Fig. 4 is a flowchart illustrating an operation of a hybrid vehicle drive system according to an embodiment of the present invention.
Fig. 5 is an operational schematic diagram of a hybrid vehicle drive system according to an embodiment of the present invention.
Fig. 6 is a block diagram of a hybrid vehicle drive system according to an embodiment of the present invention.
Detailed Description
The core content of the patent is to adjust the driving mode of the vehicle according to the self condition of the vehicle, and further adjust the wheel end torque of the engine and the wheel end torque of the motor of the vehicle, and the specific implementation mode of the system is further described with reference to the attached drawings and the embodiment.
Embodiments of a hybrid vehicle drive mode control method and system provided by the present invention will be described in detail below.
As shown in fig. 1, a hybrid vehicle driving method according to an embodiment of the present invention includes:
s101, clock information, an accelerator depth corresponding to the clock information and a vehicle speed corresponding to the clock information are obtained.
In this embodiment, a Hybrid Control Unit (HCU) of the Hybrid vehicle receives an accelerator signal, a vehicle speed signal, and a clock signal, and obtains clock information, an accelerator depth corresponding to the clock information, and a vehicle speed corresponding to the clock information.
And S102, calculating the accelerator depth variation and the accelerator change rate of a first preset time period according to the clock information and the accelerator depth corresponding to the clock information.
In this embodiment, it is assumed that the first preset time period is T1, the accelerator depth at the beginning of the first preset time period is S1, the accelerator depth at the end of the first preset time period is S2, and the accelerator depth variation Δ S = S2-S1 at the first preset time, that is, the accelerator depth variation at the beginning of the first preset time period is obtained by subtracting the accelerator depth at the end of the first preset time period from the accelerator depth at the end of the first preset time period; the throttle depth change rate of the first preset time period R1= Δ S/T1, namely, the throttle change rate is obtained by dividing the throttle depth change amount of the first preset time period by the first preset time period.
And S103, judging a demand driving mode of the vehicle according to the accelerator depth variation, the accelerator change rate, the clock information and the accelerator depth corresponding to the clock information in the first preset time period.
In this embodiment, in a first preset time period, the accelerator change rate and the accelerator depth change amount are determined first, and when the accelerator change rate is greater than a preset accelerator change rate threshold and the accelerator depth change amount is greater than a preset accelerator change amount threshold, a driving mode is determined further according to the accelerator depth at the end of the first preset time period and the time when the accelerator depth is maintained to be greater than the first accelerator depth threshold, where the preset accelerator change amount threshold is generally 30%;
further, the driving mode is judged according to the accelerator depth at the end of the first preset time period and the time for maintaining the accelerator depth above the first accelerator depth threshold, specifically, whether the accelerator depth at the end of the first preset time period is greater than the first preset accelerator depth threshold is judged, whether the time for maintaining the accelerator depth greater than the first accelerator depth threshold is greater than a second preset time period is judged, and the end time of the second preset time period is the same as the end time of the first preset time period.
And when the accelerator depth at the end of the first preset time period is greater than a first preset accelerator depth threshold value, and the time for maintaining the accelerator depth to be greater than the first preset accelerator depth threshold value is greater than a second preset time period, judging that the required driving mode of the vehicle is a motion mode.
The sport mode is also called an off-road mode, and only when the accelerator is continuously deep and is still deep until the first preset time is over, the demanded driving mode of the vehicle can be judged to be the sport mode, and at the moment, the engine wheel end torque and the motor can be automatically adjusted to be larger to adapt to the off-road or sport demand of the vehicle.
In a first preset time period, when the accelerator change rate is greater than a preset accelerator change rate threshold, and the accelerator depth change amount is greater than a preset accelerator change amount threshold, if the accelerator depth at the end of the first preset time period is less than or equal to a first preset accelerator depth threshold, or the accelerator depth at the end of the first preset time period is greater than a first preset accelerator depth threshold, but the time that the accelerator depth is greater than the first preset accelerator depth threshold is less than a second preset time period, the first accelerator depth threshold is 80% in this embodiment.
On the premise, whether the accelerator depth at the end of the first preset time period is greater than a second preset accelerator depth threshold value or not is judged, whether the time that the accelerator depth is maintained to be greater than the first preset accelerator depth threshold value is greater than the second preset time period or not is judged, the end time of the first preset time period is the same as the end time of the second preset time period, and the second preset accelerator depth threshold value is 40% in the embodiment;
when the throttle depth at the end of the first preset time is greater than the second preset throttle depth threshold value, and the time for maintaining the throttle depth to be greater than the second preset throttle depth threshold value is greater than the second preset time period, the end time of the first preset time period is the same as the end time of the second preset time period, and the required driving mode of the vehicle is judged to be the normal mode.
And in a first preset time, when any one of the accelerator change rate is less than or equal to a preset accelerator change rate threshold value, the accelerator depth change amount is less than or equal to a preset accelerator change amount threshold value, the accelerator depth at the end of a first preset time period is less than or equal to a second preset accelerator depth threshold value or the time when the accelerator depth is maintained to be greater than the second preset accelerator threshold value is less than a second preset time period is met, judging that the required driving mode of the vehicle is an energy-saving mode.
And step S104, adjusting the vehicle driving mode according to the judged required driving mode of the vehicle.
In this embodiment, the vehicle has three driving modes including a sport mode, a normal mode and an energy saving mode, and the vehicle driving mode is adjusted to the demanded driving mode of the vehicle by determining the demanded driving mode of the vehicle, for example, the vehicle driving mode is adjusted to the sport mode by determining the demanded driving mode of the vehicle to be the sport mode, that is, the vehicle needs a large amount of power to drive at this time, and the vehicle driving mode is adjusted to the sport mode, and further the engine wheel end torque and the motor wheel end torque are adjusted to meet the demand of the sport mode.
After the vehicle adjusts the driving mode, the control system sends a signal to the dashboard indicating the current driving mode of the vehicle, which includes the current driving mode of the vehicle.
And S105, adjusting the wheel end torque of the engine and the wheel end torque of the motor according to the vehicle driving mode and the vehicle speed corresponding to the current clock information.
In other embodiments of the present invention, the engine wheel end torque and the motor wheel end torque are adjusted according to the vehicle speed corresponding to the current clock information in the vehicle driving mode, which is specifically illustrated by the figures.
In this embodiment, the vehicle speed corresponding to the current clock information refers to the vehicle speed when the engine wheel end torque and the motor wheel end torque are calculated, and the vehicle speed corresponding to the current clock information is acquired in step S101.
As shown in fig. 2, the embodiment of the invention provides the vehicle driving mode, including the sport mode, the normal mode and the energy saving mode, the vehicle speed, the engine wheel end torque and the motor wheel end torque relationship.
Fig. 2 of the present embodiment provides curves for the sport mode wheel end torque, the normal mode wheel end torque, the energy saving mode wheel end torque, and the motor wheel end torque, respectively.
The total torque of the wheel end in the motion mode refers to the torque of the wheel end of the vehicle in the motion mode, and the difference value between the total torque of the wheel end in the motion mode and the torque of the wheel end of the motor in the figure 2 is the torque of the wheel end of the engine in the motion mode, so that the torque value of the wheel end of the vehicle in the motion mode and the torque value of the wheel end of the motor can be checked from a curve when the driving mode of the vehicle and the current vehicle speed are known, the torque value of the wheel end of the engine can be continuously calculated, and the torque of the wheel end of the engine and the torque value of the wheel end of the motor are.
The normal mode wheel end torque is the torque of the wheel end of the vehicle in the normal mode, the difference value between the normal mode wheel end torque and the motor wheel end torque in fig. 2 is the engine wheel end torque in the normal mode, similarly, according to the mode of the vehicle and the current vehicle speed, the wheel end torque value and the motor wheel end torque value of the wheel end of the vehicle in the mode can be obtained by searching from the curve, the engine wheel end torque value can be obtained by subtracting the motor wheel end torque value from the wheel end torque value, and the engine wheel end torque and the motor wheel end torque are adjusted according to the engine wheel end torque value and the motor wheel end torque value.
The energy-saving mode wheel end torque refers to the torque of the wheel end of the vehicle in the energy-saving mode, and similarly, the engine wheel end torque value is obtained according to the torque value of the wheel end of the vehicle in the energy-saving mode in fig. 2 and the motor wheel end torque value, and the engine wheel end torque and the motor wheel end torque are adjusted according to the engine wheel end torque value and the motor wheel end torque value.
As shown in fig. 3, an embodiment of the present invention provides a method of re-determining a demanded drive mode of a vehicle and re-adjusting engine wheel-end torque and motor wheel-end torque, the method comprising:
with the embodiment shown in fig. 1, the vehicle adjusts the vehicle drive mode according to the change of the accelerator, and adjusts the engine wheel end torque and the motor wheel end torque according to the drive mode and the vehicle speed corresponding to the current clock information; in the running process of the vehicle, because of road section change and demand change, the accelerator depth and the vehicle speed of the vehicle still need to be monitored, and the demand driving mode of the vehicle is judged according to the acquired accelerator depth and the vehicle speed data of the vehicle so as to adjust the driving mode of the vehicle and further readjust the wheel end torque of the engine and the wheel end torque of the motor.
And S301, re-judging the required driving mode of the vehicle according to the accelerator depth and the vehicle speed at the end of the third preset time period.
It should be noted that, the third preset time period starts after the first preset time period ends, the driving mode of the vehicle is determined in the first preset time period, but both the traveling road condition and the driving demand of the vehicle may change, and the vehicle may set a periodic third preset time for detecting the running condition of the vehicle and continuously correcting the driving mode of the vehicle.
The implementation mode of the step specifically comprises the following steps:
when the accelerator depth at the end of the third preset time period is greater than the third accelerator depth threshold value and the vehicle speed at the end of the third preset time period is greater than the first vehicle speed threshold value, the required driving mode of the vehicle is judged to be the motion mode again;
when the accelerator depth at the end of the third preset time period is less than or equal to the fourth accelerator depth threshold value and the vehicle speed at the end of the third preset time period is less than the second vehicle speed threshold value, the required driving mode of the vehicle is judged to be the energy-saving mode again;
and when the accelerator depth at the end of the third preset time period is less than or equal to the third accelerator depth threshold value and greater than the fourth accelerator depth threshold value, or the vehicle speed at the end of the third preset time period is less than or equal to the first vehicle speed threshold value and greater than or equal to the second vehicle speed threshold value, re-judging that the required driving mode of the vehicle is the normal mode.
And step S302, readjusting the driving mode of the vehicle according to the newly judged required driving mode of the vehicle.
And step S303, readjusting the engine wheel end torque and the motor wheel end torque according to the readjusted vehicle driving mode and the vehicle speed corresponding to the current clock information.
It should be noted that, the methods of S104 and S105 are adopted in step S302 and step S303; the current vehicle speed is the vehicle speed at which the vehicle drive mode is readjusted, and the engine wheel end torque value and the motor wheel end torque value are calculated.
It is an object of embodiments of the present invention to periodically select an appropriate drive mode for a vehicle and provide engine wheel end torque and motor wheel end torque in accordance with the drive mode.
As shown in fig. 4, an embodiment of the present invention provides a hybrid vehicle driving manner control system, in which an HCU of the system acquires an accelerator depth and a vehicle speed corresponding to clock information, calculates an accelerator change rate and an accelerator depth change amount, determines a required driving mode of a vehicle according to a control condition, and adjusts the vehicle to a corresponding driving mode according to the required driving mode of the vehicle.
Control condition 1: the accelerator change rate, the accelerator depth change amount, the accelerator depth and the maintaining time;
control condition 2: the accelerator change rate, the accelerator depth change amount, the accelerator depth and the maintaining time;
control condition 3: throttle depth and hold time, vehicle speed;
control condition 4: throttle depth and hold time, vehicle speed.
The control condition 1 and the control condition 2 are preconditions for triggering the sport mode and the normal mode, and in the time of T1, when the change rate of the accelerator depth is greater than S1 and the change amount of the accelerator depth is greater than 30%, the driving requirement of a user at the moment needs large power (the sport mode or the normal mode) only by means of quick change and large change of the accelerator, otherwise, the user wants a relatively economic energy-saving mode.
As shown in FIG. 5, an embodiment of the present invention provides a hybrid vehicle drive mode control system, which includes a throttle module, a vehicle speed module, a timing module, a drive mode self-learning module, a drive control module, a display, an engine controller, and a motor controller; the driving mode self-learning module determines a driving mode through operation, the driving mode is sent to the driving control module to be displayed and sent to the driving control module so as to replace or maintain the driving mode, and required engine torque and required motor torque are given according to the driving mode, wherein the engine torque is engine wheel end torque on the graph, the motor torque is motor wheel end torque, the engine controller adjusts the engine controller according to the required engine wheel end torque value, and the motor controller adjusts the motor controller according to the required motor wheel end torque.
As shown in fig. 6, an embodiment of the present invention provides a hybrid vehicle drive manner control system including:
an obtaining unit 61 configured to obtain clock information, an accelerator depth corresponding to the clock information, and a vehicle speed corresponding to the clock information;
the calculating unit 62 is configured to calculate a first preset time accelerator depth variation and an accelerator change rate according to the clock information and the accelerator depth corresponding to the clock information;
the judging unit 63 is configured to judge a required driving mode of the vehicle according to the accelerator depth variation amount, the accelerator change rate, the clock information and the accelerator depth corresponding to the clock information at the first preset time;
a driving mode control unit 64, configured to adjust a vehicle driving mode according to the determined required driving mode of the vehicle;
and a driving mode management unit 65, configured to adjust the engine wheel end torque and the motor wheel end torque according to the vehicle driving mode and the current vehicle speed.
Further, the calculating unit 62 is specifically configured to:
subtracting the accelerator depth at the beginning of the first preset time period from the accelerator depth at the end of the first preset time period to obtain the accelerator depth variation of the first preset time period;
and dividing the accelerator depth variation of the first preset time period by the first preset time to obtain the accelerator change rate.
The implementation of the invention has the following beneficial effects:
according to the method, the most appropriate driving mode of the vehicle is judged by acquiring the accelerator depth, the accelerator depth change rate and the accelerator depth change amount in a preset time period, the driving mode is adjusted, and the wheel end torque of an engine and the wheel end torque of a motor are adjusted by combining the current vehicle speed; and in the running process of the vehicle, whether the driving mode of the vehicle needs to be readjusted or not is determined by taking a certain preset time as a period, and the method realizes the self-adaptive adjustment of the vehicle according to the self use condition, helps a driver to get familiar with the vehicle quickly, and avoids the problem of insufficient power or power waste of the vehicle.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A hybrid vehicle drive manner control method characterized by comprising:
acquiring clock information, an accelerator depth corresponding to the clock information and a vehicle speed corresponding to the clock information;
calculating the accelerator depth variation and the accelerator change rate of a first preset time period according to the clock information and the accelerator depth corresponding to the clock information;
judging a demand driving mode of the vehicle according to the accelerator depth variation, the accelerator change rate and the clock information of the first preset time period and the accelerator depth corresponding to the clock information;
adjusting the vehicle driving mode according to the required driving mode of the vehicle obtained by judgment;
and adjusting the wheel end torque of the engine and the wheel end torque of the motor according to the vehicle speed corresponding to the current clock information in the vehicle driving mode.
2. The control method according to claim 1, wherein the specific steps of calculating the accelerator depth variation and the accelerator change rate in the first preset time period according to the clock information and the accelerator depth corresponding to the clock information are as follows:
subtracting the accelerator depth at the beginning of the first preset time period from the accelerator depth at the end of the first preset time period to obtain the accelerator depth variation of the first preset time period;
and dividing the accelerator depth variation of the first preset time period by the first preset time period to obtain the accelerator change rate.
3. The control method according to claim 1, wherein the determining the demanded drive mode of the vehicle based on the accelerator depth variation amount, the accelerator change rate, the clock information and the accelerator depth corresponding to the clock information for the first preset time period specifically comprises:
when the accelerator change rate is greater than a preset accelerator change rate threshold value and the accelerator depth change amount is greater than a preset accelerator change amount threshold value in a first preset time period, if the time for maintaining the accelerator depth to be greater than the first preset accelerator depth threshold value is greater than a second preset time period, the ending time of the second preset time period is the same as the ending time of the first preset time period, and the accelerator depth is still greater than the first preset accelerator depth threshold value at the end of the first preset time period, the required driving mode of the vehicle is judged to be the motion mode.
4. The control method according to claim 1, characterized by further comprising:
when the accelerator change rate is greater than a preset accelerator change rate threshold value and the accelerator depth change amount is greater than a preset accelerator change amount threshold value in a first preset time period, if the accelerator depth at the end of the first preset time period is less than or equal to the first preset accelerator depth threshold value, or the accelerator depth at the end of the first preset time period is greater than the first preset accelerator depth threshold value, but the time that the accelerator depth is greater than the first preset accelerator depth threshold value is less than a second preset time period;
judging whether the accelerator depth at the end of a first preset time period is greater than a second preset accelerator depth threshold value or not, and judging whether the time for maintaining the accelerator depth greater than the first preset accelerator depth threshold value is greater than a second preset time period or not, wherein the end time of the second preset time period is the same as the end time of the first preset time period;
when the throttle depth at the end of the first preset time period is greater than the second preset throttle depth threshold value, and the time for maintaining the throttle depth to be greater than the second preset throttle depth threshold value is greater than the second preset time period, the end time of the first preset time period is the same as the end time of the second preset time period, and the required driving mode of the vehicle is judged to be the normal mode.
5. The control method according to claim 1, characterized by further comprising:
and in a first preset time period, when any one of the accelerator change rate is less than or equal to a preset accelerator change rate threshold value, the accelerator depth change amount is less than or equal to a preset accelerator change amount threshold value, the accelerator depth at the end of the first preset time period is less than or equal to a second preset accelerator depth threshold value, or the time for maintaining the accelerator depth to be greater than the second preset accelerator depth threshold value is less than a second preset time period is met, judging that the required driving mode of the vehicle is an energy-saving mode.
6. The method of claim 1, wherein the control method further comprises:
judging the required driving mode of the vehicle again according to the accelerator depth at the end of a third preset time period and the vehicle speed corresponding to the current clock information, wherein the start of the third preset time period is after the end of the first preset time period;
readjusting the vehicle driving mode according to the newly judged required driving mode of the vehicle;
readjusting an engine wheel end torque and a motor wheel end torque according to the readjusted vehicle driving mode and the vehicle speed corresponding to the current clock.
7. The control method according to claim 6, wherein the step of re-judging the required driving mode of the vehicle according to the accelerator depth at the end of the third preset time period and the vehicle speed corresponding to the current clock information specifically comprises:
when the accelerator depth at the end of the third preset time period is greater than the third accelerator depth threshold value and the vehicle speed at the end of the third preset time period is greater than the first vehicle speed threshold value, the required driving mode of the vehicle is judged to be the motion mode again;
when the accelerator depth at the end of the third preset time period is less than or equal to the fourth accelerator depth threshold value and the vehicle speed at the end of the third preset time period is less than the second vehicle speed threshold value, the required driving mode of the vehicle is judged to be the energy-saving mode again;
and when the accelerator depth at the end of the third preset time period is less than or equal to the third accelerator depth threshold value and greater than the fourth accelerator depth threshold value, or the vehicle speed at the end of the third preset time period is less than or equal to the first vehicle speed threshold value and greater than or equal to the second vehicle speed threshold value, re-judging that the required driving mode of the vehicle is the normal mode.
8. The control method according to any one of claims 1 to 7, characterized by further comprising:
and sending a signal for displaying the current driving mode of the vehicle to the instrument panel, wherein the signal comprises the current driving mode of the vehicle.
9. A hybrid vehicle drive mode control system, characterized by comprising:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring clock information, an accelerator depth corresponding to the clock information and a vehicle speed corresponding to the clock information;
the computing unit is used for computing the accelerator depth variation and the accelerator change rate in a first preset time period according to the clock information and the accelerator depth corresponding to the clock information;
the judging unit is used for judging a demand driving mode of the vehicle according to the accelerator depth variation, the accelerator change rate and the clock information of the first preset time period and the accelerator depth corresponding to the clock information;
the driving mode control unit is used for adjusting the driving mode of the vehicle according to the required driving mode of the vehicle obtained by judgment;
and the driving mode management unit is used for adjusting the wheel end torque of the engine and the wheel end torque of the motor according to the driving mode of the vehicle and the vehicle speed corresponding to the current clock information.
10. The control system of claim 9, wherein the computing unit is specifically configured to:
subtracting the accelerator depth at the beginning of the first preset time period from the accelerator depth at the end of the first preset time period to obtain the accelerator depth variation of the first preset time period;
and dividing the accelerator depth variation of the first preset time period by the first preset time to obtain the accelerator change rate.
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| CN110626335B (en) | 2021-03-19 |
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