CN110103985B - Vehicle control method and device - Google Patents
Vehicle control method and device Download PDFInfo
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- CN110103985B CN110103985B CN201910312578.3A CN201910312578A CN110103985B CN 110103985 B CN110103985 B CN 110103985B CN 201910312578 A CN201910312578 A CN 201910312578A CN 110103985 B CN110103985 B CN 110103985B
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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
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/0098—Details of control systems ensuring comfort, safety or stability not otherwise provided for
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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
- B60W2510/0638—Engine speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0676—Engine temperature
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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
- B60W2510/10—Change speed gearings
- B60W2510/107—Temperature
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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
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Human Computer Interaction (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention relates to the technical field of vehicles, in particular to a vehicle control method and device. When the ambient temperature of the vehicle exceeds the preset temperature range, the vehicle is enabled to operate according to a preset control mode so as to protect a hardware system of the vehicle; after the vehicle enters the preset control mode, the vehicle is timely controlled to exit the preset control mode when the exit condition is met by monitoring the state data of the vehicle and the duration of the preset control mode, and the time when the vehicle exits or enters the preset control mode is accurately found out through condition judgment, so that the vehicle always runs in the mode which is most beneficial to a hardware system, the damage of severe environment to the vehicle is reduced, and the vehicle performance is improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle control method and device.
Background
The vehicle is used as an important vehicle for traveling, and has high requirements on performance, service life and the like, and the vehicle is used as a tool exposed to natural environment and needs to face different weather conditions, such as a high-temperature environment and a high-cold environment, and the high-temperature or high-cold environment is easy to damage the vehicle performance.
When the external environment temperature is very low, the temperature of the gearbox oil of the automobile is also very low, for the traditional automatic gearbox, the viscosity of the automatic gearbox oil is increased due to the fact that the temperature of the gearbox oil is low, gear shifting is slowed, the response of the gearbox to the torque transmitted by an engine through a clutch is slowed, the torque cannot be transmitted to a wheel end in time, and the driving feeling of a driver is influenced; meanwhile, the lubricating effect of the gearbox oil is greatly reduced, the friction force between the gears of the gearbox is increased, and the gearbox is damaged.
When the external environment temperature is very high, the hardware of the automobile works at very high temperature, and if the hardware systems work in a high-temperature environment for a long time, the performance can be changed and possibly damaged. For example, the engine is prone to knocking in a high-temperature environment, the engine is severely damaged by knocking, carbon deposition is prone to being caused by high temperature of the engine, abrasion of the engine is increased, the service life of the engine is shortened, viscosity of gearbox oil changes in the high-temperature environment, the gear shifting point is different from the gear shifting point under a normal condition, high-temperature compensation needs to be conducted on the gear shifting point through a control system, and the purpose of smooth gear shifting under the high-temperature condition is achieved through adjustment and compensation.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a vehicle control method and a vehicle control device, which can reduce the damage of special environment to the vehicle performance by adaptively controlling the vehicle under the special environment condition.
One aspect of the present invention provides a control method of a vehicle, including:
when a vehicle runs in a preset control mode, acquiring first state data of the vehicle and running duration of the preset control mode, wherein the preset control mode is used for protecting a hardware system of the vehicle when the ambient temperature of the vehicle exceeds a preset temperature range;
judging whether the first state data meet a set exit condition and whether the running time length is greater than a set time threshold value;
if the first state data meet the exit condition and the running time is longer than the time threshold, controlling the vehicle to exit the preset control mode;
and if the first state data does not meet the exit condition and/or the running time is not greater than the time threshold, controlling the vehicle to keep the preset control mode.
Preferably, when the ambient temperature of the vehicle is lower than the minimum value of the temperature range, the first state data comprises accelerator pedal opening, engine cooling water temperature, transmission oil temperature and engine speed;
the judging whether the first state data meets the set exit condition comprises the following steps: determining that the first state data satisfies the exit condition if the first state data satisfies any one of (1) to (4) below; if not, judging that the first state data does not meet the exit condition;
(1) the opening degree of an accelerator pedal is greater than a set pedal opening degree threshold value;
(2) the temperature of the cooling water of the engine is greater than a set first cooling water temperature threshold value;
(3) the gearbox oil temperature is greater than a set first gearbox oil temperature threshold value;
(4) the engine speed is less than the set engine speed threshold.
Preferably, when the temperature of the environment where the vehicle is located is higher than the maximum value of the temperature range, the first state data comprises instruction information of engine oil temperature, engine water temperature, transmission oil temperature and a preset control mode;
the judging whether the first state data meets the set exit condition comprises the following steps: determining that the first state data satisfies the exit condition if the first state data satisfies any one of (1) to (4) below; if not, judging that the first state data does not meet the exit condition;
(1) the engine oil temperature is not greater than a set first engine oil temperature threshold;
(2) the water temperature of the engine is not more than a set engine water temperature threshold;
(3) the gearbox oil temperature is not greater than a set second gearbox oil temperature threshold value;
(4) the command information of the preset control mode is closed.
Further, when the temperature of the environment where the vehicle is located is higher than the maximum value of the temperature range, after controlling the vehicle to maintain the preset control mode, the method further includes:
acquiring second state data;
judging whether the second state data meets a set switching condition or not;
if the second state data meet the switching condition, controlling the vehicle to be switched from the preset control mode to an enhanced control mode, wherein the enhanced control mode is used for accelerating the heat dissipation of a hardware system by adjusting the operation parameters of the hardware system of the vehicle;
and if the second state data do not meet the switching condition, returning to the step of acquiring the first state data of the vehicle and the running time of the preset control mode.
Preferably, the second state data includes engine oil temperature, engine cooling water temperature and transmission oil temperature;
the judging whether the second state data meets the set switching condition comprises the following steps: if the second state data meets any one of the following (1) to (3), judging that the second state data meets a set switching condition; if not, judging that the second state data does not meet the set switching condition;
(1) the engine oil temperature is greater than a set second engine oil temperature threshold;
(2) the temperature of the engine cooling water is greater than a set second cooling water temperature threshold value;
(3) the gearbox oil temperature is greater than a set second gearbox oil temperature threshold value.
Further, before the vehicle runs in a preset control mode and the first state data of the vehicle and the running duration of the preset control mode are acquired, the method further includes:
acquiring third state data of the vehicle;
judging whether the third state data meets set entry conditions or not;
and if the third state data meet the entry condition, controlling the vehicle to enter the preset control mode.
Preferably, when the ambient temperature of the vehicle is lower than the minimum value of the temperature range, the third state data includes an engine cooling water temperature, an ambient temperature, a transmission oil temperature and an engine speed;
the judging whether the third state data meets the set entry condition comprises the following steps: if the third state data meets any one of the following (1) to (4), judging that the third state data meets a set entry condition; if not, judging that the third state data does not meet the set entry condition;
(1) the temperature of the engine cooling water is smaller than a set third cooling water temperature threshold value;
(2) the ambient temperature is less than a set third cooling water temperature threshold;
(3) the gearbox oil temperature is not greater than the set first gearbox oil temperature threshold value;
(4) the engine speed is not less than the set engine speed threshold.
Preferably, when the temperature of the environment where the vehicle is located is higher than the maximum value of the temperature range, the third state data includes instruction information of engine oil temperature, engine water temperature, transmission oil temperature and a preset control mode;
the judging whether the third state data meets the set entry condition comprises the following steps: determining that the third state data satisfies the entry condition if the third state data satisfies any one of the following (1) to (4); if not, judging that the third state data does not meet the entry condition;
(1) the temperature of engine oil is greater than the set first engine oil temperature threshold;
(2) the water temperature of the engine is greater than the set threshold value of the water temperature of the engine;
(3) the gearbox oil temperature is greater than the set second gearbox oil temperature threshold value;
(4) the command information of the preset control mode is open.
The present invention also provides a control device of a vehicle, including:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring first state data of a vehicle and the operation duration of a preset control mode when the vehicle operates in the preset control mode, and the preset control mode is used for protecting a hardware system of the vehicle when the ambient temperature of the vehicle exceeds a preset temperature range;
the judging unit is used for judging whether the first state data meet a set exit condition and whether the running time length is greater than a set time threshold value;
the first execution unit is used for controlling the vehicle to exit the preset control mode when the first state data meet the exit condition and the running duration is greater than the time threshold;
and the second execution unit is used for controlling the vehicle to keep the preset control mode when the first state data does not meet the exit condition and/or the running duration is not greater than the time threshold.
Further, the second execution unit includes:
the data acquisition module is used for acquiring second state data;
the judging module is used for judging whether the second state data meets the set switching condition;
and the execution module is used for controlling the vehicle to be switched from the preset control mode to an enhanced control mode when the second state data meets the switching condition, and the enhanced control mode is used for accelerating the heat dissipation of a hardware system by adjusting the operation parameters of the hardware system of the vehicle.
Due to the technical scheme, the invention has the following beneficial effects:
when the ambient temperature of the vehicle exceeds a preset temperature range (such as a high-temperature or high-cold environment), the vehicle runs according to a preset control mode so as to protect a hardware system of the vehicle; more importantly, after the vehicle enters the preset control mode, the vehicle is timely controlled to exit the preset control mode when the exit condition is met by monitoring the state data of the vehicle and the duration of the preset control mode, so that the damage to a hardware system of the vehicle caused by the fact that the vehicle is in the preset control mode for a long time under the condition that the vehicle does not need to operate according to the preset control mode is avoided. The method accurately finds out the time when the vehicle exits or enters the preset control mode through condition judgment, so that the vehicle always runs in the most favorable mode for a hardware system, and the effects of reducing the damage of severe environment to the vehicle and improving the vehicle performance are achieved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment 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 invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flowchart of a control method of a vehicle according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for entering a preset control mode in a control method for a vehicle according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of a vehicle according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control device of a vehicle according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The embodiment of the invention provides a vehicle control method and a vehicle control device, aiming at the situation that a vehicle runs under the working conditions of high-cold and high-temperature environments, new logic is added to judge the conditions of entering and exiting the preset control mode, the conditions of entering and exiting the preset control mode can be judged and analyzed more accurately and comprehensively, and the defects that the performance of the vehicle under the two environmental working conditions is influenced because the preset control mode cannot be entered due to insufficient judgment conditions and the performance of the vehicle is influenced when the vehicle is in the preset control mode for a long time are avoided.
Fig. 1 is a flowchart of a control method for a vehicle according to an embodiment of the present invention. Referring to fig. 1, a control method for a vehicle according to an embodiment of the present invention includes:
s101, when a vehicle runs in a preset control mode, acquiring first state data of the vehicle and running duration of the preset control mode, wherein the preset control mode is used for protecting a hardware system of the vehicle when the ambient temperature of the vehicle exceeds a preset temperature range;
s102, judging whether the first state data meet a set exit condition and whether the running time length is greater than a set time threshold value;
s103, if the first state data meet the quitting condition and the running time is greater than the time threshold, controlling the vehicle to quit the preset control mode;
and S104, if the first state data does not meet the exit condition and/or the running duration is not greater than the time threshold, controlling the vehicle to keep the preset control mode.
In the embodiment of the invention, the preset temperature range refers to a temperature range which does not damage the performance of vehicle hardware, and the preset temperature range can be determined according to the normal working temperature of each part in a vehicle hardware system. When the vehicle operates at a temperature outside the preset temperature range, various parts of the vehicle hardware system may be affected by the external temperature to cause unstable performance or function damage, and therefore, when the ambient temperature of the vehicle exceeds the preset temperature range, the vehicle needs to be specially controlled to create a proper operating temperature for the vehicle hardware system, ensure the stability of the performance of the vehicle, and protect the hardware system. In one possible embodiment, when the external environment temperature of the vehicle is higher than the maximum value in the preset temperature range, the corresponding preset control mode may be referred to as hot mode (high temperature mode), and when the external environment temperature of the vehicle is lower than the minimum value in the preset temperature range, the corresponding preset control mode may be referred to as cold mode (high cold mode).
Under the cold mode, a gear shifting point of the vehicle can be shifted up and down according to a cold mode gear shifting point, compared with a basic gear shifting point, the vehicle speed of the cold mode at the gear shifting point and the vehicle speed of the cold mode at the gear shifting point are both increased, the engine runs at a higher rotating speed (relative to the basic gear shifting point) due to the increase of the vehicle speed at the gear shifting point and the vehicle speed at the gear shifting point, and when the engine runs at the higher rotating speed, the temperature of cooling water, the temperature of engine oil and the temperature of gearbox oil can reach the temperature under the normal mode at a higher speed, so that the performance of the vehicle can meet the driving requirement under the.
Under the hot mode, the gear shifting point of the vehicle can be shifted up and down according to the gear shifting point of the hot mode, compared with the basic gear shifting point, the speed of the gear shifting point and the speed of the gear shifting point of the hot mode are greatly increased, the engine can be enabled to run at a high rotating speed as much as possible, the flow rate of a cooling medium is accelerated, further, the heat dissipation of parts such as a gearbox is accelerated, the hardware system of the vehicle is protected, meanwhile, the running time of the vehicle in the high-temperature mode can be shortened, and the performance of the vehicle can meet the driving requirement.
Specifically, when the ambient temperature of the vehicle is lower than the minimum value of the temperature range, the first state data includes an accelerator pedal opening degree, an engine cooling water temperature, a transmission oil temperature and an engine speed. Correspondingly, the judging whether the first state data meets the set exit condition includes: determining that the first state data satisfies the exit condition if the first state data satisfies any one of (1) to (4) below; if not, judging that the first state data does not meet the exit condition;
(1) the opening degree of an accelerator pedal is greater than a set pedal opening degree threshold value;
(2) the temperature of the cooling water of the engine is greater than a set first cooling water temperature threshold value;
(3) the gearbox oil temperature is greater than a set first gearbox oil temperature threshold value;
(4) the engine speed is less than the set engine speed threshold.
The pedal opening degree threshold, the first cooling water temperature threshold, the first transmission oil temperature threshold and the engine speed threshold in the conditions (1) to (4) can be obtained through experiments.
And when the temperature of the environment where the vehicle is located is higher than the maximum value of the temperature range, the first state data comprises the engine oil temperature, the engine water temperature, the gearbox oil temperature and instruction information of a preset control mode. Correspondingly, the judging whether the first state data meets the set exit condition includes: determining that the first state data satisfies the exit condition if the first state data satisfies any one of (1) to (4) below; if not, judging that the first state data does not meet the exit condition;
(1) the engine oil temperature is not greater than a set first engine oil temperature threshold;
(2) the water temperature of the engine is not more than a set engine water temperature threshold;
(3) the gearbox oil temperature is not greater than a set second gearbox oil temperature threshold value;
(4) the command information of the preset control mode is closed.
The first engine oil temperature threshold, the engine water temperature threshold and the second transmission oil temperature threshold in the conditions (1) to (4) can be obtained through experiments.
In a possible implementation manner, before the vehicle runs in the preset control mode and the first state data of the vehicle and the running duration of the preset control mode are acquired, the method further includes a step of controlling the vehicle to enter the preset control mode, specifically referring to fig. 2, including the following steps:
s201, acquiring third state data of the vehicle;
s202, judging whether the third state data meet set entry conditions or not;
s203, if the third state data meet the entering conditions, controlling the vehicle to enter the preset control mode; and if the third state data does not meet the entry condition, returning to execute the step S201.
Specifically, when the ambient temperature of the vehicle is lower than the minimum value of the temperature range, the third state data includes an engine cooling water temperature, an ambient temperature, a transmission oil temperature, and an engine speed. Correspondingly, the judging whether the third state data meets the set entry condition includes: if the third state data meets any one of the following (1) to (4), judging that the third state data meets a set entry condition; if not, judging that the third state data does not meet the set entry condition;
(1) the temperature of the engine cooling water is smaller than a set third cooling water temperature threshold value;
(2) the ambient temperature is less than a set third cooling water temperature threshold;
(3) the gearbox oil temperature is not greater than the set first gearbox oil temperature threshold value;
(4) the engine speed is not less than the set engine speed threshold.
Among them, the third cooling water temperature threshold value, the first transmission oil temperature threshold value, and the engine speed threshold value in the conditions (1) to (4) may be obtained through experiments. And when the temperature of the environment where the vehicle is located is higher than the maximum value of the temperature range, the third state data comprises the engine oil temperature, the engine water temperature, the gearbox oil temperature and instruction information of a preset control mode. Correspondingly, the judging whether the third state data meets the set entry condition includes: determining that the third state data satisfies the entry condition if the third state data satisfies any one of the following (1) to (4); if not, judging that the third state data does not meet the entry condition;
(1) the temperature of engine oil is greater than the set first engine oil temperature threshold;
(2) the water temperature of the engine is greater than the set threshold value of the water temperature of the engine;
(3) the gearbox oil temperature is greater than the set second gearbox oil temperature threshold value;
(4) the command information of the preset control mode is open.
The first engine oil temperature threshold, the engine water temperature threshold and the second gearbox oil temperature threshold in the conditions (1) - (4) can be obtained through experiments.
When the ambient temperature of the vehicle exceeds a preset temperature range (such as a high-temperature or high-cold environment), the vehicle runs according to a preset control mode so as to protect a hardware system of the vehicle; more importantly, after the vehicle enters the preset control mode, the vehicle is timely controlled to exit the preset control mode when the exit condition is met by monitoring the state data of the vehicle and the duration of the preset control mode, so that the damage to a hardware system of the vehicle caused by the fact that the vehicle is in the preset control mode for a long time under the condition that the vehicle does not need to operate according to the preset control mode is avoided. The method accurately finds out the time when the vehicle exits or enters the preset control mode through condition judgment, so that the vehicle always runs in the most favorable mode for a hardware system, and the effects of reducing the damage of severe environment to the vehicle and improving the vehicle performance are achieved.
Fig. 3 is a flowchart of a control method for a vehicle according to an embodiment of the present invention. Referring to fig. 3, an embodiment of the present invention provides a control method for a vehicle under a condition that an ambient temperature of the vehicle is higher than a maximum value in a preset temperature range (i.e., under a high temperature environment), where the method includes the following steps:
s301, when a vehicle runs in a preset control mode, acquiring first state data of the vehicle and running duration of the preset control mode, wherein the preset control mode is used for protecting a hardware system of the vehicle when the ambient temperature of the vehicle exceeds a preset temperature range;
s302, judging whether the first state data meet a set exit condition and whether the running time length is greater than a set time threshold value;
s303, if the first state data meet the quitting condition and the running time is greater than the time threshold, controlling the vehicle to quit the preset control mode;
s304, if the first state data do not meet the exit condition and/or the running duration is not greater than the time threshold, controlling the vehicle to keep the preset control mode;
s305, acquiring second state data;
s306, judging whether the second state data meet set switching conditions or not;
s307, if the second state data meet the switching condition, controlling the vehicle to be switched from the preset control mode to an enhanced control mode, wherein the enhanced control mode is used for accelerating the heat dissipation of a hardware system by adjusting the operation parameters of the hardware system of the vehicle; and if the second state data does not meet the switching condition, returning to execute the step S301.
In one possible embodiment, the second state data includes an engine oil temperature, an engine cooling water temperature, and a transmission oil temperature. Correspondingly, the judging whether the second state data meets the set switching condition includes: if the second state data meets any one of the following (1) to (3), judging that the second state data meets a set switching condition; if not, judging that the second state data does not meet the set switching condition;
(1) the engine oil temperature is greater than a set second engine oil temperature threshold;
(2) the temperature of the engine cooling water is greater than a set second cooling water temperature threshold value;
(3) the gearbox oil temperature is greater than a set second gearbox oil temperature threshold value.
The embodiment of the invention sets a preset control mode and an enhanced control mode, and when a vehicle runs for a period of time in the preset control mode, the vehicle is timely switched to the enhanced control mode through judgment conditions. Under the preset control mode, the gear-shifting points of the vehicle can perform up-down shifting according to the gear-shifting points of the preset control mode, when the running time of the preset control mode exceeds the set time threshold, the preset control mode is indicated to be insufficient to rapidly cool the vehicle hardware back to the normal control mode, on the basis, whether the condition for entering the reinforced control mode is reached is further judged, if the condition for entering the reinforced control mode is met, the vehicle speed at the upshift point and the vehicle speed at the downshift point of the enhanced control mode are greatly increased compared with the preset control mode, the engine can be operated at a higher rotating speed, so as to accelerate the flow rate of the cooling medium, accelerate the heat dissipation of the parts such as the gear box and the like, quickly cool the hardware of the vehicle and return to the normal control mode, meanwhile, the running time of the vehicle in a high-temperature mode is shortened, and a hardware system of the vehicle is protected.
Fig. 4 is a schematic structural diagram of a control device of a vehicle according to an embodiment of the present invention. Referring to fig. 4, the control apparatus 400 of the vehicle includes an obtaining unit 410, a determining unit 420, a first executing unit 430, and a second executing unit 440.
The obtaining unit 410 is configured to obtain first state data of a vehicle and an operation duration of a preset control mode when the vehicle operates in the preset control mode, where the preset control mode is used to protect a hardware system of the vehicle when an ambient temperature of the vehicle exceeds a preset temperature range;
the determining unit 420 is configured to determine whether the first state data meets a set exit condition and whether the running duration is greater than a set time threshold;
the first executing unit 430 is configured to control the vehicle to exit the preset control mode when the first state data meets the exit condition and the operating duration is greater than the time threshold;
the second executing unit 440 is configured to control the vehicle to maintain the preset control mode when the first state data does not satisfy the exit condition and/or the operation duration is not greater than the time threshold.
In one possible embodiment, the first state data includes accelerator pedal opening, engine cooling water temperature, transmission oil temperature and engine speed when the vehicle is in an ambient temperature below the minimum value of the temperature range. The judgment unit 420 is configured to judge that the first state data satisfies the exit condition when the first state data satisfies any one of (11) to (4) below; if not, judging that the first state data does not meet the exit condition;
(1) the opening degree of an accelerator pedal is greater than a set pedal opening degree threshold value;
(2) the temperature of the cooling water of the engine is greater than a set first cooling water temperature threshold value;
(3) the gearbox oil temperature is greater than a set first gearbox oil temperature threshold value;
(4) the engine speed is less than the set engine speed threshold.
And when the temperature of the environment where the vehicle is located is higher than the maximum value of the temperature range, the first state data comprises the engine oil temperature, the engine water temperature, the gearbox oil temperature and instruction information of a preset control mode. The judging unit 420 is configured to determine that the first state data satisfies the exit condition when the first state data satisfies any one of (1) to (4) below; if not, judging that the first state data does not meet the exit condition;
(1) the engine oil temperature is not greater than a set first engine oil temperature threshold;
(2) the water temperature of the engine is not more than a set engine water temperature threshold;
(3) the gearbox oil temperature is not greater than a set second gearbox oil temperature threshold value;
(4) the command information of the preset control mode is closed.
In one possible embodiment, the second execution unit 440 includes a data acquisition module 441, a determination module 442, and an execution module 443.
The data obtaining module 441 is configured to obtain second status data; the determining module 442 is configured to determine whether the second state data meets a set switching condition; the executing module 443 is configured to control the vehicle to switch from the preset control mode to an enhanced control mode when the second state data meets the switching condition, where the enhanced control mode is used to accelerate heat dissipation of a hardware system by adjusting an operation parameter of the hardware system of the vehicle.
Specifically, the second state data includes an engine oil temperature, an engine cooling water temperature, and a transmission oil temperature. The determining module 442 is configured to determine that the second state data satisfies a set switching condition when the second state data satisfies any one of the following (1) - (3); if not, judging that the second state data does not meet the set switching condition;
(1) the engine oil temperature is greater than a set second engine oil temperature threshold;
(2) the temperature of the engine cooling water is greater than a set second cooling water temperature threshold value;
(3) the gearbox oil temperature is greater than a set second gearbox oil temperature threshold value.
In one possible embodiment, the apparatus further comprises: a third state data acquisition unit for acquiring third state data of the vehicle; a condition judging unit, configured to judge whether the third state data satisfies a set entry condition; and the control unit is used for controlling the vehicle to enter the preset control mode when the third state data meet the entry condition.
Wherein the third state data includes an engine cooling water temperature, an ambient temperature, a transmission oil temperature, and an engine speed when the vehicle is in an ambient temperature that is less than a minimum of the temperature range. The condition judging unit is used for judging that the third state data meets a set entering condition when the third state data meets any one of the following (1) to (4); if not, judging that the third state data does not meet the set entry condition;
(1) the temperature of the engine cooling water is smaller than a set third cooling water temperature threshold value;
(2) the ambient temperature is less than a set third cooling water temperature threshold;
(3) the gearbox oil temperature is not greater than the set first gearbox oil temperature threshold value;
(4) the engine speed is not less than the set engine speed threshold.
And when the temperature of the environment where the vehicle is located is higher than the maximum value of the temperature range, the third state data comprises the engine oil temperature, the engine water temperature, the gearbox oil temperature and instruction information of a preset control mode. The condition judgment unit is configured to judge that the third state data satisfies the entry condition when the third state data satisfies any one of (1) to (4) below; if not, judging that the third state data does not meet the entry condition;
(1) the temperature of engine oil is greater than the set first engine oil temperature threshold;
(2) the water temperature of the engine is greater than the set threshold value of the water temperature of the engine;
(3) the gearbox oil temperature is greater than the set second gearbox oil temperature threshold value;
(4) the command information of the preset control mode is open.
The above apparatus embodiments and method embodiments are based on the same inventive concept.
According to the embodiment of the invention, the time for the vehicle to exit or enter the preset control mode can be accurately found out through condition judgment, so that the vehicle always runs in a mode which is most beneficial to a hardware system, and the effects of reducing the damage of severe environment to the vehicle and improving the vehicle performance are achieved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A control method of a vehicle, characterized by comprising:
when a vehicle runs in a preset control mode, acquiring first state data of the vehicle and running time of the preset control mode, wherein the preset control mode is used for protecting a hardware system of the vehicle when the ambient temperature of the vehicle exceeds a preset temperature range;
judging whether the first state data meet a set exit condition and whether the running time length is greater than a set time threshold value;
if the first state data meet the exit condition and the running time is longer than the time threshold, controlling the vehicle to exit the preset control mode;
if the first state data does not meet the exit condition and/or the running time length is not larger than the time threshold, controlling the vehicle to keep the preset control mode;
when the temperature of the external environment of the vehicle is lower than the minimum value in a preset temperature range, the preset control mode is a high-cold mode, and the first state data comprises the opening degree of an accelerator pedal, the temperature of cooling water of an engine, the temperature of oil in a transmission and the rotating speed of the engine;
when the temperature of the external environment where the vehicle is located is higher than the maximum value in a preset temperature range, the preset control mode is a high-temperature mode, and the first state data comprises the engine oil temperature, the engine water temperature, the gearbox oil temperature and instruction information of the preset control mode;
when the ambient temperature of the vehicle is higher than the maximum value of the temperature range, after controlling the vehicle to maintain the preset control mode, the method further includes:
acquiring second state data;
judging whether the second state data meets a set switching condition or not;
if the second state data meet the switching condition, controlling the vehicle to be switched from the preset control mode to an enhanced control mode, wherein the enhanced control mode is used for accelerating the heat dissipation of a hardware system by adjusting the operation parameters of the hardware system of the vehicle;
and if the second state data do not meet the switching condition, returning to the step of acquiring the first state data of the vehicle and the running time of the preset control mode.
2. The method of claim 1, wherein when the vehicle is in an ambient temperature that is less than a minimum of the temperature range,
the judging whether the first state data meets the set exit condition comprises the following steps: determining that the first state data satisfies the exit condition if the first state data satisfies any one of (1) to (4) below; if not, judging that the first state data does not meet the exit condition;
(1) the opening degree of an accelerator pedal is greater than a set pedal opening degree threshold value;
(2) the temperature of the cooling water of the engine is greater than a set first cooling water temperature threshold value;
(3) the gearbox oil temperature is greater than a set first gearbox oil temperature threshold value;
(4) the engine speed is less than the set engine speed threshold.
3. The method of claim 2, wherein when the vehicle is at an ambient temperature greater than a maximum of the temperature range,
the judging whether the first state data meets the set exit condition comprises the following steps: determining that the first state data satisfies the exit condition if the first state data satisfies any one of (1) to (4) below; if not, judging that the first state data does not meet the exit condition;
(1) the engine oil temperature is not greater than a set first engine oil temperature threshold;
(2) the water temperature of the engine is not more than a set engine water temperature threshold;
(3) the gearbox oil temperature is not greater than a set second gearbox oil temperature threshold value;
(4) the command information of the preset control mode is closed.
4. The method of claim 1, wherein the second state data includes engine oil temperature, engine cooling water temperature, and transmission oil temperature;
the judging whether the second state data meets the set switching condition comprises the following steps: if the second state data meets any one of the following (1) to (3), judging that the second state data meets a set switching condition; if not, judging that the second state data does not meet the set switching condition;
(1) the engine oil temperature is greater than a set second engine oil temperature threshold;
(2) the temperature of the engine cooling water is greater than a set second cooling water temperature threshold value;
(3) the gearbox oil temperature is greater than a set second gearbox oil temperature threshold value.
5. The method of claim 3, wherein before obtaining the first state data of the vehicle and the operation duration of the preset control mode when the vehicle is operating in the preset control mode, further comprising:
acquiring third state data of the vehicle;
judging whether the third state data meets set entry conditions or not;
and if the third state data meet the entry condition, controlling the vehicle to enter the preset control mode.
6. The method of claim 5, wherein the third state data includes an engine cooling water temperature, an ambient temperature, a transmission oil temperature, and an engine speed when the vehicle is in an ambient temperature that is below a minimum of the temperature range;
the judging whether the third state data meets the set entry condition comprises the following steps: if the third state data meets any one of the following (1) to (4), judging that the third state data meets a set entry condition; if not, judging that the third state data does not meet the set entry condition;
(1) the temperature of the engine cooling water is smaller than a set third cooling water temperature threshold value;
(2) the ambient temperature is less than a set third cooling water temperature threshold;
(3) the gearbox oil temperature is not greater than the set first gearbox oil temperature threshold value;
(4) the engine speed is not less than the set engine speed threshold.
7. The method of claim 5, wherein the third status data includes command information for engine oil temperature, engine water temperature, transmission oil temperature, and a preset control mode when the vehicle is in an ambient temperature greater than a maximum value of the temperature range;
the judging whether the third state data meets the set entry condition comprises the following steps: determining that the third state data satisfies the entry condition if the third state data satisfies any one of the following (1) to (4); if not, judging that the third state data does not meet the entry condition;
(1) the temperature of engine oil is greater than the set first engine oil temperature threshold;
(2) the water temperature of the engine is greater than the set threshold value of the water temperature of the engine;
(3) the gearbox oil temperature is greater than the set second gearbox oil temperature threshold value;
(4) the command information of the preset control mode is open.
8. A control apparatus of a vehicle, characterized by comprising:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring first state data of a vehicle and the operation duration of a preset control mode when the vehicle operates in the preset control mode, and the preset control mode is used for protecting a hardware system of the vehicle when the ambient temperature of the vehicle exceeds a preset temperature range; when the temperature of the external environment of the vehicle is lower than the minimum value in a preset temperature range, the preset control mode is a high-cold mode, and the first state data comprises the opening degree of an accelerator pedal, the temperature of cooling water of an engine, the temperature of oil in a transmission and the rotating speed of the engine; when the temperature of the external environment where the vehicle is located is higher than the maximum value in a preset temperature range, the preset control mode is a high-temperature mode, and the first state data comprises the engine oil temperature, the engine water temperature, the gearbox oil temperature and instruction information of the preset control mode;
the judging unit is used for judging whether the first state data meet a set exit condition and whether the running time length is greater than a set time threshold value;
the first execution unit is used for controlling the vehicle to exit the preset control mode when the first state data meet the exit condition and the running duration is greater than the time threshold;
the second execution unit is used for controlling the vehicle to keep the preset control mode when the first state data does not meet the exit condition and/or the running duration is not greater than the time threshold;
the second execution unit comprises a data acquisition module, a judgment module and an execution module;
the data acquisition module is used for acquiring second state data after the vehicle is controlled to keep the preset control mode when the ambient temperature of the vehicle is higher than the maximum value of the temperature range;
the judging module is used for judging whether the second state data meets the set switching condition;
the execution module is used for controlling the vehicle to be switched from the preset control mode to an enhanced control mode when the second state data meet the switching condition, the enhanced control mode is used for accelerating the heat dissipation of a hardware system by adjusting the operation parameters of the hardware system of the vehicle,
and when the second state data do not meet the switching condition, returning to the step of acquiring the first state data of the vehicle and the running time of the preset control mode.
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| CN116163942A (en) * | 2023-02-08 | 2023-05-26 | 阿尔特汽车技术股份有限公司 | Control method and device for electric oil pump of electric automobile oil-cooled power assembly |
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| CN103192832B (en) * | 2013-04-28 | 2016-10-05 | 长城汽车股份有限公司 | Vehicle snow schema control system and corresponding control method |
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| CN105626849A (en) * | 2016-03-21 | 2016-06-01 | 重庆长安汽车股份有限公司 | Winter mode control method of automatic gearbox |
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