CN106564374B - Vehicle speed control method and device - Google Patents
Vehicle speed control method and device Download PDFInfo
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- CN106564374B CN106564374B CN201610921102.6A CN201610921102A CN106564374B CN 106564374 B CN106564374 B CN 106564374B CN 201610921102 A CN201610921102 A CN 201610921102A CN 106564374 B CN106564374 B CN 106564374B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
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Abstract
The invention discloses a vehicle speed control method. The vehicle speed control method includes the steps of: monitoring the running information of the vehicle during the running process of the vehicle; judging whether the driving environment is unfavorable for the driving of the vehicle or not according to the driving information; if so, limiting the highest rotating speed of the engine to be a preset rotating speed, and limiting the highest vehicle speed by limiting the highest rotating speed; if not, if the maximum rotating speed of the engine is limited to the preset rotating speed, the limitation is cancelled. The invention also discloses a vehicle speed control device. According to different vehicle running environments, the maximum speed of the vehicle is actively limited when the running environment is not good, and potential safety hazards are avoided. Meanwhile, when the driving environment is good, the vehicle can be ensured to run at high speed.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a vehicle speed control method and device.
Background
At present, an automobile runs on different running environments, whether on a mountain road or in heavy rain or on a clear highway: it is the same that the vehicle can reach the highest speed. However, when the driving environment is not good, if the driver drives at a high speed, traffic accidents are easily caused, and potential safety hazards are brought to the driver of the vehicle and other drivers of the vehicle.
Disclosure of Invention
The invention mainly aims to provide a vehicle speed control method, which aims to limit the highest vehicle speed of a vehicle in a bad driving environment, avoid potential safety hazards and ensure that the vehicle can drive at a high speed in a good driving environment.
In order to achieve the above object, the present invention provides a vehicle speed control method comprising the steps of:
monitoring the running information of the vehicle during the running process of the vehicle;
judging whether the driving environment is unfavorable for the driving of the vehicle or not according to the driving information;
if so, limiting the highest rotating speed of the engine to be a preset rotating speed, and limiting the highest vehicle speed by limiting the highest rotating speed;
if not, if the maximum rotating speed of the engine is limited to the preset rotating speed, the limitation is cancelled.
Preferably, the monitoring of the driving information of the vehicle during the driving of the vehicle includes: monitoring an operation signal transmitted by a control circuit of the wiper;
the judging whether the running environment is unfavorable for the running of the vehicle according to the running information comprises the following steps: and judging that the working time of the wiper exceeds a first preset time according to the running signal transmitted by the control circuit of the wiper, and judging that the working time is yes.
Preferably, the monitoring of the driving information of the vehicle during the driving of the vehicle includes: monitoring information of the vehicle running road surface angle transmitted by the gyroscope;
the judging whether the running environment is unfavorable for the running of the vehicle according to the running information comprises the following steps: and judging that the road surface angle is larger than a preset angle and continuously exceeds a second preset time length according to the information of the vehicle running road surface angle transmitted by the gyroscope, wherein the judgment is yes.
Preferably, the monitoring of the driving information of the vehicle during the driving of the vehicle includes: monitoring a real-time image shot by a vehicle event data recorder;
the judging whether the running environment is unfavorable for the running of the vehicle according to the running information comprises the following steps: and when the rain or fog in the real-time image is judged according to the real-time image shot by the driving recorder, judging that the rain or fog exists.
Preferably, the limiting the maximum rotation speed of the engine to a preset rotation speed, and the limiting the maximum vehicle speed by limiting the maximum rotation speed includes:
sending a speed limit signal to an engine management system;
when the rotating speed of the engine is higher than the preset rotating speed, reducing the rotating speed of the engine by reducing the fuel injection quantity of the engine.
Further, to achieve the above object, the present invention also provides a vehicle speed control device including:
the monitoring module is used for monitoring the running information of the vehicle in the running process of the vehicle;
the judging module is used for judging whether the driving environment is unfavorable for the driving of the vehicle according to the driving information;
the speed limiting module is used for limiting the maximum rotating speed of an engine to be a preset rotating speed when the running environment is judged to be not favorable for the running of the vehicle according to the obtained running information of the vehicle, and limiting the maximum vehicle speed by limiting the maximum rotating speed;
and the cancellation module cancels the limitation when the running environment is judged not to be unfavorable for the running of the vehicle according to the obtained running information of the vehicle and the maximum rotating speed of the engine is limited to a preset rotating speed.
Preferably, the monitoring module comprises: the first monitoring unit is used for monitoring an operation signal transmitted by a control circuit of the wiper;
the judging module comprises: and the first judging unit is used for judging that the working time of the wiper exceeds a first preset time according to the operation signal transmitted by the control circuit of the wiper, and the judgment is positive.
Preferably, the monitoring module comprises: the second monitoring unit is used for monitoring the information of the vehicle running road surface angle transmitted by the gyroscope;
the judging module comprises: and the second judgment unit is used for judging that the road surface angle is larger than a preset angle and continuously exceeds a second preset time length according to the information of the vehicle running road surface angle transmitted by the gyroscope, and the judgment result is yes.
Preferably, the monitoring module comprises: the third monitoring unit is used for monitoring a real-time image shot by the automobile data recorder;
the judging module comprises: and the third judging unit is used for judging that the real-time image is rain or fog according to the real-time image shot by the traveling data recorder.
Preferably, the speed limit module includes:
the sending unit is used for sending a speed limiting signal to the engine management system;
and the speed reduction unit is used for reducing the rotating speed of the engine by reducing the fuel injection quantity of the engine when the rotating speed of the engine is higher than the preset rotating speed.
The invention monitors the running information of the vehicle in the running process of the vehicle; judging whether the driving environment is unfavorable for the driving of the vehicle or not according to the driving information; if so, limiting the highest rotating speed of the engine to be a preset rotating speed, and limiting the highest vehicle speed by limiting the highest rotating speed; if not, if the maximum rotating speed of the engine is limited to the preset rotating speed, the limitation is cancelled. Therefore, according to different vehicle running environments, the maximum speed of the vehicle is actively limited when the running environment is not good, and potential safety hazards are avoided. Meanwhile, when the driving environment is good, the vehicle can be ensured to run at high speed.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating a vehicle speed control method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram illustrating another embodiment of a vehicle speed control method according to the present invention;
FIG. 3 is a functional block diagram of an embodiment of a vehicle speed device of the present invention;
fig. 4 is a schematic diagram of a detailed function of a limiting module in another embodiment of the vehicle speed device of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention provides a vehicle speed control method, and referring to fig. 1, in a first embodiment of the vehicle speed control method of the present invention, the vehicle speed control method includes:
step S10, monitoring the running information of the vehicle during the running process of the vehicle;
step S20, judging whether the driving environment is unfavorable for the vehicle to drive according to the driving information;
whether the vehicle running environment is favorable for vehicle running is judged through analysis of the running information, for example, whether the running environment is rainy days or foggy days is judged.
If the driving environment is judged to be not favorable for the driving of the vehicle according to the acquired driving information of the vehicle, executing a step S30, limiting the maximum rotating speed of the engine to a preset rotating speed, and limiting the maximum vehicle speed by limiting the maximum rotating speed;
when the running environment is not favorable for the running of the vehicle, in order to be safer, the invention actively limits the maximum speed of the vehicle by limiting the maximum rotating speed of the engine of the vehicle, thereby avoiding safety accidents caused by high-speed running when the running environment of the vehicle is not good.
And if the running environment is not unfavorable for the running of the vehicle according to the acquired running information of the vehicle, executing step S40, and if the maximum rotating speed of the engine is limited to the preset rotating speed, cancelling the limitation.
When the vehicle running environment is not unsafe, if the maximum rotation speed of the engine is limited, the maximum speed limit of the vehicle is cancelled to ensure that the user can run at high speed, and if the maximum rotation speed of the engine is not limited, the processing is not carried out.
Specifically, the method comprises the following steps: when the vehicle runs on a road surface with accumulated snow, by monitoring the running information of the vehicle, when the running information shows that the vehicle continuously slips, the running environment is confirmed to be unfavorable for the running of the vehicle. The maximum rotating speed of the engine is limited to 2000 rpm, and the corresponding vehicle speed is 40 km/h, so that the vehicle cannot run at high speed; when it is not determined that the vehicle is running in snow based on the running information, it is checked whether the maximum rotation speed of the engine has been limited, and if so, the limitation of the maximum rotation speed of the engine to 2000 rpm is cancelled, so that the vehicle can run at full speed. The embodiment enables the vehicle to automatically select different maximum vehicle speeds according to different driving environments, thereby ensuring the safety when the driving environment is not good and ensuring that the vehicle can drive at a high speed when the driving environment is good.
Based on the first embodiment of the vehicle speed control method of the invention, in the second embodiment of the vehicle speed control method of the invention, the step S10 includes: monitoring an operation signal transmitted by a control circuit of the wiper;
the control circuit of the automobile wiper is provided with a monitoring circuit, when the wiper works, a first level signal is sent, a second level signal is sent at regular time in the working state, when the wiper finishes working, a third level signal is sent, and the working time of the wiper is judged according to the occurrence time difference of the third level signal and the first level signal.
In some embodiments, when the wiper starts to work, a level signal is sent and is continued until the wiper stops working, and the working time of the wiper is calculated according to the duration length of the level signal.
The step S20 includes: and judging that the working time of the wiper exceeds a first preset time according to the running signal transmitted by the control circuit of the wiper, and judging that the working time is yes.
When the operating time of the wiper exceeds a preset time, the vehicle is considered to be driven in the rain or in the environment influencing the sight of the driver. Specifically, the method comprises the following steps: the first preset time is 2 minutes, when the wiper starts to work, a first level signal which is sent by a control circuit of the wiper and indicates the start is sent, then every 20 seconds, a second level signal which is sent by the monitoring circuit and indicates the work is received, when a third level signal which indicates the end is received for the 3 rd time, the time that the whole wiper is opened does not exceed 2 minutes, the running environment is judged not to be unfavorable for the running of the vehicle, whether the maximum rotating speed of the engine is limited or not is checked, and if the maximum rotating speed of the engine is limited, the maximum rotating speed limit of the engine is released; as described above, if the third level signal is received only 20 th time, it can be obtained that the time for which the entire wiper is turned on exceeds 2 minutes, it is determined that the vehicle driving environment is not favorable for the vehicle to drive, the maximum rotation speed of the engine is immediately limited to 2000 rpm, the maximum vehicle speed is limited, and a traffic accident caused by high-speed vehicle driving is avoided.
Based on the first embodiment of the vehicle speed control method of the invention, in the third embodiment of the vehicle speed control method of the invention, the step S10 includes: monitoring information of the vehicle running road surface angle transmitted by the gyroscope;
the step S20 includes: and judging that the road surface angle is larger than a preset angle and continuously exceeds a second preset time length according to the information of the vehicle running road surface angle transmitted by the gyroscope, wherein the judgment is yes.
Specifically, the method comprises the following steps: the preset angle is 20 degrees, the second preset time is 60 seconds, and the gyroscope also has the capability of detecting vehicle turning data, and when the vehicle turns, the preset turning times are as follows: turning for less than 140 degrees for 10 times, more specifically, the driving angle of the vehicle comes from a second preset time, the data of the information transmitted by the gyroscope exceeds a preset percentage, the vehicle continuously receives the angle information transmitted by the gyroscope during driving, the gyroscope checks that the vehicle drives for 61 seconds at an elevation angle of 21 degrees or at a depression angle of 21 degrees, more specifically, when 90% of the data in the information transmitted by the gyroscope within 61 seconds shows that the vehicle actually drives for 21 degrees uphill or downhill, the maximum rotating speed of the engine is limited to 2000 revolutions per minute, and under continuous monitoring, if the gyroscope checks that the vehicle drives for 61 seconds at an elevation angle or a depression angle of 19 degrees, the rotating speed limit of the engine is cancelled at 2000 revolutions per minute; and when the vehicle is detected to have 11 turns less than 140 degrees in 60 seconds, the vehicle is considered to run in an environment unfavorable for driving, and the maximum rotating speed of the engine is limited to 2000 rpm. The maximum rotating speed of the engine can be actively limited in excessive turning, rain or mountain roads so as to limit the maximum speed of the vehicle and ensure safety.
Based on the first embodiment of the vehicle speed control method of the invention, in the fourth embodiment of the vehicle speed control method of the invention, the step S10 includes: monitoring a real-time image shot by a vehicle event data recorder;
the step S20 includes: and when the rain or fog in the real-time image is judged according to the real-time image shot by the driving recorder, judging that the rain or fog exists.
The method comprises the steps of utilizing pictures shot by a vehicle event data recorder in real time, carrying out high-frequency image acquisition on the pictures, carrying out sampling analysis on each picture, and judging the vehicle running environment, wherein for example, if a plurality of bright spots are added in the pictures, the pictures can be regarded as being in rainy days, and the pictures can be judged to be yes.
Specifically, the method comprises the following steps: when a vehicle runs in the rain, sampling the picture of the automobile data recorder within a preset time, more specifically, continuously sampling and analyzing the picture every 30 seconds within five minutes, and when a large number of bright spots appear in a picture fixed area, judging that the vehicle runs in the rain; and if the picture has a large-area gray background, judging that the vehicle is driven in the fog. Actively limiting the maximum rotating speed of the engine to 2000 revolutions per minute, and under the continuous monitoring, if the picture is continuously sampled and analyzed every 30 seconds within five minutes, and when a bright point or a gray background of a fixed area of the picture disappears, canceling the rotating speed limit of the engine of 2000 revolutions per minute. Therefore, the maximum rotating speed of the engine can be actively limited in rainy days so as to limit the maximum speed of the vehicle and ensure safety.
It should be noted that, in some embodiments, in order to obtain a picture more favorable for analysis, when a sampling picture is taken, a part of a detection area of the picture is strongly irradiated with parallel light beams, so that the captured raindrops are more easily recognized.
Referring to fig. 2, according to the first embodiment of the vehicle speed control method of the present invention, in a fifth embodiment of the vehicle speed control method of the present invention, when the driving environment is not favorable for driving the vehicle, the limiting the maximum rotation speed of the engine to the preset rotation speed includes:
step S31, sending a speed limit signal to an engine management system;
there are many methods for reducing the engine speed, and there are methods for passively reducing the intake air amount or the exhaust gas amount, but in order to protect the engine, the engine is actively reduced by controlling the engine using the engine management system or an ECU (Electronic Control Unit).
And step S32, when the rotating speed of the engine is higher than the preset rotating speed, reducing the rotating speed of the engine by reducing the fuel injection quantity of the engine.
Specifically, the method comprises the following steps: and sending a speed limiting signal meeting the CAN protocol to the engine management system through the CAN bus. When the rotating speed of the engine is 2000 rpm, the engine management system actively adjusts the engine, reduces oil injection, reduces the rotating speed of the engine, and starts normal oil injection after the speed is reduced by 2000 rpm, so that the rotating speed of the engine does not exceed 2000 rpm, the maximum speed of the vehicle is limited, the maximum speed of the vehicle in poor running environment is limited, and safety is guaranteed.
The present invention also provides a vehicle speed control device, which, with reference to fig. 3, in a first embodiment of a vehicle speed control method of the present invention, includes:
the monitoring module 10 is used for monitoring the running information of the vehicle in the running process of the vehicle;
the judging module 20 is used for judging whether the driving environment is unfavorable for the driving of the vehicle according to the driving information;
whether the vehicle running environment is favorable for vehicle running is judged through analysis of the running information, for example, whether the running environment is rainy and foggy is judged.
The speed limiting module 30 is used for limiting the maximum rotating speed of the engine to be a preset rotating speed when the running environment is judged to be not favorable for the running of the vehicle according to the obtained running information of the vehicle, and limiting the maximum vehicle speed by limiting the maximum rotating speed;
when the running environment is not favorable for the running of the vehicle, in order to be safer, the invention actively limits the maximum speed of the vehicle by limiting the maximum rotating speed of the engine of the vehicle, thereby avoiding safety accidents caused by high-speed running when the running environment of the vehicle is not good.
And the cancellation module 40 cancels the limitation when the running environment is judged not to be unfavorable for the running of the vehicle according to the obtained running information of the vehicle and the maximum rotating speed of the engine is limited to a preset rotating speed.
When the vehicle running environment is not unsafe, if the maximum rotation speed of the engine is limited, the maximum speed limit of the vehicle is cancelled to ensure that the user can run at high speed, and if the maximum rotation speed of the engine is not limited, the processing is not carried out.
Specifically, the method comprises the following steps: when a vehicle runs on a road surface with accumulated snow, monitoring running information of the vehicle through the monitoring module 10, and when the judging module 20 judges that the vehicle continuously slips according to the running information, confirming that a running environment is not favorable for the vehicle to run, and starting the speed limiting module 30 to limit the maximum rotating speed of an engine to 2000 rpm and the corresponding vehicle speed to 40 km/h, so that the vehicle cannot run at a high speed; when the determination module 20 does not determine that the vehicle is running in snow based on the running information, the start cancellation module 40 checks whether the maximum engine speed has been limited, and cancels the limitation of the maximum engine speed of 2000 rpm if limited. So that the vehicle can run at full speed. The embodiment enables the vehicle to automatically select different maximum vehicle speeds according to different driving environments, thereby ensuring the safety when the driving environment is not good and ensuring that the vehicle can drive at a high speed when the driving environment is good.
In accordance with the first embodiment of the vehicle speed control apparatus of the invention, in the second embodiment of the vehicle speed control apparatus of the invention, the monitoring module 10 includes: the first monitoring unit is used for monitoring an operation signal transmitted by a control circuit of the wiper;
the control circuit of the automobile wiper is provided with a monitoring circuit, when the wiper works, a first level signal is sent, a second level signal is sent at regular time in the working state, when the wiper finishes working, a third level signal is sent, and the working time of the wiper is judged according to the occurrence time difference of the third level signal and the first level signal.
In some embodiments, when the wiper starts to work, a level signal is sent and is continued until the wiper stops working, and the working time of the wiper is calculated according to the duration length of the level signal.
The judging module 20 includes: and the first judging unit is used for judging that the working time of the wiper exceeds a first preset time according to the operation signal transmitted by the control circuit of the wiper, and the judgment is positive.
When the operating time of the wiper exceeds a preset time, the vehicle is considered to be driven in the rain or in the environment influencing the sight of the driver. Specifically, the method comprises the following steps: the first preset time is 2 minutes, when the wiper starts to work, a control circuit of the wiper sends a first level signal indicating the start, then every 20 seconds, the first monitoring unit receives a second level signal indicating the work sent by the monitoring circuit, when the first monitoring unit receives a third level signal indicating the end for the 3 rd time, the time that the whole wiper is started can be obtained and does not exceed 2 minutes, the first judging unit judges that the running environment is not unfavorable for the running of the vehicle, whether the maximum rotating speed of an engine is limited or not is checked, and if the maximum rotating speed of the engine is limited, the maximum rotating speed limit of the engine is released; as described above, if it is the 20 th time when the first monitoring unit receives the third level signal, it can be obtained that the time for which the entire wiper is turned on exceeds 2 minutes, the first determining unit determines that the vehicle driving environment is not favorable for the vehicle to drive, immediately limits the maximum rotation speed of the engine to 2000 rpm, and limits the maximum vehicle speed, thereby avoiding a traffic accident caused by high-speed driving of the vehicle.
In accordance with the first embodiment of the vehicle speed control apparatus of the invention, in the third embodiment of the vehicle speed control apparatus of the invention, the monitoring module 10 includes: the second monitoring unit is used for monitoring the information of the vehicle running road surface angle transmitted by the gyroscope;
the judging module 20 includes: and the second judgment unit is used for judging that the road surface angle is larger than a preset angle and continuously exceeds a second preset time length according to the information of the vehicle running road surface angle transmitted by the gyroscope, and the judgment result is yes.
Specifically, the method comprises the following steps: the preset angle is 20 degrees, the second preset time is 60 seconds, and the gyroscope also has the capability of detecting vehicle turning data, and when the vehicle turns, the preset turning times are as follows: turning for less than 140 degrees for 10 turns, more specifically, the driving angle of the vehicle is from a second preset time, the information transmitted by the gyroscope exceeds a preset percentage of data, the vehicle is in driving, the second monitoring unit continuously receives the angle information transmitted by the gyroscope, the gyroscope checks that the vehicle is driving for 61 seconds at an elevation angle of 21 degrees or at a depression angle of 21 degrees, more specifically, when 90% of the data in the information transmitted by the gyroscope within 61 seconds shows that the vehicle is actually driving for 21 degrees uphill or downhill, the second judging unit judges that the vehicle is in a driving environment unfavorable for driving, the maximum rotation speed of the engine is limited to 2000 turns/minute, and under the continuous monitoring of the second monitoring unit, if the gyroscope checks that the vehicle is driving for 61 seconds at an elevation angle or a depression angle of 19 degrees, the second determination unit determines that the vehicle is in a running environment that is not favorable for running, and cancels the 2000 rpm limit of the engine; when the second monitoring unit detects that the number of times that the vehicle turns for 11 times is less than 140 degrees within 60 seconds, the vehicle is considered to run in an environment unfavorable for driving, and the second judging unit judges that the vehicle runs in the environment unfavorable for running and limits the maximum rotating speed of the engine to 2000 rpm, so that the maximum rotating speed of the engine can be actively limited in too many turns, rain or mountain roads to limit the maximum speed of the vehicle, and the safety is ensured.
In a fourth embodiment of the vehicle speed control apparatus according to the present invention, based on the first embodiment of the vehicle speed control apparatus according to the present invention, the monitoring module 10 includes: the third monitoring unit is used for monitoring a real-time image shot by the automobile data recorder;
the judging module 20 includes: and the third judging unit is used for judging that the real-time image is rain or fog according to the real-time image shot by the traveling data recorder.
The method comprises the steps of utilizing pictures shot by a vehicle event data recorder in real time, carrying out high-frequency image acquisition on the pictures, carrying out sampling analysis on each picture, and judging the vehicle running environment, wherein for example, if a plurality of bright spots are added in the pictures, the pictures can be regarded as being in rainy days, and the pictures can be judged to be yes.
Specifically, the method comprises the following steps: when a vehicle runs in the rain, sampling the picture of the automobile data recorder within a preset time, more specifically, the third monitoring unit continuously samples and analyzes the picture every 30 seconds within five minutes, and when a large number of bright spots appear in a picture fixed area, judging that the vehicle runs in the rain; and if the picture has a large-area gray background, judging that the vehicle is driven in the fog. The maximum rotating speed of the engine is actively limited to 2000 rpm, under continuous monitoring, if the third monitoring unit continuously samples and analyzes the picture every 30 seconds within five minutes, and the third judging unit judges that when a bright spot or a gray background of a picture fixing area disappears, 2000 rpm limiting of the engine is cancelled, so that the maximum rotating speed of the engine can be actively limited in rainy days, the maximum vehicle speed of the vehicle is limited, and safety is guaranteed.
It should be noted that, in some embodiments, in order to obtain a picture more favorable for analysis, when a sampling picture is taken, a part of a detection area of the picture is strongly irradiated with parallel light beams, so that the raindrops taken are more easily recognized.
Referring to fig. 4, based on the first embodiment of the vehicle speed control device of the present invention, in a fifth embodiment of the vehicle speed control device of the present invention, the speed limit module 30 includes:
a sending unit 31, configured to send a speed limit signal to an engine management system;
there are many methods for reducing the engine speed, and there are methods for passively reducing the intake air amount or the exhaust gas amount, but in order to protect the engine, the engine is actively reduced by controlling the engine using the engine management system or an ECU (Electronic Control Unit).
And a speed reduction unit 32 for reducing the rotation speed of the engine by reducing the fuel injection amount of the engine when the rotation speed of the engine is higher than the preset rotation speed.
Specifically, the method comprises the following steps: the sending unit 31 sends the speed limit signal meeting the CAN protocol to the engine management system through the CAN bus. When the engine speed is 2000 rpm, the engine management system starts the speed reduction unit 32 to adjust the engine, reduce oil injection, reduce the engine speed, and start normal oil injection after the speed is reduced by 2000 rpm, so that the engine speed does not exceed 2000 rpm, the maximum vehicle speed is limited, the maximum speed of the vehicle in poor running environment is limited, and safety is guaranteed.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A vehicle speed control method characterized by comprising the steps of:
monitoring the running information of the vehicle during the running process of the vehicle;
monitoring the travel information includes: monitoring a real-time image shot by a driving recorder, wherein the vehicle speed control method further comprises the step of irradiating the local part of the picture detection area with strong light by using parallel light beams;
judging whether the driving environment is unfavorable for the driving of the vehicle or not according to the driving information;
if so, limiting the highest rotating speed of the engine to be a preset rotating speed, and limiting the highest vehicle speed by limiting the highest rotating speed;
if not, if the maximum rotating speed of the engine is limited to the preset rotating speed, the limitation is cancelled;
the monitoring of the running information of the vehicle during the running process of the vehicle comprises the following steps: monitoring an operation signal transmitted by a control circuit of a wiper, setting the monitoring circuit for the control circuit of the wiper, sending a first level signal when the wiper works, sending a second level signal at regular time in a working state, sending a third level signal when the wiper finishes working, and judging the working time of the wiper according to the time difference of the third level signal and the first level signal;
the judging whether the running environment is unfavorable for the running of the vehicle according to the running information further comprises: judging that the working time of the wiper exceeds a first preset time according to an operation signal transmitted by a control circuit of the wiper, and judging that the working time is yes;
the monitoring of the running information of the vehicle during the running process of the vehicle comprises the following steps: monitoring information of the vehicle running road surface angle transmitted by the gyroscope;
the judging whether the running environment is unfavorable for the running of the vehicle according to the running information comprises the following steps: and judging that the road surface angle is larger than a preset angle and continuously exceeds a second preset time length according to the information of the vehicle running road surface angle transmitted by the gyroscope, wherein the judgment is yes.
2. The vehicle speed control method according to claim 1, wherein the determining whether the running environment is unfavorable for the running of the vehicle based on the running information includes: and when the rain or fog exists in the real-time image according to the real-time image shot by the automobile data recorder, judging that the rain or fog exists in the real-time image.
3. The vehicle speed control method according to claim 1 or 2, wherein the limiting a maximum rotation speed of an engine to a preset rotation speed, the limiting the maximum vehicle speed by limiting the maximum rotation speed includes:
sending a speed limit signal to an engine management system;
when the rotating speed of the engine is higher than the preset rotating speed, reducing the rotating speed of the engine by reducing the fuel injection quantity of the engine.
4. A vehicle speed control apparatus, characterized by comprising:
the monitoring module is used for monitoring the running information of the vehicle in the running process of the vehicle, the monitoring module comprises a third monitoring unit, the third monitoring unit is used for monitoring a real-time image shot by a vehicle data recorder, and the vehicle speed control device is also used for carrying out strong light irradiation on the local part of a picture detection area by using parallel light beams;
the judging module is used for judging whether the driving environment is unfavorable for the driving of the vehicle according to the driving information;
the speed limiting module is used for limiting the maximum rotating speed of the engine to be a preset rotating speed when the driving environment is judged to be not favorable for the driving of the vehicle according to the driving information, and limiting the maximum vehicle speed by limiting the maximum rotating speed;
a cancellation module that cancels the restriction when it is determined that the driving environment is not unfavorable for the driving of the vehicle and the maximum rotation speed of the engine has been restricted to a preset rotation speed according to the driving information;
the monitoring module includes: the first monitoring unit is used for monitoring an operation signal transmitted by a control circuit of the wiper; the first monitoring unit is also used for setting a monitoring circuit for a control circuit of a wiper, sending a first level signal when the wiper works, sending a second level signal at regular time in a working state, sending a third level signal when the wiper finishes working, and judging the working time of the wiper according to the time difference of the occurrence of the third level signal and the first level signal;
the judging module comprises: the first judging unit is used for judging that the working time of the wiper exceeds a first preset time according to the running signal transmitted by the control circuit of the wiper, and the judgment is yes;
the monitoring module includes: the second monitoring unit is used for monitoring the information of the vehicle running road surface angle transmitted by the gyroscope;
the judging module comprises: and the second judgment unit is used for judging that the road surface angle is larger than a preset angle and continuously exceeds a second preset time length according to the information of the vehicle running road surface angle transmitted by the gyroscope, and the judgment result is yes.
5. The vehicle speed control apparatus according to claim 4, wherein the determination module includes: and the third judging unit is used for judging that the real-time image is rain or fog according to the real-time image shot by the automobile data recorder.
6. The vehicle speed control apparatus according to claim 4 or 5, wherein the speed limit module includes:
the sending unit is used for sending a speed limiting signal to the engine management system;
and the speed reduction unit is used for reducing the rotating speed of the engine by reducing the fuel injection quantity of the engine when the rotating speed of the engine is higher than the preset rotating speed.
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| CN201610921102.6A CN106564374B (en) | 2016-10-20 | 2016-10-20 | Vehicle speed control method and device |
| PCT/CN2017/071866 WO2018072357A1 (en) | 2016-10-20 | 2017-01-20 | Vehicle speed control method and device |
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| CN108248385B (en) * | 2017-12-25 | 2021-03-16 | 长沙中联消防机械有限公司 | Self-adaptive speed limiting method and system under complex environment and rail fire truck |
| CN109501593A (en) * | 2018-11-28 | 2019-03-22 | 安徽合力股份有限公司 | A kind of modular cart speed limit system and method for fork truck |
| CN111186442B (en) * | 2020-01-13 | 2022-06-24 | 惠龙易通国际物流股份有限公司 | Vehicle control method and device |
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| CN106564374A (en) | 2017-04-19 |
| WO2018072357A1 (en) | 2018-04-26 |
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