CN107901761B - Vehicle speed display method and system - Google Patents
Vehicle speed display method and system Download PDFInfo
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- CN107901761B CN107901761B CN201711079700.4A CN201711079700A CN107901761B CN 107901761 B CN107901761 B CN 107901761B CN 201711079700 A CN201711079700 A CN 201711079700A CN 107901761 B CN107901761 B CN 107901761B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003321 amplification Effects 0.000 claims abstract description 22
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 22
- 238000004364 calculation method Methods 0.000 claims description 10
- 230000006854 communication Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
- 230000007175 bidirectional communication Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- B60K35/00—Arrangement of adaptations of instruments
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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
Abstract
The invention discloses a vehicle speed display method, which comprises the steps of inputting a set value of an active speed limit under the starting of an active speed limit function; the engine controller acquires a set value of the user active speed limit; the engine controller sends the set value of the active speed limit to the instrument, and the instrument directly displays the received set value; obtaining the amplification algorithm of the meter when displaying the vehicle speed, the engine controller carries out reverse operation according to the current active speed limit set value and the amplification algorithm of the meter when displaying the vehicle speed, obtaining the target value of the vehicle speed corresponding to the active speed limit set value, and the engine controller controls the vehicle speed of the vehicle according to the target value. The invention has the advantages that: when the vehicle speed is set, the instrument directly displays the set vehicle speed; after setting, the engine controller receives the set speed value of the active speed limit, and calculates the current set speed according to the reverse direction of the amplification algorithm of the instrument to make the set speed displayed by the instrument, the current displayed speed and the actual speed coordinated and unified.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a vehicle speed display method and system with an active speed limiting function.
Background
With the development of automobile technology, various comfort safety configurations are more and more, and an active speed limiting function is one of safety types. The vehicle with the function can set the maximum speed not to exceed a set value by a user, so that the actual speed of the vehicle does not exceed the set value even if the accelerator is stepped to the bottom in the driving process of the vehicle, and overspeed is avoided.
However, the current meter speed display is larger than the actual speed according to the legal requirements, and if the actual speed is controlled according to the maximum speed displayed by the meter when the vehicle is set by a user, the speed displayed by the meter is slightly higher than the maximum speed set by the user, so that the human-computer experience is poor, the user may think that the speed exceeds the set maximum speed, and the function of limiting the speed actively is problematic.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a vehicle speed display method and a vehicle speed display system, which can overcome the defect of active speed limiting functional failure brought to a user when the vehicle speed is displayed slightly higher than a set speed. In order to achieve the purpose, the invention adopts the technical scheme that: a vehicle speed display method comprises inputting a set value of an active speed limit under the starting of an active speed limit function;
the engine controller acquires a set value of the user active speed limit;
the engine controller sends the set value of the active speed limit to the instrument, and the instrument directly displays the received set value;
obtaining the amplification algorithm of the meter when displaying the vehicle speed, the engine controller carries out reverse operation according to the current active speed limit set value and the amplification algorithm of the meter when displaying the vehicle speed, obtaining the target value of the vehicle speed corresponding to the active speed limit set value, and the engine controller controls the vehicle speed of the vehicle according to the target value.
The input signal is input by a speed setting key arranged on an instrument panel, the active speed limiting function of the automobile is activated, and the set value of the active speed limiting is adjusted through the operation of the speed setting key.
The instrument displays the amplification algorithm of the vehicle speed as follows: the meter displays that the vehicle speed is the actual vehicle speed K1+ K2, K1, K2 are all constants.
The target value of the speed is obtained by reverse operation, the set value of the active speed limit is used as the instrument display speed, the actual speed is obtained according to the calculation formula of the instrument amplification algorithm, the actual speed is the target value of the speed, and the maximum value of the speed of the active speed limit is controlled by the target value of the speed.
The speed setting button on the instrument panel sends the input signal to the engine controller and sends the set value of the active speed limit to the instrument for display through the communication bus, and the engine controller controls the vehicle speed according to the target value of the active speed limit so that the actual vehicle speed does not exceed the target value of the active speed limit.
A vehicle speed display system comprises an input device, an engine controller and an instrument, wherein the input device is connected with the engine controller, and the engine controller is connected with the instrument; activating an active speed limiting function through input equipment, inputting a set value of active speed limiting, and receiving the set value of the active speed limiting by an engine controller and sending the set value of the active speed limiting to an instrument to directly display the set value; the engine controller uses the set value of the active speed limit as the instrument display value, and obtains the corresponding target value of the vehicle speed when the set value of the active speed limit is used as the instrument display value, and the engine controller controls the vehicle speed according to the target value of the vehicle speed.
The engine controller displays the vehicle speed by taking the set value of the active speed limit as an instrument, and calculates the corresponding vehicle speed target value when the set value of the active speed limit is taken as the instrument display value according to a calculation formula of an instrument amplification algorithm, wherein the calculation formula is as follows: the meter displays that the vehicle speed is the actual vehicle speed K1+ K2, K1 and K2 are constants; and taking the set value of the active speed limit as an instrument display value, and obtaining the actual vehicle speed according to a formula, wherein the actual vehicle speed is the target vehicle speed value.
The input device is a vehicle speed setting key arranged on an instrument panel.
The invention has the advantages that: when a user sets the vehicle speed, the instrument directly displays the set vehicle speed without amplification calculation, so that the vehicle speed set by the user can be checked in real time; after the setting is finished, the engine controller receives a set speed value of the active speed limit, and the current set speed is calculated as a target speed according to the reverse direction of the amplification algorithm of the instrument, so that the set speed displayed by the instrument, the current display speed and the actual speed can be coordinated and unified; the set vehicle speed value can be seen in real time during setting, the unification of the set vehicle speed and the display of the instrument display is ensured, after the setting is finished, the engine controller uses the set value as the display value of the actual instrument according to the formula of the amplification algorithm of the instrument, the set value is obtained as the actual vehicle speed corresponding to the display value of the instrument, the actual vehicle speed is used for controlling the vehicle not to exceed the speed, the actual vehicle speed is just the set value of the active speed limit through the amplification algorithm, and thus, the maximum vehicle speed of the vehicle is the set value of the active speed limit when the vehicle runs after the setting is finished, and the unification of the actual maximum vehicle speed and the set value is ensured; meanwhile, the set value is used as the maximum value displayed by the instrument under the active speed limit, so that the actual target value of the speed of the engine is slightly smaller than the set value, the maximum value of the speed of the engine is ensured to be always slightly smaller than the set value under the active speed limit function, and the purpose of speed limit is achieved.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a block diagram of a vehicle speed display system according to the present invention
FIG. 2 is a flow chart showing the enlargement of the present invention.
The labels in the above figures are: 1. an engine controller; 2. a meter; 3. a vehicle speed setting button; 4. hard wires; 5. bidirectional communication bus
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The system related to the vehicle speed display method comprises an engine controller 1, an instrument 2 and a vehicle speed setting button 3, wherein the vehicle speed setting button 3 is connected with a hard wire 4 between the engine controller 1, and a bidirectional communication bus 5 between the engine controller 1 and the instrument 2;
the user activates the active speed limiting function through the operation of the speed setting button 3 on the instrument panel, and can adjust the setting value of the active speed limiting through the operation of the speed setting button 3;
the engine controller 1 obtains an input signal of a vehicle speed setting key 3 through the connection of a hard wire 4, and obtains a signal for activating an active speed limiting function and an action signal for adjusting an active speed limiting setting value by a user;
the engine controller 1 obtains an active speed limit setting value which is intended to be set by a user according to an input signal of the vehicle speed setting key 3;
the engine controller 1 sends an active speed limiting vehicle speed setting value to the instrument 2 through the bidirectional communication bus 5;
after the instrument 2 receives the active speed-limiting vehicle speed set value through the communication bus, the active speed-limiting vehicle speed set value is directly displayed according to the received vehicle speed set value without amplification conversion;
the engine controller 1 carries out reverse calculation according to the current active speed-limiting vehicle speed set value and an amplification algorithm when the meter 2 displays the vehicle speed, and obtains an active speed-limiting vehicle speed target value;
the engine controller 2 controls the vehicle speed according to the active speed-limiting vehicle speed target value, so that the actual vehicle speed does not exceed the active speed-limiting vehicle speed target value.
The instrument displays the amplification algorithm of the vehicle speed as follows: the meter displays that the vehicle speed is the actual vehicle speed K1+ K2, K1, K2 are all constants.
The target value of the speed is obtained by reverse operation, the set value of the active speed limit is used as the instrument display speed, the actual speed is obtained according to the calculation formula of the instrument amplification algorithm, the actual speed is the target value of the speed, and the maximum value of the speed of the active speed limit is controlled by the target value of the speed.
The speed setting button on the instrument panel sends the input signal to the engine controller and sends the set value of the active speed limit to the instrument for display through the communication bus, and the engine controller controls the vehicle speed according to the target value of the active speed limit so that the actual vehicle speed does not exceed the target value of the active speed limit.
The following is further illustrated by the specific examples:
the amplified conversion relation between the display vehicle speed and the actual vehicle speed of a certain instrument is as follows:
display vehicle speed 1.03+1.25
According to the formula, when the actual vehicle speed is 50km/h, the vehicle speed is 52.75km/h and is slightly larger than the actual vehicle speed.
When the user sets the speed of the active speed limit, the engine controller obtains the current speed set by the user as 100km/h through the action signal of the speed setting key.
In the example, a bidirectional communication bus between the engine controller and the instrument is a CAN bus, and the engine controller sends the active speed-limiting vehicle speed setting value of 100km/h to the instrument through the CAN bus.
After the instrument receives the set value of the active speed-limiting vehicle speed through the CAN bus, the set value is directly displayed without amplification, so that the set value of the active speed-limiting vehicle speed is also displayed as 100km/h on the instrument.
Meanwhile, the engine controller reversely calculates the target value of the active speed-limiting vehicle speed (the set value of the active speed-limiting vehicle speed-1.25)/1.03 by the following formula
The calculation gave 95.87km/h ((100-1.25)/1.03).
And the engine controller takes 95.85km/h as a vehicle speed control target and controls the actual vehicle speed to be 95.85 km/h.
The vehicle speed displayed by the instrument at this time is:
95.85*1.03+1.25＝99.98km/h
substantially equal to the speed limit set by the user. By adopting the method, the speed limit function can be always kept with the set speed on the display of the maximum speed, the situation that the speed displayed by the instrument is larger than the set value in the prior art can not occur, secondly, the active speed limiting function can be fully utilized, the general active speed limiting function is that a user does not want the driving speed of the user to exceed a certain value, such as the numerical value of a speed-limiting road section, when the numerical value is exceeded, the penalty can be caused, the speed measuring equipment on the road section may have certain error, and when the speed is controlled by the actual set value, because the error of the speed measuring instrument on the road can possibly detect the overspeed of the vehicle, if the display and control method of the method is adopted, the actual control speed of a vehicle is slightly less than a set value, a certain error range of the velometer is given, and thus the overspeed of the vehicle cannot be measured even if the velometer has an error in real time, so that the function of active speed limiting is realized more accurately.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (3)
1. A vehicle speed display method characterized by:
inputting a set value of the active speed limit under the starting of the active speed limit function;
the engine controller acquires a set value of the user active speed limit;
the engine controller sends the set value of the active speed limit to the instrument, and the instrument directly displays the received set value;
obtaining an amplification algorithm of an instrument when displaying the vehicle speed, carrying out reverse operation by an engine controller according to the current active speed-limiting set value and the amplification algorithm of the instrument when displaying the vehicle speed to obtain a target value of the vehicle speed corresponding to the active speed-limiting set value, and controlling the vehicle speed of the vehicle by the engine controller according to the target value;
the input signal is input by adopting a speed setting key arranged on an instrument panel, the active speed limiting function of the automobile is activated, and the set value of the active speed limiting is adjusted through the operation of the speed setting key;
the instrument displays the amplification algorithm of the vehicle speed as follows: the meter displays that the vehicle speed is the actual vehicle speed K1+ K2, K1 and K2 are constants;
the method comprises the steps of obtaining a speed target value through reverse operation, wherein the speed target value is obtained by taking a set value of an active speed limit as an instrument display speed, obtaining an actual speed according to a calculation formula of an instrument amplification algorithm, wherein the actual speed is the speed target value, and controlling the maximum value of the speed of the active speed limit according to the speed target value;
the speed setting button on the instrument panel sends the input signal to the engine controller and sends the set value of the active speed limit to the instrument for display through the communication bus, and the engine controller controls the vehicle speed according to the target value of the active speed limit so that the actual vehicle speed does not exceed the target value of the active speed limit.
2. A vehicle speed display system characterized by: the system comprises input equipment, an engine controller and an instrument, wherein the input equipment is connected with the engine controller, and the engine controller is connected with the instrument; activating an active speed limiting function through input equipment, inputting a set value of active speed limiting, and receiving the set value of the active speed limiting by an engine controller and sending the set value of the active speed limiting to an instrument to directly display the set value; the engine controller takes the set value of the active speed limit as an instrument display value, and obtains a corresponding vehicle speed target value when the set value of the active speed limit is taken as the instrument display value, and the engine controller controls the vehicle speed according to the vehicle speed target value;
the engine controller displays the vehicle speed by taking the set value of the active speed limit as an instrument, and calculates the corresponding vehicle speed target value when the set value of the active speed limit is taken as the instrument display value according to a calculation formula of an instrument amplification algorithm, wherein the calculation formula is as follows: the meter displays that the vehicle speed is the actual vehicle speed K1+ K2, K1 and K2 are constants; and taking the set value of the active speed limit as an instrument display value, and obtaining the actual vehicle speed according to a formula, wherein the actual vehicle speed is the target vehicle speed value.
3. A vehicle speed display system as claimed in claim 2, wherein: the input device is a vehicle speed setting key arranged on an instrument panel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711079700.4A CN107901761B (en) | 2017-11-06 | 2017-11-06 | Vehicle speed display method and system |
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| CN201711079700.4A CN107901761B (en) | 2017-11-06 | 2017-11-06 | Vehicle speed display method and system |
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| CN107901761B true CN107901761B (en) | 2020-10-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108909455B (en) * | 2018-07-20 | 2020-11-03 | 安徽江淮汽车集团股份有限公司 | Digital vehicle speed display method and system |
| CN113928304B (en) * | 2020-07-10 | 2023-06-09 | 上海汽车集团股份有限公司 | Vehicle longitudinal speed control method and device |
| CN113895226A (en) * | 2021-09-27 | 2022-01-07 | 江西昌河汽车有限责任公司 | Error early warning system and method for actual vehicle speed and vehicle speed displayed by combination instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19646104C1 (en) * | 1996-11-08 | 1998-04-02 | Bosch Gmbh Robert | Device for selecting and displaying speeds |
| DE19835566A1 (en) * | 1998-08-06 | 2000-02-10 | Volkswagen Ag | Display of the desired speed with ADR |
| CN102390267B (en) * | 2011-09-20 | 2014-07-30 | 奇瑞汽车股份有限公司 | Vehicle speed limiting system and control method thereof |
| JP6319199B2 (en) * | 2015-06-16 | 2018-05-09 | トヨタ自動車株式会社 | Vehicle speed limit system |
| CN106585378A (en) * | 2016-11-09 | 2017-04-26 | 浙江吉利控股集团有限公司 | Vehicle speed limiting system and method |
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