CN116039386A - LNG vehicle endurance mileage estimation method and vehicle-mounted electronic equipment thereof - Google Patents
LNG vehicle endurance mileage estimation method and vehicle-mounted electronic equipment thereof Download PDFInfo
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- CN116039386A CN116039386A CN202211541998.7A CN202211541998A CN116039386A CN 116039386 A CN116039386 A CN 116039386A CN 202211541998 A CN202211541998 A CN 202211541998A CN 116039386 A CN116039386 A CN 116039386A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
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Abstract
An LNG vehicle endurance mileage estimation method and vehicle-mounted electronic equipment thereof. The LNG vehicle endurance mileage estimation method comprises the following steps: acquiring residual LNG volume V in LNG container of vehicle r The method comprises the steps of carrying out a first treatment on the surface of the Determining the density ρ of LNG; determining a total mileage average gas consumption C of a vehicle Tot Average gas consumption C of odometer trip And average gas consumption C of adjacent mileage rec The method comprises the steps of carrying out a first treatment on the surface of the Based on the remaining LNG volume V r Average gas consumption C of density ρ and total mileage Tot Average gas consumption C of odometer trip And average gas consumption C of adjacent mileage rec And estimating the endurance mileage R. According to the LNG vehicle range estimation method and the vehicle-mounted electronic device thereof, the range can be accurately estimated under the condition that the whole vehicle framework is not changed, and the user experience is improved.
Description
Technical Field
The invention relates to automotive electronics, in particular to an LNG vehicle endurance mileage estimation method and vehicle-mounted electronic equipment thereof.
Background
The range prompt function can greatly relieve the range anxiety of the user and guide the user to add fuel at proper time, and the current mainstream vehicle type has fuel or battery range prompt for improving the user experience. However, for LNG (Liquefied Natural Gas ) vehicle types, the residual LNG gas amount is difficult to estimate, and the existence of additional auxiliary power output (for example, stopping but engine acting to realize lifting and the like) results in few LNG vehicle types capable of realizing relevant functions such as range prompt and the like. Although some LNG vehicles on the market realize the range prompt, the range is estimated by dividing the residual gas amount by the average gas consumption, or by dividing the residual gas amount by the average gas consumption under the latest road condition (for example, assuming that the latest 20KM road condition is relatively consistent). However, the estimated endurance mileage results of the modes are inaccurate, and the user experience is poor.
Disclosure of Invention
The invention solves the problem of providing an LNG vehicle range estimation method and vehicle-mounted electronic equipment thereof, which can accurately estimate the range without changing the whole vehicle framework, and improve the user experience.
In order to solve the above problems, an aspect of the present invention provides a LNG vehicle range estimation method, which includes: acquiring residual LNG volume V in LNG container of vehicle r The method comprises the steps of carrying out a first treatment on the surface of the Determining the density ρ of LNG; determining a total mileage average gas consumption C of a vehicle Tot Average gas consumption C of odometer trip And average gas consumption C of adjacent mileage rec The method comprises the steps of carrying out a first treatment on the surface of the Based on the remaining LNG volume V r The density rho and the average gas consumption C of the total mileage Tot The average gas consumption C of the meter mileage trip And the average gas consumption C of the adjacent mileage rec And estimating the endurance mileage R.
Another aspect of the present invention provides an in-vehicle electronic apparatus of an LNG vehicle, comprising: a computer readable storage medium having stored thereon a plurality of instructions; the one or more processors are adapted to execute the plurality of instructions to implement the LNG vehicle range estimation method as described above.
Yet another aspect of the invention provides a non-transitory computer-readable storage medium having stored thereon a plurality of instructions adapted to be executed by one or more processors, the plurality of instructions in response to being executed by the one or more processors, causing the one or more processors to implement the LNG vehicle range estimation method as described above.
Compared with the prior art, the scheme has the following advantages:
according to the LNG vehicle range estimation method and the vehicle-mounted electronic device thereof, the residual gas is accurately calculated through dynamic calculation of the LNG density, the influence of the nearest road condition and the working condition on the range is stably reflected through the weighting of the average gas consumption of the total range, the average gas consumption of the minor range and the average gas consumption of the adjacent range, the range can be accurately estimated under the condition that the whole vehicle framework is not changed, and the user experience is improved.
Drawings
FIG. 1 illustrates a schematic block diagram of an on-board electronics of an LNG vehicle in accordance with one or more embodiments of the present invention;
FIG. 2 illustrates a flow diagram of a method of estimating range of an LNG vehicle in accordance with one or more embodiments of the present invention;
FIG. 3 illustrates a flow diagram for determining the density of LNG in accordance with one or more embodiments of the present invention;
FIG. 4 illustrates a flow diagram for determining average gas consumption for nearby mileage of a vehicle in accordance with one or more embodiments of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention to those skilled in the art. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Furthermore, it should be understood that the invention is not limited to specific described embodiments. Rather, the invention can be considered to be implemented with any combination of the following features and elements, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly set out in a claim.
Fig. 1 illustrates a schematic block diagram of an on-board electronics of an LNG vehicle in accordance with one or more embodiments of the present invention. Referring to fig. 1, an in-vehicle electronics 100 of an LNG vehicle includes one or more processors 110 and a computer-readable storage medium 120. The computer readable storage medium 120 has stored thereon a plurality of instructions that the processor 110 may execute to implement the LNG vehicle range estimation method 200 as will be described below. In one or more embodiments, the computer-readable storage medium 120 may be a non-volatile computer-readable storage medium. In one or more embodiments, the in-vehicle electronic device 100 may be an in-vehicle meter.
FIG. 2 illustrates a flow diagram of a method of estimating range of an LNG vehicle in accordance with one or more embodiments of the invention. Referring to fig. 2, the LNG vehicle range estimation method 200 includes the steps of:
step 210: acquiring residual LNG volume V in LNG container of vehicle r ；
Step 220: determining the density ρ of LNG;
step 230: determining a total mileage average gas consumption C of a vehicle Tot Average gas consumption C of odometer trip And average gas consumption C of adjacent mileage rec The method comprises the steps of carrying out a first treatment on the surface of the And
step 240: based on the residual LNG volume V r Average gas consumption C of density ρ and total mileage Tot Average gas consumption C of odometer trip And average gas consumption C of adjacent mileage rec And estimating the endurance mileage R.
It should be noted that the order of steps 210, 220 and 230 shown in fig. 2 is merely illustrative, and steps 210, 220 and 230 may be performed in any order, or simultaneously, and the present invention is not limited thereto.
At step 210, a remaining LNG volume V within an LNG container of a vehicle is obtained r . Wherein a sensor or the like for detecting the volume V of the remaining LNG may be provided in the LNG container r . Accordingly, the volume V of the remaining LNG can be obtained from the sensor r 。
At step 220, the density ρ of the LNG is determined. Fig. 3 illustrates a flow diagram for determining the density of LNG in accordance with one or more embodiments of the invention. Referring to fig. 3, determining the density ρ of LNG may include the steps of:
step 221: after the vehicle is started, judging whether an effective density value in an effective interval is stored in the vehicle; if yes, go to step 222; if not, go to step 223;
step 222: let density ρ equal to the effective density value;
step 223: let density ρ equal to the standard density value;
step 224: judging whether the driving mileage of the vehicle is increased by a first preset mileage; if yes, go to step 225; if not, go back to step 224;
step 225: based on a total gas consumption mass M within a first predetermined range obtained from the engine Tot And a LNG consumption volume V within a first predetermined mileage taken from the LNG container con Calculating density rho; returning to step 224 and executing step 226;
step 226: when the calculated density ρ is within the effective interval, the calculated density ρ is stored into a memory of the vehicle.
In step 221, the effective interval may be, for example: lower limit density ρ min =0.35 kg/L, lower limit density ρ max =0.45 kg/L. In one or more embodiments, the effective density value is stored in a non-volatile computer readable storage medium of the onboard meter, such as flash memory, EEPROM, or the like.
In step 223, the standard density value may be ρ, for example std ＝0.364kg/L。
In step 224, the first predetermined mileage may be, for example, 20km. It will be appreciated that the first predetermined mileage may be other reasonable values, and the invention is not limited in this regard.
In step 226, the effective interval may be as follows: lower limit density ρ min =0.35 kg/L, lower limit density ρ max =0.45 kg/L. In one or more embodiments, the calculated density ρ is stored in a non-volatile computer readable storage medium of the onboard meter, such as flash memory, EEPROM, or the like.
In this way, the LNG vehicle range estimation method according to the embodiment can dynamically estimate the density of the LNG vehicle range by using the LNG consumption of the nearest first predetermined range, and can reduce the influence of the deflation and pressure relief on the LNG density in different areas, different temperatures, different pressure conditions and static conditions.
With continued reference to FIG. 2, at step 230, a total mileage average gas consumption C of the vehicle is determined Tot Average gas consumption C of odometer trip And average gas consumption C of adjacent mileage rec 。
In one or more embodiments, the total mileage may be calculated based on the total mileage gas consumption quality of the vehicle and the total mileage of the vehicleAverage gas consumption C Tot . The total mileage gas consumption quality does not include the LNG quality consumed by the load working in the stopped state of the vehicle. The load in the parking state of the vehicle performs work such as parking but the engine performs work to realize the conditions of lifting, long-time stopping of the vehicle but starting of an air conditioner and the like.
In one or more embodiments, the sub-meter mileage average gas consumption C may be calculated based on the sub-meter mileage gas consumption mass and the sub-meter mileage of the vehicle trip . Where the subtotal mileage is the trip mileage recorded in the vehicle meter, typically between hundreds of kilometers and thousands of kilometers. The same applies to the LNG quality consumed by the load work in the stopped state of the vehicle. The load in the parking state of the vehicle performs work such as parking but the engine performs work to realize the conditions of lifting, long-time stopping of the vehicle but starting of an air conditioner and the like.
FIG. 4 illustrates a flow diagram for determining average gas consumption for nearby mileage of a vehicle in accordance with one or more embodiments of the present invention. Referring to fig. 4, determining the average gas consumption of the near mileage of the vehicle may include the steps of:
step 231: after the vehicle is started, judging whether the average gas consumption of the effective adjacent mileage in the effective interval is stored in the vehicle; if yes, go to step 232; if not, go to step 233;
step 232: average gas consumption C of adjacent mileage rec Equal to the average gas consumption of the effective adjacent mileage;
step 233: average gas consumption C of adjacent mileage rec The standard gas consumption is equal to the standard gas consumption of the comprehensive working condition;
step 234: judging whether the driving mileage of the vehicle is increased by a second preset mileage; if yes, go to step 235; if not, go back to step 234;
step 235: judging whether the number of the accumulated second preset mileage is smaller than the preset number; if yes, go to step 236; if not, go to step 237; returning to step 234;
step 236: calculating average gas consumption C of adjacent mileage in arithmetic average mode based on running gas consumption of second preset mileage of accumulated number rec ；
Step 237: calculating the average gas consumption C of the adjacent mileage in a sliding average manner based on the latest driving gas consumption of the preset number of second preset mileage rec 。
In step 231, the effective interval may be, for example, a + -50% interval of 0.364kg/km. In one or more embodiments, the effective near mileage average gas consumption storage may be in a non-volatile computer readable storage medium of the onboard meter, such as flash memory, EEPROM, or the like.
In step 233, the integrated operating mode standard gas consumption C std Average gas consumption information tested according to certain standards (such as fuel consumption of a working department, gas consumption testing standard) and technical means for vehicles under different working conditions (city/suburb, idle speed/deceleration/gear shifting/acceleration and the like) is used for nominal standard gas consumption of the vehicle type. Comprehensive working condition standard gas consumption C std For example, it may be 0.364kg/km.
The second predetermined mileage may be, for example, 5km at step 234. It will be appreciated that the second predetermined mileage may be other reasonable values, and the invention is not limited in this regard.
In step 235, the predetermined number may be, for example, 10. It will be appreciated that the predetermined number may be any other reasonable number, and the invention is not limited in this regard.
Step 236 corresponds to a situation in which a predetermined number of second predetermined mileage have not been traveled after the vehicle is started, for example, 10 5km have not been traveled. At this time, the average gas consumption C of the adjacent mileage is calculated in an arithmetically averaged manner based on the running gas consumption of the second predetermined mileage of the accumulated number rec . For example, if 35 km are currently travelled, the average gas consumption C of the adjacent mileage is calculated in an arithmetic average manner by the 3 driving gas consumption of 5km rec . Calculated average gas consumption C of adjacent mileage rec May be stored in a memory of the vehicle, for example in a non-volatile computer readable storage medium of the vehicle meter, for example in a flash memory, EEPROM, etc.
Step 237 corresponds to a situation in which a predetermined number of second predetermined mileage has been travelled after the vehicle is started, e.g10 cases of 5km have been travelled. At this time, the average gas consumption C of the adjacent mileage is calculated in a sliding average manner based on the latest predetermined number of the second predetermined mileage gas consumptions rec . For example, when 13 5km are currently travelled, the average gas consumption C of the adjacent mileage is calculated in a running average manner by the latest 10 running gas consumptions of 5km rec . Calculated average gas consumption C of adjacent mileage rec May be stored in a memory of the vehicle, for example in a non-volatile computer readable storage medium of the vehicle meter, for example in a flash memory, EEPROM, etc.
Average gas consumption C of adjacent mileage calculated by means of step 235 and step 237 rec The gas consumption of the latest road conditions and working conditions can be reflected, and the subsequent continuous voyage mileage estimation can be more accurate.
It should be noted that the running air consumption described in step 236 and step 237 does not include air consumption having a vehicle speed less than a predetermined vehicle speed and a duration exceeding a predetermined time period. The predetermined vehicle speed may be, for example, 3km/h, and the predetermined time period may be, for example, 5 minutes. Therefore, the influence of idle gas consumption and parking auxiliary load output on driving gas consumption can be avoided, so that the subsequent continuous voyage mileage estimation can be more accurate.
With continued reference to fig. 2, at step 240, the range is estimated by:
R＝V r *ρ/(a*C Tot +b*C trip +c*C rec )
wherein a is the average gas consumption C of the total mileage Tot B is the average gas consumption C of the mileage of the small scale trip And C is the average gas consumption C of the adjacent mileage rec Weight coefficient of (c) in the above-mentioned formula (c). In one or more embodiments, a<b<c. In one or more embodiments, a+b+c=1. In one or more embodiments, a is 0.1, b is 0.3, and c is 0.6.
In one or more embodiments, the range R is estimated once per third predetermined range of travel of the vehicle. Wherein the third predetermined mileage may be, for example, 1km. It will be appreciated that the third predetermined mileage may be other reasonable values, and the invention is not limited in this regard.
In one or more embodiments, the range R is estimated every time the vehicle consumes a predetermined mass of LNG. The predetermined mass may be, for example, 1kg. It will be appreciated that the predetermined mass may be other reasonable values, and the invention is not limited in this regard.
While the invention has been described in terms of preferred embodiments, the invention is not so limited. Any person skilled in the art shall not depart from the spirit and scope of the present invention and shall accordingly fall within the scope of the invention as defined by the appended claims.
Claims (15)
1. The LNG vehicle endurance mileage estimation method is characterized by comprising the following steps of:
acquiring residual LNG volume V in LNG container of vehicle r ；
Determining the density ρ of LNG;
determining a total mileage average gas consumption C of a vehicle Tot Average gas consumption C of odometer trip And average gas consumption C of adjacent mileage rec The method comprises the steps of carrying out a first treatment on the surface of the And
based on the remaining LNG volume V r The density rho and the average gas consumption C of the total mileage Tot The average gas consumption C of the meter mileage trip And the average gas consumption C of the adjacent mileage rec And estimating the endurance mileage R.
2. The LNG vehicle range estimation method of claim 1, wherein the range is estimated by:
R＝V r *ρ/(a*C Tot +b*C trip +c*C rec )
wherein a is the average gas consumption C of the total mileage Tot B is the average gas consumption C of the small mileage trip C is the average gas consumption C of the adjacent mileage rec Weight coefficient of (c) in the above-mentioned formula (c).
3. The LNG vehicle range estimation method according to claim 1 or 2, wherein after the vehicle is started, if an effective density value in an effective section is stored in the vehicle, the density ρ is made equal to the effective density value; otherwise, let the density ρ equal to the standard density value.
4. The LNG vehicle range estimation method as claimed in claim 3, wherein each time the vehicle range increases by a first predetermined range, the total gas consumption mass M within the first predetermined range obtained from the engine is based on Tot And an LNG consumption volume V within said first predetermined mileage taken from the LNG container con The density ρ is calculated.
5. The LNG vehicle range estimation method of claim 4, wherein the calculated density ρ is stored in a memory of the vehicle when the calculated density ρ is within a valid interval.
6. The LNG vehicle range estimation method according to claim 1 or 2, wherein after the vehicle is started, if the average gas consumption of the effective adjacent mileage in the effective interval is stored in the vehicle, the average gas consumption C of the adjacent mileage is set rec Equal to the average gas consumption of the effective adjacent mileage; otherwise, the average gas consumption C of the adjacent mileage is made rec Is equal to the standard gas consumption of the comprehensive working condition.
7. The LNG vehicle range estimation method according to claim 6, wherein each time a second predetermined range is added to a vehicle range, it is determined whether the number of accumulated second predetermined ranges is smaller than a predetermined number, and if so, the adjacent range average gas consumption C is calculated in an arithmetically averaged manner based on the running gas consumption of the accumulated second predetermined ranges rec The method comprises the steps of carrying out a first treatment on the surface of the If not, calculating the average gas consumption C of the adjacent mileage in a sliding average manner based on the latest driving gas consumption of a preset number of second preset mileage rec 。
8. The LNG vehicle range estimation method of claim 7 wherein the driving gas consumption does not include a gas consumption having a vehicle speed less than a predetermined vehicle speed and a duration exceeding a predetermined length of time.
9. The LNG vehicle range estimation method according to claim 1 or 2, wherein the total mileage average gas consumption C is calculated based on a total mileage gas consumption mass of the vehicle and a total mileage of the vehicle Tot 。
10. The LNG vehicle range estimation method according to claim 1 or 2, wherein the average gas consumption C of the sub-metering mileage is calculated based on the gas consumption quality of the sub-metering mileage and the sub-metering mileage of the vehicle trip 。
11. The LNG vehicle range estimation method according to claim 1 or 2, wherein the range R is estimated once per third predetermined range of travel of the vehicle.
12. The LNG vehicle range estimation method according to claim 1 or 2, wherein the range R is estimated every time the vehicle consumes a predetermined mass of LNG.
13. An in-vehicle electronic apparatus of an LNG vehicle, comprising:
a computer readable storage medium having stored thereon a plurality of instructions;
one or more processors adapted to execute the plurality of instructions to implement the LNG vehicle range estimation method of any one of claims 1 to 12.
14. The in-vehicle electronics of the LNG vehicle of claim 13, wherein the in-vehicle electronics is an in-vehicle meter.
15. A non-transitory computer readable storage medium having stored thereon a plurality of instructions adapted to be executed by one or more processors, the plurality of instructions in response to being executed by the one or more processors, causing the one or more processors to implement the LNG vehicle range estimation method of any of claims 1-12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211541998.7A CN116039386A (en) | 2022-12-02 | 2022-12-02 | LNG vehicle endurance mileage estimation method and vehicle-mounted electronic equipment thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211541998.7A CN116039386A (en) | 2022-12-02 | 2022-12-02 | LNG vehicle endurance mileage estimation method and vehicle-mounted electronic equipment thereof |
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| CN116039386A true CN116039386A (en) | 2023-05-02 |
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| CN202211541998.7A Pending CN116039386A (en) | 2022-12-02 | 2022-12-02 | LNG vehicle endurance mileage estimation method and vehicle-mounted electronic equipment thereof |
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