LNG vehicle range estimation method and vehicle-mounted electronic device thereof

Abstract

A LNG vehicle range estimation method and a vehicle-mounted electronic device thereof. The LNG vehicle range estimation method comprises: obtaining a remaining LNG volume V r in a LNG container of a vehicle; determining a density p of the LNG; determining a total mileage average gas consumption C Tot , a subtotal mileage average gas consumption C trip , and a nearby mileage average gas consumption C rec of the vehicle; and estimating a range R based on the remaining LNG volume V r , the density p, the total mileage average gas consumption C Tot , the subtotal mileage average gas consumption C trip , and the nearby mileage average gas consumption C rec . The LNG vehicle range estimation method and the vehicle-mounted electronic device thereof can accurately estimate the range without changing the overall vehicle architecture, thereby improving the user experience.

Description

TECHNICAL FIELD

[0001] The present application relates to automotive electronics, in particular to a LNG vehicle range estimation method and a vehicle-mounted electronic device thereof. BACKGROUND

[0002] The range prompt function can greatly alleviate the range anxiety of users and guide users to add fuel at the right time. Currently, in order to improve the user experience, most vehicle models have fuel or battery range prompt. However, for LNG (Liquefied Natural Gas) models, the difficulty in estimating the remaining LNG gas volume and the existence of additional auxiliary power output (such as engine work to achieve lifting while parking) result in few LNG models that can realize range prompt and related functions. Although some LNG vehicles on the market realize range prompt, they estimate the range by dividing the remaining gas volume by the average gas consumption, or by dividing the remaining gas volume by the average gas consumption under the recent road conditions (such as assuming that the recent 20KM road conditions are relatively consistent). However, the estimated range result is not accurate, and the user experience is not good. SUMMARY

[0003] The problem solved by the present application is to provide a LNG vehicle range estimation method and a vehicle-mounted electronic device thereof, which can accurately estimate the range without changing the overall vehicle architecture, and improve the user experience.

[0004] To solve the above problems, one aspect of the present application provides a LNG vehicle range estimation method, which comprises: obtaining the remaining LNG volume V r in the LNG container of the vehicle; determining the density p of LNG; determining the total mileage average gas consumption C Tot , the subtotal mileage average gas consumption C trip and the adjacent mileage average gas consumption C rec of the vehicle; and estimating the range R based on the remaining LNG volume V r , the density p, the total mileage average gas consumption C Tot , the subtotal mileage average gas consumption C trip and the adjacent mileage average gas consumption C rec .

[0005] Another aspect of the present application provides a vehicle-mounted electronic device of a LNG vehicle, which comprises: a computer readable storage medium having a plurality of instructions stored thereon; and one or more processors adapted to execute the plurality of instructions to implement the LNG vehicle range estimation method as described above.

[0006] Yet another aspect of the present application 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 execution by the one or more processors, cause the one or more processors to implement the LNG vehicle range estimation method as described above.

[0007] Compared with the prior art, the above scheme has the following advantages:

[0008] The LNG vehicle range estimation method and the vehicle-mounted electronic device thereof according to the present application can accurately calculate the remaining gas amount by dynamically calculating the LNG density, and smoothly reflect the influence of the recent road conditions and working conditions on the range by weighting the total mileage average gas consumption, the subtotal mileage average gas consumption and the adjacent mileage average gas consumption, so as to accurately estimate the range without changing the overall vehicle architecture, and improve the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 A schematic block diagram of a vehicle-mounted electronic device of an LNG vehicle according to one or more embodiments of the present application is illustrated;

[0010] Figure 2 A flowchart of a LNG vehicle range estimation method according to one or more embodiments of the present application is illustrated;

[0011] Figure 3 A flowchart of determining the density of LNG according to one or more embodiments of the present application is illustrated;

[0012] Figure 4 A flowchart of determining the adjacent mileage average gas consumption of a vehicle according to one or more embodiments of the present application is illustrated. DETAILED DESCRIPTION

[0013] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order not to unnecessarily obscure the present application. Also, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0014] Figure 1 A schematic block diagram of a vehicle-mounted electronic device of an LNG vehicle according to one or more embodiments of the present application is illustrated. Reference is made to Figure 1As shown, the on-board electronic device 100 of the 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 which can be executed by the processor 110 to implement the LNG vehicle range estimation method 200 to be introduced as follows. In one or more embodiments, the computer readable storage medium 120 can be a non-volatile computer readable storage medium. In one or more embodiments, the on-board electronic device 100 can be an on-board instrument.

[0015] Figure 2 A flow chart of the LNG vehicle range estimation method according to one or more embodiments of the present application is illustrated. Referring to Figure 2 As shown, the LNG vehicle range estimation method 200 includes the following steps:

[0016] Step 210: obtaining the remaining LNG volume V in the LNG container of the vehicle; r ;

[0017] Step 220: determining the density p of the LNG;

[0018] Step 230: determining the total mileage average gas consumption C of the vehicle; Tot , the subtotal mileage average gas consumption C trip , and the adjacent mileage average gas consumption C rec ; and

[0019] Step 240: estimating the range R based on the remaining LNG volume V r , the density p, the total mileage average gas consumption C Tot , the subtotal mileage average gas consumption C trip , and the adjacent mileage average gas consumption C rec .

[0020] It should be noted that the order of the steps 210, 220 and 230 shown in the method 200 is only illustrative, and the steps 210, 220 and 230 can be executed in any order or simultaneously, and the present application does not limit this. Figure 2

[0021] In step 210, the remaining LNG volume V in the LNG container of the vehicle is obtained. r . Wherein, a sensor or the like can be arranged in the LNG container for detecting the remaining LNG volume V r . Accordingly, the remaining LNG volume V r can be obtained from the sensor.

[0022] In step 220, the density p of the LNG is determined. Figure 3 A flow chart of determining the density of the LNG according to one or more embodiments of the present application is illustrated. Referring to​Figure 3 As shown, determining the density p of the LNG can comprise the following steps:

[0023] Step 221 : After the vehicle is started, it is determined whether there is a valid density value stored in the vehicle within a valid range; if yes, step 222 is performed; if no, step 223 is performed;

[0024] Step 222: the density p is set equal to the valid density value;

[0025] Step 223: the density p is set equal to a standard density value;

[0026] Step 224: it is determined whether the vehicle mileage has increased by a first predetermined mileage; if yes, step 225 is performed; if no, step 224 is returned to;

[0027] Step 225: the density p is calculated based on the total gas consumption mass M Tot obtained from the engine within the first predetermined mileage con and the LNG consumption volume V min obtained from the LNG container within the first predetermined mileage; step 224 is returned to and step 226 is performed;

[0028] Step 226: when the calculated density p is within the valid range, the calculated density p is stored in the memory of the vehicle.

[0029] In step 221, the valid range can be, for example, a lower limit density p max = 0.45 kg / L. In one or more embodiments, the valid density value is stored in a non-volatile computer readable storage medium of the vehicle instrument, such as a flash memory, an EEPROM, etc.

[0030] In step 223, the standard density value can be, for example, p std = 0.364 kg / L.

[0031] In step 224, the first predetermined mileage can be, for example, 20 km. It can be understood that the first predetermined mileage can also be other reasonable values, and the present application does not limit this.

[0032] In step 226, the valid range can also be, for example, a lower limit density p min = 0.35 kg / L, and a lower limit density p max = 0.45 kg / L. In one or more embodiments, the calculated density p is stored in a non-volatile computer readable storage medium of the vehicle instrument, such as a flash memory, an EEPROM, etc.

[0033] Therefore, the LNG vehicle mileage estimation method of the embodiment can dynamically estimate the LNG density by the LNG consumption of the first predetermined mileage, so as to reduce the influence of the gas emission and pressure relief under different regions, different temperatures, different pressure conditions and static conditions on the LNG density.

[0034] With reference to the foregoing Figure 2 In step 230, the total mileage average gas consumption C Tot , the sub-total mileage average gas consumption C trip , and the adjacent mileage average gas consumption C rec are determined.

[0035] In one or more embodiments, the total mileage average gas consumption C Tot may be calculated based on the total mileage gas consumption mass of the vehicle and the total mileage of the vehicle. It should be noted that the total mileage gas consumption mass does not include the LNG mass consumed by the load work in the vehicle parking state. The load work in the vehicle parking state is, for example, the work of the engine in the parking state to realize the lifting, the work of the engine in the long-time stopping state of the vehicle but with the air conditioner turned on, and the like.

[0036] In one or more embodiments, the sub-total mileage average gas consumption C trip may be calculated based on the sub-total mileage gas consumption mass of the vehicle and the sub-total mileage of the vehicle. The sub-total mileage is the trip mileage recorded in the vehicle instrument, which is usually between a few hundred kilometers and a few thousand kilometers. It should also be noted that the sub-total mileage gas consumption mass does not include the LNG mass consumed by the load work in the vehicle parking state. The load work in the vehicle parking state is, for example, the work of the engine in the parking state to realize the lifting, the work of the engine in the long-time stopping state of the vehicle but with the air conditioner turned on, and the like.

[0037] Figure 4 A flowchart for determining the adjacent mileage average gas consumption of the vehicle according to one or more embodiments of the present application is illustrated. With reference to the foregoing Figure 4 , the determination of the adjacent mileage average gas consumption of the vehicle can include the following steps:

[0038] Step 231: After the vehicle is started, it is determined whether the valid adjacent mileage average gas consumption within the valid range is stored in the vehicle; if yes, step 232 is performed; if no, step 233 is performed;

[0039] Step 232: the adjacent mileage average gas consumption C rec is equal to the valid adjacent mileage average gas consumption;

[0040] Step 233: the adjacent mileage average gas consumption C rec is equal to the comprehensive working condition standard gas consumption;

[0041] Step 234: it is determined whether the vehicle mileage is increased by a second predetermined mileage; if yes, step 235 is performed; if no, step 234 is returned.

[0042] Step 235: judging whether the accumulated number of second predetermined mileage is less than a predetermined number; if yes, executing step 236; if no, executing step 237; and returning to step 234;

[0043] Step 236: calculating the proximate mileage average gas consumption C rec based on the accumulated number of second predetermined mileage in an arithmetic average manner;

[0044] Step 237: calculating the proximate mileage average gas consumption C rec based on the most recent predetermined number of second predetermined mileage in a sliding average manner.

[0045] In step 231, the effective range can be, for example, a ±50% range of 0.364 kg / km. In one or more embodiments, the effective proximate mileage average gas consumption storage can be in a non-volatile computer readable storage medium of the on-board instrument, such as a flash memory, an EEPROM, etc.

[0046] In step 233, the comprehensive working condition standard gas consumption C std is average gas consumption information of the vehicle under different working conditions (city / suburb, idling / slowing / shift / acceleration, etc.) according to certain standards (such as the oil consumption and gas consumption test standards of the Ministry of Industry and Information Technology) and technical means, which is used to nominal general standard gas consumption of the vehicle model. The comprehensive working condition standard gas consumption C std may be, for example, 0.364 kg / km.

[0047] In step 234, the second predetermined mileage can be, for example, 5 km. It can be understood that the second predetermined mileage can also be other reasonable values, and the present application does not limit this.

[0048] In step 235, the predetermined number can be, for example, 10. It can be understood that the predetermined number can also be other reasonable values, and the present application does not limit this.

[0049] Step 236 corresponds to the case that the vehicle has not traveled the predetermined number of second predetermined mileage after starting, for example, the case that the vehicle has not traveled 10*5 km. At this time, the proximate mileage average gas consumption C rec is calculated based on the accumulated number of second predetermined mileage in an arithmetic average manner. For example, if 3*5 km has been traveled, the proximate mileage average gas consumption C rec is calculated based on the 3*5 km traveled in an arithmetic average manner. The calculated proximate mileage average gas consumption C recmay be stored in a memory of the vehicle, for example, in a non-volatile computer readable storage medium of an on-board instrument, for example, a flash memory, an EEPROM, etc.

[0050] Step 237 corresponds to a case that the vehicle has traveled a predetermined number of second predetermined distances after being started, for example, a case that the vehicle has traveled 10 times of 5km. At this time, the average fuel consumption C rec of the adjacent distances is calculated in a sliding average manner based on the driving fuel consumptions of the last predetermined number of second predetermined distances. rec For example, if 13 times of 5km have been traveled, the average fuel consumption C rec of the adjacent distances is calculated in a sliding average manner based on the driving fuel consumptions of the last 10 times of 5km. rec may be stored in a memory of the vehicle, for example, in a non-volatile computer readable storage medium of an on-board instrument, for example, a flash memory, an EEPROM, etc.

[0051] The average fuel consumption C rec of the adjacent distances calculated by means of step 235 and step 237 can reflect the fuel consumption of the last road conditions and working conditions, and can make the subsequent estimation of the cruising range more accurate.

[0052] It should be noted that the driving fuel consumptions described in step 236 and step 237 do not include fuel consumptions with a vehicle speed less than a predetermined vehicle speed and a duration exceeding a predetermined time length. The predetermined vehicle speed may, for example, be 3km / h, and the predetermined time length may, for example, be 5 minutes. In this way, the influence of idling fuel consumption and parking auxiliary load output on driving fuel consumption can be avoided, so that the subsequent estimation of the cruising range can be more accurate.

[0053] Continuing to refer to Figure 2 In step 240, the cruising range is estimated by:

[0054] R = V r * p / (a * C Tot + b * C trip + c * C rec )

[0055] wherein a is a weight coefficient of the total distance average fuel consumption C Tot , b is a weight coefficient of the subtotal distance average fuel consumption C trip , and c is a weight coefficient of the average fuel consumption C rec of the adjacent distances. 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.

[0056] In one or more embodiments, the vehicle estimates the range R once every third predetermined distance. The third predetermined distance can be, for example, 1 km. It will be appreciated that the third predetermined distance can also be another reasonable value, and the present application is not limited in this respect.

[0057] In one or more embodiments, the vehicle estimates the range R once every predetermined mass of LNG consumed. The predetermined mass can be, for example, 1 kg. It will be appreciated that the predetermined mass can also be another reasonable value, and the present application is not limited in this respect.

[0058] Although the present application has been disclosed with reference to preferred embodiments, it is to be understood that various changes and modifications can be made which correspond to the spirit and scope of the application as defined in the following claims.

Claims

1. A method of estimating the range of an LNG vehicle, characterized in that, comprise: Obtaining the remaining LNG volume V in the LNG container of the vehicle r ; determining a density p of LNG, comprising: based on a total gas consumption mass M Tot and a LNG consumption volume V con obtained from the LNG container within a first predetermined mileage of vehicle driving range, calculating the density p; when the calculated density p is within a valid range, storing the calculated density p into a memory of the vehicle; after the vehicle is started, if there is a valid density value within the valid range stored in the vehicle, setting the density p equal to the valid density value; otherwise, setting the density p equal to a standard density value; determining the total mileage average fuel consumption C of the vehicle Tot the subtotal mileage average fuel consumption C trip and the adjacent mileage average fuel consumption C rec ; and Based on the remaining LNG volume V r The density ρ and the average gas consumption per mile C Tot The total average gas consumption C for total mileage Tot The weighting coefficient, the average gas consumption C of the trip meter trip The average gas consumption C based on the trip meter trip The weighting coefficient, the average gas consumption C of the nearby mileage rec and the average gas consumption C near the mileage rec The weighting coefficients are used to estimate the driving range R.

2. The LNG vehicle range estimation method of claim 1, wherein, The range R is estimated by the following formula: R = V r p / (a*C Tot +b*C trip +c*C rec ) wherein a is a weight coefficient of the total mileage average fuel consumption C Tot , b is a weight coefficient of the subtotal mileage average fuel consumption C trip , and c is a weight coefficient of the adjacent mileage average fuel consumption C rec .

3. The LNG vehicle range estimation method according to claim 1 or 2, characterized in that, After the vehicle starts, if the vehicle stores the effective near-mileage average gas consumption within the valid range, let the near-mileage average gas consumption C be... rec This equals the average gas consumption of the effective proximity mileage; Otherwise, let the average fuel consumption C rec equal to the standard fuel consumption of the integrated working condition.

4. The LNG vehicle range estimation method of claim 3, wherein, When the vehicle mileage increases by a second predetermined mileage, it is determined whether the number of the second predetermined mileages accumulated is less than a predetermined number, and if so, the fuel consumption per second predetermined mileage based on the accumulated number is calculated as an arithmetic average to obtain the average fuel consumption C for the adjacent mileages rec , and if not, the fuel consumption per second predetermined mileage based on the most recent predetermined number of second predetermined mileages is calculated as a sliding average to obtain the average fuel consumption C for the adjacent mileages rec .

5. The LNG vehicle range estimation method of claim 4, wherein, The driving gas consumption does not include gas consumption when the vehicle speed is less than a predetermined speed and the duration exceeds a predetermined time length.

6. The LNG vehicle range estimation method of claim 1 or 2, wherein, The total mileage average fuel consumption C is calculated based on the total mileage fuel consumption quality of the vehicle and the total mileage of the vehicle Tot .

7. The LNG vehicle range estimation method of claim 1 or 2, wherein, The average fuel consumption C of the vehicle is calculated based on the fuel consumption quality of the small total mileage and the small total mileage. trip .

8. The LNG vehicle range estimation method of claim 1 or 2, wherein, The vehicle estimates the range R once every third predetermined mileage.

9. The LNG vehicle range estimation method of claim 1 or 2, wherein, The vehicle estimates the range R once every predetermined mass of LNG consumption.

10. An on-board electronic device of an LNG vehicle, characterized by, comprise: 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 according to any one of claims 1 to 9.

11. The on-board electronic equipment of the LNG vehicle according to claim 10, characterized in that, The vehicle-mounted electronic device is a vehicle-mounted instrument.

12. A non-volatile computer readable storage medium having stored thereon a plurality of instructions adapted to be executed by one or more processors and that, in response to the execution by the one or more processors, cause the one or more processors to implement the LNG vehicle range estimation method according to any one of claims 1 to 9.

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