CN113566917B - Oil saving amount calculation and test method for shortening vehicle warming process of active grille at low temperature - Google Patents
Oil saving amount calculation and test method for shortening vehicle warming process of active grille at low temperature Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000008569 process Effects 0.000 title claims abstract description 27
- 238000004904 shortening Methods 0.000 title claims abstract description 15
- 238000010792 warming Methods 0.000 title claims abstract description 14
- 238000004364 calculation method Methods 0.000 title claims description 30
- 238000010998 test method Methods 0.000 title claims description 5
- 239000000446 fuel Substances 0.000 claims abstract description 80
- 238000012360 testing method Methods 0.000 claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000000110 cooling liquid Substances 0.000 claims description 27
- 239000002826 coolant Substances 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 11
- 230000007423 decrease Effects 0.000 claims description 6
- 230000036962 time dependent Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000009194 climbing Effects 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000013100 final test Methods 0.000 claims description 3
- 238000013101 initial test Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- BULVZWIRKLYCBC-UHFFFAOYSA-N phorate Chemical compound CCOP(=S)(OCC)SCSCC BULVZWIRKLYCBC-UHFFFAOYSA-N 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
- G01F9/001—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine with electric, electro-mechanic or electronic means
Abstract
The invention provides a method for calculating and testing the fuel consumption of an active grille in a process of shortening the vehicle warming at low temperature, which can be used for measuring and calculating the fuel consumption saving amount generated by the fact that a gasoline vehicle benefits from the reduction of cooling air flow effect by an active grille technology at low temperature.
Description
Technical Field
The invention belongs to the field of oil consumption rate calculation, and particularly relates to an oil saving amount calculation and test method for shortening a vehicle warming process of an active grille at a low temperature.
Background
As shown in fig. 1, the fuel consumption rate is higher when the hot car of the automobile starts, and is gradually stable when the hot car finishes running at a constant speed, and the time required for starting the hot car to heat to a temperature of 70 ℃ in a common condition as shown in fig. 2 is about 516 seconds, so that the detection of the open state and the closed state of the grille is significant in shortening the process of warming the car, reducing the evaluation of the fuel consumption rate, optimizing the starting state of the grille for a vehicle enterprise and saving fuel.
Disclosure of Invention
In view of the above, the present invention is directed to a method for calculating and testing the fuel saving amount of an active grille at low temperature in order to solve the problem that the influence of the opening and closing states of the active grille on the fuel saving rate is not quantitatively evaluated in the hot car process.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the method for calculating and testing the oil saving amount of the active grille in the process of shortening the warm-up at low temperature comprises the following steps of:
s1, deducing an oil saving amount calculation formula, establishing a fuel consumption rate-time coordinate system, and testing the environment temperature T from a constant vehicle speed in the process of warming Coolant Drawing a first curve of the change of the active grille in an ON state and the oil consumption rate with time and a second curve of the change of the active grille in an OFF state and the oil consumption rate with time within the time from the end of the hot car to the end of the climbing to T, and obtaining an oil saving amount calculation formula through the first curve and the second curve;
s2, obtaining related data required by a calculation formula of the fuel saving amount of the tested vehicle, wherein the related data comprises the temperature T of the cooling liquid of the active grille in an on state coolant Time T of ascent to T T_on Temperature T of the cooling liquid in the off state coolant Time T of ascent to T T_off In Off state t T_on Fuel consumption at timeRate ofT in On state T_on Fuel consumption rate at the moment->
S3, t is taken T_on And t T_off ，And->And (5) carrying out the oil saving calculation formula to obtain the oil saving.
Further, the fuel saving amount calculation formula deduces the specific method:
s101, establishing a rectangular coordinate system, wherein the horizontal axis represents time and the vertical axis represents fuel consumption rate;
s102, testing the environment temperature T in the vehicle warming process Coolant To the end of the hot car climb to T, where T is defined T_on Is the temperature T of the cooling liquid of the active grille in the on state coolant The moment of ascent to T, define T T_off Is the temperature T of the cooling liquid in the off state coolant When the vehicle climbs to T, q is the fuel consumption rate at a constant test vehicle speed V, and the q value decreases with time in an on state and an off state and decreases more rapidly in the on state, which is defined asTo t in Off state T_on Fuel consumption rate at time, defined->To t in On state T_on Fuel consumption rate at moment;
s103, drawing a first fuel consumption rate time-varying curve in a grid ON state and a second fuel consumption rate time-varying curve in a grid OFF state, running at a constant test vehicle speed V, wherein the slopes of the first curve and the second curve can be approximately the same value, and marking in a rectangular coordinate systemTime t T_on And t T_off Definition of t in On state T_on Fuel consumption rate at timeFor point N, define t in Off state T_on Fuel consumption rate at the moment->Defining a fuel consumption rate K point at the initial test for the point M, defining a fuel consumption rate L point at the final test of the grille in the off state, wherein the fuel consumption rates of the L point and the N point are the same, connecting KN and NL to draw a curve I, and connecting KL to draw a curve II;
the definition parameter n represents the triangle area S ΔKNL And triangle area S ΔMLN Is substantially equal to the fuel injection rate q, the triangular area S ΔMLN A part corresponding to the total fuel saving amount isArea S of triangle ΔKNL Corresponding to the oil saving amount in the whole process, ΔKNL consists of two parts of ΔMLN and ΔMNK, and the calculated area is taken as the base of MNI.e. < ->
S104, calculating an oil saving amount according to the formula:
further, in step S2, the specific steps for obtaining the relevant data required by the fuel saving calculation formula include:
s201, cooling the vehicle to a test environment temperature, wherein the test environment temperature is a low temperature below zero;
s202, starting the vehicle at a low temperature;
s203, uniformly accelerating to a speed V within 5S;
s204, carrying out tail gas data recording and cooling liquid temperature recording under constant-speed V running, obtaining a time-dependent change curve of the automobile cooling liquid temperature according to the recorded cooling liquid temperature, and obtaining specific moments T of an ON state and an OFF state of the active grille when the temperature is T T_off When the temperature is changed to T in the OFF state of the grid, T T_on When the temperature is changed to T under the condition that the grid is in an ON state;
and->Obtained from the analysis of the tail gas data based on the carbon balance method.
Further, in step S2, the temperature of the cooling liquid is recorded by a temperature test data acquisition device, so as to obtain a time-dependent change curve of the temperature of the cooling liquid of the automobile, and further obtain t T_off And t T_on The temperature test data acquisition equipment adopts a PT100 thermocouple type multichannel transmitting instrument with a voltage value output function;
required by obtaining the calculation formula of the fuel savingAnd->And analyzing and obtaining by adopting a chassis dynamometer rotary drum test bed test system of the CVS tail gas analyzer.
Further, the data flow of the temperature test data acquisition equipment is synchronously acquired with the parameters of a chassis dynamometer drum test bed test system provided with a CVS tail gas analyzer, and the time axes are aligned.
Further, the test environment temperature is seven degrees below zero.
Further, the constant test vehicle speed V of the light passenger vehicle is 31km/h.
Compared with the prior art, the oil saving amount calculation and test method for shortening the vehicle warming process of the active grille at low temperature has the following beneficial effects:
(1) The fuel consumption saving amount generated by the fact that the low-temperature gasoline vehicle benefits from the reduction of the cooling air flow effect by the active grille technology can be measured and calculated, the test result is helpful for helping the vehicle enterprise to improve the design of the vehicle, the product can save fuel more in social practical application, the vehicle enterprise is helped to be promoted to popularize the active grille technology on more vehicle types, and the fuel saving and carbon reduction are achieved.
(2) The active grille shortens the influence of the control of the fuel-saving calculation metering calculation grille in the vehicle warming process on the fuel consumption rate at low temperature, helps the vehicle enterprise to improve the design of the vehicle, saves fuel in the actual application of the product, saves energy and protects the environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the temperature of a coolant, the instantaneous fuel consumption rate and the engine speed of a cold start idle speed of a vehicle at a low temperature according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first half of a cold start of a vehicle at low temperatures according to an embodiment of the present invention;
fig. 3 is a schematic diagram of fuel consumption rate calculation according to an embodiment of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 3, the method for calculating and testing the fuel saving amount of the active grille in the process of shortening the warm-up period at low temperature comprises the following specific steps:
s1, deducing an oil saving amount calculation formula, establishing a fuel consumption rate-time coordinate system, and testing the environment temperature T from a constant vehicle speed in the process of warming Coolant Drawing a first curve of the change of the active grille in an ON state and the oil consumption rate with time and a second curve of the change of the active grille in an OFF state and the oil consumption rate with time within the time from the end of the hot car to the end of the climbing to T, and obtaining an oil saving amount calculation formula through the first curve and the second curve;
s2, obtaining related data required by a calculation formula of the fuel saving amount of the tested vehicle, wherein the related data comprises the temperature T of the cooling liquid of the active grille in an on state coolant Time T of ascent to T T_on Temperature T of the cooling liquid in the off state coolant Climbing upTime T to T T_off In Off state t T_on Fuel consumption rate at timeT in On state T_on Fuel consumption rate at the moment->
S3, t is taken T_on And t T_off ，And->And (5) carrying out the oil saving calculation formula to obtain the oil saving.
The working state of the movable grating is divided into an ON state and an OFF state, the ON state is the state of the grating under normal working, the OFF state is the state that the opening of the active grating reaches full opening, and the two states are compared to obtain the oil saving amount.
The T is typically 70 ℃.
As shown in fig. 3, the fuel saving amount calculation formula derives a specific method:
s101, establishing a rectangular coordinate system, wherein the horizontal axis represents time and the vertical axis represents fuel consumption rate;
s102, testing the environment temperature T in the vehicle warming process Coolant To the end of the hot car climb to T, where T is defined T_on Is the temperature T of the cooling liquid of the active grille in the on state coolant The moment of ascent to T, define T T_off Is the temperature T of the cooling liquid in the off state coolant When the vehicle climbs to T, q is the fuel consumption rate at a constant test vehicle speed V, and the q value decreases with time in an on state and an off state and decreases more rapidly in the on state, which is defined asTo t in Off state T_on Fuel consumption rate at time, defined->To t in On state T_on Fuel consumption rate at moment;
s103, drawing a first fuel consumption rate time-varying curve in a grid ON state and a second fuel consumption rate time-varying curve in a grid OFF state, running at a constant test vehicle speed V, wherein the slopes of the first curve and the second curve can be approximately a fixed value, and marking the time t in a rectangular coordinate system T_on And t T_off Definition of t in On state T_on Fuel consumption rate at timeFor point N, define t in Off state T_on Fuel consumption rate at the moment->Defining a fuel consumption rate K point at the initial test for the point M, defining a fuel consumption rate L point at the final test of the grille in the off state, wherein the fuel consumption rates of the L point and the N point are the same, connecting KN and NL to draw a curve I, and connecting KL to draw a curve II;
the definition parameter n represents the triangle area S ΔKNL And triangle area S ΔMLN Is substantially equal to the fuel injection rate q, the triangular area S ΔMLN A part corresponding to the total fuel saving amount isArea S of triangle ΔKNL Corresponding to the oil saving amount in the whole process, ΔKNL consists of two parts of ΔMLN and ΔMNK, and the calculated area is taken as the base of MNI.e. < ->
S104, calculating an oil saving amount according to the formula:
as shown in fig. 3, in step S2, the specific steps for obtaining the relevant data required by the fuel saving amount calculation formula include:
s201, cooling the vehicle to a test environment temperature, wherein the test environment temperature is a low temperature below zero;
s202, starting the vehicle at a low temperature;
s203, uniformly accelerating to a speed V within 5S;
s204, carrying out tail gas data recording and cooling liquid temperature recording under constant-speed V running, obtaining a time-dependent change curve of the automobile cooling liquid temperature according to the recorded cooling liquid temperature, and obtaining specific moments T of an ON state and an OFF state of the active grille when the temperature is T T_off When the temperature is changed to T in the OFF state of the grid, T T_on When the temperature is changed to T under the condition that the grid is in an ON state;
and->Obtained from the analysis of the tail gas data based on the carbon balance method.
In step S2, as shown in fig. 3, the temperature of the cooling liquid is recorded by a temperature test data acquisition device, so as to obtain a time-dependent variation curve of the temperature of the cooling liquid of the automobile, and further obtain t T_off And t T_on The temperature test data acquisition equipment adopts a PT100 thermocouple type multichannel transmitting instrument with a voltage value output function;
required by obtaining the calculation formula of the fuel savingAnd->And analyzing and obtaining by adopting a chassis dynamometer rotary drum test bed test system of the CVS tail gas analyzer.
The chassis dynamometer rotary drum test bed test system of the CVS tail gas analyzer is in the prior art.
The temperature test data acquisition equipment is in the prior art, and an HVAC test System type environment simulation data acquisition System of DEWSOFT company can be adopted.
As shown in fig. 3, the data flow of the temperature test data acquisition device is synchronously acquired with the parameters of the chassis dynamometer drum test bed test system provided with the CVS tail gas analyzer, and the time axes are aligned.
As shown in fig. 3, the test environment temperature is seven degrees below zero.
As in fig. 3, the constant test vehicle speed V of the light passenger vehicle is 31km/h.
For the Chinese automobile running condition-part 1: the condition that the speed of the light passenger car is not 0 in the working condition CLTC_P of the light car is low and the speed of the light passenger car is not 0 in the middle speed section is averaged to obtain 30.88km/h, so the speed V value of the method is 31km/h, the condition that the speed of the light passenger car is 0 is eliminated, and the method is characterized in that the theoretical wind speed is 0, and in principle, the existence or non-existence of a grid basically has no influence on the hot car process.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The fuel-saving amount calculation and test method for shortening the vehicle warming process of the active grille at low temperature is characterized by comprising the following steps of: the specific calculation steps of the oil saving amount comprise:
s1, deducing an oil saving amount calculation formula, establishing a fuel consumption rate-time coordinate system, and testing the environment temperature T from a constant vehicle speed in the process of warming Coolant Drawing a first curve of the change of the active grille in an ON state and the oil consumption rate with time and a second curve of the change of the active grille in an OFF state and the oil consumption rate with time within the time from the end of the hot car to the end of the climbing to T, and obtaining an oil saving amount calculation formula through the first curve and the second curve;
s2, obtaining related data required by a calculation formula of the fuel saving amount of the tested vehicle, wherein the related data comprises the temperature T of the cooling liquid of the active grille in an on state coolant Time T of ascent to T T_on Temperature T of the cooling liquid in the off state coolant Time T of ascent to T T_off In Off state t T_on Fuel consumption rate at timeT in On state T_on Fuel consumption rate at the moment->
S3, t is taken T_on And t T_off ，And->And (5) carrying out the oil saving calculation formula to obtain the oil saving.
2. The fuel saving amount calculating and testing method for shortening a warm-up process at a low temperature of an active grille according to claim 1, wherein: the fuel saving calculation formula deduces the specific method:
s101, establishing a rectangular coordinate system, wherein the horizontal axis represents time and the vertical axis represents fuel consumption rate;
s102, testing the environment temperature T in the vehicle warming process Coolant To the end of the hot car climb to T, where T is defined T_on Is the temperature T of the cooling liquid of the active grille in the on state coolant The moment of ascent to T, define T T_off Is the temperature T of the cooling liquid in the off state coolant When the vehicle climbs to T, q is the fuel consumption rate at a constant test vehicle speed V, and the q value decreases with time in an on state and an off state and decreases more rapidly in the on state, which is defined asTo t in Off state T_on Fuel consumption rate at time, defined->To t in On state T_on Fuel consumption rate at moment;
s103, drawing a first fuel consumption rate time-varying curve in a grid ON state and a second fuel consumption rate time-varying curve in a grid OFF state, running at a constant test vehicle speed V, wherein the slopes of the first curve and the second curve can be approximately a fixed value, and marking the time t in a rectangular coordinate system T_on And t T_off Definition of t in On state T_on Fuel consumption rate at timeFor point N, define t in Off state T_on Fuel consumption rate at the moment->Defining a fuel consumption rate K point at the initial test for the point M, defining a fuel consumption rate L point at the final test of the grille in the off state, wherein the fuel consumption rates of the L point and the N point are the same, connecting KN and NL to draw a curve I, and connecting KL to draw a curve II;
the definition parameter n represents the triangle area S ΔKNL And triangle area S ΔMLN Is substantially equal to the fuel injection rate q, the triangular area S ΔMLN A part corresponding to the total fuel saving amount isArea S of triangle ΔKNL Corresponding to the oil saving amount in the whole process, ΔKNL consists of two parts of ΔMLN and ΔMNK, and the calculated area is taken as the base of MNI.e. < ->
S104, calculating an oil saving amount according to the formula:
。
3. the fuel saving amount calculating and testing method for shortening the warm-up process of the active grille according to claim 2, wherein: in step S2, the specific steps for obtaining the relevant data required by the fuel saving calculation formula include:
s201, cooling the vehicle to a test environment temperature, wherein the test environment temperature is a low temperature below zero;
s202, starting the vehicle at a low temperature;
s203, uniformly accelerating to a speed V within 5S;
s204, carrying out tail gas data recording and cooling liquid temperature recording under constant-speed V running, obtaining a time-dependent change curve of the automobile cooling liquid temperature according to the recorded cooling liquid temperature, and obtaining specific moments T of an ON state and an OFF state of the active grille when the temperature is T T_off When the temperature is changed to T in the OFF state of the grid, T T_on When the temperature is changed to T under the condition that the grid is in an ON state;
and->Obtained from the analysis of the tail gas data based on the carbon balance method.
4. The fuel saving amount calculating and testing method for shortening a warm-up process at a low temperature of an active grille according to claim 3, wherein: in step S2, the temperature of the cooling liquid is recorded by a temperature test data acquisition device, so as to obtain a time-dependent change curve of the temperature of the cooling liquid of the automobile, and further obtain t T_off And t T_on The temperature test data acquisition equipment adopts a PT100 thermocouple type multichannel transmitting instrument with a voltage value output function;
and->And analyzing and obtaining by adopting a chassis dynamometer rotary drum test bed test system of the CVS tail gas analyzer.
5. The method for calculating and testing the fuel saving amount for shortening the warm-up process at the low temperature of the active grille according to claim 4, wherein the method comprises the following steps: the data flow of the temperature test data acquisition equipment is synchronously acquired with the parameters of a chassis dynamometer drum test bed test system provided with a CVS tail gas analyzer, and the time axes are aligned.
6. The fuel saving amount calculating and testing method for shortening a warm-up process at a low temperature of an active grille according to claim 3, wherein: the test environment temperature is seven degrees below zero.
7. The fuel saving amount calculating and testing method for shortening a warm-up process at a low temperature of an active grille according to claim 3, wherein: the constant test speed V of the light passenger car is 31km/h.
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| CN105069860A (en) * | 2015-07-29 | 2015-11-18 | 厦门雅迅网络股份有限公司 | Method for vehicle oil consumption statistics |
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| CN112197827A (en) * | 2020-10-29 | 2021-01-08 | 安徽江淮汽车集团股份有限公司 | Vehicle oil consumption testing method and device, and storage medium and device |
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2021
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| JPH09177578A (en) * | 1995-12-22 | 1997-07-08 | Nissan Motor Co Ltd | Air-fuel ratio control device for engine |
| JP2009047184A (en) * | 2007-08-13 | 2009-03-05 | Nissan Motor Co Ltd | Temperature rise control device for vehicle drive system |
| WO2010113246A1 (en) * | 2009-03-31 | 2010-10-07 | パイオニア株式会社 | Fuel consumption estimating device fuel consumption estimating method, fuel consumption estimating program and recording medium |
| CN105069860A (en) * | 2015-07-29 | 2015-11-18 | 厦门雅迅网络股份有限公司 | Method for vehicle oil consumption statistics |
| CN110901565A (en) * | 2018-09-14 | 2020-03-24 | 上海擎感智能科技有限公司 | Warm-up time estimation method, system, storage medium and equipment |
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