阅读说明：本技术 基于车窗玻璃透射率的汽车油耗测试系统及其测试方法 (Automobile oil consumption testing system and method based on window glass transmissivity ) 是由 李子云 李峥 李海波 刘颖文 罗鑫 于 2021-07-21 设计创作，主要内容包括：本发明公开了一种基于车窗玻璃透射率的汽车油耗测试系统,参数获取模块获取乘员舱温度、油耗、各个位置的车窗玻璃透射率和各个位置的车窗玻璃面积；参数处理模块根据乘员舱温度差和车窗玻璃平均透射率差得到第一系数,根据第一系数、车辆各个位置的车窗玻璃面积以及车窗玻璃透射率差得到乘员舱平均温度差,根据油耗差以及乘员舱平均温度差得到第二系数；控制模块控制车辆执行静置照射阶段、油耗测试阶段和油耗评价阶段。本发明还公开了一种基于车窗玻璃透射率的汽车油耗测试系统的测试方法,包括静置照射阶段、油耗测试阶段和油耗评价阶段。本发明建立了车窗玻璃透射率与油耗之间的量化关系,为设计车辆基于油耗设计目标来选取车窗玻璃提供指导。(The invention discloses an automobile oil consumption testing system based on the transmissivity of window glass.A parameter acquisition module acquires the temperature and oil consumption of a passenger compartment, the transmissivity of the window glass at each position and the area of the window glass at each position; the parameter processing module obtains a first coefficient according to the temperature difference of the passenger compartment and the average transmission rate difference of the window glass, obtains the average temperature difference of the passenger compartment according to the first coefficient, the area of the window glass at each position of the vehicle and the transmission rate difference of the window glass, and obtains a second coefficient according to the oil consumption difference and the average temperature difference of the passenger compartment; the control module controls the vehicle to execute a standing irradiation stage, an oil consumption testing stage and an oil consumption evaluation stage. The invention also discloses a test method of the automobile oil consumption test system based on the transmissivity of the window glass, which comprises a standing irradiation stage, an oil consumption test stage and an oil consumption evaluation stage. The invention establishes the quantitative relation between the transmissivity of the window glass and the oil consumption and provides guidance for selecting the window glass based on the oil consumption design target in designing the vehicle.)

1. The utility model provides a car oil consumption test system based on window glass transmissivity which characterized in that: comprises a parameter acquisition module (100), a parameter processing module (200), a control module (300) and an execution unit (400);

the parameter acquisition module (100) is used for acquiring the temperature of the passenger compartment, the oil consumption, the transmittance of the window glass at each position and the area of the window glass at each position;

the parameter processing module (200) is used for obtaining a first coefficient according to the passenger compartment temperature difference and the window glass average transmission rate difference of a plurality of vehicles relative to a reference vehicle, obtaining the passenger compartment average temperature difference of the vehicle according to the first coefficient, the window glass area and the window glass transmission rate difference of each position of the vehicle, and obtaining a second coefficient according to the fuel consumption difference and the passenger compartment average temperature difference of the plurality of vehicles relative to the reference vehicle;

the control module (300) is used for controlling the vehicle to execute a standing irradiation stage, an oil consumption testing stage and an oil consumption evaluation stage;

standing and irradiating: closing the engine and the windows of the vehicle, and enabling the vehicle to stand for a second set time under the set illumination intensity to obtain the temperature of the passenger compartments of the plurality of vehicles;

oil consumption testing stage: and starting an automobile air conditioner, setting the same air conditioner parameters, controlling the vehicle to run under the specified working condition of the oil consumption test, and measuring the oil consumption of a plurality of vehicles.

2. The automotive fuel consumption testing system based on the transmittance of the window glass of claim 1, wherein: the control module (300) is further configured to control the vehicle to perform a warm-up phase;

and (3) a warm-up stage: the method comprises the steps of closing an automobile air conditioner, opening a window and an engine, and controlling the automobile to run at a set speed for a first set time.

3. The automotive fuel consumption testing system based on the transmittance of the window glass of claim 1, wherein: the parameter processing module (200) is further used for obtaining the average transmittance of the window glass according to the transmittance of the window glass at each position and the area of the window glass at each position.

4. The automotive fuel consumption testing system based on the transmittance of the window glass of claim 1, wherein: the parameter processing module (200) is further used for obtaining the ratio of the temperature difference of the passenger compartment of the plurality of vehicles relative to the reference vehicle to the average transmittance difference of the window glass, and performing curve fitting on the plurality of ratios to obtain a first coefficient.

5. The automotive fuel consumption testing system based on the transmittance of the window glass of claim 1, wherein: the parameter processing module (100) is further configured to obtain ratios of oil consumption differences of the plurality of vehicles relative to a reference vehicle to the average temperature difference of the passenger compartment, and perform curve fitting on the ratios to obtain a second coefficient.

6. A test method of an automobile oil consumption test system based on the transmissivity of window glass is characterized by comprising the following steps:

standing and irradiating: closing the engine and the windows of the vehicle, and enabling the vehicle to stand for a second set time under the set illumination intensity to obtain the temperature of the passenger compartments of the plurality of vehicles;

selecting a reference vehicle, obtaining a first coefficient according to passenger compartment temperature differences and window glass average transmission rate differences of a plurality of vehicles relative to the reference vehicle, and obtaining a passenger compartment average temperature difference of the vehicle according to the first coefficient, window glass areas of all positions of the vehicle and the window glass transmission rate differences, wherein the passenger compartment average temperature difference is an average value of passenger compartment temperature differences contributed by the window glasses of all the positions;

oil consumption testing stage: starting an automobile air conditioner, setting the same air conditioner parameters, controlling the vehicle to run under the specified working condition of an oil consumption test, and measuring the oil consumption of a plurality of vehicles;

and obtaining a second coefficient according to the oil consumption difference of the plurality of vehicles relative to the reference vehicle and the average temperature difference of the passenger compartment, wherein the second coefficient is the ratio of the oil consumption difference to the average temperature difference of the passenger compartment.

7. The test method of the vehicle oil consumption test system based on the transmittance of the vehicle window glass is characterized in that: a warm-up stage is also included before the standing irradiation stage;

and (3) a warm-up stage: the method comprises the steps of closing an automobile air conditioner, opening a window and an engine, and controlling the automobile to run at a set speed for a first set time.

8. The test method of the vehicle oil consumption test system based on the transmittance of the vehicle window glass is characterized in that: the method for determining the average transmittance of the window glass comprises the step of obtaining the transmittance of the window glass at each position and the area of the window glass at each position.

9. The test method of the vehicle oil consumption test system based on the transmittance of the vehicle window glass is characterized in that: the method for determining the first coefficient comprises the steps of obtaining the ratio of the temperature difference of the passenger compartment of a plurality of vehicles relative to a reference vehicle to the average transmittance difference of the window glass, and carrying out curve fitting on the plurality of ratios to obtain the first coefficient.

10. The test method of the vehicle oil consumption test system based on the transmittance of the vehicle window glass is characterized in that: the determining method of the second coefficient comprises the steps of obtaining the ratio of the oil consumption difference of a plurality of vehicles relative to a reference vehicle to the average temperature difference of the passenger compartment, and carrying out curve fitting on the plurality of ratios to obtain the second coefficient.

Technical Field

The invention relates to the technical field of oil consumption testing, in particular to an automobile oil consumption testing system based on the transmissivity of window glass and a testing method thereof.

Background

Solar energy transfers heat energy through the glass, is absorbed by the vehicle body interior trim and the glass, and enables the temperature in the vehicle to rise under the action of convection. The temperature in the vehicle can be reduced by reducing the heat energy transferred by the glass, thereby reducing the energy consumption of external circulation technologies such as an air conditioner and the like, reducing the energy required for cooling the passenger cabin and keeping the comfort of passengers, and finally reducing the fuel consumption of the whole vehicle. Passenger cars are equipped with technologies/devices that have significant energy saving effects in practical use, but cannot (completely) be measured in existing test methods, with full car glass of lower Tts.

Chinese patent CN109724661A discloses a method for measuring and calculating fuel consumption of a vehicle in a low temperature environment, which includes a process and a method for measuring and calculating actual fuel consumption when an air conditioner of the vehicle is turned on. However, the influence of the transmittance of the window glass on the temperature rise in the passenger compartment is not considered, and only the influence of the ambient temperature on the fuel consumption is considered.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a vehicle oil consumption testing system and a testing method thereof based on the transmissivity of vehicle window glass.

In order to achieve the aim, the invention provides an automobile oil consumption testing system based on the transmissivity of window glass, which comprises a parameter acquisition module, a parameter processing module, a control module and an execution unit, wherein the parameter acquisition module is used for acquiring the transmissivity of the window glass;

the parameter acquisition module is used for acquiring the temperature and the oil consumption of the passenger compartment, the transmittance of the window glass at each position and the area of the window glass at each position;

the parameter processing module is used for obtaining a first coefficient according to the passenger compartment temperature difference and the window glass average transmission rate difference of the plurality of vehicles relative to the reference vehicle, obtaining the passenger compartment average temperature difference of the vehicle according to the first coefficient, the window glass area of each position of the vehicle and the window glass transmission rate difference, and obtaining a second coefficient according to the fuel consumption difference and the passenger compartment average temperature difference of the plurality of vehicles relative to the reference vehicle;

the control module is used for controlling the vehicle to execute a standing irradiation stage, an oil consumption testing stage and an oil consumption evaluation stage;

standing and irradiating: closing the engine and the windows of the vehicle, and enabling the vehicle to stand for a second set time under the set illumination intensity to obtain the temperature of the passenger compartments of the plurality of vehicles;

oil consumption testing stage: starting an automobile air conditioner, setting the same air conditioner parameters, controlling the vehicle to run under the specified working condition of an oil consumption test, and measuring the oil consumption of a plurality of vehicles;

further, the control module is also used for controlling the vehicle to execute a warm-up stage;

and (3) a warm-up stage: the method comprises the steps of closing an automobile air conditioner, opening a window and an engine, and controlling the automobile to run at a set speed for a first set time.

Further, the parameter processing module is also used for obtaining the average transmittance of the window glass according to the transmittance of the window glass at each position and the area of the window glass at each position.

Further, the parameter processing module is also used for obtaining the average transmissivity Tts-averg of the car window glass according to the following formula

Where m is the number of pieces of vehicle window glass, j is the window glass at the jth position, Tts_jIs the window glass transmittance of the jth position, S_jIs the area of the window glass at the jth position, and S is the total area of the vehicle window glass.

Further, the parameter processing module is further configured to obtain ratios of temperature differences of passenger compartments of the plurality of vehicles with respect to the reference vehicle and average transmittance differences of the window glasses, and perform curve fitting on the ratios to obtain a first coefficient.

Further, the parameter processing module is also used for obtaining the average temperature difference Delta T of the passenger compartment according to the following formula_j

Wherein K is a first coefficient, Δ Tts_jThe window glass transmittance difference at the jth position.

Further, the parameter processing module 100 is further configured to obtain ratios of oil consumption differences of the plurality of vehicles with respect to the reference vehicle and average temperature differences of the passenger compartment, and perform curve fitting on the ratios to obtain a second coefficient.

The invention also provides a test method of the automobile oil consumption test system based on the transmissivity of the window glass, which comprises the following steps:

standing and irradiating: closing the engine and the windows of the vehicle, and enabling the vehicle to stand for a second set time under the set illumination intensity to obtain the temperature of the passenger compartments of the plurality of vehicles;

selecting a reference vehicle, obtaining a first coefficient according to passenger compartment temperature differences and window glass average transmission rate differences of a plurality of vehicles relative to the reference vehicle, and obtaining a passenger compartment average temperature difference of the vehicle according to the first coefficient, window glass areas of all positions of the vehicle and the window glass transmission rate differences, wherein the passenger compartment average temperature difference is an average value of passenger compartment temperature differences contributed by the window glasses of all the positions;

oil consumption testing stage: starting an automobile air conditioner, setting the same air conditioner parameters, controlling the vehicle to run under the specified working condition of an oil consumption test, and measuring the oil consumption of a plurality of vehicles;

and obtaining a second coefficient according to the oil consumption difference of the plurality of vehicles relative to the reference vehicle and the average temperature difference of the passenger compartment, wherein the second coefficient is the ratio of the oil consumption difference to the average temperature difference of the passenger compartment.

Further, a warm-up stage is also included before the standing irradiation stage.

And (3) a warm-up stage: the method comprises the steps of closing an automobile air conditioner, opening a window and an engine, and controlling the automobile to run at a set speed for a first set time.

Further, the method for determining the average transmittance of the window glass comprises the step of obtaining the transmittance of the window glass at each position and the area of the window glass at each position.

Further, the method for determining the first coefficient comprises the steps of obtaining the ratio of the temperature difference of the passenger compartment of the plurality of vehicles relative to the reference vehicle to the average transmittance difference of the window glass, and carrying out curve fitting on the plurality of ratios to obtain the first coefficient.

Further, the determining method of the second coefficient includes obtaining ratios of oil consumption differences of the plurality of vehicles relative to the reference vehicle and average temperature differences of the passenger compartment, and performing curve fitting on the ratios to obtain the second coefficient.

The invention has the beneficial effects that: a quantitative relationship between window glass transmission and oil consumption is determined. According to the invention, a reference vehicle is selected as a comparison standard, a quantitative relation between the average transmission rate difference of the window glass and the temperature difference of the passenger compartment is obtained in a standing irradiation stage, so that the average temperature difference of the passenger compartment is obtained, and then the quantitative relation between the average temperature difference of the passenger compartment and the oil consumption difference is obtained in an oil consumption testing stage, so that the oil consumption of a designed vehicle can be obtained by designing the window transmission rate difference, the first coefficient and the second coefficient of the vehicle, and the window glass with proper transmission rate is selected based on the design target of the oil consumption.

Drawings

Fig. 1 is a schematic structural diagram of the fuel consumption testing system of the present invention.

The components in the figures are numbered as follows: the system comprises a parameter acquisition module 100, a parameter processing module 200, a control module 300 and an execution unit 400.

Detailed Description

The following detailed description is provided to further explain the claimed embodiments of the present invention in order to make it clear for those skilled in the art to understand the claims. The scope of the invention is not limited to the following specific examples. It is intended that the scope of the invention be determined by those skilled in the art from the following detailed description, which includes claims that are directed to this invention.

As shown in fig. 1, a fuel consumption testing system for an automobile based on the transmittance of window glass includes a parameter obtaining module 100, a parameter processing module 200, a control module 300 and an execution unit 400;

the parameter acquisition module 100 is used for acquiring the temperature of the passenger compartment, oil consumption, the transmittance of the window glass at each position and the area of the window glass at each position;

the parameter processing module 200 is configured to obtain a first coefficient according to the passenger compartment temperature differences and the window glass average transmission rate differences of the plurality of vehicles relative to the reference vehicle, obtain the passenger compartment average temperature differences of the vehicle according to the first coefficient, the window glass areas of the respective positions of the vehicle, and the window glass transmission rate differences, and obtain a second coefficient according to the fuel consumption differences and the passenger compartment average temperature differences of the plurality of vehicles relative to the reference vehicle;

the control module 300 is used for controlling the vehicle to execute a standing irradiation stage, an oil consumption testing stage and an oil consumption evaluation stage;

standing and irradiating: closing the engine and the windows of the vehicle, and enabling the vehicle to stand for a second set time under the set illumination intensity to obtain the temperature of the passenger compartments of the plurality of vehicles;

oil consumption testing stage: starting an automobile air conditioner, setting the same air conditioner parameters, controlling the vehicle to run under the specified working condition of an oil consumption test, and measuring the oil consumption of a plurality of vehicles;

and (3) oil consumption evaluation stage: and obtaining the oil consumption of the designed vehicle according to the window transmittance difference, the first coefficient and the second coefficient of each position of the designed vehicle.

In this embodiment, the control module 300 is further configured to control the vehicle to perform a warm-up phase;

and (3) a warm-up stage: the method comprises the steps of closing an automobile air conditioner, opening a window and an engine, and controlling the automobile to run at a set speed for a first set time.

In this embodiment, the parameter processing module 200 is further configured to obtain the average transmittance of the window glass according to the transmittance of the window glass at each position and the area of the window glass at each position.

In this embodiment, the parameter processing module 200 is further configured to obtain the average transmittance Tts-averg of the window glass according to the following formula

Where m is the number of pieces of vehicle window glass, j is the window glass at the jth position, Tts_jIs the window glass transmittance of the jth position, S_jIs the area of the window glass at the jth position, and S is the total area of the vehicle window glass.

In this embodiment, the parameter processing module 200 is further configured to obtain ratios of temperature differences of passenger compartments of the multiple vehicles with respect to the reference vehicle and average transmittance differences of the window glasses, and perform curve fitting on the ratios to obtain the first coefficient.

In this embodiment, the parameter processing module 200 is further configured to obtain the average temperature difference Δ T of the passenger compartment according to the following formula_j

Wherein K is a first coefficient, Δ Tts_jThe window glass transmittance difference at the jth position.

In this embodiment, the parameter processing module 100 is further configured to obtain ratios of oil consumption differences of the plurality of vehicles with respect to the reference vehicle and the average temperature difference of the passenger compartment, and perform curve fitting on the ratios to obtain the second coefficient.

According to the invention, a reference vehicle is selected as a comparison standard, a quantitative relation between the average transmission rate difference of the window glass and the temperature difference of the passenger compartment is obtained in a standing irradiation stage, so that the average temperature difference of the passenger compartment is obtained, and then the quantitative relation between the average temperature difference of the passenger compartment and the oil consumption difference is obtained in an oil consumption testing stage, so that the oil consumption of a designed vehicle can be obtained by designing the window transmission rate difference, the first coefficient and the second coefficient of the vehicle, and the window glass with proper transmission rate is selected based on the design target of the oil consumption.

With reference to specific embodiments, the test method of the automobile oil consumption test system based on the transmittance of the window glass comprises the following steps:

firstly, three vehicles are selected, and the window glass of each position of the three vehicles is selected and configured, and the details are shown in table 1.

Configuration of

Front windshield glass

Rear windshield glass

Front door glass

Rear door glass

Fixed angle window

Skylight glass

1

Common green + common PVB

Pulv, 3.5mm

Pulv, 3.5mm

Pulv, 3.5mm

Pulv, 3.5mm

Ash, 4.0mm

2

Common green + common PVB

Ash, 3.5mm

Pulv, 3.5mm

Ash, 3.5mm

Ash, 3.5mm

Ash, 4.0mm

3

White glass + coated PVB

Ash, 3.5mm

Pulv, 3.5mm

Ash, 3.5mm

Ash, 3.5mm

Ash, 4.0mm

And (3) a warm-up stage: and (3) closing an automobile air conditioner, opening a window and an engine, and controlling the automobile to run at a constant speed of 90km/h for 20 min. This stage is to maintain the vehicle engine water temperature in the normal range, to adequately lubricate the entire vehicle components, and to maintain the vehicle passenger compartment temperature consistent with the ambient temperature.

Standing and irradiating: closing the engine and the window of the vehicle to ensure that the vehicle is in the set illumination intensity of 850 +/-45W/m²And standing for 30min at the ambient temperature of 30 +/-2 ℃ and the relative humidity of 50 +/-5 percent to obtain the temperature of the passenger compartment of the three vehicles. This was done to test and quantify how much the window glass transmission affects the passenger compartment temperature.

The vehicle denoted by reference numeral 1 in table 1 was selected as a reference vehicle, and the average window glass transmittances Tts-averg of the three vehicles were 70%, 63%, and 48%, respectively, according to the following formula.

Wherein j is the window glass at the j-th position, Tts_jIs the window glass transmittance of the jth position, S_jIs the area of the window glass at the jth position, and S is the total area of the vehicle window glass.

Obtaining the temperature difference Delta T of the passenger compartment of the two rest vehicles relative to the reference vehicle_iRatio K to the difference Δ Tts-averg-i in the average transmission of the window glass_iFor a plurality of ratios K_iAnd performing curve fitting to obtain a first coefficient K.

The reason why the relationship between the passenger compartment temperature difference and the window glass average transmittance difference is obtained by selecting the reference vehicle is that for a certain vehicle, the change amount of the passenger compartment temperature in the standing irradiation stage is not only related to the window glass average transmittance, but also related to the illumination intensity, the ambient temperature, the relative humidity and the total area of the window glass, so that the relationship between the passenger compartment temperature change amount and the window glass average transmittance of the certain vehicle cannot be obtained. And by selecting a reference vehicle, controlling other factors to be the same, and only if the average transmissivity of the window glass is different, establishing the relationship between the temperature difference of the passenger compartment and the average transmissivity difference of the window glass, thereby accurately quantifying the influence brought by the difference of the average transmissivity of the window glass.

Then according to the first coefficient K and the window glass area S of each position of the vehicle_jAnd window glass transmittance difference Δ Tts_jAnd obtaining the average temperature difference of the passenger compartment of the vehicle, wherein the average temperature difference of the passenger compartment is the average value of the temperature differences of the passenger compartment contributed by the window glass at each position.

Mean temperature difference DeltaT of passenger compartment_jIs composed of

Wherein K is a first coefficient, Δ Tts_jThe window glass transmittance difference at the jth position of the vehicle is the window glass transmittance difference of the jth position of the vehicle relative to the reference vehicle.

In this way, since the window glass transmittance and the area are different at each position, the passenger compartment temperature difference contributed by each position is different, and what the average value of the passenger compartment temperature difference contributed by each position is can be known through the passenger compartment average temperature difference calculation formula.

Oil consumption testing stage: starting an automobile air conditioner, setting the same air conditioner parameters, controlling the vehicle to run under the specified working condition of an oil consumption test, and measuring the oil consumption of a plurality of vehicles;

and obtaining the ratio of the oil consumption difference of the plurality of vehicles relative to the reference vehicle to the average temperature difference of the passenger compartment of the plurality of vehicles relative to the reference vehicle, and carrying out curve fitting on the plurality of ratios to obtain a second coefficient. Therefore, if the relation between the oil consumption and the average temperature difference of the passenger compartment is not accurately established by selecting the oil consumption, the absolute size of the oil consumption is related to other factors, the influence of other factors can be avoided by selecting the oil consumption difference between the designed vehicle and the reference vehicle, and the quantitative relation between the oil consumption difference and the average temperature difference of the passenger compartment can be obtained independently.

And (3) oil consumption evaluation stage: according to the window transmissivity of each position of the designed vehicle, the window transmissivity difference of each position is obtained compared with the window transmissivity of each position of the reference vehicle, then the average temperature difference of the passenger compartment is obtained by combining the window glass area of each position and a first coefficient, and the average temperature difference of the passenger compartment is multiplied by a second coefficient to obtain the difference between the fuel consumption of the designed vehicle and the fuel consumption of the reference vehicle, so that the fuel consumption of the designed vehicle can be obtained. Therefore, according to the requirement of a fuel consumption design target, the configuration and the transmissivity selection of the car window glass can be provided with guiding values.