JPH06221971A - Air circulation method in housing for collecting vaporized sample gas - Google Patents

Abstract

PURPOSE:To provide an air circulation method in a housing for sample vaporized gas collection capable of efficiently flowing inside air conditioning circulation wind in a car in SHED and improving cooling effect. CONSTITUTION:In performing vapourized gas measuring test for testing the vapourized gas during realizing running on a chassis dynamometer 3 in a housing (SHED) 2 for sample vapourized gas collection, in a housing body 4 constituted free of sealing with a solid body, an engine cooling path L to cool engine with a fan 11 provided in the front of the car 1 is formed. Hot conditioned wind blowing paths M1, M2, M3, are formed to blow hot conditioned wind from the front lower part of the car 1 toward the lower car body after returning the wind from above the running car 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for circulating air in a housing for collecting evaporated gas of a sample, and more particularly, to measure an evaporated gas such as hydrocarbon evaporated from an automobile or its fuel. A novel evaporation gas measurement for measuring the evaporation gas while realizing traveling on a chassis dynamometer in a sample evaporation gas collection housing (hereinafter simply referred to as SHED) for accommodating and collecting the evaporation gas as a sample SHE in the test
The present invention relates to a method of circulating the air-conditioning circulating air inside D.

[0002]

2. Description of the Related Art Conventionally, in order to measure vaporized gases such as hydrocarbons vaporized from automobiles and fuels thereof, the vaporized gases are measured while running on a chassis dynamometer. SH
There was no transpiration gas measurement test by the ED method.

The present invention has been made in view of the above problems, and an object thereof is to allow the SHED to efficiently circulate the internal air-conditioning circulation air to an automobile to improve the cooling effect. To provide a method.

[0004]

In order to achieve the above object, an atmospheric circulation method in a housing for collecting sample evaporated gas according to the present invention is to measure evaporated gas such as hydrocarbon evaporated from an automobile or its fuel. In order to
The vehicle is housed in a sample evaporation gas collection housing for collecting the evaporation gas as a sample, and a rigid body is used to perform an evaporation gas measurement test to measure the evaporated gas while running on a chassis dynamometer. In the housing body configured as possible, an engine cooling flow path for cooling the engine is formed by a fan provided in front of the automobile, and after returning wind from above the running automobile, the lower front portion of the automobile The temperature-controlled air blow-out flow path for blowing the temperature-controlled air toward the lower part of the vehicle body is formed.

[0005]

According to the method for circulating the atmosphere in the housing for collecting the evaporated gas of the present invention, after the wind is returned from above the running vehicle, the temperature is controlled from the lower front portion of the vehicle toward the lower portion of the vehicle body. The air flow passage is formed to allow the temperature-controlled air to flow through the underbody of the vehicle, which can contribute to the temperature control of the fuel tank arranged in the vehicle.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited thereby. 1 and 2, the method of circulating the atmosphere in the housing for collecting sample evaporated gas is such that the vehicle 1 is housed in order to measure evaporated gas such as hydrocarbon evaporated from the vehicle 1 and its fuel. In a sample evaporation gas collection housing (SHED) 2 for collecting gas as a sample, a rigid body can be hermetically sealed when performing an evaporation gas measurement test for measuring the evaporated gas while traveling on the chassis dynamometer 3. In the configured housing body 4, an engine cooling flow path L for cooling the engine is formed by a vehicle speed proportional fan (fan) 11 provided in front of the automobile 1, and the wind is blown from above the traveling automobile 1. After returning, the temperature control air blow-out flow path is formed to blow the temperature control air from the lower front part of the automobile 1 toward the lower part of the vehicle body.

Further, the engine cooling flow passage L is constituted by a flow passage from the front of the automobile 1 to the engine arranged in the front of the automobile, while the temperature control air blowing flow passage is provided at the rear upper position of the automobile. A flow path M ₁ from A directly above to a front upper position B of the vehicle 1, a flow path M ₂ from a front upper position B of the vehicle 1 to a lower front position C, and an air conditioner 3
Through 0, it returns the wind from the front upper position B, and is composed of a channel M ₃ to be supplied to the vehicle underbody by blowing conditioned air from the front down position C of the vehicle 1.

Further, the air conditioning apparatus 30 includes an upper duct 32 having a wind inlet 31 formed in the flow path inlet in the channel M ₁ of rear upper position A of the motor vehicle 1, the front lower portion of the car 1 from the front upper position B It is mainly composed of a lower duct 33 formed on the flow path M ₂ passing through the position C and having the heat exchange fins 12. In the air conditioner 30, as shown in FIGS. 1 and 2, from the rear upper position A through the air inlet 31,
The upper duct 32 guides the fan 34 (see FIG. 3) provided in the lower duct 33, and further, the lower grill 35.
It is configured to blow out temperature-controlled air from. The cold water tank 9 is provided as a heat source for adjusting the temperature of the fuel tank in the rear part of the automobile, and the flow rate of the fin coil of the heat exchange fins 12 (see FIG. 2) connected to the cooling coil is controlled, so that The temperature control air is blown from the grill 35 to the fuel tank.

On the other hand, the temperature inside the housing body 4 is also adjusted by providing a hot water tank 8 and a cold water tank 9 as heat sources, and separating the heating coil and the cooling coil from each other. By controlling the flow rate flowing through the coil, a predetermined temperature of 40.6 ° C. can be obtained. That is, both the hot water tank 8 and the cold water tank 9 function as heat sources for adjusting the temperature of the SHED 2 and the fuel tank of the automobile 1. In short, in addition to the engine cooling flow path L, the internal air-conditioning circulation wind is generated so that the temperature-controlled wind is blown from the front lower position C of the automobile 1 to the underbody of the automobile 1 separately from the engine cooling flow passage L. By circulating cold air through the underbody of the automobile 1, the temperature control of the fuel tank can be improved.

A chiller unit 10 including a refrigerator for cold water is connected to the cold water tank 9, and both 9 and 10 are connected by a primary cold water pump 19.

Further, in this embodiment, the chassis dynamometer 3 has a roller diameter of 220 mm (φ), and the outer diameter dimension of the enclosure is about 11.5 m (W) × 4.7 m (D).
× 2.8 m (H).

The volume of the housing body 4 is about 140 to 15
The temperature is 0 m ³ and the temperature is adjusted to 40.6 ° C., and the evaporation gas measurement test is performed for about 75 minutes.

In the housing body 4, a vehicle speed proportional fan 11 is provided on the air supply side of the automobile 1 to form the above-described engine cooling flow path L for cooling the engine room when traveling in the LA-4 mode. , On the exhaust side of car 1,
A fuel tank temperature controller 13 is provided so as to match the fuel temperature history from a control pedestal (controller) 12 located outside the housing body 4. The control pedestal 12 thus functions as a command unit for processing the data for adjusting the temperature of the fuel tank, and also has the function of adjusting the temperature inside the housing body 4.

An engine intake air temperature control device 27 outside the housing body 4 is for supplying air to the automobile 1 during operation.
As the ventilation means, a ventilation fan 14 and an exhaust duct 15 are provided directly above the vehicle speed proportional fan 11. Reference numeral 16 is a power panel involved in air conditioning of the SHED 2, reference numeral 1
Reference numerals 7, 18 and 25 are a fuel temperature control pump, a hot water pump and a secondary cold water pump, reference numeral 20 is an electric heater, and reference numerals 21, 22, 23 and 24 are drain pipes.

In the interior of the housing body 4, the volume of the housing body 4 is adjusted by changing the volume of the housing body 4 by spontaneously sucking or discharging air in accordance with the atmospheric pressure in the housing body 4. A pressure absorbing bag 5 is provided. The pressure absorbing bag 5 is made of vinyl fluoride resin or the like so as to be deformable in the shape of a bag, which is connected to an air inflow / outflow means 7 provided outside the housing body 4 for inflowing / outflowing air. The air inflow / outflow means 7 communicates with the pressure absorbing bag 5 through the communication port 6 provided in the housing body 4, and the bag is inflated in the pressure absorbing bag 5 in order to determine the initial volume of the housing body 4. Air supply pump 7a and solenoid valve 7b for supplying an amount of air of about half the maximum volume at the time
And a solenoid valve 7c for allowing natural inflow or outflow of air into the pressure absorbing bag 5 in response to a difference in pressure inside and outside the housing body 4. Further, the air supply pump 7a is connected to a flow meter (not shown) that measures the amount of air sent into the housing body 4 to determine the initial volume of the housing body 4, while the solenoid valve 7c absorbs pressure. It is connected to a flow meter (not shown) that measures the amount of natural inflow of air into the bag 5 or the amount of natural outflow from the bag 5. Therefore, the volume of the pressure absorbing bag 5 can be measured and the volume of the housing body 4 can be known.

Since this embodiment has the above-mentioned structure, the temperature-controlled air is blown by the upper duct 32 from the rear of the SHED 2 (upper rear position A of the automobile 1) to the fan 3 of the lower duct 33.
Guided to the 4th entrance, blown out from the lower grill 35,
Cool air can be blown to the underbody of the car, and the temperature control of the fuel tank can be improved.

As described above, in this embodiment, after the wind is returned from above the traveling automobile 1, the temperature-controlled air blowing passage M for blowing out the temperature-controlled wind toward the lower portion of the vehicle body from the lower front portion of the automobile.
₁ , M ₂ and M ₃ are formed so that temperature-controlled air can be made to flow to the underbody of the automobile 1, which contributes to the temperature control of the fuel tank arranged in the automobile 1. it can.

[0018]

As described above, according to the present invention, the sample vaporized gas collection housing (SHED) for housing the automobile is provided.
When measuring transpiration gas while running on a chassis dynamometer, the temperature-controlled wind blows back from the upper part of the running car and blows temperature-controlled air from the lower part of the front of the car toward the lower part of the vehicle. By forming a blow-out flow path, it is possible to allow temperature-controlled air to flow through the underbody of the vehicle, and therefore, it is possible to contribute to the temperature control of the fuel tank arranged in the vehicle. There is an effect that the circulating air can be efficiently flowed to the automobile to improve the cooling effect.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an overall configuration showing an embodiment of the present invention.

FIG. 2 is a perspective view of the inside of a sample vaporized gas collection housing in the above embodiment.

FIG. 3 is an explanatory diagram of a main part configuration in the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Automotive, 2 ... SHED (housing for sample evaporation gas collection), 3 ... Chassis dynamometer, 4 ... Housing main body, 11 ... Fan, 12 ... Heat exchange fins, 30 ... Air conditioner, 31 ... Wind inlet, 32 ... Top Duct, 33 ... lower duct,
34 ... Fan of air conditioner, 35 ... Lower grill of air conditioner, M ₁ , M ₂ , M ₃ ... Temperature control air blowing flow path, L ... Engine cooling flow path.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yama ▲ saki ▼ Kazumi 1-4-1 Chuo, Wako-shi, Saitama Inside the Honda R & D Co., Ltd. (72) Inventor Kiyoshi Sakata 1-4 Chuo, Wako-shi, Saitama No. 1 Incorporated company Honda R & D Co., Ltd. (72) Inventor Hideki Ohashi 2 Higashimachi, Kichijoin Miya, Minami-ku, Kyoto City, Kyoto Prefecture Horiba Manufacturing Co., Ltd. 8th-15th Soda Industry Co., Ltd.

Claims (3)

[Claims] 1. A sample evaporation gas collection housing for accommodating an automotive vehicle and collecting said evaporation gas as a sample for measuring evaporation gas such as hydrocarbon evaporated from an automobile or its fuel. When performing a transpiration gas measurement test that measures transpiration gas while running on a chassis dynamometer, the engine is cooled by a fan installed in front of the car in a housing body that is rigidly sealed A sample that forms an engine cooling flow path and forms a temperature-controlled air flow path that blows out temperature-controlled air from the lower front part of the vehicle toward the lower part of the vehicle body after returning the wind from above the running vehicle. Atmospheric circulation in a housing for vaporized gas collection. 2. The engine cooling flow passage is constituted by a flow passage from the front of the automobile to an engine arranged in the front of the automobile, while the temperature control air blowing flow passage is provided from the upper rear position of the automobile. By passing above, further, by returning the wind from the rear upper position through the air conditioning device formed to reach from the front upper position to the front lower position of the vehicle, by blowing out temperature-controlled air from the front lower position of the vehicle. 2. The atmospheric circulation method in a housing for collecting sample vaporized gas according to claim 1, wherein the method is constituted by a flow path flowing through an underbody of an automobile. 3. An air conditioner is provided so as to pass directly above a rear upper position of the vehicle and to reach a front upper position of the vehicle and has an air inlet, and an upper duct from the front upper position to a front lower position of the vehicle. 3. The method for circulating the atmosphere in the sample evaporated gas collecting housing according to claim 2, further comprising a lower duct having a heat exchange fin formed so as to reach the above.