JPH06221970A - Device for absorbing pressure variation in housing for collecting vaporized sample gas - Google Patents

Abstract

PURPOSE:To provide a pressure variation absorption device for a housing for sample vapourized gas collection capable of easily absorbing the pressure difference between inner SHED and outer SHED by naturally making promote valume control of housing main body according to the pressure difference between inner and outer SHD with a simple constitution. CONSTITUTION:The title device is used in a vapourized gas measurement test to measure vapourized gas during realizing on a chassis dynamometer 3 in a housing 2 for sample vapourized gas collection to contain a car 1 and collect the vapourized gas as a sample to measure the vapourized gas from the car 1 or its fuel. It is placed in the housing body 4 and constituted of a bag 5 for abosorbing instantaneous pressure rise and fall variation to control the volume in the housing body 4 by the volume variation of the housing body 4 by naturally sucking or exhausting air corresponding to the pressure in the housing body 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for absorbing pressure fluctuations in a housing for collecting sample vaporized gas, and more specifically,
In order to measure the vaporized gas such as hydrocarbon that is vaporized from the automobile and its fuel, house the automobile,
In a sample evaporation gas collection housing (hereinafter simply referred to as SHED) for collecting the evaporation gas as a sample,
The present invention relates to a pressure fluctuation absorbing device used in a new transpiration gas measurement test for measuring transpiration gas while realizing traveling on a chassis dynamometer.

[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 make the volume adjustment of the housing main body naturally proceed with S due to the pressure difference inside and outside the SHED with a simple structure.
It is an object of the present invention to provide a device for absorbing pressure fluctuations in a sample vaporization gas collection housing that can easily absorb a pressure difference between HED and the outside of SHED.

[0004]

In order to achieve the above object, a device for absorbing pressure fluctuations in a sample vaporization gas collection housing according to the present invention is capable of absorbing vaporized gas such as hydrocarbon vaporized from an automobile or fuel thereof. For measurement, an automobile is housed and used in a transpiration gas measurement test to measure transpiration gas while realizing traveling on a chassis dynamometer in a sample transpiration gas collection housing for collecting the transpiration gas as a sample. A device for absorbing pressure fluctuations, which is provided inside a housing main body, and changes in volume of the housing main body due to a volume change in the housing main body caused by naturally sucking in air or discharging the air corresponding to the atmospheric pressure in the housing main body. It is characterized by comprising a bag for absorbing instantaneous fluctuation of pressure rise / fall for volume adjustment.

[0005]

According to the apparatus for absorbing pressure fluctuations of the housing for collecting evaporated gas of the present invention, since the bag for absorbing instantaneous fluctuations of pressure rise / fall is arranged inside the housing body, the housing body is collected while the evaporated gas is collected. When there is a difference in pressure between the inside and the outside, air naturally flows into or out of the absorption bag in response to the difference, thereby changing the volume of the absorption bag and adjusting the volume of the housing body. It absorbs the pressure difference.

For example, when there is a difference between the pressure inside the housing body and the pressure outside the housing body so that the inside of the housing body becomes a positive pressure, the pressure causes the absorption bag to be pressurized. As a result, the absorbent bag is pushed and the air naturally flows out from the absorbent bag, thereby changing the volume in the housing main body to absorb the pressure difference, and the inside of the housing main body and the outside of the housing main body. Equilibrate the pressure of. On the contrary, when the inside of the housing body becomes negative pressure, the atmospheric pressure outside the housing body pressurizes the absorption bag,
As a result, the air naturally flows into the inside to change the volume in the housing body to absorb the pressure difference,
Equilibrate the pressure inside and outside the housing body.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited thereby. In FIG. 1, a device for absorbing pressure fluctuations in a housing for collecting sample evaporated gas is used to measure evaporated gas such as hydrocarbon evaporated from the vehicle 1 or its fuel stored through a vehicle storage door D. 1 is housed in a sample vaporized gas collection housing (SHED) 2 for collecting the vaporized gas as a sample,
It is used in a transpiration gas measurement test for measuring transpiration gas while realizing traveling on the chassis dynamometer 3, and is provided inside the housing body 4, and air is supplied in accordance with the atmospheric pressure in the housing body 4. Bag for instantaneous pressure rise / fall instantaneous fluctuation absorption (hereinafter referred to as pressure absorption bag) 5 that adjusts the volume of the housing body 4 by the volume change in the housing body 4 due to spontaneous suction or discharge.
Mainly consists of.

Further, 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. It is connected. The air inflow / outflow means 7 communicates with the pressure absorbing bag 5 through a communication port 6 provided in the housing body 4, and the housing body 4
In order to determine the initial volume of the pressure absorbing bag 5, an air supply pump 7a and a solenoid valve 7b for supplying an amount of air about half the maximum volume when the bag is inflated, and the pressure inside and outside the housing body 4 are determined. When there is a difference, the solenoid valve 7c is configured to allow air to naturally flow into the pressure absorbing bag 5 or to naturally flow air out of the pressure absorbing bag 5 accordingly. 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 is connected.
Is connected to a flow meter (not shown) that measures the amount of natural inflow of air into the pressure absorption 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. Further, the opening of the pressure absorbing bag 5 is preferably formed as wide as possible in association with the communication port 6 in order to shorten the air outflow / inflow time.

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.

The temperature inside the housing body 4 is adjusted by providing a hot water tank 8 and a cold water tank 9 as heat sources to separate the heating coil and the cooling coil from each other. A predetermined temperature of 40.6 ° C. can be obtained by controlling the flow rate flowing to the. That is, the hot water tank 8 and the cold water tank 9
Both function as a heat source for temperature control of the SHED 2 and the fuel tank of the automobile 1. For example, the inside of the housing body 4 has an atmosphere circulation system in which the wind whose temperature is adjusted by the heat exchange fins K is blown from the front lower position A of the automobile 1 and sucked from the rear upper position B.

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.

In the housing body 4, a vehicle speed proportional fan 11 for cooling the engine room during LA-4 mode traveling is provided on the air supply side of the vehicle 1, while the housing body is provided on the exhaust side of the vehicle 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 vehicle. 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 ventilation means, a ventilation fan 14 and an exhaust fan 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, a reference numeral 20 is an electric heater, and reference numerals 21, 22, 23 and 24 are drain pipes, respectively.

Since this embodiment has the above-mentioned structure, the housing body 4 has the storage door D of the automobile 1 closed when the vaporized gas is collected, and the solenoid valve is actuated by the operation of the air supply pump 7a. Pressure absorbing bag 5 via 7b
Then, the initial volume of the housing body 4 is determined by supplying air in an amount of about half the maximum volume when the bag is inflated. Then, if the collection of the gas evaporated from the automobile 1 is continued for a predetermined time, during the collection of the evaporated gas, for example,
When there is a difference between the pressure inside the housing body 4 and the pressure outside the housing body 4 such that the pressure inside the housing body 4 becomes positive, the pressure causes the pressure absorbing bag 5 to be pressurized. As a result,
When the pressure absorbing bag 5 is pushed and air naturally flows out from the inside of the pressure absorbing bag 5, the volume inside the housing main body 4 is changed to absorb the pressure difference, and the inside of the housing main body 4 and the outside of the housing main body 4 are absorbed. The pressure can be balanced.
On the contrary, when the inside of the housing body 4 becomes negative pressure, the atmospheric pressure outside the housing body 4 pressurizes the pressure absorbing bag 5, and as a result, air naturally flows into the pressure absorbing bag 5, The volume inside the housing body 4 can be changed to absorb the pressure difference, and the pressure inside the housing body 4 and the pressure outside the housing body 4 can be balanced.

As described above, in the present embodiment, in the SHED 2 in which the automobile 1 is housed, when the vaporized gas is measured while traveling on the chassis dynamometer 3, the structure is simple and the maintenance is easy. Since the pressure absorption bag 5 is installed in the housing body 4 by adopting the bag system of natural suction and exhaust type using a bag, when the pressure inside and outside the housing body 4 becomes different, the inside of the pressure absorption bag 5 is correspondingly changed. When the air naturally flows into or out of the housing, the volume of the pressure absorbing bag 5 changes, the volume of the housing body 4 can be adjusted to absorb the pressure difference, and the air pressure between the housing body 4 and the outside of the housing body 4 can be adjusted. The difference can be easily absorbed.

[0017]

As described above, according to the present invention, the sample vaporized gas collection housing (SHED) for housing the automobile is provided.
The SHED housing body adopts a natural suction / exhaust type bag system that uses a bag because the structure is simple and maintenance is easy to perform when measuring evaporated gas while traveling on a chassis dynamometer. Since the pressure-absorbing bag is installed inside, when there is a difference in pressure between the inside and outside of the housing body, the air naturally flows into or out of the pressure-absorbing bag, and the volume of the pressure-absorbing bag changes. Then, the volume of the housing body can be adjusted to absorb the pressure difference, and as a result, the pressure difference between the housing body and the outside of the housing body can be easily absorbed with a simple configuration.

[Brief description of drawings]

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Automobile, 2 ... SHED (housing for sample evaporation gas collection), 3 ... chassis dynamometer, 4 ... housing main body, 5 ... pressure absorption bag (pressure rise / fall instantaneous fluctuation absorption bag).

 ─────────────────────────────────────────────────── ─── 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 HONDA R & D Laboratories, Inc. (72) Hideki Ohashi Inventor Hideki Ohashi 2 Higashimachi, Kichijoin Miya, Minami-ku, Kyoto-shi, Kyoto (72) Inventor Tamotsu Iwai 2-chome, Hanazono Higashimachi, Higashi-Osaka, Osaka 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. A device for absorbing pressure fluctuations used in a transpiration gas measurement test that measures transpiration gas while running on a chassis dynamometer, which is installed inside the housing body and corresponds to the atmospheric pressure inside the housing body. Pressure fluctuations in the housing for sample evaporation gas collection characterized by a bag for absorbing instantaneous fluctuations in pressure rise and fall that adjust the volume of the housing body by volume change in the housing body by spontaneously sucking in or discharging it. Equipment for absorption. 2. The apparatus for absorbing pressure fluctuations in a sample evaporation gas collection housing according to claim 1, wherein the bag for absorbing instantaneous fluctuations in pressure rise / fall is configured to be deformable with vinyl fluoride resin or the like. 3. The initial volume of the housing main body is determined in advance by the bag for absorbing instantaneous fluctuations in pressure rise / fall, which has an amount of air of about half the maximum volume when the bag is inflated. For absorbing pressure fluctuations in the housing for collecting sample transpiration gas.