JP2964374B2 - Apparatus for absorbing pressure fluctuations of the housing for collecting sample evaporation gas - Google Patents

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 vaporized gas from a sample, and more particularly, to an apparatus for absorbing pressure fluctuations.
In order to measure the vaporized gas such as hydrocarbons transpired from the car or its fuel, house the car,
In a sample vaporized gas collection housing (hereinafter simply referred to as SHED) for collecting the vaporized gas as a sample,
The present invention relates to a device for absorbing pressure fluctuation used in a new evaporative gas measurement test for measuring evaporative gas while realizing traveling on a chassis dynamometer.

[0002]

2. Description of the Related Art Conventionally, in order to measure vaporized gas such as hydrocarbons vaporized from an automobile or its fuel, etc., the vaporized gas is measured while realizing traveling on a chassis dynamometer. SH
There was no evaporative gas measurement test by the ED method.

The present invention has been made in view of the above-mentioned problems, and has as its object a simple configuration in which the volume of the housing body is naturally adjusted in accordance with the atmospheric pressure difference between the inside and outside of the SHED to achieve the S
An object of the present invention is to provide an apparatus for absorbing pressure fluctuation of a housing for collecting vaporized sample gas, which can easily absorb a pressure difference between the HED and the outside of the SHED.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, a device for absorbing pressure fluctuations of a sample vaporized gas collecting housing according to the present invention is capable of removing vaporized gas such as hydrocarbons vaporized from an automobile or its fuel. For measurement, a car is stored, and used in a vaporized gas measurement test for measuring vaporized gas while running on a chassis dynamometer in a sample vaporized gas collection housing for collecting the vaporized gas as a sample. A pressure fluctuation absorbing device, which is provided inside the housing main body, and in accordance with the atmospheric pressure in the housing main body, the volume of the housing main body changes due to a volume change in the housing main body by naturally inhaling or discharging air. Ri volume bag fluctuation absorbing momentary pressure rise and fall make adjustments Tona, fluctuation absorbing the pressure rise and fall momentarily
Bag is about half of the maximum volume when the bag is inflated in advance
The initial volume of the housing body is determined
It is characterized by having been done.

[0005]

The apparatus for absorbing pressure fluctuations of the sample vaporized gas collecting housing according to the present invention has a pressure rise / fall instantaneous fluctuation absorbing bag disposed inside the housing main body. When the pressure difference between the inside and the outside occurs, the air naturally flows into or out of the absorbing bag correspondingly, and the volume of the absorbing bag changes, thereby adjusting the volume of the housing body. It absorbs pressure differences.

[0006] For example, when a difference in pressure inside the housing main body becomes positive pressure between the air pressure inside the housing main body and the air pressure outside the housing main body, the pressure presses the absorption bag. As a result, the absorption bag is pushed and air naturally flows out of the absorption bag, thereby changing the volume in the housing body to absorb the pressure difference, and allowing the inside of the housing body and the outside of the housing body to be absorbed. Equilibrate pressure. Conversely, when the inside of the housing body becomes a negative pressure, the atmospheric pressure outside the housing body comes to pressurize the absorbing bag,
As a result, the air naturally flows into the inside, thereby changing the volume in the housing body and absorbing the pressure difference,
The pressure inside the housing body and the pressure outside the housing body are balanced.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the present invention is not limited thereby. In FIG. 1, a device for absorbing pressure fluctuations of a sample vaporized gas collecting housing is used to measure vaporized gas such as hydrocarbons vaporized from a vehicle 1 or fuel thereof stored in a vehicle storage door D. 1 is housed in a sample vaporized gas collecting 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 main body 4. A pressure rise / fall instantaneous fluctuation absorbing bag (hereinafter, referred to as a pressure absorbing bag) 5 for adjusting the volume of the housing main body 4 by changing the volume in the housing main body 4 by naturally inhaling or discharging the same.
Mainly from.

Further, the pressure absorbing bag 5 is formed into a deformable bag-like shape with a vinyl fluoride resin or the like, which is provided to an air inflow / outflow means 7 provided outside the housing body 4 for inflowing / outflow of 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.
In order to determine the initial volume of the air, the air supply pump 7a and the solenoid valve 7b for supplying the pressure absorbing bag 5 with air of about half the maximum volume when the bag is inflated, and the pressure inside and outside the housing body 4 When the difference occurs, the solenoid valve 7c is configured to allow air to flow naturally into the pressure absorbing bag 5 or to flow air naturally from 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 main body 4 in order to determine the initial volume of the housing main body 4, while the electromagnetic valve 7c
Is connected to a flow meter (not shown) that measures the natural inflow of air into the pressure absorption bag 5 or the natural outflow from the bag 5. Therefore, the amount of change in the volume of the pressure absorbing bag 5 can be measured, and the volume of the housing body 4 can be determined. The opening of the pressure absorbing bag 5 is preferably formed as wide as possible in connection with the communication port 6 in order to shorten the air outflow / inflow time.

In this embodiment, the chassis dynamometer 3 has a roller diameter of 220 mm (φ), and the outer diameter 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
0 m ³ , temperature-controlled to 40.6 ° C., and transpiration 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 a heating coil and a cooling coil. The predetermined flow rate of 40.6 ° C. can be obtained by controlling the flow rate flowing through the heater. That is, hot water tank 8, cold water tank 9
Both functions as a heat source for temperature control of the SHED 2 and the fuel tank of the vehicle 1. For example, the inside of the housing body 4 has an air circulation system in which wind whose temperature is adjusted by the heat exchange fins K blows out from a lower front position A of the automobile 1 and is sucked from a rear upper position B.

A chiller unit 10 including a refrigerator for chilled water is connected to the chilled water tank 9.
Both are communicated by a primary chilled water pump 19.

In the housing body 4, a vehicle speed proportional fan 11 for cooling the engine room during the LA-4 mode running 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 stand (controller) 12 located outside the fuel tank 4. The control base 12 functions as a command unit for processing data for controlling the temperature of the fuel tank, and also has a function of adjusting the temperature inside the housing body 4.

The 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 immediately above the vehicle speed proportional fan 11. Reference numeral 16 denotes a power panel involved in air conditioning of the SHED2, and reference numeral 1 denotes a power panel.
Reference numerals 7, 18 and 25 denote a fuel temperature control pump, a hot water pump and a secondary chilled water pump, respectively, reference numeral 20 denotes an electric heater, and reference numerals 21, 22, 23 and 24 denote drain pipes, respectively.

In this embodiment, since the housing main body 4 has the above structure, the housing door D of the automobile 1 is closed when the vaporized gas is collected, and the solenoid valve is operated by the operation of the air supply pump 7a. 7b through the pressure absorbing bag 5
Then, the initial volume of the housing main body 4 is determined by supplying about half of the maximum volume of air when the bag is inflated. When 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 a pressure difference between the inside of the housing body 4 and the outside of the housing body 4 becomes positive in the housing body 4, the pressure presses the pressure absorbing bag 5. As a result,
When the pressure absorbing bag 5 is pushed and air naturally flows out of the pressure absorbing bag 5, the volume inside the housing body 4 is changed to absorb the pressure difference, and the pressure difference between the housing body 4 and the outside of the housing body 4 is reduced. The pressure can be balanced.
Conversely, when the inside of the housing main body 4 becomes negative pressure, the atmospheric pressure outside the housing main body 4 pressurizes the pressure absorbing bag 5, and as a result, air naturally flows into the pressure absorbing bag 5, The pressure inside the housing body 4 can be absorbed by changing the volume inside the housing body 4 to balance the pressure difference between the inside of the housing body 4 and the outside of the housing body 4.

As described above, in this embodiment, when measuring the vaporized gas while realizing traveling on the chassis dynamometer 3 in the SHED 2 in which the car 1 is stored, from the viewpoint of a simple structure and easy maintenance, Since the pressure absorbing bag 5 is mounted inside the housing main body 4 by adopting a natural air suction / exhaust type bag system using a bag, if a difference occurs in the pressure inside and outside the housing main body 4, the pressure absorbing bag 5 corresponding to the difference is generated. 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 and the pressure difference can be absorbed, and the air pressure between the housing body 4 and the outside of the housing body 4 can be reduced. The difference can be easily absorbed.

[0017]

As described above, according to the present invention, a sample vaporized gas collecting housing (SHED) in which an automobile is stored is provided.
In measuring the vaporized gas while running on a chassis dynamometer, the SHED housing body adopts a natural air suction and exhaust type bag method using a bag from the viewpoint of simple structure and easy maintenance. When the pressure inside and outside the housing body is different, the air naturally flows into or out of the pressure absorbing bag, which changes the volume of the pressure absorbing bag. As a result, the pressure difference can be absorbed by adjusting the volume of the housing main body, and as a result, there is an effect that the pressure difference between the housing main body and the outside of the housing main body can be easily absorbed with a simple configuration. Also a car
The transpiration gas measurement test performed while realizing
The volume in SHED and the
The pressure changes sharply, but instantaneous fluctuations in pressure
Set the initial state of the collection bag to about half of its maximum capacity.
In a state where the
Even a slight change can be easily followed.

[Brief description of the drawings]

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Automobile, 2 ... SHED (housing for collecting vaporized sample gas), 3 ... Chassis dynamometer, 4 ... Housing body, 5 ... Pressure absorption bag (bag for instantaneous fluctuation of pressure rise / fall).

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yamazaki Saki ▼ 1-4-1 Chuo, Wako-shi, Saitama Pref. Honda R & D Co., Ltd. (72) Inventor Kiyoshi Sakata 1-4-4 Chuo, Wako-shi, Saitama No. 1 Inside Honda R & D Co., Ltd. (72) Inventor Hideki Ohashi 2nd Higashi-cho, Kichijoin-gu, Minami-ku, Kyoto, Kyoto Prefecture Inside Horiba Seisakusho Co., Ltd. No. 15 Soda Kogyo Co., Ltd. (56) References JP-A-4-369456 (JP, A) JP-A-4-331348 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01N 1/22

Claims (2)

(57) [Claims] 1. A sample evaporative gas collection housing for housing an automobile and collecting the evaporative gas as a sample, for measuring evaporative gas such as hydrocarbons evaporating from an automobile or its fuel. A pressure fluctuation absorbing device used in a vaporized gas measurement test that measures vaporized gas while realizing traveling on a chassis dynamometer, provided inside a housing main body, and air corresponding to the air pressure in the housing main body. naturally inhalation or Ri pressure rise and fall instantaneously fluctuation absorbing bag Tona performing volume adjustment of the housing body in a change in the volume of the housing body due to the discharge, fluctuation absorbing the pressure rise and fall moment
Bag is about half of the maximum volume when the bag is inflated in advance
The initial volume of the housing body is determined
That the pressure fluctuation damping device of the sample vaporized gas collection housing, characterized in that. 2. The apparatus for absorbing pressure fluctuations of a sample vaporized gas collecting housing according to claim 1, wherein the pressure rising / falling instant fluctuation absorption bag is made of a deformable vinyl resin or the like.