JPH04328444A - Simulating apparatus for combustion gas - Google Patents

Abstract

PURPOSE:To test and analyze a combustion gas without actually driving a machine by controlling the flow rate of various kinds of standard gases from gas cylinders through operation a central processing unit to produce a mixed gas simulating the combustion gas. CONSTITUTION:A central processing unit CPU 16 performs operations based on the data of the concentration of a gas in each gas cylinder 1, the concentration of each gas to be tested and the total flow rate, with outputting an opening degree instruction to a first electromagnetic valve 2, thus controlling the flow rate of each gas. In consequence, gases are mixed in a mixing unit 4. The flow rate of the mixed gas is measured by a second mass flowmeter 6, compared with the flow rate calculated by the CPU 16 and corrected so as to control the total gas pressure. For this purpose, the CPU 16 to which the output of a pressure sensor 13 is input instructs the opening degree of a second electromagnetic valve 12. A predetermined amount of liquid in a tank 7 is introduced via a pump 8 and a flowmeter 9 controlled by the CPU 16 into a gas liquid mixing chamber 5, so that the mixed gas is mixed with the liquid. After the concentration of each gas is analyzed by a gas analyzer 11, the gas is sent to a reaction chamber 10.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion gas simulating apparatus for artificially generating combustion gas from an engine or the like by mixing standard gases of various components, and performing reaction tests and analysis on the generated combustion gas.

0002

[Prior Art] In order to test and analyze the reaction of engine combustion gases, two methods are used: one is to collect samples by operating an actual engine, and the other is to limit the types of gases and set the flow rate of each component gas and mix them. ing.

0003

[Problem to be solved by the invention] In the former method,
It is a tedious task of having to run the engine each time, and in the latter case, if there are many types of gas, the calculation becomes complicated, and the gas components are limited, so there is a problem that the gas may differ from the actual gas. .

[0004] An object of the present invention is to provide a combustion gas simulator that eliminates such conventional problems.

[0005]

[Means for Solving the Problems] The gist of the present invention to achieve the above object is to provide a mixing system that connects a plurality of gas cylinders storing standard gases of various components via a first electromagnetic valve and a first mass flow meter. an air/water mixing chamber connected to the mixing unit via a second mass flow meter, a water tank connected to the air/water mixing chamber via a pump and a flow meter, a reaction chamber connected to the air/water mixing chamber, and a gas analyzer, a second solenoid valve and a pressure sensor connected to the gas passage between the second mass flow meter and the air-water mixing chamber, and a third mass flow meter installed between the second solenoid valve and the bypass exhaust passage. The first and second electromagnetic valves, first, second and third mass flow meters, pressure sensor, pump, flow meter and gas analyzer are connected to a central processing unit.

[0006]

[Operation] With the above configuration, the central processing unit calculates the various standard gases in the gas cylinder, controls the flow rate, generates a simulated mixture of combustion gas, and tests combustion gas without operating an actual machine such as an engine. , making analysis possible.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is, for example, N2, CO2
, O2, SO2, NO, and other standard gases are stored in the gas cylinders. The plurality of gas cylinders 1 are connected to a mixing unit 4 via a first electromagnetic valve 2 and a first mass flow meter 3.

[0008] 5 is an air/water mixing chamber. This air/water mixing chamber 5
is connected to the mixing unit 4 through a gas passage 17, and a second solenoid valve 6 is disposed in this gas passage 17. In addition, the air-water mixing chamber 5 includes a water tank 7, a pump 8, and a flow meter 9.
Further, a reaction chamber 10 and a gas analyzer 11 are connected to the steam/water mixing chamber 5.

The mixing unit 4 and the air/water mixing chamber 5
A second solenoid valve 12 and a pressure sensor 13 are connected to the gas passage 17 connecting the two, and the second solenoid valve 12
It is connected to the bypass exhaust passage 14 via a chromometer 15.

The first and second solenoid valves 2 and 12, the first, second and third mass flow meters 3, 6 and 15, and the pressure sensor 1
3, the pump 8, the flow meter 9, and the gas analyzer 11 are connected to the central processing unit 16, and are controlled by the central processing unit 16 as appropriate.

Since the present invention is an apparatus having the above configuration, the concentration and total flow rate of each gas to be tested are set, and this data is sent to the central processing unit in advance, as shown in the data processing system explanatory diagram of FIG. has been entered.

From the data of the gas concentration in each gas cylinder 1, the concentration of each gas tested, and the total flow rate, the central processing unit 16
calculates and issues an opening instruction to the first electromagnetic valve 2, and while monitoring the flow rate signal from the first mass flow meter 3, the flow rate of each gas is controlled and mixed in the mixing unit 4.

Furthermore, the flow rate of the mixed gas that has passed through the mixing unit 4 is measured by the second mass flow meter 6, and is fed back to the central processing unit 16, where it is compared with the calculated flow rate of the central processing unit 16 and corrected. In order to control the total gas pressure, the output of the pressure sensor 13 is input to the central processing unit 16, and the second solenoid valve 12 is inputted from the central processing unit 16.
The pressure is controlled by instructing the opening of the valve.

The pressure-controlled mixed gas is introduced into the air-water mixing chamber 5. A predetermined amount of liquid from the water tank 7 is introduced into the air-water mixing chamber 5 by a pump 8 and a flow meter 9 controlled by the central processing unit 16, and the mixed gas is mixed with this liquid.

The mixed gas mixed with the liquid is analyzed by a gas analyzer 11, and the concentration of each gas is fed back to the central processing unit 16. The mixed gas thus obtained is transferred to the reaction chamber 1.
0 and perform the test.

[0016]

As described above, according to the device of the present invention, various standard gases in a gas cylinder are calculated in the central processing unit, the flow rate is controlled, a mixed gas simulated as combustion gas is generated, and this is fed into the reaction chamber. Because it is designed to be tested, combustion gas tests can be performed without operating actual equipment such as engines as in the past, and combustion gas tests can be performed under conditions equivalent to those of actual gas. It has the advantage of being

[Brief explanation of drawings]

FIG. 1 is a diagram showing the device of the present invention.

[Fig. 2] Diagram explaining the data processing system by the device of the present invention

[Explanation of symbols]

1 Gas cylinder 2 First solenoid valve 3 First mass flow meter 4 Mixing unit 5 Air water mixing chamber 6 Second mass flow meter 7 Aquarium 8 Pump 9 Flowmeter 10 Reaction chamber 11 Gas analyzer 12 Second solenoid valve 13 Pressure sensor 14 Bypass exhaust passage 15 Third mass flow meter 16 Central processing unit 17 Gas passage

Claims (1)

[Claims] 1. A mixing unit connected to a plurality of gas cylinders storing standard gases of various components through a first solenoid valve and a first mass flow meter; and an air/water mixing unit connected to the mixing unit through a second mass flow meter. a water tank connected to the air-water mixing chamber via a pump and a flow meter, a reaction chamber and a gas analyzer connected to the air-water mixing chamber, and the second mass flow meter and the air-water mixing chamber. a second solenoid valve and a pressure sensor connected to the gas passage;
a third mass flow meter installed between the second solenoid valve and the bypass exhaust passage, the first and second solenoid valves, the first, second and third mass flow meters, a pressure sensor, a pump,
A combustion gas simulator characterized in that a flow meter and a gas analyzer are connected to a central processing unit.