JP2002071523A - System for measuring automobile exhaust gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automobile exhaust gas measuring system superior in use convenience capable of surely setting a traveling pattern. SOLUTION: In this automobile exhaust gas measuring system, an automobile 8 mounted on a chassis dynamo device 5 is allowed to travel by an automobile automatic driving device 7 according to a traveling mode, and exhaust gas G emitted at that time is collected by a fixed capacity sampling device 5, and the collected sample gas S is measured by a gas measuring device 4, and the measured result or the like is managed by an automobile exhaust gas measurement managing device 1. In this system, a signal is transferred between the automobile exhaust gas measurement managing device 1 and the automobile automatic driving device 7, and a traveling pattern stored in the automobile exhaust gas measurement managing device 1 is transferred to the automobile automatic driving device 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile exhaust gas measuring system capable of automatically (unmanned) measuring exhaust gas emitted from an automobile engine.

[0002]

BACKGROUND ART hydrocarbons contained in automobile engine exhaust gas (HC), nitrogen oxides (NO _X), carbon monoxide (C
Conventionally, as an automobile exhaust gas measuring system for measuring components such as O) and carbon dioxide (CO ₂ ), a vehicle mounted on a chassis dynamo device is driven by an automatic vehicle driving device according to a driving mode, and exhausted at that time. The exhaust gas is collected by a constant volume sampling device, and the collected sample gas is supplied to a gas measurement device equipped with a plurality of gas analyzers having different measurement principles to measure each of the components. There is a vehicle exhaust gas measurement and management device that manages the exhaust gas.

[0003]

By the way, in the above-mentioned automobile exhaust gas measuring system, as described above, it is necessary that the test object automobile be driven by the automatic driving apparatus according to the traveling pattern in the traveling mode. In this type of automobile exhaust gas measurement system, an automobile exhaust gas measurement management device that controls the entire system, such as managing measurement results, etc., is configured to exchange signals with a gas measurement device or a constant volume sampling device. , Is not configured to directly transmit and receive signals to and from the automatic vehicle driving device, and therefore, the driving patterns are stored in the control units of the vehicle exhaust gas measurement management device and the automatic vehicle driving device, respectively. It is necessary to select and set the driving pattern of the same driving mode in each device. .

However, in the above-described conventional vehicle exhaust gas measurement system, since it is necessary to individually set a traveling pattern in the control unit of the vehicle exhaust gas measurement management device and the control unit of the automatic vehicle driving device, the operation is troublesome, and in some cases, the operation is complicated. However, there is a possibility that an erroneous operation is performed, such as selecting and setting different driving patterns. Also, when creating or registering a new driving pattern, it is necessary to create or register in each of the control unit of the vehicle exhaust gas measurement management device and the automatic vehicle driving device, and this case is also troublesome. There was a good chance that mistakes would occur.

The present invention has been made in consideration of the above-mentioned matters, and an object of the present invention is to provide an automobile exhaust gas measuring system which can set a traveling pattern reliably and is excellent in usability.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention allows an automobile mounted on a chassis dynamo device to travel by an automatic vehicle driving device in accordance with a traveling mode, and determines exhaust gas discharged at that time. Sampling by a volume sampling device, measuring the sampled gas in a gas measuring device, in a vehicle exhaust gas measurement system in which the measurement results and the like are managed in a vehicle exhaust gas measurement management device, the vehicle exhaust gas measurement management device Signals can be exchanged with the automatic vehicle driving apparatus, and a traveling pattern stored in the vehicle exhaust gas measurement and management apparatus can be transferred to the automatic vehicle driving apparatus.

[0007] According to the above configuration, the traveling pattern is always stored in the vehicle exhaust gas measurement and management device, and when the traveling pattern is required for measurement, the data on the desired traveling pattern is selected by the vehicle exhaust gas measurement and management device. Is automatically converted and the data is transmitted to the automatic vehicle driving apparatus, so that the vehicle to be tested can be driven in a desired driving pattern by the automatic vehicle driving apparatus. Then, when a new traveling pattern is created, it is only necessary to register this traveling pattern only in the vehicle emission measurement management device, and it is not necessary to register it in the automatic vehicle driving device. That is, according to the present invention, the running patterns can be centrally managed, the management and selection thereof can be easily performed, and the complicated operation and erroneous operation as in the related art can be eliminated.

[0008]

Embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 schematically shows an example of the configuration of an automobile exhaust gas measurement system according to the present invention. In this figure, reference numerals 1 and 2 denote an automobile exhaust gas measurement management device (not shown) provided in a measurement room (not shown). Less than,
Measurement management device), schedule management device (hereinafter,
), Each of which is composed of a suitable computer such as a personal computer and has display units 1a and 2a for displaying various data. The measurement management device 1 and the scheduler 2 are connected by a wired LAN 3 so that data can be exchanged with each other.

[0009] Reference numerals 4, 5, 6a and 7a denote a gas measuring device and a constant volume sampling device (CV) provided in a test chamber (not shown) which is airtightly partitioned from the measurement chamber.
S), a control unit of the chassis dynamo device 6 and a control unit of the automatic vehicle driving device 7, which are connected to the measurement management device 1 via the LAN 3. In the following, the measurement room and the test room may be collectively referred to as a cell.

Reference numeral 6b denotes a chassis dynamometer provided in the test room, which is controlled by a chassis dynamometer control unit 6a. Reference numeral 7b denotes an automatic driving robot of the automatic vehicle driving device 7, which is set on the driver's seat of the vehicle 8 by an appropriate method and controlled by a signal from the automatic driving device control unit 7a.

The measurement management device 1 performs various test modes stored in a memory of the measurement management device 1 based on a command from the scheduler 2 to collect and manage measurement data. , A control signal is transmitted to the gas measuring device 4, the CVS 5, the chassis dynamo device 6, and the automatic vehicle driving device 7 via the LAN 3, and these are operated and based on signals output from these devices 4 to 7. Various calculations, for example, calculation of the concentration and amount of the component to be measured based on a signal from the gas measuring device 4, and the calculation results are stored as measurement data. In the database of the measurement management device 1, in addition to the test mode, information on the shift type of the vehicle 8 used for the test, event information indicating whether or not to use the CVS 5, and vehicle information are stored. I have.

The scheduler 2 sets and schedules exhaust gas measurement in an automobile exhaust gas measurement system, and turns on / off the power of each device in the system.
In addition to controlling off control, it also has a function of displaying analysis results and the like and a function of managing span gas concentration. FIG. 3 shows a signal flow for turning on the power in the automobile exhaust gas measuring system, and outputs a contact signal for a power source of each device or the like or issues a command to the measurement management device 1. In FIG. 3, reference numeral 21 denotes an uninterruptible power supply. FIG. 4 shows a signal flow in the test sequence. As understood from FIGS. 3 and 4, the power of each device or the like is controlled to be turned on / off or the exhaust gas measurement is set based on a command from the scheduler 2. Note that the scheduling of the exhaust gas measurement by the scheduler 2 is not related to the gist of the present invention, and thus the description thereof is omitted.

The gas measuring device 4 is equipped with a plurality of gas analyzers having different measuring principles, and detects HC, NO _x , CO contained in the engine exhaust gas G based on a command from the measurement managing device 1. , CO _{2 and the} like can be measured separately, and the measurement data is sent to the measurement management device 1.

The CVS 5 constantly samples the exhaust gas G diluted by the dilution air A with a constant volume as a sample gas S on the basis of a command from the measurement management device 1, such as a CFV 16 (see FIG. 2). A flow signal or the like measured by the measurement is transmitted to the measurement management device 1.

Further, the chassis dynamo device 6 is controlled by a command from the measurement management device 1, and its roller 6c
The drive wheels 8a of the automobile 8 to be tested are placed on the roller 6c to generate power absorption, and the output from a speed sensor or a torque sensor (not shown) provided on the roller 6c is measured and managed. Send it to device 1.

The automatic vehicle driving device 7 is connected to the measurement management device 1 by a signal via a LAN 3 and transmits data relating to a travel pattern in a travel mode (test mode) sent from the measurement management device 1. The vehicle 8 is automatically driven in a predetermined traveling mode based on the driving mode.

In FIG. 1, reference numeral 9 denotes an engine cooling fan provided in front of the automobile 8. Reference numeral 10 denotes a large display panel, which is provided in a test room so that it can be seen from the measurement room. You.

In FIG. 1, reference numeral 11 denotes a personal computer for setting a span gas concentration.
And the scheduler 2. Also, 12
Reference numerals a, 12b, 12c,... denote supplementary facilities provided in the test room. In this embodiment, air conditioning facilities, alarms, and fire extinguishing facilities are exemplified. These facilities 1
Are controlled or managed by the scheduler 2.

FIG. 2 schematically shows an example of the configuration of a main hardware portion in the automobile exhaust gas measurement system. In this figure, reference numeral 8b denotes an engine of the automobile 8;
Is an exhaust pipe connected to the engine 8b. 13 is an exhaust pipe 8
c, the downstream of which is CVS
5 pipes 5a are connected. On the upstream side of the pipe 5a, a dilution air supply path 15 having a dilution air purifier (DAR) 14 is connected, and the exhaust gas G from the engine 8b is appropriately diluted by the dilution air A. Further, the pipe 5a is provided with a critical flow venturi (CFV) 16 and a suction blower 17 on the downstream side thereof, and a sampling for sampling the exhaust gas G diluted slightly upstream of the CFV 16 as a sample gas S. A gas sampling pipe 18 provided with a section 18a is connected, and is configured to sample gas S at a constant volume. Reference numeral 19 denotes an atmosphere bypass port provided in the dilution air supply path 15, and reference numeral 20 denotes an on-off valve thereof.

In the automobile exhaust gas measurement system having the above-described configuration, when exhaust gas is measured, as shown in FIG. 3, a power-on command is issued from the scheduler 2 to each device or device in the system. Then, the scheduler 2 issues a command to the measurement management device 1 to specify a traveling pattern in the traveling mode. The measurement management device 1 selects a predetermined travel pattern from a plurality of travel patterns stored in the measurement management device 1 according to the command, and automatically converts the selected travel pattern into a format common to the automatic vehicle driving device 7. After that, the traveling pattern is transferred to the automatic vehicle driving device 7. As a result, the measurement management device 1 and the automatic vehicle driving device 7 share the same traveling pattern, and the automatic vehicle driving device 7 causes the vehicle 8 to be tested to travel according to the traveling pattern, and the predetermined exhaust gas measurement is performed. Done.

When a new driving pattern is created, it is only necessary to input the created new driving pattern into the memory of the measurement management device 1. No need to enter. Also,
Even when an existing running pattern is corrected or changed, a predetermined correction or the like may be performed on the running pattern stored in the memory of the measurement management device 1.

As will be understood from the above description, in the automobile exhaust gas measuring system of the present invention, the running pattern can be centrally managed, the management and selection thereof can be easily performed, and the complicated operation of the conventional system can be achieved. Operation errors can be eliminated.

In the above-described embodiment, the LAN 3 is a wired system, but may be a wireless system.

[0024]

As described above, according to the present invention, the running pattern can be centrally managed, and only the running pattern in the measurement management device needs to be selected. Such operation complexity and operation error can be eliminated. Therefore, the running pattern can be set reliably, and an automobile exhaust gas measuring system excellent in usability can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing an example of a configuration of an automobile exhaust gas measurement system of the present invention.

FIG. 2 is a diagram schematically showing an example of a configuration of a main hardware part in the measurement system.

FIG. 3 is a diagram showing an example of a signal flow regarding power-on in the measurement system.

FIG. 4 is a diagram showing an example of a signal flow relating to a test sequence in the measurement system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vehicle exhaust gas measurement management device, 2 ... Schedule management device, 4 ... Gas measurement device, 5 ... Constant volume sampling device, 6 ... Chassis dynamo device, 7 ... Automobile driving device, 8 ... Automobile, G ... Exhaust gas, S ... Sample gas.

Claims (1)

[Claims] 1. A vehicle mounted on a chassis dynamo device is driven by an automatic vehicle driving device according to a driving mode, and exhaust gas discharged at that time is collected by a constant volume sampling device. In an automobile exhaust gas measurement system in which a measurement result is measured by a measurement device and the measurement result or the like is managed by an automobile exhaust gas measurement management device, signals can be transmitted and received between the automobile exhaust gas measurement management device and the automatic vehicle driving device. Wherein the running pattern stored in the vehicle exhaust gas measurement and management device can be transferred to an automatic vehicle driving device.