JPH0370824A - Refueling device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for automatically determining the type of engine of an automobile based on the engine sound.

(Prior art #T) There are two types of cars: gasoline cars equipped with a Ganlin engine and diesel cars equipped with a diesel engine, and the type of engine (and therefore the type of fuel that should be refueled) differs.

For this reason, when refueling, the oil type is determined based on the dirtiness of the filler port, the smell of the oil, and the roughness of the oil type display, but there is a problem that sometimes mistakes can be made and the oil type is incorrect.

In order to solve these problems, methods have been proposed to determine the oil type by detecting electromagnetic waves caused by the discharge of the spark plugs in gasoline vehicles, or by detecting differences in vehicle body vibration between gasoline and diesel vehicles. (Unexamined Japanese Patent Publication No. 61-127
498, JP-A-61-81996).

(Problem to be solved by the invention) According to the former method, detection is possible without requiring contact with the vehicle body, but not only the electromagnetic waves emitted are weak, but also the electromagnetic waves emitted by The presence of electromagnetic waves causes detection errors, and the latter method requires the vibration detection sensor to be brought into contact with the vehicle body, making the operation cumbersome.

The present invention has been made in view of these problems, and its purpose is to identify engine types that can reliably identify the engine type without requiring the operation of bringing a sensor into contact with the vehicle body. The goal is to provide equipment.

(Example) The details of the present invention will be described below based on illustrated examples.

FIG. 1 shows an embodiment of a liquid supply device equipped with an engine discriminating device of the present invention, and reference numerals in the figure indicate the engine discriminating device that is a feature of the present invention.

FIG. 2 shows an embodiment of the engine discrimination device described above, and reference numerals 2, 3, and 4 in the figure indicate microphones as acoustic-electrical conversion means for converting engine sound into electrical signals, respectively. A plurality of such devices, three in this embodiment, are placed at positions where they can easily collect sounds from the engine of an automobile. Reference numeral 5 denotes majority decision synthesis means, which determines whether the signals output from the plurality of microphones 2, 3, 4 are different, and selects and outputs the signal on the majority side. Reference numeral 6 denotes a fast Fourier transform means as a spectrum analysis means, which performs Fourier transform on the input signal and separates it into a fundamental wave component and a harmonic component spectrum. 7 is a distributed wave extraction means C that extracts harmonic components from the spectrum, and selects only the 3rd, 4th, and 5th harmonics of the fundamental wave, which are uniquely included only in diesel cars. It is something.

8 is a determination means that detects the presence or absence of the third to fifth harmonics to determine whether a diesel vehicle is a gasoline vehicle or not, and outputs the determination result to a control device 1o, which will be described later. .

Returning to FIG. 1 again, reference numerals 10 and 11 in the figure are control devices in which the type of oil to be supplied is registered in advance, and when the nozzle switch 12 and 13 are turned on, the engine type discrimination device Compare the signal with the signal from 1, and if they match, operate the oil supply mechanism to enable oil supply, and -
If not defeated (this is configured to activate the alarm 14).

Next, the operation of the apparatus configured as described above will be explained based on the flowchart shown in FIG.

When a motor vehicle approaches the refueling device, the engine sound is converted into an electrical signal by the microphone 2.3.4. These signals are selected by the majority decision synthesis means 5 for signals related to the engine sound, and are inputted to the fast Fourier transform means 6, where they are separated into fundamental wave components and harmonic components. From these signals, only the 3rd, 4th, and 5th order harmonic components are selected by the extraction means 71 and input to the determination means 8.

As a result, as shown in Figure 4 (a), if the 3rd, 4th, or 5th harmonic component exists with respect to the fundamental wave, it is determined that it is a diesel vehicle, and if it does not exist, it is determined that it is a gasoline vehicle. control device 10.1].

In other words, in the engine sound of a diesel car, as shown in Figure 4 (a), there is one independent harmonic of the 3rd and higher harmonics, while that of a gasoline car is as shown in Figure 4 (a). As shown in b), it becomes like white noise and the harmonics cannot be identified.

Next, when the worker removes the transit nozzle 20, the nozzle switch 12 is turned on (a), and the control device 10 causes the indicator 22 (23) to return to zero (b).

At this time, the oil type signal from the engine type discrimination device M1 is
If the oil type of the removed nozzle 20 is light oil (
c), Activate the pump motor 24 to perform lubrication (
2) The light oil discharged from the pump 26 is discharged by the nozzle 20 via the flow meter 28),
At the same time, the pulse from the flow rate pulse generator 3 is transmitted to the control device j.
lOT knee t! tW and is displayed on the display 22 as the refueling amount. When the predetermined amount of oil has been supplied and the nozzle 20 is returned to its original position and the nozzle switch 12 is turned off (g), the pump motor 24 is stopped (ch).

On the other hand, if the oil type signal from the engine type discrimination device M1 is gasoline (e), the alarm 14 is activated to notify the operator that the oil type is incorrect (e), and the nozzle switch 12 is turned OFF. As soon as this happens, alarm 1 goes off.
Stop 4 (nu).

When the gasoline nozzle 21 is removed, the nozzle switch 1
3 is turned on, and as in the case of light oil, 11J is turned on.
Itll returns the display 23 to zero, confirms that the oil type signal from the engine type discrimination device 1 is Ganlin, and
The pump motor 25 is operated to perform oil supply.

As a result, gasoline discharged from the pump 27 is discharged from the nozzle 21 via the flow meter 29, and at the same time, pulses from the flow rate pulse transmitter 32 are integrated by the control device 10 and displayed as the amount of refueling on the hand display 23. be done.

Note that while one device is refueling (if another vehicle enters, a new oil type signal is transmitted from the engine discrimination device 1 to the control device 10), and if the oil type is - In this case, oil can be supplied from the other nozzle.

In addition, in this example, the power level of the third to fifth harmonics is used as a parameter for determination, or the spectral level of the intermediate region between the nth harmonic and the n+1th harmonic (the region surrounded by the dotted line in the figure) is used. It may be detected.

In addition, in this embodiment, the sound captured by the microphone is directly analyzed;
Second recording lines may be recorded cyclically on a storage medium, and if the engine sound suddenly decreases, it may be determined that the engine has stopped at a refueling point, and then the data on the storage medium may be analyzed.

(Effects of the Invention) As explained above, in the present invention, the harmonic components are extracted from the engine sound and the engine type is determined based on this, so that it is possible to detect weak electromagnetic waves and vibration detection means. Since there is no need to touch the vehicle, the engine type can be determined with high accuracy without requiring any special operations.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a refueling device to which the present invention is applied, FIG. 2 is a block diagram showing an embodiment of the present invention,
FIG. 3 is a flowchart showing the operation of the device shown in FIG. 1, and FIGS. 4(a) and 4(b) are diagrams showing an example of spectrum analysis of engine sound, respectively. 1... Engineering) Gin type determination device 2.3.4... Microphone] 2.13... Nozzle switch] 4... Alarm 22. 23... Display 24. 25... Pump motor 26.27... Pump 28.29... Flow meter 31.32... Flow rate pulse transmitter Fig. 1

Claims (1)

[Claims] an acoustic-to-electric conversion means for converting engine sound into an electrical signal; a spectrum analysis means for decomposing the signal from the means into a spectrum; a distributed wave extraction means for extracting harmonic components from the spectrum; An engine type discriminating device comprising discriminating means for discriminating.