JPH1164171A - Analyzing device of driving property of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an analyzing device of driving properties of a vehicle which can analyze and display the driving properties of a vehicle in the compartment of the vehicle during driving. SOLUTION: This analyzing device 2 of driving property of a vehicle carried out data sampling and analysis and display while respective parts of the apparatus being controlled by a center control part 10. The device 2 of analyzing driving property of a vehicle is mounted on a vehicle and carries out sampling various kinds of data from the vehicle ECU 4 and outside sensors 6 from the time when a start button of an operational part 30 is pushed during to the time when a finish button is pushed and stores the sampling data in a sampling data memory part 18. After that, a data analyzing program of a data analyzing program part 22 read out and driving property is analyzed by using the various kinds of the data stored in the sampling data memory part 18. The obtained values of the driving property are transmitted to a property value display device 26 through a property value-signal converting part 24 and displayed on the display device 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle running characteristic analyzing apparatus mounted on a vehicle such as an automobile for analyzing the running characteristics of the vehicle.

[0002]

2. Description of the Related Art In vehicles such as automobiles, electronically controlled parts by an ECU (Electronic Control Unit) have been increasing in recent years. For example, engine control EC
U, brake control ECU, transmission control EC
U and the like. Accordingly, these various ECUs
There has been developed a vehicle failure diagnosis apparatus for diagnosing vehicle failure / abnormality from data of various sensors and the like obtained from the vehicle. Such a vehicle failure diagnosis device is disclosed in, for example,
There is an apparatus described in Japanese Patent No. 161037. In the device described in this publication, the engine control EC described above is used.
U, brake control ECU, transmission control EC
Various ECUs such as U are connected to one data bus, and a diagnostic computer is connected to this data bus. Thus, a comprehensive diagnosis of a plurality of control targets controlled by various ECUs can be performed.

[0003]

However, in the above-mentioned prior art, only the failure of each part of the vehicle is diagnosed, and the fuel consumption of the vehicle, average vehicle speed, vehicle speed frequency, engine load, vehicle interior noise, vehicle exterior noise, etc. It was not possible to analyze running characteristics such as body vibration. If the running characteristics of the vehicle can be analyzed and displayed during the running of the vehicle, the running characteristics of the vehicle can be felt by the user of the vehicle as data, which can be useful for sales promotion. In view of the above, it is an object of the invention according to claims 1 and 2 of the present application to provide a vehicle running characteristic analyzing apparatus capable of analyzing and displaying running characteristics of a vehicle in a vehicle while the vehicle is running. . It is another object of the present invention to provide a vehicle running characteristic analyzing apparatus capable of analyzing the running characteristics of a vehicle in more detail and providing a technical explanation.

[0004]

According to a first aspect of the present invention, there is provided an apparatus mounted on a vehicle for analyzing running characteristics of the vehicle. A connection unit connected to an ECU and / or an external sensor; a data sampling unit for sampling various data from the ECU and / or the external sensor during traveling of the vehicle via the connection unit; Sampling data storage means for storing the various data sampled by the above, traveling characteristic analysis means for analyzing the traveling characteristics of the vehicle using the various data stored in the sampling data storage means, and the traveling characteristic analysis means And an analysis result display means for displaying an analysis result by the vehicle.

[0005] The vehicle running characteristic analyzing apparatus is mounted on a vehicle and connected to a vehicle ECU or an external sensor or both by connecting means. Various data from the ECU or an external sensor while the vehicle is running are sampled by the data sampling means via the connection means, and the sampled various data is stored in the sampling data storage means. The running characteristics of the vehicle are analyzed by the running characteristics analysis means using the stored various data. Then, the analysis result by the traveling characteristic analysis means is displayed on the analysis result display means.

As described above, in the vehicle running characteristic analyzing apparatus according to the present invention, various types of data from the ECU or external sensors during running of the vehicle are used to determine fuel consumption, average vehicle speed, vehicle interior noise, vehicle exterior noise, vehicle body vibration, and the like. The running characteristics are analyzed,
The analysis result can be immediately displayed and viewed. As a result, the user of the vehicle can feel the driving characteristics in terms of data, which can be useful for promoting the sales of the vehicle. Thus, in the present invention,
There is provided a vehicle traveling characteristic analysis device capable of analyzing and displaying traveling characteristics of a vehicle in a vehicle while the vehicle is traveling.

According to a second aspect of the present invention, there is provided the vehicle running characteristic analyzing apparatus according to the first aspect, wherein the various data stored in the sampling data storage means is analyzed by an external computer. An external computer connection means for connecting the vehicle running characteristic analysis device to the external computer has been added to create a vehicle running characteristic analysis device.

In this vehicle running characteristic analyzing apparatus, after analyzing and displaying running characteristics such as fuel efficiency, average vehicle speed, in-vehicle noise, out-of-vehicle noise, and vehicle body vibration during running of the vehicle, the vehicle running characteristic analyzing apparatus is used to analyze the running characteristics of the vehicle. And connected to the external computer by the external computer connection means. The external computer analyzes the various data stored in the sampling data storage unit in more detail. As a result of this analysis, changes over time in vehicle speed, engine speed, engine negative pressure, vehicle interior noise, vehicle body vibration, etc., are displayed as a graph, vehicle speed frequency, engine load, etc. are calculated and displayed as a graph, and acceleration, reduction, and the like. The speed can be calculated and displayed. As a result, a more detailed technical description of the running characteristics of the vehicle can be given to the user. In this way, the vehicle running characteristic analysis device of the present invention can analyze the running characteristics of the vehicle in more detail and provide the technical description.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. First, the overall configuration of the vehicle running characteristic analysis device of the present embodiment and the connection with an external device will be described with reference to FIG. FIG. 1 is a block diagram showing the connection between the overall configuration of the vehicle running characteristic analysis device of the present embodiment and an external device. As shown in FIG. 1, the vehicle running characteristic analysis device 2 of the present embodiment is mainly configured by a central control unit 10 having a CPU (central processing unit) and a RAM (random access memory). The next diagnostic communication unit 12 connected to the central control unit 10 is for taking in various data from the vehicle ECU 4 of the vehicle to be subjected to the running characteristic analysis.
It is called the next diagnosis communication unit because it has specifications that conform to the international standards of the next diagnosis system.
The vehicle ECU 4 is connected to the next diagnostic communication unit 12 via the ECU cable 4a.

An external sensor 6 such as a noise sensor and a vibration sensor installed in the vehicle is connected to a signal conditioner section 14 of the vehicle running characteristic analyzer 2 by a sensor cable 6a. These in-vehicle sensors are installed at several places in the vehicle. As the external sensor 6, a noise sensor, a vibration sensor, or the like may be installed near a traveling path outside the vehicle. Data from the outside sensor is input to the signal conditioner unit 14 by wireless communication. The signal conditioner unit 14 is a signal conversion unit that converts an input signal such as a current value and a frequency from the external sensor 6 into a voltage signal. This voltage signal is converted into a digital signal in the analog / digital conversion section 16 and the central control section 1
Sent to 0.

The sampling data storage unit 18 stores the vehicle E
A RAM that stores various data input from the CU 4 and the external sensor 6. The sampling program unit 20 stores a sampling program for sampling these various data. Central control unit 10
Reads out this sampling program from the sampling program unit 20, samples various data input from the vehicle ECU 4 and the external sensor 6 at a sampling interval set by the operation unit 30 described later, and stores the data in the sampling data storage unit 18. Remember. The data analysis program unit 22 includes a sampling data storage unit 18
And a data analysis program for analyzing various data stored in the. The central control unit 10 reads out the data analysis program from the data analysis program unit 22 and analyzes the running characteristics using various data stored in the sampling data storage unit 18. The obtained values of the running characteristics are output to the characteristic value signal converter 24, where they are converted into electric signals, and the values of the running characteristics are displayed on the characteristic value display 26.

The operation unit 30 is a unit for setting a data sampling interval, instructing start and end of sampling, and for inputting parameters such as the number of engine cylinders and fuel injection amount, which are premised on data analysis. . Data such as the value of the sampling interval, the start / end signal, the number of engine cylinders, and the like input from the operation unit 30 are transmitted to the operation unit signal conversion unit 28, where they are converted into digital signals and input to the central control unit 10. You. Further, the vehicle running characteristic analysis device 2 includes a personal computer interface unit 32 for connecting the central control unit 10 to an external personal computer 8. The external personal computer 8 is connected to the personal computer interface 32 by a personal computer cable 8a. When the vehicle running characteristic analysis device 2 is mounted on the vehicle to perform the running characteristic analysis, the personal computer cable 8a is naturally disconnected.

Therefore, the ECU cable 4a, the sensor cable 6a, the next diagnostic communication unit 12, the signal conditioner unit 14, and the analog / digital conversion unit 16 correspond to connection means in the present invention. Central control unit 1
0 and the sampling program unit 20 correspond to data sampling means in the present invention. Further, the sampling data storage unit 18 corresponds to a sampling data storage unit in the present invention, and the central control unit 10 and the data analysis program unit 22 correspond to a running characteristic analysis unit in the present invention. Further, the characteristic value display 26 corresponds to an analysis result display unit in the present invention. Further, the personal computer 8 corresponds to an external computer in the present invention, and includes a personal computer cable 8a and a personal computer interface unit 32.
Corresponds to the external computer connection means in the present invention.

Next, the operation unit 3 of the vehicle running characteristic analysis device 2
The structure of 0 will be described with reference to FIG. FIG.
It is a perspective view showing the appearance of the operation part of the vehicle running characteristic analysis device of this embodiment. As shown in FIG. 2, a start button 40, an end button 42, an engine cylinder number display section 44, and an injector fuel injection amount display section 46 are provided on a front panel of the operation section 30. The start button 40 is a button for starting data sampling. By pressing the start button 40, the central control unit 10 reads the sampling program from the sampling program unit 20, samples various data input from the vehicle ECU 4 and the external sensor 6, and stores the sampled data in the sampling data storage unit 18.

The end button 42 is a button for ending data sampling and starting analysis. By pressing the end button 42, the data sampling is stopped, and at the same time, the central control unit 10 reads the data analysis program from the data analysis program unit 22,
The running characteristics are analyzed using various data stored in the sampling data storage unit 18. And start button 4
The running characteristics of the vehicle from pressing 0 to pressing the end button 42 are calculated and displayed on the characteristic value display 26 of FIG.

The engine cylinder number display unit 44 and the injector fuel injection amount display unit 46 display what values have been input as the engine cylinder number and the injector fuel injection amount, which are prerequisites for calculating the fuel efficiency and the like. Things. Input of these parameters is performed by connecting a ten-key (not shown) to the operation unit 30 and inputting two-digit numbers. In the example shown in FIG. 2, the engine is a four-cylinder engine, and the injector fuel injection amount is 5 ml / s.
It has become. The value of the data sampling interval is also set using a ten-key (not shown).

Next, an example of data stored in the sampling data storage unit 18 of the vehicle running characteristic analysis device 2 will be described with reference to FIG. FIG. 3 is a diagram illustrating an example of the contents of the sampling data storage unit of the vehicle running characteristic analysis device according to the present embodiment. As shown in FIG. 3, in this example, three types of data of the vehicle speed value, the engine speed, and the fuel injection time per injection are sampled from the vehicle ECU 4 and stored in the sampling data storage unit 18. . In the first sampling performed for the first time after the start button 40 of the operation unit 30 was pressed, the vehicle speed value 1
Data of 44 km / h, engine speed of 3600 rpm, and fuel injection time of 10 ms are obtained and stored. In the second sampling performed at fixed time intervals, the vehicle speed value was 123 km / h and the engine speed was 2
Data of 800 rpm and fuel injection time of 7 ms are obtained and stored. In this manner, sampling is performed n times at regular time intervals until the end button 42 of the operation unit 30 is pressed.

Next, as a specific example of calculating the running characteristics of a vehicle, a method of calculating fuel consumption will be described with reference to the data shown in FIGS. The data sampling interval is 1
Seconds. First, the fuel efficiency is calculated for each sampling interval (hereinafter referred to as “instantaneous fuel efficiency”), and the average value of the instantaneous fuel efficiency from when the start button 40 is pressed to when the end button 42 is pressed is calculated. It is done by taking.

First, a method of calculating the fuel consumption for one second from the first sampling to the second sampling will be described. In the case of a four-cycle engine, the fuel is injected once for every two revolutions of the engine, so the calculation formula of the fuel consumption is as shown in the following formula (1). Fuel consumption = fuel injection time (second) × fuel injection amount / second × cylinder number × engine speed × 1/2 (1) Therefore, when the data in FIGS. 2 and 3 are substituted into the equation (1), the fuel Consumption = 10 ms × 5 ml / s × 4 cylinders × 60 revolutions × 1/2 = 6 ml On the other hand, the traveling distance of the vehicle during this one second is 144 km ÷ 360 because the vehicle speed value is 144 km / h from FIG.
0 = 40 m. Therefore, the instantaneous fuel consumption from the first sampling to the second sampling is 40 m ÷ 6 m
1 = about 7 km / l.

In the same manner, the instantaneous fuel consumption from the second sampling to the third sampling,..., The instantaneous fuel consumption from the (n-1) th sampling to the nth sampling are calculated. The average of these n-1 instantaneous fuel consumption values is referred to as the fuel consumption from the time the start button 40 is pressed to the time the end button 42 is pressed (hereinafter referred to as "section fuel consumption"). 1 characteristic value display 26
Will be displayed.

The procedure of the above-described section fuel consumption analysis will be described with reference to the flowchart of FIG. FIG. 4 is a flowchart illustrating a procedure of analyzing the section fuel consumption as an example of the traveling characteristics. When the procedure is started in step S10, the operator first inputs the number of engine cylinders and the value of the injector fuel injection amount to the operation unit 30 using the numeric keys as described above before the vehicle starts running (step S12).
Subsequently, in step S14, the start button 4 of the operation unit 30
It is determined whether 0 has been pressed. If the start button 40 has not been pressed, the apparatus enters a standby state until the start button 40 is pressed.
When the start button 40 is pressed, the process proceeds to step S16,
The values of the number of engine cylinders and the injector fuel injection amount are read from the operation unit 30 via the operation unit signal conversion unit 28,
It is stored in the RAM of the central control unit 10.

Next, the central control unit 10 communicates with the vehicle ECU 4 via the next diagnosis communication unit 12 to sample data of the vehicle speed value, the engine speed, and the fuel injection time, and stores them in the sampling data storage unit 18. (Step S18). Subsequently, in step S20, the operation unit 30
It is determined whether the end button 42 has been pressed. If the end button 42 has not been pressed, step S18
Then, the next data sampling is performed. When the end button 42 is pressed, the process proceeds to step S22, where each instantaneous fuel consumption is calculated according to the above-described formula using the data of the number of engine cylinders, the amount of fuel injected by the injector, the vehicle speed, the engine speed, and the fuel injection time. I do. Then, the average value of the instantaneous fuel efficiency is calculated to calculate the interval fuel efficiency (step S24), and the obtained value of the interval fuel efficiency is displayed on the characteristic value display 26 (step S26). Thus, the analysis of the section fuel consumption is completed (step S28).

In addition to the section fuel consumption, the vehicle running characteristic analyzer 2 of the present embodiment analyzes running characteristics such as average vehicle speed, running distance, in-vehicle noise, and vehicle body vibration, and displays them on a characteristic value display 26. You. The average vehicle speed is calculated based on the vehicle speed value stored in the sampling data storage unit 18 using the start button 4.
It is calculated by taking an average value from when 0 is pressed until the end button 42 is pressed. As for the vehicle interior noise, the central control unit 10 takes in the measured value of the vehicle interior noise sensor of the external sensors 6 and stores it in the sampling data storage unit 18. Then, the average value between when the start button 40 is pressed and when the end button 42 is pressed is calculated and displayed on the characteristic value display 26. Similarly for body vibration,
The central control unit 10 takes in the measured value of the in-vehicle vibration sensor among the external sensors 6 and stores it in the sampling data storage unit 18. Then, the average value between when the start button 40 is pressed and when the end button 42 is pressed is calculated and displayed on the characteristic value display 26.

Next, FIGS. 5 to 7 show examples in which the vehicle running characteristic analysis device 2 of the present embodiment is taken down from the vehicle after data sampling and connected to an external personal computer 8 for more detailed running characteristic analysis. This will be described with reference to FIG. FIG.
5 is a graph in which the vehicle running characteristic analysis device 2 of the present embodiment is connected to an external personal computer 8 and the change over time in vehicle speed is displayed on a display. In this example, the vehicle starts running at time a and the start button 4
0 is pressed. Then, the vehicle temporarily stops at time b, starts running again from time c, stops at time d, and the end button 42 of the operation unit 30 is pressed.

Therefore, in this example, the section fuel consumption displayed on the characteristic value display 26 is from the time a to the time d, and is in the idling state from the time b to the time c. The fuel efficiency is lower than when the vehicle runs continuously until time d. However, by calculating and displaying the fuel efficiency in each section from the time a to the time b and from the time c to the time d on the personal computer 8, it is possible to explain to the user that the fuel efficiency in the continuous running is better.
Further, in this example, the average vehicle speed of each section is also calculated and displayed. A more detailed technical explanation can be given to the user using these graphs and the calculated data.

FIG. 6 shows various kinds of raw data sampled by the vehicle running characteristic analyzing apparatus 2 of the present embodiment on a display of the personal computer 8. 6 (A) shows the change over time in the same vehicle speed as in FIG. 5, FIG. 6 (B) shows the change over time in the engine speed, and FIG. 6 (C) shows the change over time in the engine negative pressure (intake manifold absolute pressure). It is. These raw data are transmitted to the personal computer 8 shown in FIG.
a, The central control unit 10 is operated via the personal computer interface unit 32, and the data stored in the sampling data storage unit 18 is taken out. Graphed by the display program being toured.

FIG. 7 shows various data sampled by the vehicle running characteristic analysis device 2 of the present embodiment to a personal computer 8.
In this example, a more detailed analysis was performed, and the result was displayed on a display. FIG. 7A shows FIGS. 5 and 6A.
FIG. 6 shows a change in vehicle speed with time for a running example different from FIG. The acceleration at the time of two start accelerations and the deceleration at the time of two deceleration stops are calculated from the data of the temporal change of the vehicle speed, and are displayed on the screen as acceleration 1, acceleration 2, deceleration 1, and deceleration 2. . FIG. 7B shows the frequency of the vehicle speed in each range by dividing the vehicle speed into five ranges from zero to the maximum vehicle speed. Thus, it is possible to understand at a glance which range of the vehicle speed is high and which range of the vehicle speed is low. Further, FIG. 7 (C) shows the engine load characteristic from the correlation between the engine speed on the horizontal axis and the engine negative pressure (intake manifold absolute pressure) on the vertical axis.

In this embodiment, the case where data is sampled and analyzed from both the vehicle ECU and the external sensor is described. However, the data is sampled and analyzed and displayed only from the vehicle ECU or only the external sensor. May be. FIG. 3 shows an example in which only three types of data, that is, the vehicle speed value, the engine speed, and the fuel injection time, are stored as the contents of the sampling data storage unit 18. And various data such as engine negative pressure (intake manifold absolute pressure), in-vehicle noise value, out-of-vehicle noise value, and vehicle body frequency. The configuration, number, connection relationship, and the like of other parts of the vehicle running characteristic analysis device are not limited to the present embodiment.

[0029]

According to the first and second aspects of the present invention, running characteristics such as fuel efficiency, average vehicle speed, in-vehicle noise, out-of-vehicle noise, and vibration of the vehicle are analyzed and displayed in the vehicle while the vehicle is running. This allows the user to feel the running characteristics in terms of data, which can be used for promoting the sales of vehicles.

Further, as an effect of the invention according to claim 2,
The running characteristics of the vehicle can be analyzed in more detail to provide a technical explanation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an embodiment of a vehicle running characteristic analysis device according to the present invention and connection with an external device.

FIG. 2 is a perspective view showing an external appearance of an operation unit in the embodiment of the vehicle running characteristic analyzing apparatus.

FIG. 3 is a diagram showing an example of the contents of a sampling data storage unit in one embodiment of the vehicle running characteristic analysis device.

FIG. 4 is a flowchart illustrating an example of a data analysis program in an embodiment of the vehicle running characteristic analysis device.

FIG. 5 is a diagram showing an example in which a vehicle running characteristic analysis apparatus according to an embodiment is connected to a personal computer to analyze the running characteristics and make a graph.

FIG. 6 is a diagram showing an example in which the embodiment of the vehicle running characteristic analyzing apparatus is connected to a personal computer to graph sampling data.

FIG. 7 is a diagram showing an example in which a vehicle running characteristic analyzing apparatus according to an embodiment is connected to a personal computer and running characteristics are analyzed and graphed.

[Explanation of symbols]

 2 Vehicle running characteristic analyzer 4 Vehicle ECU 4a, 6a, 12, 14, 16 Connecting means 6 External sensor 8 External computer 8a, 32 External computer connecting means 10, 20 Data sampling means 10, 22, Running characteristic analyzing means 18 Sampling data storage Means 26 Analysis result display means

Claims (2)

[Claims] 1. An apparatus mounted on a vehicle for analyzing running characteristics of the vehicle, comprising: a connection unit connected to an ECU and / or an external sensor of the vehicle; and the ECU while the vehicle is running. And / or data sampling means for sampling various data from the external sensor via the connection means, sampling data storage means for storing the various data sampled by the data sampling means, and sampling data storage means Vehicle running characteristics, comprising: running characteristics analysis means for analyzing running characteristics of the vehicle using the stored various data; and analysis result display means for displaying an analysis result by the running characteristics analysis means. Analysis device. 2. The vehicle running characteristic analysis device according to claim 1, wherein the vehicle running characteristic analysis device is configured to analyze the various data stored in the sampling data storage means with an external computer. A vehicle running characteristic analyzing apparatus, further comprising an external computer connecting means for connecting to the vehicle.