JPS5916073A - Diagnosing device for motorcar - Google Patents

Abstract

PURPOSE:To reduce the amount of alternation of software and to facilitate the programming for data processing, by providing a controller with a function of storing a memory with measurement data from sensors and an arithmetic controller with a function of processing the measurement data and printing and displaying the results separately. CONSTITUTION:Analog detection data from the plural sensors 1 are converted by an A/D converter 2 into digital data, which are applied to an interface 3, whose output is applied to the controller 4. The CPU of this controller 4 stores the detection data in the memory 5 temporarily and the CPU of the arithmetic controller 6 with an arithmetic processing and a control program reads desired data out of the memory 5 and performs arithmetic processing. An operating device 7, printer 8, and display device 9 are connected to this device 6; the measurement data is stored in the memory 5 under the control of the controller 4 and the arithmetic processing of the measurement data to be outputted through the devices 8 and 9 is performed by the controller 6. Thus, the alternation amount of a program for data processing is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile diagnostic system for use in automobile maintenance work and the like.

Conventional equipment of this kind r1.One arithmetic and control unit, namely CPT
For example, sensors such as the engine rotation speed and ignition angle are connected to the L and JK interfaces on one side, and a printing device and a display device are connected on the other side.
P [1] Processes the data detected by the sensors and prints or displays the data in a manner that is easy for workers to understand.

However, according to this conventional device, a single CPU performs measurement program processing and arithmetic control processing for printing and display. The disadvantage was that it required reassembly and required a large amount of software changes.

The object of the present invention is to provide an automobile diagnostic device that eliminates such drawbacks.

Its features include a control device that connects to multiple sensors via an interface and a memory, and stores detection data from the sensors in the memory, and a printing device and display that are connected to the control device. and an arithmetic and control device that is connected to the device and extracts detected data from the memory via the control device; and processes the data and prints it on the printing device or displays it on the display device. .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A case in which the present invention is applied to diagnosis of an automobile engine will be described below as an embodiment of the present invention with reference to the drawings.

(1)...(1) is the engine speed and dwell angle.

Sensor that detects plug ignition voltage, etc. (2)...(
2) is a signal processing device consisting of an A-D converter that converts analog detection signals from these sensors (1) into digital signals for easy data processing; (S) is an interface; (4) indicates a control device, and the control device (
4) consists of a CPU, that is, a microprocessor, has a measurement program, and has a sensor (1)...(1)
The detection data from the sensor is immediately stored in the memo IJ-(5).

(6) indicates an arithmetic and control device, and the arithmetic and control device (6) similarly has a CPU, that is, a microprocessor, arithmetic processing, and a control program, and is controlled by operation commands from the operating device (7). Desired data is extracted from the memory (5) via the control device (4), processed by arithmetic processing, and processed into a table or graph, and then connected to the arithmetic and control device (6). Printing device (
In 8), these tables, graphs, etc. are printed out or displayed on the display device (9) V.

For diagnosis, the sensor (1) is placed at a predetermined position on the engine, and the detected data is stored in the memory (5) according to the measurement program of the control device (4). Then, by operating the operating device (7), the arithmetic and control device (0) extracts the necessary detection data from the memo +7-(5) via the control device (4) and calculates it based on future commands. The data is processed and printed out, for example, in the form of a table on a printing device (8) or displayed on a display device (9).

Therefore, even if the measurement is performed at high speed, the measured data is temporarily stored in the memory (5) according to the measurement program of the control device (4), so high-speed processing of data in the arithmetic and control device (6) is not required.

In the above embodiment, the case of diagnosing an engine was shown, but it is also possible to apply the present invention to diagnosing the chassis of an automobile or other parts.

In this way, according to the present invention, the functions are divided so that the control device VC has the function of storing measurement data from the sensor in the memory, and the arithmetic and control device has the function of processing the measurement data and printing or displaying it. For example, it is sufficient to change the program related to data processing, such as changing the print format, only for the arithmetic and control unit. Therefore, the amount of software changes is small, reducing labor, and the arithmetic and control unit has a high arithmetic processing speed. This has the effect that programming for data processing can be done in any language.

[Brief explanation of drawings]

The drawing is a block diagram of an example of the device of the present invention. (1)...Sensor, (3)...Interface. (4)...control device, (5)...memory. (6)...Arithmetic control device, (8)...Printing device. (9)...Display device patent applicant Daihatsu Motor Co., Ltd. Banzai

Claims (1)

[Claims] a control device that is connected to a plurality of sensors via an interface and also connected to a memory and stores detection data from the sensors in the memory; A diagnostic device for an automobile comprising an arithmetic and control device that extracts detected data via the control device, processes the data, and prints the data on the printing device or displays it on the display device.