JP3144425B2 - Engine key device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to an engine key device of an automobile provided with a fuel electronic control device.

(Related Art) In recent automobiles, a fuel electronic control device is used to inject fuel having an appropriate air-fuel ratio at an appropriate timing according to running conditions.

FIG. 3 is a block diagram of a conventional device, and an outline of the operation will be described with reference to FIG.

In FIG. 3, reference numeral 1 denotes a main body of a fuel electronic control unit composed of an MPU or the like, and data such as an engine speed, a temperature of each part of the engine, and a pressure of each part are taken into an internal storage device via a sensor 2. Based on these information taken from outside, the program processing stored in the ROM 3 in advance is performed,
The air flow control by the air flow control unit 4 and the fuel injection control by the injection control unit 5 are performed.
Contains various meter information (speed, rotation speed, pressure, temperature, etc.)
And various alarm information. Then, the driver inserts a key (not shown) into the insertion slot, short-circuits the contact 7, connects the power supply by the battery 8, and starts the engine.

(Problems to be Solved by the Invention) According to the above-described conventional device, the key merely serves to short-circuit the contact 7 and connect the battery to the engine control device side. Therefore, for example, even if the engine key is not provided (even if there is no key), it is possible to move the automobile as long as the contact 7 is short-circuited, and no countermeasures have been taken against theft.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an engine key device that does not cause any problem even if the engine key is stolen or that the engine key is not forged.

[Constitution of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides an engine key device for an automobile equipped with a fuel electronic control device that operates according to a predetermined program by closing a starting contact. A microcomputer key that stores a main part program, control data, and personal identification data required for engine control, and reads the microcomputer key to confirm the identity of the user, and is located in the microcomputer key and required for engine control. RAM for downloading programs and data of the main part, means for starting the engine when self-diagnosis is performed after the self-diagnosis of whether or not the programs and data are activated, and means for starting the engine, and stop of the vehicle are confirmed. The travel information and the alarm information are stored in the microcomputer key by the travel information writing means which becomes operable when the It was constructed from a means to upload.

(Operation) First, the driver inserts the microcomputer key into the card reader, performs an ID check and a password check, and when the identity can be confirmed, downloads the main program and control data stored in advance to the RAM. This allows the engine to be started. In the case of a stop, the running information of the engine is uploaded to the microcomputer key on condition that it is stopped, and the microcomputer key is discharged.

(Example) Hereinafter, an example is described with reference to drawings.

FIG. 1 is a configuration diagram of an embodiment of an engine key device according to the present invention.

In FIG. 1, the same portions as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 9 denotes an IC card reading device.
The main part programs and control data are downloaded,
When the engine is stopped, the data already written to the RAM is written to the IC card 10. Reference numeral 12 denotes a finger push stop button, and when this is pressed, the stop button 13 is pressed.
Are opened in conjunction with each other, and the IC card 10 is ejected accordingly. Reference numeral 14 denotes a contact that operates in accordance with the vehicle speed sensor, and is closed as long as the vehicle is moving. For example, even if the stop buttons 12 and 13 are accidentally opened, the contact is not released from the power supply 8 as long as the vehicle is running. .

FIG. 2 is a flowchart showing the processing contents of the engine key device. In FIG. 2, an IC card is used in step S1.
10 is inserted, and power is turned on (relay control) for the control device in step S2. In step S3, it is checked whether the inserted IC card is a card of the vehicle. If NG, the IC card is ejected in step S4. If the ID check is OK, the process moves to step S5 to check whether the card holder is the person. In this case, it is confirmed twice consecutively, and if the result is NG for the third time, the process proceeds to step S6 to eject the card. Steps
If OK in S5, the process proceeds to step S7, where the program data related to engine control stored in the IC card 10 in advance is downloaded to the control device RAM.
In this case, only the main part program and the main part control data need to be downloaded. In step S8, after loading the program and data, it is checked whether the operation is correct. If NG is not performed up to two times, the process returns to step S7 and is repeated. If the result of the self-diagnosis is OK, the process moves to step S10 to start the engine. The process up to here is the process related to the operation of the engine.

Next, when the vehicle is to be stopped, the stop of the vehicle is confirmed by the vehicle speed sensor 13 in step S11. If OK, the stop button 13 is depressed in step S12. This disconnects the battery. Stop button 13
At the same time, the driving information (the number of distances, trouble status, etc.) and the alarm information are uploaded to the IC card 10 in step S13. Next, in step S14, the operation of the side brake is confirmed, and if NG, the process returns to step S11 to repeat the above-described processing. Here, a voice message is output up to n times. When the operation of the side brake is confirmed in step S14, the engine is stopped in step S16, and the IC card is discharged in step S17.

The input of the password check and the like are not particularly mentioned, but for example, a ten-key may be provided on the handle portion and the input may be performed by this. Data exchange may be performed in an encrypted manner.

According to the above-described embodiment, since the ID check and the password check are both performed and the program data relating to the engine control (for starting) is downloaded to the RAM only when both are OK. The vehicle cannot be operated even if stolen or if the battery is directly connected to the engine. In addition, since driving information and the like are input to the IC card, it is useful for early detection of a failure during inspection. Furthermore, the same computer (hardware) can be applied to all types of vehicles, eliminating the need to create various ROM programs. Furthermore, since the program in the card can be rewritten, it is possible to flexibly cope with a program change.

Although the above embodiment has been described as an engine key device,
The present invention is not limited to this, and can be applied as a door lock key. In this case, a card insertion slot and a numeric keypad are provided in the door, and an ID check and a password check are performed in the same manner as in the above embodiment. In addition, an open button “O” and a close button “C” are provided side by side. Press the “O” button to open it, press the “C” button to close it,
It is necessary to ensure the reliability of operation.

According to the embodiment of the door, since the door is not opened even if the IC card is stolen, the forgery of the key can be prevented and the limitation of the user can be ensured.

When used for a door lock, it is natural to add a lock control unit, and a detailed description thereof will be omitted.

Although the description has been given of the case where the IC card is used according to the above embodiment, it is obvious that the present invention is not limited to the IC card, and any device having a built-in CPU and memory (this is called a microcomputer key) may be used. .

[Effects of the Invention] As described above, according to the present invention, not only the prevention of theft of the automobile, but also the maintenance including the management of the driving situation is facilitated, and the misalignment is prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment for explaining an engine key device according to the present invention, FIG. 2 is a flowchart showing processing contents of the engine key device, and FIG. 3 is a diagram for explaining a conventional device. 1 ... Fuel electronic control unit main body, 2 ... Sensor, 3 ...
ROM 4 Airflow control unit 5 Injection control unit 6 Panel information 7 Engine contacts 8 Battery 9 IC card reader 10 IC card 11 RAM 12 13 ... Stop button, 14 ... Vehicle speed sensor button

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F02N 11/10 F02N 15/00

Claims (1)

(57) [Claims] 1. An engine key device for an automobile equipped with a fuel electronic control device that operates in accordance with a predetermined program by closing a starting contact, a program of a main part required for engine control, control data, and personal identification data. A microcomputer key stored therein, a RAM in which a program and data of a main part required for engine control in the microcomputer key after being authenticated by reading the microcomputer key are downloaded, and the program, Means for starting the engine when the operation can be expected after self-diagnosis of whether or not the data is activated, and traveling information writing means which becomes operable when the stop of the vehicle is confirmed; And means for uploading alarm information.