JPH03238541A - Controller for automobile - Google Patents
Controller for automobileInfo
- Publication number
- JPH03238541A JPH03238541A JP2034969A JP3496990A JPH03238541A JP H03238541 A JPH03238541 A JP H03238541A JP 2034969 A JP2034969 A JP 2034969A JP 3496990 A JP3496990 A JP 3496990A JP H03238541 A JPH03238541 A JP H03238541A
- Authority
- JP
- Japan
- Prior art keywords
- data
- external
- storage means
- check data
- eprom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005856 abnormality Effects 0.000 claims abstract description 4
- 239000000446 fuel Substances 0.000 abstract description 13
- 230000004075 alteration Effects 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、自動車用制御装置に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to a control device for an automobile.
従来、自動車において、電子制御装置によりエンジンに
供給する燃料量を調整することが行われている。そして
、処理装置に対しＲＯＭ （リードオンリメモリ）を外
付けし、このＲＯＭに各種データを記憶するようにして
いる。Conventionally, in automobiles, the amount of fuel supplied to the engine has been adjusted by an electronic control device. A ROM (read only memory) is externally attached to the processing device, and various data are stored in this ROM.
ところが、自動車製造メーカからの出荷後において、ユ
ーザが外付ＲＯＭの記憶内容（エンジンに供給する燃料
量、燃料カットの回転数等）を書き替えて、車両の制御
状態を変更する可能性がある。However, after the vehicle is shipped from the vehicle manufacturer, there is a possibility that the user may rewrite the contents stored in the external ROM (amount of fuel supplied to the engine, number of rotations for fuel cut, etc.) and change the control state of the vehicle. .
この発明の目的は、外付ＲＯＭのデータの改ざんに伴う
不具合を回避できる自動車用制御装置を提供することに
ある。An object of the present invention is to provide a control device for an automobile that can avoid problems caused by tampering with data in an external ROM.
この発明は、処理装置とは別に、当該処理装置の制御の
ためのデータを記憶した外部記憶手段が接続され、前記
処理装置が前記記憶手段のデータに基ついて車載機器を
制御するようにした自動車用制御装置において、
前記処理装置の内部に、前記外部記憶手段のデータに基
づくチェックデータを予め記憶した内部記憶手段を設け
、処理装置が所定のタイミングで前記外部記憶手段のデ
ータに基づきチェックデータを作成し、このチェックデ
ータと前記内部記憶手段のチェックデータとを比較して
不一致のときには異常モートを設定するようにした自動
車用制御装置をその要旨とするものである。The present invention provides an automobile in which an external storage means that stores data for controlling the processing device is connected to the processing device, and the processing device controls in-vehicle equipment based on the data in the storage device. In the control device, an internal storage means is provided in the processing device in which check data based on the data in the external storage device is stored in advance, and the processing device stores the check data based on the data in the external storage device at a predetermined timing. The gist of the present invention is to provide a control device for an automobile, which compares the check data with the check data stored in the internal storage means and sets an abnormal mode when there is a discrepancy.
処理装置は所定のタイミングで外部記憶手段のデータに
基づくチェックデータを作成し、このチェックデータと
内部記憶手段のチェックデータとを比較する。そして、
両チェックデータが不一致のときには外部記憶手段のデ
ータの改ざんが行われたとして異常モードを設定する。The processing device creates check data based on the data in the external storage means at a predetermined timing, and compares this check data with the check data in the internal storage means. and,
If the two check data do not match, it is determined that the data in the external storage means has been tampered with and an abnormal mode is set.
つまり、例えば、警告を行ったり、外部記憶手段のデー
タによらずに車載機器の制御を行う。That is, for example, it issues a warning or controls the in-vehicle equipment without depending on the data in the external storage means.
〔実施例〕
以下、この発明を具体化した一実施例を図面に従って説
明する。[Embodiment] An embodiment embodying the present invention will be described below with reference to the drawings.
第１図には本実施例の自動車用制御装置の電気的構成を
示す。FIG. 1 shows the electrical configuration of the automobile control device of this embodiment.
エンジン制御系の処理装置としてのマイコン■は、中央
処理装置（以下、ＣＰＵという）２と、ランダムアクセ
スメモリ（以下、ＲＡＭという）３と、内部記憶手段と
してのＥ２ＦＲＯＭ４とから構成されている。ＣＰＵ２
とＲＡＭ３とＥ２ＰＲＯＭ４とは、１チツプ上に形成さ
れている。このマイコン１にはイグニッションスイッチ
５を介してバッテリー６が接続されている。又、マイコ
ン１には外部記憶手段としての外付ＥＰＲＯＭ７が接続
され、この外付ＥＰＲＯＭ７にはエンジンに供給する燃
料量や燃料カットの回転数が記憶されている。The microcomputer (2) as a processing device for the engine control system is composed of a central processing unit (hereinafter referred to as CPU) 2, a random access memory (hereinafter referred to as RAM) 3, and an E2FROM 4 as an internal storage means. CPU2
, RAM3, and E2PROM4 are formed on one chip. A battery 6 is connected to the microcomputer 1 via an ignition switch 5. Further, an external EPROM 7 is connected to the microcomputer 1 as an external storage means, and this external EPROM 7 stores the amount of fuel to be supplied to the engine and the rotational speed at which the fuel is cut.
マイコンｌのＣＰＵ２にはエンジン回転数信号やエンジ
ン冷却水温信号等が入力される。又、ＣＰＵ２には警告
灯８が接続され、この警告灯８は外付ＥＰＲＯＭ７のデ
ータが改ざんされたときに点灯する。さらに、マイコン
ｌのＣＰＵ２には切換スイッチ９を介して車載機器とし
てのインジェクタＩＯが接続されている。そして、マイ
コン１のＣＰＵ２はエンジン回転数信号とエンジン冷却
水温信号等に基づいてインジェクタＩＯを駆動して所定
量の燃料をエンジンに供給するようになっている。An engine rotation speed signal, an engine cooling water temperature signal, etc. are input to the CPU 2 of the microcomputer 1. Further, a warning light 8 is connected to the CPU 2, and this warning light 8 lights up when the data in the external EPROM 7 is tampered with. Further, an injector IO as an in-vehicle device is connected to the CPU 2 of the microcomputer 1 via a changeover switch 9. The CPU 2 of the microcomputer 1 drives the injector IO based on the engine rotational speed signal, the engine cooling water temperature signal, etc. to supply a predetermined amount of fuel to the engine.
又、マイコンｌのＣＰＴＪ２にはバックアップ用ＩＣＩ
Ｉが接続され、バックアップ用ＩＣＩＩはＣＰＵ２から
の異常信号の入力により切換スイッチ９を切り換え制御
するとともに、エンジン回転数信号に基づいてインジェ
クタ１０を制御するようになっている。又、ＣＰＵ２に
は外付ＥＰＲＯＭ７のデータの改ざんをチエツクのため
のチエツクプログラム格納領域２ａが用意され、この領
域２ａのデータはユーザによっては改ざんできなくなっ
ている。Also, the CPTJ2 of the microcontroller I has a backup ICI.
I is connected, and the backup ICII switches and controls the changeover switch 9 based on the input of the abnormality signal from the CPU 2, and also controls the injector 10 based on the engine rotation speed signal. Further, the CPU 2 is provided with a check program storage area 2a for checking whether the data in the external EPROM 7 has been tampered with, and the data in this area 2a cannot be tampered with by the user.
次に、このように構成した自動車用制御装置の作用を第
２図のフローチャートに従って説明する。Next, the operation of the automobile control device configured as described above will be explained according to the flowchart shown in FIG.
自動車製造工場での車両検査の際にイグニッションスイ
ッチ５かオン操作され電源が投入されると、ＣＰＵ２は
第２図の処理を開始する。When the ignition switch 5 is turned on and the power is turned on during a vehicle inspection at an automobile manufacturing factory, the CPU 2 starts the process shown in FIG. 2.
まず、ＣＰＵ２はステップ１００で外付ＥＰＲＯＭ７の
データビットの総和値を算出し、ステップ１０１で最初
の電源投入（イグニッションスイッチ５のオン操作）か
否かを判断する。つまり、自動車製造工場での出荷の際
の検査のときに、電源が投入されたことを検出して、Ｅ
２ＰＲＯＭ４に外付ＥＰＲＯＭ７のデータビットの総和
値を書き込む。First, in step 100, the CPU 2 calculates the total value of the data bits in the external EPROM 7, and in step 101, determines whether or not the power is turned on for the first time (the ignition switch 5 is turned on). In other words, during an inspection at a car manufacturing factory before shipment, it is detected that the power has been turned on, and the
Write the total value of the data bits in the external EPROM 7 to the 2PROM4.
そして、ＣＰＵ２は自動車製造工場での出荷の際のエン
ジン検査のために、ステップ１０３で燃料制御を行う。Then, the CPU 2 performs fuel control in step 103 for engine inspection at the time of shipment at an automobile manufacturing factory.
又、自動車製造工場からの自動車の出荷後において、イ
グニッションスイッチ５のオン操作のときに、ＣＰＵ２
はステップ１００で外付ＥＰＲ○Ｍ７のデータビットの
総和を計算し、ステップ１０１で最初の電源投入でない
と判断する。そして、ＣＰＵ２はステップ１０４で外付
ＥＰＲＯＭ７のデータビットの総和値と、Ｅ２ＦＲＯＭ
４に記憶した外付ＥＰＲＯＭ７のデータビットの総和値
とを比較し、一致すると外付ＥＰＲＯＭ７のデータの改
さんは行われず正常とみなして、ステップ１０３でイン
ジェクタＩＯによる燃料制御を行う。Further, after the car is shipped from the car manufacturing factory, when the ignition switch 5 is turned on, the CPU 2
In step 100, the sum of data bits of the external EPR M7 is calculated, and in step 101, it is determined that the power is not turned on for the first time. Then, in step 104, the CPU 2 calculates the total value of the data bits of the external EPROM 7 and the E2FROM.
4 is compared with the total value of the data bits of the external EPROM 7 stored in step 103, and if they match, the data in the external EPROM 7 is deemed to be normal without being tampered with, and fuel control by the injector IO is performed in step 103.
一方、ＣＰＵ２は前記ステップ１０４において外付Ｅ
Ｐ ＲＯＭ ７のデータビットの総和値と、Ｅ２ＦＲＯ
Ｍ４に記憶した外付ＥＰＲＯＭ７のデータビットの総和
値とか一致しないと、ステップ１０５で外付ＥＰＲＯＭ
７のデータの改ざんが行われたとして警告灯８を点灯さ
せる。さらに、ＣＰＵ２はバックアップ用ＩＣＩＩに異
常信号を出力する。この異常信号によりバックアップ用
ＩＣＩ■が切換スイッチ９を駆動して、第１図中、−点
鎖線で示すように切り換えバックアップ用ＩＣ１１とイ
ンジェクタ１０とを接続させる。以後、バックアップ用
ＩＣ１１はエンジン回転数信号に基づいてインジェクタ
１０を駆動制御して燃料量を調整する。On the other hand, in step 104, the CPU 2
The total value of data bits of P ROM 7 and E2FRO
If the total value of the data bits of the external EPROM 7 stored in M4 do not match, in step 105 the data bits of the external EPROM 7
A warning light 8 is turned on to indicate that data 7 has been tampered with. Further, the CPU 2 outputs an abnormality signal to the backup ICII. In response to this abnormal signal, the backup IC 11 drives the changeover switch 9 to connect the changeover backup IC 11 and the injector 10 as shown by the dashed line in FIG. Thereafter, the backup IC 11 controls the drive of the injector 10 based on the engine rotational speed signal to adjust the amount of fuel.
このように本実施例は、自動車製造工場からの出荷時に
おいて、マイコン１ （処理装置）の内部に、外付ＥＰ
ＲＯＭ７ （外部記憶手段）のデータヒツトの総和値（
チェックデータ）を予め記憶したＥ２ＦＲＯＭ４ （内
部記憶手段）を設け、自動車製造工場から出荷後におい
て、マイコンｌが電源の投入毎に外付ＥＰＲＯＭ７のデ
ータビットの総和値を求め、この総和値と、Ｅ２ＦＲＯ
Ｍ４に記憶した外付ＥＰＲＯＭ７のデータビットの総和
値とを比較して不一致のときには警告灯８を点灯させる
とともに、切換スイッチ９を切り換えてマイコン１によ
らずバックアップ用ＩＣ１１によりエンジンの燃料量を
調整するようにした。In this way, in this embodiment, an external EP is installed inside the microcomputer 1 (processing device) at the time of shipment from the automobile manufacturing factory.
The total value of data hits in ROM7 (external storage means) (
An E2FROM 4 (internal storage means) is provided in which check data (check data) is stored in advance, and after the car is shipped from the automobile manufacturing factory, the microcontroller 1 calculates the total value of the data bits in the external EPROM 7 every time the power is turned on, and stores this total value and the E2FROM 4.
It compares the total value of the data bits of the external EPROM 7 stored in M4, and if there is a discrepancy, lights up the warning light 8, and also switches the changeover switch 9 to adjust the fuel amount of the engine by the backup IC 11 without depending on the microcomputer 1. I decided to do so.
その結果、ユーザが外付ＥＰＲＯＭ７の記憶内容、例え
ば、エンジンに供給する燃料量や燃料カットの回転数等
を書き替えて、車両の制御状態を変更しようとしても、
ステップ１０４でのチエツク処理により改ざんが発見さ
れエンジンがバックアップ用ＩＣＩ １にて制御される
。このようにして、外付ＲＯＭ （外付ＥＰＲＯＭ７）
のデータの改ざんが行われたとしてもそのデータに基づ
くエンジン制御は行わせない。As a result, even if the user tries to change the control state of the vehicle by rewriting the contents stored in the external EPROM 7, such as the amount of fuel supplied to the engine or the rotation speed for fuel cut,
Tampering is discovered through the check process in step 104, and the engine is controlled by the backup ICI 1. In this way, external ROM (external EPROM7)
Even if this data is tampered with, engine control based on that data will not be performed.
尚、この発明は上記実施例に限定されるものではなく、
例えば、改ざんチエツクのためのデータとしては、外付
ＥＰＲＯＭ７のデータビットの特定ビットの総和値、あ
るいは、外付ＥＰＲＯＭ７のデータビットにあるキーコ
ートを乗算したものの総和値としてもよい。Note that this invention is not limited to the above embodiments,
For example, the data for the tampering check may be the sum of specific bits of the data bits of the external EPROM 7, or the sum of the data bits of the external EPROM 7 multiplied by a key code.
以上詳述したようにこの発明によれば、外付ＲＯＭのデ
ータの改ざんに伴う不具合を回避することができる優れ
た効果を発揮する。As described in detail above, the present invention provides an excellent effect of avoiding problems associated with tampering with data in an external ROM.
第１図は実施例の自動車用制御装置の電気的構成を示す
図、第２図は作用を説明するためのフローチャートであ
る。
１は処理装置としてのマイコン、４は内部記憶手段とし
てのＥ２ＦＲＯＭ、７は外部記憶手段としての外付ＥＰ
ＲＯＭ、１０は車載機器としてのインジェクタ。FIG. 1 is a diagram showing the electrical configuration of the automobile control device according to the embodiment, and FIG. 2 is a flowchart for explaining the operation. 1 is a microcomputer as a processing device, 4 is an E2FROM as an internal storage means, and 7 is an external EP as an external storage means.
ROM, 10 is an injector as an in-vehicle device.
Claims (1)
ータを記憶した外部記憶手段が接続され、前記処理装置
が前記記憶手段のデータに基づいて車載機器を制御する
ようにした自動車用制御装置において、 前記処理装置の内部に、前記外部記憶手段のデータに基
づくチェックデータを予め記憶した内部記憶手段を設け
、処理装置が所定のタイミングで前記外部記憶手段のデ
ータに基づきチェックデータを作成し、このチェックデ
ータと前記内部記憶手段のチェックデータとを比較して
不一致のときには異常モードを設定するようにしたこと
を特徴とする自動車用制御装置。[Claims] 1. Separately from the processing device, an external storage means that stores data for controlling the processing device is connected, and the processing device controls the in-vehicle equipment based on the data in the storage means. In the automobile control device, an internal storage means is provided inside the processing device, in which check data based on the data in the external storage device is stored in advance, and the processing device reads the data in the external storage device at a predetermined timing. 1. A control device for an automobile, characterized in that check data is created based on the check data, the check data is compared with the check data in the internal storage means, and if there is a mismatch, an abnormality mode is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2034969A JP2830302B2 (en) | 1990-02-15 | 1990-02-15 | Automotive control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2034969A JP2830302B2 (en) | 1990-02-15 | 1990-02-15 | Automotive control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03238541A true JPH03238541A (en) | 1991-10-24 |
| JP2830302B2 JP2830302B2 (en) | 1998-12-02 |
Family
ID=12428973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2034969A Expired - Fee Related JP2830302B2 (en) | 1990-02-15 | 1990-02-15 | Automotive control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2830302B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09325914A (en) * | 1996-06-06 | 1997-12-16 | Ryosaku Sakuraba | Controller for game machine |
| JPH1027035A (en) * | 1996-07-12 | 1998-01-27 | Fujitsu Ltd | Information processor |
| WO2000039688A1 (en) * | 1998-12-28 | 2000-07-06 | Sega Enterprises, Ltd. | Backup memory managing device, backup memory managing method, game machine, and recorded medium |
| US6480928B2 (en) | 2000-03-16 | 2002-11-12 | Honda Giken Kogyo Kabushiki Kaisha | Memory rewriting system for vehicle controller |
| US6876892B2 (en) | 2000-04-13 | 2005-04-05 | Honda Giken Kogyo Kabushiki Kaisha | Rewriting system for vehicle controller |
| US6907495B2 (en) | 2000-04-13 | 2005-06-14 | Honda Giken Kogya Kabushiki Kaisha | Rewriting system for rewriting a memory on a vehicle controller |
| US7068147B2 (en) | 1999-12-07 | 2006-06-27 | Denso Corporation | Control information rewriting system |
| US7132923B2 (en) | 2000-03-16 | 2006-11-07 | Honda Giken Kogyo Kabushiki Kaisha | Memory rewriting system for vehicle controller |
| JP2008112443A (en) * | 1996-09-05 | 2008-05-15 | Ericsson Inc | Electronic memory alteration prevention system |
| JP2010102491A (en) * | 2008-10-23 | 2010-05-06 | Denso Corp | Microcomputer chip |
| JP2015069403A (en) * | 2013-09-30 | 2015-04-13 | クラリオン株式会社 | Program execution control system |
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| JPS6180443A (en) * | 1984-09-28 | 1986-04-24 | Toshiba Corp | Production and storage method of check data |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09325914A (en) * | 1996-06-06 | 1997-12-16 | Ryosaku Sakuraba | Controller for game machine |
| JPH1027035A (en) * | 1996-07-12 | 1998-01-27 | Fujitsu Ltd | Information processor |
| JP2011238246A (en) * | 1996-09-05 | 2011-11-24 | Ericsson Inc | System for preventing electronic memory tampering |
| JP2008112443A (en) * | 1996-09-05 | 2008-05-15 | Ericsson Inc | Electronic memory alteration prevention system |
| WO2000039688A1 (en) * | 1998-12-28 | 2000-07-06 | Sega Enterprises, Ltd. | Backup memory managing device, backup memory managing method, game machine, and recorded medium |
| US7572188B1 (en) | 1998-12-28 | 2009-08-11 | Kabushiki Kaisha Sega Enterprises | Backup memory managing device backup memory managing method game machine and recorded medium |
| US7068147B2 (en) | 1999-12-07 | 2006-06-27 | Denso Corporation | Control information rewriting system |
| US7132923B2 (en) | 2000-03-16 | 2006-11-07 | Honda Giken Kogyo Kabushiki Kaisha | Memory rewriting system for vehicle controller |
| US6480928B2 (en) | 2000-03-16 | 2002-11-12 | Honda Giken Kogyo Kabushiki Kaisha | Memory rewriting system for vehicle controller |
| US6907495B2 (en) | 2000-04-13 | 2005-06-14 | Honda Giken Kogya Kabushiki Kaisha | Rewriting system for rewriting a memory on a vehicle controller |
| US6876892B2 (en) | 2000-04-13 | 2005-04-05 | Honda Giken Kogyo Kabushiki Kaisha | Rewriting system for vehicle controller |
| JP2010102491A (en) * | 2008-10-23 | 2010-05-06 | Denso Corp | Microcomputer chip |
| JP2015069403A (en) * | 2013-09-30 | 2015-04-13 | クラリオン株式会社 | Program execution control system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2830302B2 (en) | 1998-12-02 |
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