JPS6040761A - Method of controlling fuel injection of internal- combustion engine - Google Patents
Method of controlling fuel injection of internal- combustion engineInfo
- Publication number
- JPS6040761A JPS6040761A JP14894883A JP14894883A JPS6040761A JP S6040761 A JPS6040761 A JP S6040761A JP 14894883 A JP14894883 A JP 14894883A JP 14894883 A JP14894883 A JP 14894883A JP S6040761 A JPS6040761 A JP S6040761A
- Authority
- JP
- Japan
- Prior art keywords
- injection control
- fuel injection
- combustion engine
- micro
- processor
- 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.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 59
- 239000007924 injection Substances 0.000 title claims abstract description 59
- 239000000446 fuel Substances 0.000 title claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 6
- 230000007257 malfunction Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/008—Controlling each cylinder individually
- F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
【発明の詳細な説明】
発明の技術分野
本発明は、マイクロプロセッサを備えた内燃機関の燃料
噴射制御システムにおける噴射制御方式％式％
従来技術と問題点
内燃機関の燃料噴射制御方式として、各気筒ごとに最適
のタイミングで燃料の噴射を指令する独立噴射制御の方
式と、各気筒に対し同一のタイミングで燃料の噴射を指
令する同時噴射方式とがある。前者は高精度の噴射制御
が可能であるという利点を有する半面、制御が複雑なた
め処理能力の大きなマイクロプロセッサを必要とすると
いう欠点がある。Detailed Description of the Invention Technical Field of the Invention The present invention relates to an injection control method in a fuel injection control system for an internal combustion engine equipped with a microprocessor. There is an independent injection control method in which fuel injection is commanded at the optimal timing for each cylinder, and a simultaneous injection control method in which fuel injection is commanded at the same timing for each cylinder. The former has the advantage that highly accurate injection control is possible, but has the disadvantage that control is complex and requires a microprocessor with large processing power.
従来、独立噴射制御方式においては、マイクロプロセッ
サが故障した場合でも噴射制御が続行出来るよう、予備
のマイクロプロセッサを備え、現用のマイクロプロセッ
サが故障すると予備に切替えて独立噴射制御を行ってい
た。このため、高価なマイクロプロセッサが２台も必要
になり、システム・コストが高くなるという問題があっ
た。Conventionally, in independent injection control systems, a spare microprocessor is provided so that injection control can continue even if the microprocessor fails, and if the current microprocessor fails, the system switches to the spare and performs independent injection control. Therefore, two expensive microprocessors are required, resulting in a problem of high system cost.
発明の目的
本発明は上記従来の問題点に鑑みてなされたものであり
、その目的は、制御の精度を維持したままシステム・コ
ストを低減することが出来る噴射制御方式を提供するこ
とにある。OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide an injection control method that can reduce system costs while maintaining control accuracy.
発明の構成
上記目的を達成する本発明は、マイクロプロセッサの正
常時には該マイクロプロセッサを使用して高精度の独立
燃料噴射制御を行い、マイクロプロセッサの異常時には
別途備えた専用の安価な燃料噴射制御装置を使用して同
時燃料噴射制御を行うように構成されている。Structure of the Invention The present invention achieves the above object by using a microprocessor to perform highly accurate independent fuel injection control when the microprocessor is normal, and by providing a dedicated inexpensive fuel injection control device separately provided when the microprocessor is abnormal. It is configured to perform simultaneous fuel injection control using.
以下２本発明の更に詳細を実施例によって説明する。Further details of the present invention will be explained below with reference to two examples.
発明の実施例
第１図は１本発明の一実施例が適用される燃料噴射制御
システムの構成ブロック図であり、１０は４気筒の内燃
機関、２０は独立噴射制御用のマイクロプロセッサ、３
０はスイッチ、４０はドライバ、５０はインジェクタ、
６０は噴射制御出力線、７０は故障検出／切替え回路、
８０は同時噴射制御回路である。Embodiment of the Invention FIG. 1 is a block diagram of a fuel injection control system to which an embodiment of the present invention is applied, in which 10 is a four-cylinder internal combustion engine, 20 is a microprocessor for independent injection control, and 3
0 is a switch, 40 is a driver, 50 is an injector,
60 is an injection control output line, 70 is a failure detection/switching circuit,
80 is a simultaneous injection control circuit.
マイクロプロセッサ２０は、内燃機関１０から信号線２
１を介して回転信号の他２機関温度や排ガス中の酸素濃
度等機関の動作状態を表示する各種のセンサ信号を受け
、これらの信号に基づいて各気筒ごとに噴射開始タイミ
ング、噴射時間を算定する。マイクロプロセッサ２０は
、これら噴射開始タイミングと噴射時間に基づき各気筒
に対し最適のタイミングの噴射制御信号を作成し、信号
線２２上に出力する。信号線２２上の噴射制御信号は、
スイッチ３０．ドライバ４０，１１Ｊ！射制御出力線及
びインジェクタ５０を介して内燃機関１０に供給される
。Microprocessor 20 connects signal line 2 from internal combustion engine 10 to
In addition to the rotation signal via 1, it receives various sensor signals that display engine operating conditions such as engine temperature and oxygen concentration in exhaust gas, and calculates injection start timing and injection time for each cylinder based on these signals. do. The microprocessor 20 creates an injection control signal with the optimum timing for each cylinder based on these injection start timing and injection time, and outputs it onto the signal line 22. The injection control signal on the signal line 22 is
Switch 30. Driver 40, 11J! The fuel is supplied to the internal combustion engine 10 via the injection control output line and the injector 50.
回転信号をＥＣ，第１．第３．第４及び第２気筒に順次
供給される噴射制御信号をそれぞれＦｌ、Ｆ３．Ｆ４及
びＦ２と表示すれば、これら各信号のタイミングの関係
は第２図に例示するようなものとなり、各気筒に対して
独立噴射制御が行われる。なお０回転信号ＥＧの間隔は
３６０度クランク角度に相当している。The rotation signal is EC, 1st. Third. The injection control signals that are sequentially supplied to the fourth and second cylinders are Fl, F3. If F4 and F2 are displayed, the timing relationship of these signals will be as illustrated in FIG. 2, and independent injection control will be performed for each cylinder. Note that the interval between the 0 rotation signals EG corresponds to 360 degrees of crank angle.
故障検出〆切替え回路７０は、マイクロプロセッサ２０
のリセット信号や入出力ボート等を監視することにより
マイクロプロセッサ２０の故障の有無を監視し、故障発
生を検出すると、信号線７１を介してスイッチ３０を切
替える。同時噴射制御回路８０ば、上述したマイクロプ
ロセッサ２０による独立噴射制御と並行して同時噴射制
御を実行し、第３図に示すようなタイミングの同時噴射
制御信号を信号線８１上に出力している。従って、スイ
ッチ３０が切替えられると、信号線８１上の同時噴射制
御信号がドライバ４０．インジェクタ５０及び噴射制御
出力線６０を介して内燃機関１０の各気筒に供給される
。The failure detection switching circuit 70 is configured by the microprocessor 20.
The presence or absence of a failure in the microprocessor 20 is monitored by monitoring the reset signal, input/output port, etc. of the microprocessor 20, and when a failure is detected, the switch 30 is switched via the signal line 71. The simultaneous injection control circuit 80 executes simultaneous injection control in parallel with the independent injection control by the microprocessor 20 described above, and outputs a simultaneous injection control signal having the timing shown in FIG. 3 onto the signal line 81. . Therefore, when the switch 30 is toggled, the simultaneous injection control signal on the signal line 81 is transmitted to the driver 40. The fuel is supplied to each cylinder of the internal combustion engine 10 via the injector 50 and the injection control output line 60.
同時噴射制御回路８０は、典型的にはマイクロプロセッ
サで構成されるが、各気筒ごとの噴射側ｆａｌｌを行わ
ない分だけマイクロプロセッサ２０に比較して処理能力
が小さく安価なものを使用できる。また、噴射開始タイ
ミングや噴射時間を固定する簡易な同時噴射制御を行う
ようにすれば、同時噴射制御回路８０をハードウェアだ
けで構成することもできる。The simultaneous injection control circuit 80 is typically composed of a microprocessor, but since it does not execute the injection side fall for each cylinder, it can be used with a circuit that has a smaller processing capacity and is cheaper than the microprocessor 20. Further, if simple simultaneous injection control is performed in which the injection start timing and injection time are fixed, the simultaneous injection control circuit 80 can be configured only by hardware.
発明の効果
上述のように２本発明は マイクロプロセッサの正常時
には該マイクロプロセツサを使用して高精度の独立燃料
噴射制御を行い、マイクロプロセッサの異常時には別途
備えた専用の安価な燃料噴射制御装置を使用して同時燃
料噴射制御を行うように構成されているので、正常時の
噴射制御の精度を維持したままシステム・コストを低減
することが出来るという利点がある。Effects of the Invention As mentioned above, two aspects of the present invention are as follows: When the microprocessor is normal, the microprocessor is used to perform highly accurate independent fuel injection control, and when the microprocessor is abnormal, a dedicated inexpensive fuel injection control device is provided separately. Since the system is configured to perform simultaneous fuel injection control using the system, there is an advantage that the system cost can be reduced while maintaining the accuracy of injection control during normal operation.
第１図は本発明の一実施例が適用される燃料噴射制御シ
ステムの構成ブロック図、第２図、第３図は上記本発明
の一実施例の動作を説明するための波形図である。
１０・・内燃機関、２０・・マイクロプロセッサ、３０
・・スイッチ、４０・・ドライバ、５０・・インジェク
タ、６０・・噴射制御出力線。
特許出願人 富士通テン株式会社FIG. 1 is a block diagram of a fuel injection control system to which an embodiment of the present invention is applied, and FIGS. 2 and 3 are waveform diagrams for explaining the operation of the embodiment of the present invention. 10... Internal combustion engine, 20... Microprocessor, 30
...Switch, 40...Driver, 50...Injector, 60...Injection control output line. Patent applicant Fujitsu Ten Ltd.
Claims (1)
制御システムにおいて。 マイクロプロセッサの正常時には該マイクロプロセッサ
を使用して独立燃料噴射制御を行い。 マイクロプロセッサの異常時には別途備えた専用の燃料
噴射制御装置を使用して同時燃料噴射制御を行うことを
特徴とする内燃機関の燃料噴射制御方式。[Claims] Fuel injection for an internal combustion engine with a microprocessor? Ti
In control systems. When the microprocessor is normal, the microprocessor is used to perform independent fuel injection control. A fuel injection control method for an internal combustion engine, characterized in that when a microprocessor malfunctions, simultaneous fuel injection control is performed using a dedicated fuel injection control device provided separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14894883A JPS6040761A (en) | 1983-08-15 | 1983-08-15 | Method of controlling fuel injection of internal- combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14894883A JPS6040761A (en) | 1983-08-15 | 1983-08-15 | Method of controlling fuel injection of internal- combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6040761A true JPS6040761A (en) | 1985-03-04 |
Family
ID=15464232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14894883A Pending JPS6040761A (en) | 1983-08-15 | 1983-08-15 | Method of controlling fuel injection of internal- combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040761A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62228606A (en) * | 1986-03-31 | 1987-10-07 | Toshiba Corp | Extraction steam control device in extraction turbine |
| JPH07217807A (en) * | 1994-02-01 | 1995-08-18 | Miura Co Ltd | Steam supply using system |
| EP1536124A1 (en) * | 2003-11-25 | 2005-06-01 | C.R.F. Società Consortile per Azioni | Drive device for electrical injectors of an internal combustion engine common rail fuel injection system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131534A (en) * | 1979-03-29 | 1980-10-13 | Mitsubishi Electric Corp | Fuel controller for internal combustion engine |
-
1983
- 1983-08-15 JP JP14894883A patent/JPS6040761A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131534A (en) * | 1979-03-29 | 1980-10-13 | Mitsubishi Electric Corp | Fuel controller for internal combustion engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62228606A (en) * | 1986-03-31 | 1987-10-07 | Toshiba Corp | Extraction steam control device in extraction turbine |
| JPH07217807A (en) * | 1994-02-01 | 1995-08-18 | Miura Co Ltd | Steam supply using system |
| EP1536124A1 (en) * | 2003-11-25 | 2005-06-01 | C.R.F. Società Consortile per Azioni | Drive device for electrical injectors of an internal combustion engine common rail fuel injection system |
| US7059304B2 (en) | 2003-11-25 | 2006-06-13 | C.R.F. Societa Consortile Per Azioni | Drive device for electrical injectors of an internal combustion engine common rail fuel injection system |
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