JPH0239556U - - Google Patents
Info
- Publication number
- JPH0239556U JPH0239556U JP11795488U JP11795488U JPH0239556U JP H0239556 U JPH0239556 U JP H0239556U JP 11795488 U JP11795488 U JP 11795488U JP 11795488 U JP11795488 U JP 11795488U JP H0239556 U JPH0239556 U JP H0239556U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- cylinder
- crank angle
- outputting
- 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
- 239000000446 fuel Substances 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案に係わる内燃機関の気筒間空燃
比差計測装置の構成図、第２図は同上装置の一実
施例を示すシステム図、第３図は同上のシステム
の原理を説明するグラフ、第４図は同上システム
の作用を説明するフローチヤートである。
１〜４……空燃比検出回路、５……酸素センサ
、６……マルチプレクサ、７……マイクロコンピ
ユータ、８……ＣＰＵ、９……メモリ、１０……
インタフエース、１６……クランク角検出器。
Fig. 1 is a configuration diagram of a device for measuring air-fuel ratio difference between cylinders of an internal combustion engine according to the present invention, Fig. 2 is a system diagram showing an embodiment of the same device, and Fig. 3 is a graph explaining the principle of the above system. , FIG. 4 is a flowchart explaining the operation of the above system. 1 to 4...Air-fuel ratio detection circuit, 5...Oxygen sensor, 6...Multiplexer, 7...Microcomputer, 8...CPU, 9...Memory, 10...
Interface, 16...Crank angle detector.
Claims (1)
おける空燃比を検出する空燃比検出手段と、クラ
ンク角検出手段と、該クランク角検出手段から出
力されるクランク角検出信号に基づいて気筒毎の
空燃比検出タイミングを発生させる空燃比検出タ
イミング発生手段と、該タイミング発生手段から
出力されるタイミング信号に基づいて各気筒の検
出空燃比を出力する空燃比出力手段と、該空燃比
出力手段から出力される空燃比を１サイクル前の
空燃比と比較する空燃比比較手段と、空燃比比較
手段から出力される信号に基づいて空燃比の変化
量が所定値以上の時に空燃比急変開始気筒と判定
する空燃比急変開始気筒判定手段と、前記空燃比
急変開始気筒を基点として各気筒の変化した空燃
比から気筒間の空燃比差を演算する空燃比差演算
手段と、を備えて構成したことを特徴とする内燃
機関の気筒間空燃比差計測装置。 An air-fuel ratio detection means for detecting the air-fuel ratio in each cylinder, which is provided corresponding to each cylinder of the internal combustion engine, a crank angle detection means, and a crank angle detection signal outputted from the crank angle detection means. An air-fuel ratio detection timing generating means for generating an air-fuel ratio detection timing, an air-fuel ratio outputting means for outputting a detected air-fuel ratio of each cylinder based on a timing signal output from the timing generating means, and an output from the air-fuel ratio outputting means. an air-fuel ratio comparison means for comparing the air-fuel ratio of the previous cycle with the air-fuel ratio of one cycle before, and a cylinder determined to be a cylinder where a sudden air-fuel ratio change starts when the amount of change in the air-fuel ratio is equal to or greater than a predetermined value based on a signal output from the air-fuel ratio comparison means. and an air-fuel ratio difference calculating means for calculating an air-fuel ratio difference between cylinders from the changed air-fuel ratio of each cylinder using the air-fuel ratio sudden change starting cylinder as a base point. Features: A device for measuring air-fuel ratio differences between cylinders in internal combustion engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11795488U JPH0239556U (en) | 1988-09-09 | 1988-09-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11795488U JPH0239556U (en) | 1988-09-09 | 1988-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0239556U true JPH0239556U (en) | 1990-03-16 |
Family
ID=31361879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11795488U Pending JPH0239556U (en) | 1988-09-09 | 1988-09-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0239556U (en) |
-
1988
- 1988-09-09 JP JP11795488U patent/JPH0239556U/ja active Pending
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