JPH0383358U - - Google Patents
Info
- Publication number
- JPH0383358U JPH0383358U JP14486189U JP14486189U JPH0383358U JP H0383358 U JPH0383358 U JP H0383358U JP 14486189 U JP14486189 U JP 14486189U JP 14486189 U JP14486189 U JP 14486189U JP H0383358 U JPH0383358 U JP H0383358U
- Authority
- JP
- Japan
- Prior art keywords
- engine
- lean
- air
- control device
- throttle valve
- 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
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 239000002737 fuel gas Substances 0.000 description 3
- 241000234435 Lilium Species 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
第１図は、本考案にかかる燃焼制御装置を備え
たガスエンジンのシステム構成図である。第２図
は、コントロールユニツトによる燃焼制御の制御
方法を示すフローチヤートである。第３図は、エ
ンジンの運転限界と、高出力領域と、ＮＯｘ発生
量の多い領域とを、エンジン回転数と吸気圧とに
対してあらわした図である。第４図は、空燃比特
性をリツチセツトにした場合における、エンジン
回転空と吸気圧とに対するエンジン出力と、エン
ジン回転数とエンジン出力とに対するＮＯｘ濃度
指数とを示す図である。第５図は、空燃比をリー
ンセツトにした場合における、第４図と同様の図
である。第６図は、エンジン出力の空燃比に対す
る特性と、ＮＯｘ濃度指数の空燃比に対する特性
とを示す図である。第７図は、ＮＯｘ濃度がピー
クとなる空気過剰率の、エンジン回転数とエンジ
ン出力とに対する特性を示す図である。
１……エンジン、２……吸気通路、３……ミキ
サ、４……アクチユエータ、５……スロツトルバ
ルブ、６……排気通路、７……燃料ガス供給通路
、８……燃料ガス供給源、９……ベンチユリ部、
１１……燃料ガスバイパス通路、１２……ソレノ
イドバルブ、１３……コントロールユニツト。
FIG. 1 is a system configuration diagram of a gas engine equipped with a combustion control device according to the present invention. FIG. 2 is a flowchart showing a method of controlling combustion by the control unit. FIG. 3 is a diagram showing engine operating limits, a high output region, and a region in which a large amount of NO x is generated with respect to engine speed and intake pressure. FIG. 4 is a diagram showing engine output with respect to engine rotational air and intake pressure, and NO x concentration index with respect to engine rotation speed and engine output when the air-fuel ratio characteristic is set to reset. FIG. 5 is a diagram similar to FIG. 4 when the air-fuel ratio is set to a lean set. FIG. 6 is a diagram showing the characteristics of the engine output with respect to the air-fuel ratio and the characteristics of the NO x concentration index with respect to the air-fuel ratio. FIG. 7 is a diagram showing the characteristics of the excess air ratio at which the NO x concentration peaks with respect to engine speed and engine output. DESCRIPTION OF SYMBOLS 1... Engine, 2... Intake passage, 3... Mixer, 4... Actuator, 5... Throttle valve, 6... Exhaust passage, 7... Fuel gas supply passage, 8... Fuel gas supply source, 9... Bench lily club,
11... Fuel gas bypass passage, 12... Solenoid valve, 13... Control unit.
Claims (1)
変えられるようにしたガスエンジンに対して設け
られる燃焼制御装置であつて、 エンジンの空燃比特性をリツチセツトとリーン
セツトの２種設定し、通常はリツチセツトにして
エンジンを運転する一方、エンジンの運転状態が
、リツチセツトにしたのではＮＯｘ発生量が多く
なるような運転領域に入つたときには、リーンセ
ツトにしてエンジンを運転するとともに、スロツ
トルバルブを開方向に作動させて吸気のリーン化
による出力低下を補償するようにしたことを特徴
とするガスエンジンの燃焼制御装置。[Scope of Claim for Utility Model Registration] A combustion control device provided for a gas engine in which the amount of intake air can be changed by opening and closing a throttle valve, which controls the air-fuel ratio characteristics of the engine in two ways: rich set and lean set. Normally, the engine is run with the engine set to a rich set, but when the engine operating conditions enter a range where the amount of NOx generated increases if the engine is set to a rich set, the engine is run with a lean set. A combustion control device for a gas engine, characterized in that a throttle valve is operated in an opening direction to compensate for a decrease in output due to lean intake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14486189U JPH0741879Y2 (en) | 1989-12-14 | 1989-12-14 | Combustion control device for gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14486189U JPH0741879Y2 (en) | 1989-12-14 | 1989-12-14 | Combustion control device for gas engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0383358U true JPH0383358U (en) | 1991-08-23 |
| JPH0741879Y2 JPH0741879Y2 (en) | 1995-09-27 |
Family
ID=31691533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14486189U Expired - Lifetime JPH0741879Y2 (en) | 1989-12-14 | 1989-12-14 | Combustion control device for gas engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741879Y2 (en) |
-
1989
- 1989-12-14 JP JP14486189U patent/JPH0741879Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0741879Y2 (en) | 1995-09-27 |
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