JP2002534632A - Diagnosis method for air-filled passage in injection valve filled with air - Google Patents
Diagnosis method for air-filled passage in injection valve filled with airInfo
- Publication number
- JP2002534632A JP2002534632A JP2000592529A JP2000592529A JP2002534632A JP 2002534632 A JP2002534632 A JP 2002534632A JP 2000592529 A JP2000592529 A JP 2000592529A JP 2000592529 A JP2000592529 A JP 2000592529A JP 2002534632 A JP2002534632 A JP 2002534632A
- Authority
- JP
- Japan
- Prior art keywords
- air
- filled
- injection valve
- passage
- change
- 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.)
- Withdrawn
Links
- 238000002347 injection Methods 0.000 title claims abstract description 11
- 239000007924 injection Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000003745 diagnosis Methods 0.000 title description 6
- 238000002405 diagnostic procedure Methods 0.000 claims 2
- 230000001502 supplementing effect Effects 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D7/00—Other fuel-injection control
- F02D7/02—Controlling fuel injection where fuel is injected by compressed air
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
(57)【要約】 燃料噴射弁のエア封入路が暖機されたエンジンのシフト運転時に開閉され、吸入管への空気供給量の変化から生じる吸気管圧力の変化が検出されて閾値と比較され、その際に閾値をオーバーしないことがエラーとして評価される。吸入管圧力センサを備えたオットーサイクルエンジンのエアを封入される噴射弁におけるエア封入路の診断方法が提案されている。 (57) [Summary] The air injection passage of the fuel injection valve is opened and closed during the shift operation of the warmed-up engine, and a change in intake pipe pressure resulting from a change in the amount of air supplied to the intake pipe is detected and compared with a threshold value. In this case, the fact that the threshold value is not exceeded is evaluated as an error. There has been proposed a method of diagnosing an air-filled passage in an injection valve filled with air of an Otto cycle engine having a suction pipe pressure sensor.
Description
【０００１】 技術水準 アメリカの当局は、乗用車のための車載（オンボード）診断を規定している。
ヨーロッパでも既に車載診断に関する法律案が作られており、将来立法化される
と思われる。エンジン制御の全ての排出に関する構成部品とシステムが診断され
なければならない。従って、オットー（火花点火）エンジンのエアを封入される
噴射弁も監視されるべきである。これは、既に今日では、一方では噴射弁の最終
段階診断によって、また他方ではラムダ制御器の監視によって、行われており、
このラムダ制御器は、噴射された燃料量の基準値からの全てのずれを、基準値か
らのラムダ値のずれによって記録して調節しようとする。しかしながら噴射弁の
エアアシストが誤作動し、それによって燃料の準備が最適ではなくなった場合に
は、このことは従来からの診断機能では記録されないことがある。その結果場合
によっては、とりわけ冷温エンジンの時に、有害エミッションの大幅な上昇が生
じる。State of the Art The US authorities have specified in-vehicle (on-board) diagnostics for passenger cars.
A bill on in-vehicle diagnostics has already been drafted in Europe and is expected to be legislated in the future. All emission control components and systems of the engine control must be diagnosed. Therefore, injection valves filled with air of an Otto (spark ignition) engine should also be monitored. This is already done today, on the one hand, by final stage diagnosis of the injectors and, on the other hand, by monitoring the lambda controller,
The lambda controller attempts to record and adjust all deviations of the injected fuel quantity from the reference value by the deviation of the lambda value from the reference value. However, if the air assist of the injection valve malfunctions and the fuel preparation is not optimal, this may not be recorded by conventional diagnostic functions. As a result, a significant increase in harmful emissions may occur, especially in cold engines.
【０００２】 エア封入路の診断は、例えばＷＯ９６／０４４７３から並びにＰＣＴ／ＥＰ９
５／０２９８９から知られている。これ等によれば暖機されたエンジンの場合に
はアイドリングの際に空気の供給を遮断することが知られており、その際にアイ
ドル調節器を通して流れる空気量を監視し、また運転停止の前と後の空気量の収
支を計算することが知られている。更に、空気供給の遮断と測定されたラムダの
変化の監視が知られている。[0002] Diagnosis of air-filled passages is described, for example, in WO 96/04473 and in PCT / EP9
5/02989. According to these, it is known that in the case of a warmed-up engine, the supply of air is cut off during idling, in which case the amount of air flowing through the idle regulator is monitored, and It is known to calculate the balance of the air volume after. Furthermore, it is known to shut off the air supply and monitor the measured lambda change.
【０００３】 本発明の課題は、何らの追加の構成要素も必要としない、簡単且つ堅牢な機能
によるエア封入路の診断の提供にある。 この課題は、請求項１のメルクマールによって解決される。[0003] It is an object of the present invention to provide a diagnosis of an air-filled path with a simple and robust function, which does not require any additional components. This problem is solved by Merckmarl.
【０００４】 実施例 以下に本発明の実施例が図面に基づいて説明される。図１は、本発明の技術的
環境を示している。図２は、本発明の実施例として流れ図を明らかにしている。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the technical environment of the present invention. FIG. 2 illustrates a flowchart as an embodiment of the present invention.
【０００５】 図１において、１は内燃機関を示しており、これに吸入管２、エア封入路４、
及びエア封入路遮断手段５を備えた噴射弁３、絞り弁位置センサ７を備えた絞り
弁６、吸入管圧力センサ８、及び制御装置９が設けられている。In FIG. 1, reference numeral 1 denotes an internal combustion engine, which includes an intake pipe 2, an air sealing path 4,
An injection valve 3 provided with an air-sealed-path shutoff means 5, a throttle valve 6 provided with a throttle valve position sensor 7, a suction pipe pressure sensor 8, and a control device 9 are provided.
【０００６】 車載診断エンジン制御システムには、排気ガスフィードバックを診断するため
に、とりわけ圧力を利用した負荷検知装置の場合に、或いは排気ガスフィードバ
ック機能を有するシステムの場合に、しばしば吸入管圧力センサ８が組み込まれ
ている。圧力を基礎としたこの排気ガスフィードバック診断は、一般にエンジン
がシフト運転過程にある時に行われる。この過程は、エンジンが絞り弁を閉じら
れ（これはセンサ７によって検出することが出来る）、回転数がアイドリング回
転数の情報へ引き上げられ、従って吸気管内が強い低圧になっているということ
によって特徴付けられる。この時に排気ガスフィードバック弁が開かれると、排
気ガス設備から排気ガスが吸入管の中へ流入し、これによって吸入管内の低圧が
幾分緩和される。この圧力上昇は、圧力センサによって測定され、エンジン制御
装置で評価される。本発明はこれと同じ原理に基づいている。即ち、シフト運転
時（図２のステップ２）に、噴射弁のエア封入路が開閉され（ステップ３）、空
気の供給の変化から生じた吸入管圧力の変化が測定される（ステップ１、４、及
び５）。吸入管圧力が十分大きく変化した場合には、エア封入路の機能が十分で
あるということを推定することが出来る（ステップ６及び７）。圧力差の高さは
また、エア封入路を通って流れる空気量に関する推定を可能にするので、単に質
的な診断としてだけでなく量的な診断としても役立てることが出来る。[0006] In-vehicle diagnostic engine control systems often include a suction pipe pressure sensor 8 for diagnosing exhaust gas feedback, especially in the case of a load detection device using pressure, or in the case of a system having an exhaust gas feedback function. Is incorporated. This pressure-based exhaust gas feedback diagnosis is generally performed when the engine is in a shift operation. This process is characterized by the fact that the engine is closed with a throttle valve (which can be detected by the sensor 7) and the speed is increased to the information of the idling speed, thus resulting in a strong low pressure in the intake pipe. Attached. If, at this time, the exhaust gas feedback valve is opened, the exhaust gas flows from the exhaust gas installation into the suction pipe, which somewhat relieves the low pressure in the suction pipe. This pressure rise is measured by a pressure sensor and evaluated by the engine control. The present invention is based on this same principle. That is, during the shift operation (Step 2 in FIG. 2), the air filling passage of the injection valve is opened and closed (Step 3), and the change in the suction pipe pressure resulting from the change in the air supply is measured (Steps 1, 4). , And 5). If the suction pipe pressure has changed sufficiently large, it can be estimated that the function of the air filling path is sufficient (steps 6 and 7). The height of the pressure differential can also serve as a quantitative as well as a qualitative diagnosis since it allows an estimation of the amount of air flowing through the air containment passage.
【０００７】 これによって、本発明は、オットーサイクルエンジンにおけるエアを封入され
る噴射弁のエア封入路の診断方法を含んでいる。本発明の利点は、既に多くのシ
ステムの中に存在している圧力センサを利用することが出来ること、即ち何らの
追加の構成要素を必要としないということ、更に機能が簡単且つ堅牢であること
、エア封入路を通る空気質量流量について量的に把握するのが可能であること、
である。Accordingly, the present invention includes a method for diagnosing an air-filled passage of an injection valve filled with air in an Otto cycle engine. An advantage of the present invention is that it can utilize pressure sensors already present in many systems, i.e. does not require any additional components, and is simple and robust in function , It is possible to quantitatively grasp the mass flow rate of air passing through the air filling path,
It is.
【図１】 本発明の技術的環境の説明図である。FIG. 1 is an explanatory diagram of a technical environment of the present invention.
【図２】 本発明の実施例のフローダイヤグラムである。FIG. 2 is a flow diagram of an embodiment of the present invention.
【手続補正書】[Procedure amendment]
【提出日】平成１３年３月１６日（２００１．３．１６）[Submission date] March 16, 2001 (2001.1.3.16)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】図面[Document name to be amended] Drawing
【補正対象項目名】図２[Correction target item name] Figure 2
【補正方法】変更[Correction method] Change
【補正の内容】[Contents of correction]
【図２】 FIG. 2
Claims (2)
封入される噴射弁におけるエア封入路の診断方法において、 前記噴射弁の前記エア封入路が、暖機されたエンジンのシフト運転時に開閉さ
れ、前記吸入管への空気供給量の変化から生じる吸気管圧力の変化が、検出され
、且つ閾値と比較され、その際、前記閾値をオーバーしないことがエラーとして
評価されること、 を特徴とする診断方法。1. A method of diagnosing an air-filled passage in an injection valve filled with air of an Otto cycle engine having a suction pipe pressure sensor, the shift operation of an engine in which the air-filled passage of the injection valve is warmed up. A change in the intake pipe pressure resulting from a change in the amount of air supplied to the intake pipe is detected and compared with a threshold, and it is evaluated that an error does not exceed the threshold as an error. Characteristic diagnostic method.
流れる空気量が推定されることを特徴とする請求項１の診断方法。2. The diagnostic method according to claim 1, wherein an amount of air flowing through the air filling passage is estimated by supplementing the height of the pressure difference.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19860535.8 | 1998-12-30 | ||
| DE19860535A DE19860535A1 (en) | 1998-12-30 | 1998-12-30 | Air containment diagnosis for air-contained injectors |
| PCT/DE1999/004082 WO2000040846A1 (en) | 1998-12-30 | 1999-12-23 | Diagnosis of air containment for air-contained injection valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002534632A true JP2002534632A (en) | 2002-10-15 |
Family
ID=7892993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000592529A Withdrawn JP2002534632A (en) | 1998-12-30 | 1999-12-23 | Diagnosis method for air-filled passage in injection valve filled with air |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1068434B1 (en) |
| JP (1) | JP2002534632A (en) |
| DE (2) | DE19860535A1 (en) |
| WO (1) | WO2000040846A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10223899A1 (en) * | 2002-05-29 | 2003-12-18 | Bayerische Motoren Werke Ag | Method for checking an air supply system in an internal combustion engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06207544A (en) * | 1991-09-24 | 1994-07-26 | Nippondenso Co Ltd | Fuel injecting device |
| JPH0599055A (en) * | 1991-10-09 | 1993-04-20 | Japan Electron Control Syst Co Ltd | Controller for internal combustion engine with assist air supply device |
| JPH05263734A (en) * | 1992-03-17 | 1993-10-12 | Nissan Motor Co Ltd | Diagnostic device for assist air device |
| JP2747397B2 (en) * | 1992-08-12 | 1998-05-06 | 三菱電機株式会社 | Fuel injection device for internal combustion engine |
| JPH06346825A (en) * | 1993-06-08 | 1994-12-20 | Nippondenso Co Ltd | Abnormality detection device for assist air control device of internal combustion engine |
| FR2723149B1 (en) | 1994-08-01 | 1996-09-13 | Siemens Automotive Sa | METHOD FOR MONITORING THE PROPER OPERATION OF THE AIR SUPPORT OF A FUEL INJECTOR FOR AN INTERNAL COMBUSTION ENGINE AND CORRESPONDING DEVICE |
-
1998
- 1998-12-30 DE DE19860535A patent/DE19860535A1/en not_active Withdrawn
-
1999
- 1999-12-23 EP EP99967897A patent/EP1068434B1/en not_active Expired - Lifetime
- 1999-12-23 WO PCT/DE1999/004082 patent/WO2000040846A1/en active IP Right Grant
- 1999-12-23 JP JP2000592529A patent/JP2002534632A/en not_active Withdrawn
- 1999-12-23 DE DE59909243T patent/DE59909243D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1068434B1 (en) | 2004-04-21 |
| EP1068434A1 (en) | 2001-01-17 |
| DE19860535A1 (en) | 2000-07-06 |
| DE59909243D1 (en) | 2004-05-27 |
| WO2000040846A1 (en) | 2000-07-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20070306 |