DE3933947C1 - Combustion pressure determn. method for petrol-diesel engine - using acceleration sensors fitted at crankshaft bearings of engine in cylinder axial direction - Google Patents
Combustion pressure determn. method for petrol-diesel engine - using acceleration sensors fitted at crankshaft bearings of engine in cylinder axial directionInfo
- Publication number
- DE3933947C1 DE3933947C1 DE3933947A DE3933947A DE3933947C1 DE 3933947 C1 DE3933947 C1 DE 3933947C1 DE 3933947 A DE3933947 A DE 3933947A DE 3933947 A DE3933947 A DE 3933947A DE 3933947 C1 DE3933947 C1 DE 3933947C1
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- Prior art keywords
- acceleration
- engine
- combustion
- pressure
- combustion pressure
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- 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.)
- Expired - Lifetime
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Classifications
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- 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
- F02D41/28—Interface circuits
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- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1497—With detection of the mechanical response of the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/1455—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means by using a second control of the closed loop type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/042—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
- G01M15/046—Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring revolutions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/025—Engine noise, e.g. determined by using an acoustic sensor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1015—Engines misfires
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Bestimmen des Ver brennungsdrucks in Hubkolbenmotoren, d.h. Otto- und Dieselmotoren, und ist insbesondere auf ein Verfahren gerichtet, das die Gewinnung von Eingangsgrößen für Regelsysteme des Motors gestattet und die Feststellung einer klopfenden Verbrennung speziell in Ottomotoren gewährleistet.The invention relates to a method for determining the Ver combustion pressure in reciprocating engines, i.e. Otto and Diesel engines, and is particularly based on a process directed that the acquisition of input variables for Control systems of the engine allowed and the finding knocking combustion especially in gasoline engines guaranteed.
Der Verbrennungsdruck kann unabhängig vom Motortyp auf unterschiedlichste Arten bestimmt werden. So werden z.B. auf der Grundlage des Piezoeffekts arbeitende Druckauf nehmer unmittelbar dem Verbrennungsdruck und den Tempera turschwankungen im Verbrennungsraum ausgesetzt. Bei dieser direkten Druckmessung bestehen jedoch die folgenden Nachteile:The combustion pressure can be independent of the engine type different types can be determined. For example, pressure based on the piezo effect the combustion pressure and the tempera exposed to fluctuations in the combustion chamber. At this However, direct pressure measurement consists of the following Disadvantage:
- 1. Man benötigt für jeden Zylinder eine Sensoreinrichtung.1. A sensor device is required for each cylinder.
- 2. Im Fall der üblicherweise eingesetzten Piezodruckauf nehmer ist eine für deren Signalerfassung und -auswertung aufwendige Meß- und Auswerteanordnung nötig.2. In the case of the usually used piezo printing The recipient is one for their signal acquisition and evaluation complex measurement and evaluation arrangement necessary.
- 3. Die lokale Applizierung der Druckaufnehmer ist schwer zu realisieren und erfordert einen hohen Zeitaufwand. 3. Local application of the pressure transducers is difficult realize and requires a lot of time.
- 4. Die Langzeitkonstanz der Druckaufnehmer ist schlecht und ihr längerfristiger Einsatz ist kaum möglich.4. The long-term constancy of the pressure transducer is bad and their long-term use is hardly possible.
Diese Nachteile bedingen, daß die direkte Druckmessung mit hohem technischen und auch Kostenaufwand sich im Grunde nur für die Erprobung der Motoren auf dem Prüfstand eignet, jedoch für eine Anwendung im Fahrzeug praktisch ausscheidet.These disadvantages mean that the direct pressure measurement with high technical and also cost basically only suitable for testing the engines on the test bench, however practical for an application in the vehicle is eliminated.
In der DE 38 33 124 A1 ist zwar vorgeschlagen, zur Steuerung des Luft/Kraftstoff-Verhältnisses oder des Zündzeitpunktes bei Ottomotoren im Fahrzeug u.a. den maximalen Zylinderinnendruck mit Hilfe eines piezoelek trischen Elements zu messen, welches durch Festziehen einer Zündkerze in einem Zylinderkopf eingesetzt ist. Jedoch treffen auch auf diese Lösung die oben aufgezählten Probleme zu.DE 38 33 124 A1 does suggest that Control of air / fuel ratio or Ignition point in gasoline engines in the vehicle the maximum cylinder pressure using a piezoelectric trical element, which by tightening a Spark plug is inserted in a cylinder head. However also meet this solution the ones listed above Problems too.
Dies gilt auch für die in der DE 39 05 498 A1 vorge schlagene Lösung, eine klopfende Verbrennung mit einem zwischen zumindest einem Zylinder und einer Zündkerze befestigten piezoelektischen Druckaufnehmer festzustellen. Durch diese Messung werden zudem im einer nachgeschalteten Klopfdetektorschaltung zugeführten Drucksignal die bei der klopfenden Verbrennung auftretenden schnellen Innendruck änderungen nur andeutungsweise wiedergegeben.This also applies to those featured in DE 39 05 498 A1 proposed solution, a knocking burn with one between at least one cylinder and a spark plug fixed piezoelectric pressure transducer. This measurement also results in a downstream Knock detector circuit supplied pressure signal at the knocking combustion occurring rapid internal pressure Changes are only hinted at.
Auch andere, indirekte Verfahren, wie z.B. die Messung der Kräfte in den Zylinderkopfschrauben zur Zylinderdruck bestimmung erfordern grundsätzlich eine Meßanordnung pro Zylinder.Other indirect processes, such as the measurement of Forces in the cylinder head bolts for cylinder pressure determination basically require one measuring arrangement per Cylinder.
Um bei Ottomotoren eine klopfende Verbrennung feststellen zu können, werden im Fahrzeug ferner üblicherweise ein oder mehrere Körperschall-Klopfsensoren verwendet, die an geeig neten Stellen des Motorblocks angebracht sind. Da zwischen dem Brennraum und dem jeweiligen Klopfsensor große Schalleitungswege mit unterschiedlichem Dämpfungsverhalten liegen und zudem den von der klopfenden Verbrennung herrüh renden Schallemissionen diverse andere mechanische Schall quellen überlagert sind, ist eine sichere Klopferkennung auf diese Weise jedoch schwierig.To detect knocking combustion in gasoline engines To be able to, usually a or used several structure-borne sound knock sensors ned places of the engine block are attached. Between the combustion chamber and the respective knock sensor large Formwork cable routes with different damping behavior lying and also from the knocking combustion sound emissions various other mechanical sounds sources are superimposed is a reliable knock detection difficult in this way, however.
Infolgedessen sind Fehlerkennungen wahrscheinlich, welche die Einhaltung eines deutlichen Sicherheitsabstandes zur Klopfgrenze erfordern und damit einen Wirkungsgradverlust bewirken.As a result, misdiagnoses are likely to be what compliance with a clear safety distance from Knock limit require and thus a loss of efficiency cause.
Bei Dieselmotoren sind keine diesem Motortyp entsprechende Maßnahmen zur Verbrennungsdrucküberwachung im Fahrzeug einsatz üblich, denn aus den oben genannten Gründen scheidet eine Bestimmung des Zylinderdrucks als Kontroll maßnahme bisher aus. Es besteht jedoch im Hinblick auf die Regelung von Einspritzbeginn und -menge ein dringender Bedarf an Verbrennungsdruckmeßverfahren, die auch für den Einsatz im Fahrzeug geeignet sind.Diesel engines are not of this type Measures for monitoring combustion pressure in the vehicle usual use, for the reasons mentioned above makes a determination of the cylinder pressure as a control measure so far. However, it exists with regard to Regulation of injection start and quantity an urgent Need for combustion pressure measurement methods that also for the Are suitable for use in vehicles.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, das sowohl bei Otto- als auch bei Dieselmotoren eine zuverlässige Messung und Auswertung des Verbrennungs drucks gewährleistet und sich in den Fahrzeugen realisieren läßt.The invention has for its object a method to indicate that for both petrol and diesel engines reliable measurement and evaluation of combustion pressure guaranteed and realized in the vehicles leaves.
Diese Aufgabe wird durch den Gegenstand des Patentanspruchs 1 gelöst. Diesem liegt die Erkenntnis zugrunde, daß die an den Kurbelwellenlagern auftretenden Beschleunigungen sich zeitlich entsprechend dem Verbrennungsdruck im zugehörigen Zylinder ändern und damit die indirekte Bestimmung des Verbrennungsdrucks gestatten. Wegen der guten Schalleitung im Bereich der Kurbelwellenlagerung kann sogar mit nur einem einzigen Beschleunigungssensor für sämtliche Zylinder der zeitliche Verbrennungsdruckverlauf bestimmt werden.This object is the subject of the claim 1 solved. This is based on the knowledge that the accelerations occurring in the crankshaft bearings temporally according to the combustion pressure in the associated Change cylinder and thus the indirect determination of the Allow combustion pressure. Because of the good formwork cable in the area of the crankshaft bearing can even with only one single acceleration sensor for all cylinders of the temporal combustion pressure curve can be determined.
Diese indirekte Messung des Verbrennungsdrucks ist vorteilhaft einfach und betriebssicher, weil die an den Kurbelwellenlagern anzubringenden Beschleunigungssensoren nicht mehr direkt den Druck- und Temperaturschwankungen ausgesetzt sind. Die Sensoren sind infolgedessen leicht installier- und austauschbar, der Zugriff auf sie ist ein fach und ihre Lebensdauer spielt im Vergleich zu der der Motoren praktisch keine Rolle.This indirect measurement of the combustion pressure is advantageous simple and reliable, because the on the Accelerometers to be attached to crankshaft bearings no longer directly the pressure and temperature fluctuations are exposed. As a result, the sensors are light installable and interchangeable, access to them is a fold and their lifespan plays in comparison to that of Motors practically no role.
Darüberhinaus liefern die Beschleunigungssensoren auf einfache und reproduzierbare Weise genaue Meßwerte. Das zudem kostengünstig realisierbare Verfahren ist somit nicht mehr nur für den Prüfstand verwendbar, sondern eignet sich für den Einsatz im Fahrzeug. Dort werden die gewonnenen Meßwerte zur Regelung der Betriebsparameter und/oder zur Überwachung des Verbrennungsablaufs herangezogen bzw. ausgewertet.In addition, the acceleration sensors deliver simple and reproducible way accurate measurements. The it is also not a cost-effective method can only be used for the test bench, but is suitable for use in the vehicle. There the won Measured values for regulating the operating parameters and / or for Monitoring of the combustion process used or evaluated.
Verbrennungsdruckanstieg und -spitzenwert sind aus den gemessenen Beschleunigungskurven für beide Motortypen gut ableitbar und auch die schnellen Druckänderungen im Fall der klopfenden Verbrennung beim Ottomotor werden bereits bei relativ großem Abstand zur Klopfgrenze zuverlässig wiedergegeben. Infolgedessen kann die klopfende Verbrennung eindeutig und frühzeitig festgestellt werden, so daß eine Wirkungsgradsteigerung möglich ist. Hierzu können beim Ottomotor Gemischzusammensetzung, Füllung und Zündzeitpunkt optimiert werden.Combustion pressure rise and peak are from the measured acceleration curves for both engine types well derivable and also the rapid pressure changes in the case the knocking combustion of the gasoline engine are already reliable at a relatively large distance from the knock limit reproduced. As a result, the knocking combustion be clearly and early determined so that a Efficiency increase is possible. You can do this at Gasoline engine mixture composition, filling and ignition timing be optimized.
Aus den unmittelbar vorliegenden Beschleunigungswerten lassen sich durch geeignete Filterung demnach sowohl sehr hoch- als auch sehr tieffrequente Größen ableiten, so daß eine On-line-Regelung für verschiedenste Aufgaben in beiden Motortypen möglich ist.From the immediately available acceleration values suitable filtering means that both very high derive very low frequency sizes, so that a On-line control for various tasks in both engine types is possible.
Beim Dieselmotor sind Mengen- und Einspritzzeitpunkt regelung zur Wirkungsgradsteigerung und/oder zur Kompensation unterschiedlicher Kraftstoffqualitäten im On line-Betrieb auf der Grundlage der gemessenen Beschleuni gungswerte möglich. Auch eine Gemischregelung z.B. durch steuerbare Veränderung des Einspritzstrahls in Abhängigkeit vom zeitlichen Verbrennungsdruckverlauf bietet sich an.In the case of a diesel engine, the timing and quantity of injection are regulation to increase efficiency and / or Compensation of different fuel qualities in the on line operation based on the measured acceleration possible values. A mixture control e.g. by controllable change of the injection jet depending of the temporal course of the combustion pressure offers itself.
Grundsätzlich eignet sich jedes Beschleunigungsmeßverfahren für den erfindungsgemäßen Zweck. Es empfiehlt sich die Anwendung möglichst kompakter Beschleunigungssensoren wie sie in Form von piezoelektrischen Beschleunigungsmessern bislang schon für andere Zwecke, beispielsweise zur Unter suchung von Fahrzeugschwingungen, eingesetzt wurden. Auf diese Weise ist eine kostengünstige Anordnung zur Durchfüh rung des erfindungsgemäßen Verfahrens möglich, wobei ledig lich noch die Signale der an den Wellenlagern leicht zu befestigenden Piezo-Sensoren weiterzuleiten sind. Auch Induktions- und Kapazitätsmessungen sowie die Verwendung von Dehnmeßstreifen sind prinzipiell möglich. Die Anzahl der Beschleunigungssensoren und deren Anbringung an den Kurbelwellen richtet sich nach der speziellen Auslegung des Motors und kann für jeden Typ durch die äußerst einfache Installation der Sensoren leicht optimiert werden. Vorzugs weise erfolgt die Aufnahme der Brennraumdruckwerte für die einzelnen Zylinder mit Hilfe eines Sensors zeitversetzt bzw. mittels eines Sensorsatzes.In principle, any acceleration measurement method is suitable for the purpose of the invention. It is recommended that Application of as compact as possible acceleration sensors such as them in the form of piezoelectric accelerometers So far for other purposes, for example for sub search for vehicle vibrations. On this is an inexpensive arrangement to carry out tion of the inventive method possible, single Lich the signals of the at the shaft bearings to slightly attaching piezo sensors. Also Induction and capacitance measurements as well as use Strain gauges are possible in principle. The number of the acceleration sensors and their attachment to the Crankshafts are based on the special design of the Motors and can be of any type through the extremely simple Installation of the sensors can be easily optimized. Preferential The combustion chamber pressure values are recorded for the single cylinder with the help of a sensor or using a sensor set.
Aus den zum Verbrennungsdruck proportionalen Beschleuni gungswerten können neben den oben erwähnten Größen beliebige andere Einstell- und Regelgrößen abgeleitet werden. Dazu gehören: Verdichtung, Ansaugluftdrosselung, Belastung des Motorgehäuses, Ansauglufttemperatur, Zusatz von Klopfbremsen und der Einsatz von Zündbeschleunigern.From the accelerations proportional to the combustion pressure in addition to the above-mentioned sizes any other setting and control variables are derived will. These include: compression, intake air throttling, Load on the engine housing, intake air temperature, additive of knocking brakes and the use of ignition accelerators.
Letztlich kann das erfindungsgemäße einfache, indirekte Verfahren zur Verbrennungsdruckmessung auch bei der Ver besserung oder Neukonzipierung der Motorbauarten und insbe sondere Verbrennungsraumgestaltung angewandt werden.Ultimately, the simple, indirect Combustion pressure measurement method also for ver improvement or redesign of engine types and esp special combustion chamber design can be applied.
Im folgenden wird die Erfindung anhand der Figuren näher erläutert. Es zeigenIn the following, the invention will be explained in more detail with reference to the figures explained. Show it
Fig. 1 den Verlauf des mit Piezodruckaufnehmern aufgenom menen Brennraumdrucks in Abhängigkeit von der Zeit und Fig. 1 shows the course of the aufgenom with Piezodruckaufnehmern menen combustion chamber pressure as a function of time and
Fig. 2 den Verlauf der erfindungsgemäß zur indirekten Bestimmung des Brennraumdrucks am Kurbelwellenlager aufge nommenen Beschleunigung in Abhängigkeit von der Zeit. Fig. 2 shows the course of the invention according to the indirect determination of the combustion chamber pressure on the crankshaft bearing acceleration depending on the time.
Um das erfindungsgemäße Verfahren zu testen, wurden u.a. an einem Ottomotor gleichzeitig eine direkte Druckmessung konventioneller Art und die erfindungsgemäße Messung der Beschleunigung am Kurbelwellenlager durchgeführt. Für die Druckmessung wurden Piezodruckaufnehmer unmittelbar dem Brennraumdruck ausgesetzt, wobei der in Fig. 1 gezeigte zeitliche Verlauf des Brennraumdrucks aus der direkten Druckmessung resultierte. Mit Hilfe eines am Kurbelwellen lager angebrachten piezoelektrischen Beschleunigungssensors wurden die gleichzeitig in einer Richtung auftretenden Beschleunigungswerte am Lager gemessen, deren zeitliche Variation aus Fig. 2 hervorgeht.In order to test the method according to the invention, a direct pressure measurement of a conventional type and the measurement according to the invention of the acceleration on the crankshaft bearing were carried out simultaneously on a gasoline engine. For the pressure measurement, piezo pressure transducers were directly exposed to the combustion chamber pressure, the time course of the combustion chamber pressure shown in FIG. 1 resulting from the direct pressure measurement. With the aid of a piezoelectric acceleration sensor attached to the crankshaft bearing, the acceleration values occurring simultaneously in one direction were measured on the bearing, the variation in time of which can be seen in FIG. 2.
Das erfindungsgemäße Verfahren kann demnach einerseits zur indirekten Bestimmung von Druckanstieg und -spitzenwerten bei Hubkolbenmotoren allgemein herangezogen werden und andererseits zur sicheren Feststellung der klopfenden Ver brennung des Ottomotors ausgenutzt werden. Aus dem ermit telten Druckverlauf ist dann über die weiter oben erwähnten Einstell- und Regelgrößen eine Optimierung der Betriebs parameter und damit auch des Wirkungsgrades möglich.The method according to the invention can accordingly on the one hand indirect determination of pressure increase and peak values are generally used in reciprocating engines and on the other hand to reliably determine the knocking Ver combustion of the gasoline engine. From the ermit The pressure curve is then above that mentioned above Setting and control variables optimize the operation parameters and thus also the efficiency possible.
Der Sicherheitsabstand z.B. bezüglich Verdichtung und Be lastung kann wegen der zuverlässigen und frühzeitigen Erkennung des Klopfens beim Ottomotor verringert werden. Auch ein zu schneller Druckanstieg in einem Dieselmotor - häufig verbunden mit hoher mechanischer Belastung des Kurbeltriebs - kann festgestellt und beseitigt werden.The safety distance e.g. regarding compression and loading load can be due to the reliable and early Detection of knock on the gasoline engine can be reduced. Also a too rapid pressure increase in a diesel engine - often associated with high mechanical stress on the Crank drive - can be identified and eliminated.
Die erfaßten Beschleunigungswerte sind für eine On-line- Regelung auswertbar, wobei zahlreiche Regelgrößen (Füllung, Gemisch, Einspritz- und Zündzeitpunkt usw.) aus dem druck proportionalen Beschleunigungsverlauf ableitbar sind. Zur Auswertung der an den Sensoren abgegriffenen Signale können diese wie z.B. im Fall einer Vergleichswertregelung bei Dieselmotoren analog verarbeitet werden. Ferner sind eine differenziertere Auswertung und Ableitung anderer Größen auch durch Digitalisierung und rechnergesteuerte Verarbei tung der Beschleunigungssignale möglich, um aus diesen Ein gangsgrößen für unterschiedliche Regelungen zu gewinnen.The measured acceleration values are for an on-line Control can be evaluated, with numerous control variables (filling, Mixture, injection and ignition timing, etc.) from the pressure proportional acceleration curve can be derived. To Evaluation of the signals tapped at the sensors can these such as in the case of a comparison value regulation Diesel engines are processed analogously. Furthermore, one differentiated evaluation and derivation of other quantities also through digitization and computer-controlled processing device of the acceleration signals possible to get from this one win gears for different regulations.
Bei den durchgeführten Messungen wurden die Beschleu nigungssensoren vorzugsweise am Hauptlagerbügel für die Kurbelwelle angebracht. Darüberhinaus sind jedoch auch andere Befestigungspositionen am Motorgehäuse, gegebenen falls unter Verwendung von Angüssen, möglich. Die Beschleu nigungsmessung erfolgte vorzugsweise in Zylinderachsen richtung. Es zeigte sich jedoch, daß auch in Richtung der Kurbelwellenlängsachse gemessen werden kann.During the measurements carried out, the inclination sensors preferably on the main bracket for the Crankshaft attached. Beyond that, however other mounting positions on the motor housing, given if possible using sprues. The acceleration Inclination measurement was preferably carried out in cylinder axes direction. However, it turned out that also in the direction of Crankshaft longitudinal axis can be measured.
Claims (6)
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Application Number | Priority Date | Filing Date | Title |
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DE3933947A DE3933947C1 (en) | 1989-10-11 | 1989-10-11 | Combustion pressure determn. method for petrol-diesel engine - using acceleration sensors fitted at crankshaft bearings of engine in cylinder axial direction |
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DE3933947A DE3933947C1 (en) | 1989-10-11 | 1989-10-11 | Combustion pressure determn. method for petrol-diesel engine - using acceleration sensors fitted at crankshaft bearings of engine in cylinder axial direction |
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DE3933947C1 true DE3933947C1 (en) | 1991-01-03 |
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DE3933947A Expired - Lifetime DE3933947C1 (en) | 1989-10-11 | 1989-10-11 | Combustion pressure determn. method for petrol-diesel engine - using acceleration sensors fitted at crankshaft bearings of engine in cylinder axial direction |
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Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0643291A1 (en) * | 1993-09-09 | 1995-03-15 | New Sulzer Diesel AG | Device for determining the pressure in a cylinder of a piston engine, and diesel motor provided with such a device |
WO1997012136A1 (en) * | 1995-09-28 | 1997-04-03 | Robert Bosch Gmbh | Process and device for monitoring a fuel metering system |
WO1999013217A1 (en) * | 1997-09-06 | 1999-03-18 | Robert Bosch Gmbh | Method for controlling and regulating combustion in the combustion chamber of an internal combustion engine |
DE10028885A1 (en) * | 2000-06-10 | 2001-12-13 | Volkswagen Ag | Pressure detection method of combustion chamber in internal combustion engine, involves correcting combustion operation sensor signal using correction signal, for outputting information on combustion chamber pressure |
DE10006341C2 (en) * | 2000-02-12 | 2003-04-03 | Mtu Friedrichshafen Gmbh | Control system for an internal combustion engine |
WO2003095820A1 (en) * | 2002-05-07 | 2003-11-20 | Daimlerchrysler Ag | Method for operating an internal combustion engine |
FR2862089A1 (en) * | 2003-11-07 | 2005-05-13 | Siemens Vdo Automotive | Cylinder pressure determining device for vehicles internal combustion engine, has resistive band fitted in main bearing to detect forces exerted on bearing, due to variation of pressure in cylinders during engine operation |
DE19536110B4 (en) * | 1995-09-28 | 2005-09-29 | Robert Bosch Gmbh | Method and device for controlling an internal combustion engine |
DE102006016905A1 (en) * | 2006-04-11 | 2007-10-25 | Daimlerchrysler Ag | Process for operating an internal combustion engine, especially for determining combustion chamber pressure, comprises modeling the combustion chamber pressure on previously determined operating variables |
WO2009065549A1 (en) * | 2007-11-22 | 2009-05-28 | Continental Automotive France | Method of determining a value representative of the pressure in a combustion chamber of an internal combustion engine |
DE10045370B4 (en) * | 1999-10-18 | 2009-07-02 | Avl List Gmbh | reciprocating engine |
CN1975363B (en) * | 2005-11-28 | 2011-12-14 | 罗伯特.博世有限公司 | Method and device for operating an internal combustion engine |
EP2500705A1 (en) * | 2011-03-15 | 2012-09-19 | Wärtsilä Schweiz AG | Method for the determination of the pressure in the combustion chamber of a large diesel engine and large diesel engine |
DE102011105545A1 (en) | 2011-06-24 | 2012-12-27 | Volkswagen Aktiengesellschaft | Method for determining cylinder mass of diesel engine of car, involves determining compression course depending on change of angular velocity of crankshaft during compression stroke so as to determine combustion chamber filling |
EP1400671B1 (en) * | 2002-09-17 | 2015-10-21 | Hitachi, Ltd. | Control apparatus and control method for multi-cylinder engine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3833124A1 (en) * | 1987-09-29 | 1989-05-03 | Mitsubishi Electric Corp | DEVICE FOR MONITORING AN INTERNAL COMBUSTION ENGINE |
DE3905498A1 (en) * | 1988-02-19 | 1989-08-31 | Mitsubishi Electric Corp | DEVICE FOR CONTROLLING THE COMBUSTION CONDITIONS IN AN INTERNAL COMBUSTION ENGINE |
-
1989
- 1989-10-11 DE DE3933947A patent/DE3933947C1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3833124A1 (en) * | 1987-09-29 | 1989-05-03 | Mitsubishi Electric Corp | DEVICE FOR MONITORING AN INTERNAL COMBUSTION ENGINE |
DE3905498A1 (en) * | 1988-02-19 | 1989-08-31 | Mitsubishi Electric Corp | DEVICE FOR CONTROLLING THE COMBUSTION CONDITIONS IN AN INTERNAL COMBUSTION ENGINE |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0643291A1 (en) * | 1993-09-09 | 1995-03-15 | New Sulzer Diesel AG | Device for determining the pressure in a cylinder of a piston engine, and diesel motor provided with such a device |
DE19536110B4 (en) * | 1995-09-28 | 2005-09-29 | Robert Bosch Gmbh | Method and device for controlling an internal combustion engine |
WO1997012136A1 (en) * | 1995-09-28 | 1997-04-03 | Robert Bosch Gmbh | Process and device for monitoring a fuel metering system |
WO1999013217A1 (en) * | 1997-09-06 | 1999-03-18 | Robert Bosch Gmbh | Method for controlling and regulating combustion in the combustion chamber of an internal combustion engine |
DE10045370B4 (en) * | 1999-10-18 | 2009-07-02 | Avl List Gmbh | reciprocating engine |
DE10006341C2 (en) * | 2000-02-12 | 2003-04-03 | Mtu Friedrichshafen Gmbh | Control system for an internal combustion engine |
DE10028885A1 (en) * | 2000-06-10 | 2001-12-13 | Volkswagen Ag | Pressure detection method of combustion chamber in internal combustion engine, involves correcting combustion operation sensor signal using correction signal, for outputting information on combustion chamber pressure |
DE10028885B4 (en) * | 2000-06-10 | 2010-12-09 | Volkswagen Ag | Method and device for detecting the combustion chamber pressure occurring in a combustion chamber of an internal combustion engine |
DE10220320B3 (en) * | 2002-05-07 | 2004-01-22 | Daimlerchrysler Ag | Method for operating an internal combustion engine |
WO2003095820A1 (en) * | 2002-05-07 | 2003-11-20 | Daimlerchrysler Ag | Method for operating an internal combustion engine |
EP1400671B1 (en) * | 2002-09-17 | 2015-10-21 | Hitachi, Ltd. | Control apparatus and control method for multi-cylinder engine |
FR2862089A1 (en) * | 2003-11-07 | 2005-05-13 | Siemens Vdo Automotive | Cylinder pressure determining device for vehicles internal combustion engine, has resistive band fitted in main bearing to detect forces exerted on bearing, due to variation of pressure in cylinders during engine operation |
CN1975363B (en) * | 2005-11-28 | 2011-12-14 | 罗伯特.博世有限公司 | Method and device for operating an internal combustion engine |
DE102006016905A1 (en) * | 2006-04-11 | 2007-10-25 | Daimlerchrysler Ag | Process for operating an internal combustion engine, especially for determining combustion chamber pressure, comprises modeling the combustion chamber pressure on previously determined operating variables |
WO2009065549A1 (en) * | 2007-11-22 | 2009-05-28 | Continental Automotive France | Method of determining a value representative of the pressure in a combustion chamber of an internal combustion engine |
US8342011B2 (en) | 2007-11-22 | 2013-01-01 | Continental Automotive France | Method for determining a value representative of the pressure in a combustion chamber of an internal combustion engine |
FR2924219A1 (en) * | 2007-11-22 | 2009-05-29 | Siemens Vdo Automotive Sas | METHOD FOR DETERMINING A REPRESENTATIVE PRESSURE VALUE IN A COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE. |
EP2500705A1 (en) * | 2011-03-15 | 2012-09-19 | Wärtsilä Schweiz AG | Method for the determination of the pressure in the combustion chamber of a large diesel engine and large diesel engine |
DE102011105545A1 (en) | 2011-06-24 | 2012-12-27 | Volkswagen Aktiengesellschaft | Method for determining cylinder mass of diesel engine of car, involves determining compression course depending on change of angular velocity of crankshaft during compression stroke so as to determine combustion chamber filling |
DE102011105545B4 (en) | 2011-06-24 | 2023-05-25 | Volkswagen Aktiengesellschaft | Method for determining a combustion chamber filling of an internal combustion engine of a vehicle and control device for the internal combustion engine |
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