DE4014966A1 - Engine diagnosis method using temp. chamber sensitive element - to measure combustion chamber temp. at indication of engine load - Google Patents

Engine diagnosis method using temp. chamber sensitive element - to measure combustion chamber temp. at indication of engine load

Info

Publication number
DE4014966A1
DE4014966A1 DE4014966A DE4014966A DE4014966A1 DE 4014966 A1 DE4014966 A1 DE 4014966A1 DE 4014966 A DE4014966 A DE 4014966A DE 4014966 A DE4014966 A DE 4014966A DE 4014966 A1 DE4014966 A1 DE 4014966A1
Authority
DE
Germany
Prior art keywords
engine
combustion chamber
engine load
temperature
temp
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Withdrawn
Application number
DE4014966A
Other languages
German (de)
Inventor
Raimund Kottwitz
Walter Kotauscheck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to DE4014966A priority Critical patent/DE4014966A1/en
Publication of DE4014966A1 publication Critical patent/DE4014966A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D35/00Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/025Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02PIGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P17/00Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00Testing of engines
    • G01M15/04Testing internal-combustion engines
    • G01M15/042Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12
    • G01M15/048Testing internal-combustion engines by monitoring a single specific parameter not covered by groups G01M15/06 - G01M15/12 by monitoring temperature

Abstract

The method involves determining at least one parameter of an internal combustion engine with at least one combustion chamber. A temp. sensitive element is connected to the combustion chamber. The engine load is determined from the combustion chamber temp. A glow plug with temp. dependent internal resistance is used to measure the chamber temp. The engine load is compared with reference values in order to produce an engine diagnosis. The reference values are pref. determined from the amount of fuel injected or gear lever position. USE/ADVANTAGE - For investigation of engine load, power, irregularity etc. Uses existing engine components as sensor.

Description

The invention relates to a method for determining a State variable of an internal combustion engine and a Vorrich tion to carry out the procedure according to the Oberbe handles the independent claims.

Internal combustion engines are only apparently continuously working machines. So are for Example torque or speed quasi continuous Output variables, however, by a quick response sequence of individual processes are generated.

To optimize the operation of internal combustion engines, also with a view to reducing fuel consumption need, it is necessary to reduce the burden of burning to detect the engine in order to influence the Individual processes such as injected fuel quantity, on injection duration or injection pressure, the operation of the combustion affect the engine in a predetermined manner can. A prerequisite for this is a procedure for determining determination of a state variable corresponding to the load ner internal combustion engine.

From DE-PS 30 06 603 is a sensor arrangement for Er version of the knock of an internal combustion engine known is characterized in that a temperature sensitive ches element in the cylinder head gasket of the internal combustion engine machine is arranged.  

This known sensor arrangement has the disadvantage that the Cylinder head gasket to accommodate the sensor element new must be designed. Another disadvantage is that in addition to the components that belong to the internal combustion engine ren, another component on the internal combustion engine must be brought. This in turn leads to an increase of effort. A method or device for Formation of an engine diagnosis of an internal combustion engine not known from this document.

Glow plugs for heating the are also known Fuel-air mixture in the combustion chamber, resulting in a seren combustion, especially when cold starting.

The invention has for its object a method for determining a state variable of an internal combustion engine ne and an apparatus for performing the method to provide, in which the state variable with little metrological effort can be determined.

This object is achieved by the in the Kenn Character of the independent claims mentioned Merkma le solved.

The Zu is thus achieved in a simple manner stand size for which the engine load is used, with little metrological effort and without additional To determine sensor elements.

To determine the engine load is the Invention according to the combustion chamber temperature of the internal combustion engine machine used as a parameter. To measure the The combustion chamber temperature is designed as a sensor element used glow plug. For this, the temperature-dependent internal resistance of the glow plug, or Filament, evaluated and provides a measure of the burning room temperature. This arrangement has the advantage that  an existing engine component is used as a sensor, so that additional components can be omitted and the measurement technical structure is reduced.

In a further development of the invention, a Engine diagnosis based on a comparison of an engine load setpoint and the engine load. Doing so the engine load setpoint above that in the internal combustion engine injected fuel quantity determined and an engine Actual load value, which represents the motor load, as radio tion of the combustion chamber temperature formed. This procedure It has the advantage that, in addition to engine diagnosis, also egg ne analysis of the combustion processes in the internal combustion engine seem possible. There is also monitoring the internal combustion engine, for example with regard to a Overheating of individual cylinders, conceivable. The formation of the Engine diagnostics can be done at short notice as well over a longer period of time, including the engine load setpoint and the actual engine load value in a non-volatile and readable memory can be saved.

Another advantage of engine diagnosis, i.e. diag nostic investigation, is to measure the To size of motor load information to the specialist deliver what he during the operation and maintenance of a Internal combustion engine needed.

For example, the person skilled in the art can use this to stand size Information about performance, efficiency or Derive irregularities. It can be due to Localize errors starting from empirical values. Man he continues to hold information about existing aid and Monitoring devices and trend values for planning of maintenance measures.

In a further development of the invention takes place on the basis of calculated comparison data an intervention in the engine rain  lung. This has the advantage that it allows the maximum Adjusted injection quantity (blocking) (reduced) becomes.

In a further development of the invention, the Mo target load value the injected fuel quantity averages. Depending on the circumstances, this can take place in this way conditions that either for all cylinders of the internal combustion engine the total amount of fuel injected is determined or that the injected separately for each cylinder Amount of fuel is determined. The first way he calls for less metrological effort, while the second option is also a statement about that in everyone amount of fuel injected into each cylinder.

The combustion chamber temperature is separated for each cylinder detected because the temperature is a measure of the engine load represents. It would also be conceivable to record the combustion chamber temperature of a single cylinder, or the detection solution of the average combustion chamber temperature of the cylinder of what lead to a further reduction in effort would ren.

In a development of the invention, the determination of the Mo door load when the power supply is on or off supply of the glow plug. This has the advantage that with the voltage applied, the measurement of the internal resistance the glow plug (for example in the case of a current span measurement) is not falsified. In this case the electronic evaluation unit added the additional Take current flow into account. Is the power supply to the Glow plug turned off, the measurement result at a Resistance measurement through the power supply of the glow plug not be falsified.

In a development of the invention is an electronic off unit of value available, which is both the injected force  amount of substance and the temperature-dependent internal resistance the glow plug was detected. From the recorded measured values the electronic evaluation unit forms a motor load setpoint signal and a motor load actual value signal. A Engine diagnosis can, for example, from a ver equal, the difference or the integration over time derive the two engine load signals. The output of a Engine diagnostic signal can, for example, optically, alphanu merically or graphically, represented over time, respectively.

In a further embodiment of the invention, the Opti lubrication of the operation of an internal combustion engine play a regulation of the injection process conceivable, wherein the engine diagnostic signal as a reference variable for the control can be used.

Claims (12)

1. A method for determining a state variable of an internal combustion engine which has at least one combustion chamber, a temperature-sensitive element being connected to the combustion chamber, characterized in that the engine load is detected as the state variable and the engine load is determined via the combustion chamber temperature.
2. Method for determining a state variable Internal combustion engine according to claim 1, characterized in that the temperature-dependent interior resistance from the element designed as a glow plug is evaluated and as a measure of the combustion chamber temperature is used.
3. The method according to claim 1 or 2, characterized in that from a comparison of a Mo target load value and the motor load comparison data be calculated and an engine diagnosis is made where with an actual engine load value as a function of the combustion chamber temperature  is formed and a Mo from the actual engine load value Torlast actual value signal is derived that the Motorbe represents burden.
4. The method according to claim 3, characterized in that the engine load setpoint from the amount of fuel injected or the control rod assembly lung is determined and from the determined Engine load setpoint derived an engine load setpoint signal becomes.
5. The method according to claim 4, characterized in that based on the calculated Comparative data intervenes in the engine control.
6. The method according to any one of claims 3, 4 or 5, characterized in that the combustion for all combustion chambers engine the total amount of fuel injected is determined and the combustion chamber temperature for everyone Combustion chamber is recorded separately.
7. The method according to any one of claims 3, 4 or 5, characterized in that separate for each combustion chamber the amount of fuel injected is determined and the Combustion chamber temperature recorded separately for each combustion chamber is, with an adjustment in the combustion chamber amount of fuel injected based on the amount of each individual cylinder computed comparison data.
8. The method according to any one of claims 2 to 6, characterized in that the determination of the engine load when the glow plug power supply is switched off directly from a measurement of the internal resistance of the glow candle occurs while a power supply is on Compensation of the measurement result must be taken into account.  
9. Device for determining a state variable ei ner internal combustion engine having at least one combustion chamber has a temperature sensitive element with the Combustion chamber is connected, characterized in that the temperature sensitive Element at least one glow plug of the internal combustion engine is and that the filament of the glow plug has a temperature dependent internal resistance, the inner wi the level is used as a measure of the engine load.
10. The device according to claim 9, characterized in that one of the glow plugs nachge switched electronic evaluation unit to record the Internal resistance of the glow plug is provided and a Mo Torlast actual value signal forms.
11. The device according to claim 9 or 10, characterized in that the downstream electronics cal evaluation unit encoder for recording the injected Has fuel quantity or the control rod position and trained to form a motor load setpoint signal is.
12. The device according to one of claims 9 to 11, characterized in that the downstream electronics evaluation unit for calculating comparison data the engine load setpoint signal and the engine load actual value nal is trained to create engine diagnostics.
DE4014966A 1990-05-10 1990-05-10 Engine diagnosis method using temp. chamber sensitive element - to measure combustion chamber temp. at indication of engine load Withdrawn DE4014966A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4014966A DE4014966A1 (en) 1990-05-10 1990-05-10 Engine diagnosis method using temp. chamber sensitive element - to measure combustion chamber temp. at indication of engine load

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4014966A DE4014966A1 (en) 1990-05-10 1990-05-10 Engine diagnosis method using temp. chamber sensitive element - to measure combustion chamber temp. at indication of engine load

Publications (1)

Publication Number Publication Date
DE4014966A1 true DE4014966A1 (en) 1991-11-14

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ID=6406090

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4014966A Withdrawn DE4014966A1 (en) 1990-05-10 1990-05-10 Engine diagnosis method using temp. chamber sensitive element - to measure combustion chamber temp. at indication of engine load

Country Status (1)

Country Link
DE (1) DE4014966A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1310642A1 (en) 2001-11-08 2003-05-14 DaimlerChrysler AG Device and method for indirectly detecting a temperature of a predetermined spot of an internal combustion engine
DE102007009105A1 (en) * 2007-02-24 2008-08-28 Beru Ag Diesel engine controlling method for motor vehicle, involves evaluating electrical resistance process for determination of combustion parameter, which signifies cyclic fuel combustion taking place in combustion chamber of engine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012809A1 (en) * 1980-04-02 1981-10-08 Porsche Ag Automatic ignition timing control for IC engine - monitors temp. or component with correlation to combustion chamber temp.
US4363036A (en) * 1981-03-16 1982-12-07 Ncr Canada Ltd - Ncr Canada Ltee Method and apparatus for compressing digital data using non-adaptive predictive techniques
DE3131191A1 (en) * 1981-08-06 1983-02-24 May Michael G Dipl Ing Eth Method for igniting the charge of a reciprocating piston internal combustion engine and reciprocating piston internal combustion engine for performing this method
DE3203149A1 (en) * 1982-01-30 1983-08-04 Bosch Gmbh Robert Temperature sensor for an internal combustion engine
DE3323106A1 (en) * 1983-06-27 1985-01-10 Siemens Ag METHOD AND DEVICE FOR DETERMINING THE POSITION OF A CONTROL ROD ON AN INJECTION PUMP FOR COMBUSTION ENGINES
DE3415214A1 (en) * 1984-04-21 1985-10-24 Bosch Gmbh Robert Method and device for the analysis of a signal indicating the load state of an internal combustion engine
DE3739600A1 (en) * 1987-11-23 1989-06-01 Robbe Modellsport Gmbh Self-ignition combustion engine
DE3804345A1 (en) * 1988-02-12 1989-08-24 Bosch Gmbh Robert Control device for internal combustion engine
DE3913464A1 (en) * 1988-04-28 1989-11-09 Fuji Heavy Ind Ltd Control system for an internal combustion engine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012809A1 (en) * 1980-04-02 1981-10-08 Porsche Ag Automatic ignition timing control for IC engine - monitors temp. or component with correlation to combustion chamber temp.
US4363036A (en) * 1981-03-16 1982-12-07 Ncr Canada Ltd - Ncr Canada Ltee Method and apparatus for compressing digital data using non-adaptive predictive techniques
DE3131191A1 (en) * 1981-08-06 1983-02-24 May Michael G Dipl Ing Eth Method for igniting the charge of a reciprocating piston internal combustion engine and reciprocating piston internal combustion engine for performing this method
DE3203149A1 (en) * 1982-01-30 1983-08-04 Bosch Gmbh Robert Temperature sensor for an internal combustion engine
DE3323106A1 (en) * 1983-06-27 1985-01-10 Siemens Ag METHOD AND DEVICE FOR DETERMINING THE POSITION OF A CONTROL ROD ON AN INJECTION PUMP FOR COMBUSTION ENGINES
DE3415214A1 (en) * 1984-04-21 1985-10-24 Bosch Gmbh Robert Method and device for the analysis of a signal indicating the load state of an internal combustion engine
DE3739600A1 (en) * 1987-11-23 1989-06-01 Robbe Modellsport Gmbh Self-ignition combustion engine
DE3804345A1 (en) * 1988-02-12 1989-08-24 Bosch Gmbh Robert Control device for internal combustion engine
DE3913464A1 (en) * 1988-04-28 1989-11-09 Fuji Heavy Ind Ltd Control system for an internal combustion engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1310642A1 (en) 2001-11-08 2003-05-14 DaimlerChrysler AG Device and method for indirectly detecting a temperature of a predetermined spot of an internal combustion engine
DE10154484A1 (en) * 2001-11-08 2003-05-22 Daimler Chrysler Ag Device and method for the indirect determination of a temperature at a predetermined location of an internal combustion engine
US6829923B2 (en) 2001-11-08 2004-12-14 Daimlerchrysler Ag Apparatus and method for indirectly determining a temperature at a predetermined location in an internal combustion engine
DE102007009105A1 (en) * 2007-02-24 2008-08-28 Beru Ag Diesel engine controlling method for motor vehicle, involves evaluating electrical resistance process for determination of combustion parameter, which signifies cyclic fuel combustion taking place in combustion chamber of engine
DE102007009105B4 (en) * 2007-02-24 2009-04-09 Beru Ag Method for controlling the engine of a diesel engine and engine control system

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8139 Disposal/non-payment of the annual fee