EP1056942A1 - Control system for internal combustion engine comprising a sensor and an interface for digitising measurement values - Google Patents
Control system for internal combustion engine comprising a sensor and an interface for digitising measurement valuesInfo
- Publication number
- EP1056942A1 EP1056942A1 EP99934326A EP99934326A EP1056942A1 EP 1056942 A1 EP1056942 A1 EP 1056942A1 EP 99934326 A EP99934326 A EP 99934326A EP 99934326 A EP99934326 A EP 99934326A EP 1056942 A1 EP1056942 A1 EP 1056942A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- control system
- interface
- evaluation unit
- unit
- 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
Classifications
-
- 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
-
- 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
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1493—Details
- F02D41/1494—Control of sensor heater
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor
Definitions
- the invention relates to a control system for an internal combustion engine with an engine control unit and a sensor, which has an interface to the engine control unit.
- Measured values from exhaust gas probes are often required to control internal combustion engines in motor vehicles. Due to the high exhaust gas temperatures, the evaluation unit for the measured values is usually not located directly on the exhaust gas probe, but in the engine control unit.
- the associated evaluation unit is regularly housed in the engine control unit.
- the control device includes a heater control for the exhaust gas probe, a current detection circuit for detecting one of the exhaust gas probe 2 detected current, an analog / digital converter for converting the detected current into a digital signal and a microprocessor for processing sensor signals and for controlling an internal combustion engine. Because of the electromagnetic interference occurring in the engine compartment of a motor vehicle and as a result of parasitic conductance values and capacitances, only signals of the exhaust gas probe that exceed a certain level can be evaluated.
- German utility model G 89 10 740 a hot film air mass sensor with a holder is known, in which a sensor chip is arranged together with an evaluation circuit as a sensor unit in the air flow to be measured.
- a connector for the sensor which is necessary anyway, can be expanded with a housing to accommodate the evaluation unit.
- the connecting cables required to connect the sensor and the interface can easily be made watertight, with strain relief and kink protection.
- the sensor with the evaluation unit integrated in the interface has an “intelligent interface”
- communication between the engine control unit and the evaluation unit via a system bus is appropriate.
- Additional sensors can also be connected to such a system bus, which also have an evaluation unit on site
- the system bus allows a reduction in the number of connecting lines to the engine control unit, which also results in a reduction in the number of connector pins on the engine control unit, which can consequently be made more compact.
- the transmission of digital signals between the sensor interface and the engine control unit increases the system's immunity to electromagnetic interference.
- the evaluation unit comprises a microprocessor or a computing unit
- the sensor can be calibrated particularly easily in production.
- a software update is also possible for a vehicle that has already been delivered to the customer.
- the evaluation unit integrated in the interface is preferably located as close as possible to the sensor, but is arranged at a distance from it, so that hostile environmental conditions in the area of the sensor do not cause the evaluation unit to malfunction.
- the evaluation unit can regulate the sensor, for example heating the sensor, and thus relieve the engine control.
- the evaluation unit can diagnose the functionality of the sensor locally. In the event of a malfunction, the unit comprising the sensor and the interface, including the integrated evaluation unit, can simply be replaced without a comparison with the engine control unit being necessary.
- the figure shows a control system with a control unit, an exhaust gas probe and an interface.
- An engine control unit 1 is connected to a sensor, which is an exhaust gas probe 2 and more precisely a nitrogen oxide probe, via an interface 21.
- the interface 21 consists of a plug connector, an electrically conductive housing 23 for the plug connector and an evaluation unit 211 integrated in this plug housing.
- the housing 23 has a metallic cooling surface 231, which can be designed as a cooling flange.
- the cooling surface 231 is connected to the surface of a power component 212 via a thermal path 232.
- the evaluation unit 211 is cast together with the ends of signal-carrying connecting lines 22 with plastic, for example silicone, so that an optimal seal against moisture is achieved.
- the thermal path 232 along with the 5 cooling surface 231, despite the potting, sufficient heat dissipation.
- a water-repellent (hydrophobic) membrane in the housing 23 allows air to be supplied through connecting lines 11 which lead to the engine control unit 1.
- the exhaust gas probe 2 is supplied with an oxygen reference via a connecting line 22, which is used to heat the exhaust gas probe 2, since, in contrast to a signal line under the connecting lines 22, it is not cast together with the evaluation unit 211.
- the connecting lines 22 between the exhaust gas probe and the interface 21 are approximately 0.15 m to 0.5 m long.
- the connecting lines 11 between the interface 21 and the engine control unit 1 are approximately 1.5 m to 5 m long.
- a favorable length for the connecting lines 22 to the probe 2, in which, on the one hand, the electronics of the evaluation unit 211 are arranged far enough from the heat-generating exhaust gas tract without excessive parasitic effects on the signal-carrying connecting lines 22, would be about 0.3 m.
- the length of the connecting lines 11 between the interface 21 and the engine control unit 1 is then typically about 2 m.
- the connecting lines 22 can be made leakproof against moisture and safe against kinking without problems. Therefore, only extremely low parasitic conductance values or leakage resistances in the range of more than 10 M ⁇ occur. Because of the short distance between the exhaust gas probe 2 and the interface 21, and more precisely the evaluation unit 211, the connecting lines 22 are not very sensitive to electromagnetic interference. The electromagnetic compatibility can also be improved if the connection 6 lines 22 are shielded. This is easily and inexpensively possible due to the short distance, which requires little flexibility.
- the evaluation unit 211 can easily detect measurement currents of 50 nA without noise or interference preventing a usable measurement result.
- the measuring range of the nitrogen oxide probe extends down to 10 ppm.
- a central component of the measurement and control electronics of the evaluation unit 211 is a microprocessor and more precisely a microcontroller with a non-volatile memory and few hardware components.
- the latter comprise a voltage regulator for operating the microcontroller, a few active electronic components and finally the exhaust gas probe 2.
- the evaluation unit 211 has an impedance converter for adapting the high-resistance signals of the exhaust gas probe 2 to the impedance of an analog / digital converter integrated in the microcontroller on.
- the signals to be output at the interface 21 to the connecting lines 22 are measured again via a digital / analog converter in order to generate control signals for the operation of the exhaust gas probe and a reference signal.
- the evaluation unit 211 further comprises a generator for generating a test signal, which is used for the indirect determination of the probe temperature by determining the probe impedance.
- the evaluation unit 211 comprises a power component for controlling the heating of the exhaust gas probe by means of pulse width modulation (PWM).
- PWM pulse width modulation
- Power component the pulse width so that the probe temperature remains within the permissible operating range. This is typically 750 ° C to 850 ° C for a nitrogen oxide probe.
- a mating connector 12 connects the interface 21 designed as a connector to an energy source and via a system bus 111 to the engine control unit 1.
- the system bus 111 is designed as a CAN bus.
- Digital signals or pulse-width-modulated (PWM) signals which are regarded as digital signals in the sense of the invention, are output at the interface 21.
- PWM pulse-width-modulated
- Exhaust gas probe 2 can be easily guided over longer distances in an engine compartment of a motor vehicle.
- the electronics are permanently highly accurate.
- manufacturing data of the exhaust gas probe 2 can be stored in the working memory of the microprocessor in order to correct the measurement and control variables.
- connecting lines 11 to the engine control unit can be significantly reduced.
- connecting lines for the probe heating can be dispensed with.
- Two connecting lines 11 are sufficient as a system bus.
- several units consisting of sensors with evaluation units can be connected to a single system bus.
- the evaluation units must each have a bus controller. This function can be performed by the microprocessor of the evaluation unit 211.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Electric Motors In General (AREA)
- Exhaust Silencers (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19807215A DE19807215C2 (en) | 1998-02-20 | 1998-02-20 | Control system for an internal combustion engine |
DE19807215 | 1998-02-20 | ||
PCT/DE1999/000100 WO1999042717A1 (en) | 1998-02-20 | 1999-01-18 | Control system for internal combustion engine comprising a sensor and an interface for digitising measurement values |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1056942A1 true EP1056942A1 (en) | 2000-12-06 |
EP1056942B1 EP1056942B1 (en) | 2002-08-28 |
Family
ID=7858437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99934326A Expired - Lifetime EP1056942B1 (en) | 1998-02-20 | 1999-01-18 | Control system for internal combustion engine comprising a sensor and an interface for digitising measurement values |
Country Status (10)
Country | Link |
---|---|
US (1) | US7050902B1 (en) |
EP (1) | EP1056942B1 (en) |
JP (1) | JP2002504648A (en) |
KR (1) | KR100687960B1 (en) |
CN (1) | CN1114755C (en) |
BR (1) | BR9908092A (en) |
CA (1) | CA2321501A1 (en) |
DE (2) | DE19807215C2 (en) |
ES (1) | ES2183580T3 (en) |
WO (1) | WO1999042717A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4153113B2 (en) * | 1998-12-04 | 2008-09-17 | 株式会社デンソー | Gas concentration detector |
DE19859580C2 (en) * | 1998-12-22 | 2001-03-29 | Siemens Ag | Method for operating an exhaust gas sensor in the exhaust system of an internal combustion engine |
EP1477655A1 (en) * | 2003-05-13 | 2004-11-17 | Haldor Topsoe A/S | Process for controlled addition of a reducing agent into nitrogen oxides containing exhaust gas |
DE10328014A1 (en) * | 2003-06-23 | 2005-01-13 | Volkswagen Ag | Drive system for vehicle comprises calculating unit spatially separated from control device and connected to exhaust gas sensors |
US7644576B2 (en) * | 2005-04-25 | 2010-01-12 | Ngk Spark Plug Co., Ltd. | Sensor control device |
DE102005062602A1 (en) | 2005-12-27 | 2007-07-05 | Robert Bosch Gmbh | Control module used in a vehicle comprises a control unit with a closed housing, a connecting unit for coupling a connecting element of an electrical cable and a pressure equalizing unit |
JP4739104B2 (en) * | 2006-04-21 | 2011-08-03 | 日本特殊陶業株式会社 | Sensor control device |
US8370017B2 (en) | 2009-07-13 | 2013-02-05 | Ford Global Technologies, Llc | Smart vehicle sensor |
CN103221649B (en) * | 2010-10-04 | 2015-11-25 | 万国引擎知识产权有限责任公司 | To the diagnosis of the hydrocarbon injection for filter regeneration |
DE102011004492A1 (en) * | 2011-02-22 | 2012-08-23 | Robert Bosch Gmbh | Lambda probe for determining oxygen content in exhaust gas of internal combustion engine, has evaluation unit that controls and evaluates sensor element for driving heating element to digitize measurement signals of sensor element |
DE102018221819A1 (en) * | 2018-12-14 | 2020-06-18 | Robert Bosch Gmbh | Connector and control device for a motor vehicle with a connector |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4214472A (en) * | 1979-01-22 | 1980-07-29 | Ford Motor Company | Exhaust gas oxygen sensor and electrical connector arrangement |
US4337745A (en) * | 1980-09-26 | 1982-07-06 | General Motors Corporation | Closed loop air/fuel ratio control system with oxygen sensor signal compensation |
JPS5797105A (en) * | 1980-12-10 | 1982-06-16 | Nissan Motor Co Ltd | Digital controller for internal combustion engine |
JPS57130842A (en) * | 1981-02-06 | 1982-08-13 | Nippon Denso Co Ltd | Electronic system for mounting on vehicle |
JPS58150864A (en) * | 1982-03-03 | 1983-09-07 | Toyota Motor Corp | Detection of rotational speed of electronically controlled engine |
KR880009387A (en) | 1987-01-30 | 1988-09-15 | 더머 제트.엘 | Smart sensor system for diagnostic monitoring |
JP2555055B2 (en) * | 1987-03-13 | 1996-11-20 | 株式会社日立製作所 | Engine controller |
US4963246A (en) * | 1987-12-14 | 1990-10-16 | Honda Giken Kogyo Kabushiki Kaisha | Oxygen concentration-sensing device |
US5024534A (en) * | 1988-09-27 | 1991-06-18 | Ngk Spark Plug Co., Ltd. | Temperature sensor for use in a spark plug of an internal combustion engine |
DE8910740U1 (en) * | 1989-09-08 | 1989-11-02 | Siemens Ag, 1000 Berlin Und 8000 Muenchen, De | |
US5161087A (en) * | 1990-10-15 | 1992-11-03 | International Business Machines Corporation | Pivotal heat sink assembly |
US5547552A (en) * | 1994-06-20 | 1996-08-20 | Nippondenso Co., Ltd. | Oxygen concentration detecting apparatus |
US5869744A (en) * | 1996-10-18 | 1999-02-09 | Honda Giken Kogyo Kabushiki Kaisha | Oxygen concentration-detecting device for internal combustion engines |
US6254750B1 (en) * | 1997-07-29 | 2001-07-03 | Ecm Engine Control And Monitoring | Exhaust emission sensors |
-
1998
- 1998-02-20 DE DE19807215A patent/DE19807215C2/en not_active Expired - Fee Related
-
1999
- 1999-01-18 WO PCT/DE1999/000100 patent/WO1999042717A1/en active IP Right Grant
- 1999-01-18 US US09/622,696 patent/US7050902B1/en not_active Expired - Lifetime
- 1999-01-18 KR KR1020007009093A patent/KR100687960B1/en not_active IP Right Cessation
- 1999-01-18 EP EP99934326A patent/EP1056942B1/en not_active Expired - Lifetime
- 1999-01-18 CA CA002321501A patent/CA2321501A1/en not_active Abandoned
- 1999-01-18 CN CN99801878A patent/CN1114755C/en not_active Expired - Lifetime
- 1999-01-18 ES ES99934326T patent/ES2183580T3/en not_active Expired - Lifetime
- 1999-01-18 BR BR9908092-3A patent/BR9908092A/en not_active IP Right Cessation
- 1999-01-18 JP JP2000532632A patent/JP2002504648A/en active Pending
- 1999-01-18 DE DE59902462T patent/DE59902462D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9942717A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2321501A1 (en) | 1999-08-26 |
ES2183580T3 (en) | 2003-03-16 |
CN1114755C (en) | 2003-07-16 |
US7050902B1 (en) | 2006-05-23 |
BR9908092A (en) | 2000-10-31 |
EP1056942B1 (en) | 2002-08-28 |
DE59902462D1 (en) | 2002-10-02 |
DE19807215C2 (en) | 2000-06-08 |
WO1999042717A1 (en) | 1999-08-26 |
CN1287591A (en) | 2001-03-14 |
DE19807215A1 (en) | 1999-08-26 |
KR100687960B1 (en) | 2007-02-27 |
JP2002504648A (en) | 2002-02-12 |
KR20010041056A (en) | 2001-05-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1056942B1 (en) | Control system for internal combustion engine comprising a sensor and an interface for digitising measurement values | |
DE2938322C2 (en) | Hot wire measuring device for recording the intake air of an internal combustion engine | |
EP0889213B1 (en) | Sensor arrangement and motor control for an internal combustion engine | |
DE3905824C2 (en) | ||
EP2318852B1 (en) | Monitoring system for an accumulator | |
EP1302755B1 (en) | Sensor | |
DE102016114141A1 (en) | Air flow rate measuring device | |
DE112011103179T5 (en) | Capacitive occupant detection system | |
DE102007007079B4 (en) | Detection device and engine control unit | |
DE4011950C2 (en) | Control device for an internal combustion engine | |
DE2809023A1 (en) | DIGITAL COMPUTER FOR ELECTRONIC INJECTION | |
WO2001035065A1 (en) | Method for testing the performance and/or adjustment of an exhaust gas temperature sensor | |
US5645352A (en) | Circuit configuration and method for ascertaining the temperature of a current-regulated electrical coil | |
DE10123627B4 (en) | Sensor device for detecting a mechanical deformation of a component in the automotive field | |
DE3506615A1 (en) | CONTROL DEVICE FOR AN INTERNAL COMBUSTION ENGINE | |
DE102006052657A1 (en) | Electronic control device for vehicle engine, has correction execution unit, which corrects digitally changed voltage value based on output voltage of constant voltage current supply circuit, and conversion processing data | |
DE4341390A1 (en) | Sensor signal processing circuit, e.g. for exhaust probe in motor vehicle | |
DE102017220147A1 (en) | TEMPERATURE MEASURING DEVICE | |
EP1073880A2 (en) | Device for radiometric sensor signal measurement | |
DE4338018C2 (en) | Circuit arrangement for the transmission of signals | |
DE4115288A1 (en) | Balancing arrangement for signals from e.g. combustion oximeter - uses fixed and adjustable resistors having good thermal coupling and equal and opposite dependence on temp. | |
WO2002052138A2 (en) | Device for determining the flow rate of a flowing medium | |
EP4143515A1 (en) | Sensor array for a fluid, fluid tank and use of the sensor array | |
EP0751377A1 (en) | Mass flow determination device | |
DE112021004518T5 (en) | Physical quantity detection device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20000417 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT SE |
|
17Q | First examination report despatched |
Effective date: 20010704 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT SE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20020828 |
|
REF | Corresponds to: |
Ref document number: 59902462 Country of ref document: DE Date of ref document: 20021002 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2183580 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20030530 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20040113 Year of fee payment: 6 Ref country code: GB Payment date: 20040113 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20040114 Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050118 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050118 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050119 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050119 |
|
EUG | Se: european patent has lapsed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20050118 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20050119 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20180131 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20180119 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 59902462 Country of ref document: DE |