EP0965742A1 - Verfahren zum Unterscheiden einer Leitungsunterbrechung und einer Leitungsbeeinträchtigung bei der Ermittlung einer Pedalstellung in einem Kraftfahrzeug - Google Patents
Verfahren zum Unterscheiden einer Leitungsunterbrechung und einer Leitungsbeeinträchtigung bei der Ermittlung einer Pedalstellung in einem Kraftfahrzeug Download PDFInfo
- Publication number
- EP0965742A1 EP0965742A1 EP99111694A EP99111694A EP0965742A1 EP 0965742 A1 EP0965742 A1 EP 0965742A1 EP 99111694 A EP99111694 A EP 99111694A EP 99111694 A EP99111694 A EP 99111694A EP 0965742 A1 EP0965742 A1 EP 0965742A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pedal
- measured value
- value
- flag
- vehicle
- 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
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000006735 deficit Effects 0.000 title claims description 14
- 238000011156 evaluation Methods 0.000 claims abstract 4
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims 3
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 239000003550 marker Substances 0.000 abstract 1
- 230000003252 repetitive effect Effects 0.000 abstract 1
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
Images
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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
- F02D11/107—Safety-related aspects
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2086—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures
- F02D2041/2089—Output circuits, e.g. for controlling currents in command coils with means for detecting circuit failures detecting open circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
- F02D2400/08—Redundant elements, e.g. two sensors for measuring the same parameter
Definitions
- the invention relates to a method for distinguishing one Line interruption and line impairment the determination of a pedal position in a motor vehicle.
- Electronic accelerator pedals are increasingly being used in motor vehicles used to control the engine speed. For redundancy reasons the pedal is equipped with two pedal sensors, whose Measured values can be evaluated separately. There are certain Deviations are permitted and are made using appropriate algorithms balanced. For example, a channel falls completely off, the second channel for determining the Driver request can be consulted.
- the invention has for its object a method for Distinguish between a line break and a line impairment when determining a pedal position in to specify a motor vehicle.
- a measured value or - given by a pedal value transmitter with the usual use of two pedal sensors - both Measured values outside a specified value range, for example at 0 V, becomes a flag for a line impairment evaluated. This flag stores whether a line impairment occurred earlier, for Example due to high impedances on the conductor tracks of the Pedal encoder, has been recognized.
- the flag is set, i. H. a line impairment earlier has been recognized, the movement of the vehicle monitored. It turns out that Vehicle is started from standstill, although the Pedal value readings still out of range lie, it can be concluded that the driver tries to move the vehicle at idle speed put. This is interpreted as the driver's request that Moving vehicle. But since no correct measured value from the Pedal encoders are detected, is due to a line break infered. There is then no high impedance more so that the flag is reset.
- the knowledge gained through the process used to a normal or an increased idle speed adjust. Basically, this is the normal one Idle speed set if no other driver request is recognized. If the pedal reading (s) are outside of the value range and the flag for high impedance is not set, for example, a line break accepted by cable break. If found then the vehicle stops and the driver releases the brakes, is concluded on a driving request. To improve Ensure emergency running properties and the vehicle more comfortable being able to move becomes an increased idle speed of the engine. If the driver during the If the brake is applied, the engine speed will increase lowered the normal idle. When the brake is released again the engine speed increases to the increased idle speed. This enables the driver to drive the vehicle without outside help to drive to the next workshop.
- the usual steps are A1 Pedal values given by two pedal value transmitters with one predetermined range of values compared. Are the two pedal values outside, especially below, the value range, is checked in a step A2 whether already during an earlier trip of the vehicle a line impairment in the form of high impedance due to trace deposits determined on the potentiometers of the pedal sensors has been.
- the first step is A3 a line break, for example due to a cable break or a plug drop accepted. Then it will the corresponding driving behavior set, namely in particular an increased idle speed when the driver is through Release of the brake has indicated that he is the vehicle want to move.
- step A4 it is monitored whether in the meantime a pedal value is detected within the range of values can be. As long as this is not the case, Step A3 maintain acceptance of a line break. Otherwise, the process identifies in one Step A5 a high impedance in the pedal value sensors, so that it in the next procedural cycle - as soon as the pedal values in Step A1 are again below the value range - to one Step A6 arrives. Now one is for driving unproblematic line impairment in the form of a High resistance accepted. Accordingly, the driving behavior according to the desire of the driver who is obviously in at this moment the pedal is not pressed, to normal idle speed set.
- step A7 it is noticed that the vehicle is in Movement is offset without a corresponding driver request determined by a pedal value within the value range could turn up in step A8 concluded a line break.
- the flag for the high impedance is reset so that the process in next cycle returns to step A3.
- step B1 it is determined that both pedal sensor voltages V_PVS_1 and V_PVS_2 0 V or a low one Voltage value below the usual measuring range (e.g. 1 to 4 V).
- step B2 a serving as a flag for a line impairment Bit LV_PVS_H_R_ is checked.
- This bit is originally d. H. set to 0 when leaving the factory or a workshop. It becomes non-volatile in one after each engine run EEPROM saved and read with every restart. The bit is - as will be explained later - set to 1 if A high impedance was found in the pedal sensors is.
- step B2 It is determined in step B2 that the bit has not yet been set is the pedal value voltages V_PVS_1 and V_PVS_2 continues to be monitored, with at least one debounce time in one Step B3 is waited for short-term voltage fluctuations to be disregarded. If during the Monitoring of the pedal value voltages determined in a step B4 is that one of the pedal value channels PV_AV_1 or PV_AV_2 leaves the idling range (0%), a driver request be recognized. It is concluded that the pedal encoder high impedance due to trace deposits have, but are otherwise functional. To this The purpose of the bit LV_PVS_H_R is 1 in a step B5 set.
- a brake light switch and a brake test switch supervised.
- a bit LV_BLS becomes 1 set, while a bit when the brake test switch is actuated LV_BTS is set to 1.
- a change of the two bits LV_BLS and LV_BTS from 1 to 0 means that the brake is initially active and has subsequently become inactive, d. that is, the driver the brake was first applied and then no longer applied Has.
- step B6 If it is also recognized in step B6 that the vehicle speed VS_FIL is less than 1 km / h, ie that the vehicle is stationary, an increased idling speed IS_H is set in a step B7. B. may be 1,200 min -1 . Otherwise, the normal idling speed IS is set in a step B8. If the driver actuates the brake at a later time, the setting of one of the bits LV_BLS or LV_BTS is registered in a step B9. The idle speed is then reduced to the normal speed IS in a step B10. If no brake actuation is detected in step B9, the increased idling speed is maintained in step B11.
- step B2 If it is determined in step B2 that earlier High resistance on the pedal value sensors is assumed that the pedal is now in neutral again stent and it is accordingly the driver request that the Engine rotates at normal idle speed. In one step B12 is therefore set to the normal idle speed.
- step B13 it is monitored in a step B13 whether the Vehicle is started, d. H. whether the vehicle speed VS_FIL from less than 1 km / h to more than 10 km / h increased, although both pedal value voltages V_PVS_1 and v_PVS_2 are at 0 V and the brake is not actuated, d. H. both brake bits LV_BLS and LV_BTS are set to 0.
- Step B14 the flag LV_PVS_H_R reset so that the procedure in the next cycle to the left branch seen in FIG steps B3 and B6 and so on. Steps B13 and B14 therefore represent a kind of self-diagnosis in which a previously recognized state of high impedance in a diagnosis a line break can be converted.
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)
Abstract
Description
Claims (6)
- Verfahren zum Unterscheiden einer Leitungsunterbrechung und einer Leitungsbeeinträchtigung bei der Ermittlung einer Pedalstellung in einem Kraftfahrzeug, mit den Schrittena) wiederholtes Auswerten von wenigstens einem von wenigstens einem Pedalwertgeber ausgegebenen Meßwert, und, wenn der Meßwert außerhalb eines vorgegebenen Wertebereichs liegt,b) Auswerten eines Merkers für eine Leitungsbeeinträchtigung und,c1) wenn der Merker gesetzt ist, Überwachen einer Fahrzeugbewegung und, wenn ein Ingangsetzen des Fahrzeugs aus dem Stillstand festgestellt wird und der Meßwert weiterhin außerhalb des Wertebereichs liegt, Rücksetzen des Merkers und Feststellen einer Leitungsunterbrechung; oderc2) wenn der Merker nicht gesetzt ist, weiterhin wiederholtes Auswerten des Meßwerts des Pedalwertgebers, und, wenn ein Meßwert des Pedalwertgebers innerhalb des Wertebereichs liegt, Setzen des Merkers.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß nach dem Schritt a) eine Brennkraftmaschine des Kraftfahrzeugs auf eine normale Leerlaufdrehzahl eingestellt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß,wenn durch Auswerten des Meßwerts festgestellt wird, daß der Meßwert außerhalb des Wertebereichs liegt,und durch Auswerten des Merkers festgestellt wird, daß der Merker nicht gesetzt ist,und durch Überwachen der Fahrzeugbewegung festgestellt wird, daß das Fahrzeug steht,und durch durch Überwachen einer Fahrzeugbremse festgestellt wird, daß die Fahrzeugbremse gelöst wird,dann wird die Brennkraftmaschine auf eine erhöhte Leerlaufdrehzahl eingestellt.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß, die Brennkraftmaschine auf eine normale Leerlaufdrehzahl eingestellt wird, solange die Bremsbetätigung festgestellt wird, wenn nach dem Einstellen der erhöhten Leerlaufdrehzahl durch Überwachen der Bremse festgestellt wird, daß die Bremse betätigt wird.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß zwei Pedalwertgeber vorgesehen sind, die jeweils einen Meßwert liefern.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß zum Erfüllen der Verfahrensbedingung, daß ein Meßwert außerhalb des Wertebereichs liegt, jeweils beide Meßwerte nicht in dem Wertebereich liegen dürfen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19826589A DE19826589A1 (de) | 1998-06-15 | 1998-06-15 | Verfahren zum Unterscheiden einer Leitungsunterbrechung und einer Leitungsbeeinträchtigung bei der Ermittlung einer Pedalstellung in einem Kraftfahrzeug |
DE19826589 | 1998-06-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0965742A1 true EP0965742A1 (de) | 1999-12-22 |
EP0965742B1 EP0965742B1 (de) | 2003-08-20 |
Family
ID=7870923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99111694A Expired - Lifetime EP0965742B1 (de) | 1998-06-15 | 1999-06-15 | Verfahren zum Unterscheiden einer Leitungsunterbrechung und einer Leitungsbeeinträchtigung bei der Ermittlung einer Pedalstellung in einem Kraftfahrzeug |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0965742B1 (de) |
DE (2) | DE19826589A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4004083A1 (de) * | 1990-02-10 | 1991-08-14 | Bosch Gmbh Robert | System zur steuerung und/oder regelung einer brennkraftmaschine |
DE4004086A1 (de) * | 1990-02-10 | 1991-08-14 | Bosch Gmbh Robert | System zur steuerung bzw. regelung einer brennkraftmaschine in einem kraftfahrzeug |
US5113823A (en) * | 1990-04-06 | 1992-05-19 | Nissan Motor Company, Limited | Throttle valve control apparatus for use with internal combustion engine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3812762A1 (de) * | 1988-04-16 | 1989-10-26 | Vdo Schindling | Verfahren und anordnung zur ueberwachung eines istwertgebers |
DE4235880C2 (de) * | 1992-10-23 | 2003-07-17 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Erfassung einer veränderlichen Größe bei Fahrzeugen |
DE4336038A1 (de) * | 1993-10-22 | 1995-04-27 | Vdo Schindling | Verfahren zum Betreiben einer Drosselklappen-Verstelleinrichtung |
-
1998
- 1998-06-15 DE DE19826589A patent/DE19826589A1/de not_active Withdrawn
-
1999
- 1999-06-15 EP EP99111694A patent/EP0965742B1/de not_active Expired - Lifetime
- 1999-06-15 DE DE59906639T patent/DE59906639D1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4004083A1 (de) * | 1990-02-10 | 1991-08-14 | Bosch Gmbh Robert | System zur steuerung und/oder regelung einer brennkraftmaschine |
DE4004086A1 (de) * | 1990-02-10 | 1991-08-14 | Bosch Gmbh Robert | System zur steuerung bzw. regelung einer brennkraftmaschine in einem kraftfahrzeug |
US5113823A (en) * | 1990-04-06 | 1992-05-19 | Nissan Motor Company, Limited | Throttle valve control apparatus for use with internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
DE19826589A1 (de) | 1999-12-23 |
EP0965742B1 (de) | 2003-08-20 |
DE59906639D1 (de) | 2003-09-25 |
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