EP0679221B1 - Elektronische zählerschaltung zur zeitlichen vermessung eines digitalen signals - Google Patents
Elektronische zählerschaltung zur zeitlichen vermessung eines digitalen signals Download PDFInfo
- Publication number
- EP0679221B1 EP0679221B1 EP94929459A EP94929459A EP0679221B1 EP 0679221 B1 EP0679221 B1 EP 0679221B1 EP 94929459 A EP94929459 A EP 94929459A EP 94929459 A EP94929459 A EP 94929459A EP 0679221 B1 EP0679221 B1 EP 0679221B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- counter
- events
- event
- gate
- group
- 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.)
- Expired - Lifetime
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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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- 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
- F02D41/2403—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially up/down counters
Definitions
- the invention relates to an electronic counter circuit for the time measurement of a digital Signals of any periodic waveform, where the digital signal from a series of groups periodic events exist, according to Claim 1, 1st part.
- the counting function is used by creating an event-dependent clock frequency to the input one to the counter circuit belonging counter triggered and counts with a event-independent counting frequency. Unless an event evaluation gate logic will take place upstream, with the individual clock pulses can be specifically hidden. This will achieved that the counter is correspondingly slower counts and thus an event-dependent evaluation of the Meter reading is possible.
- the electronic counter circuit with the in the claim 1 mentioned features in contrast has the Advantage that a time measurement of a digital Signals of any periodic waveform with simple, easy-to-implement circuit modules is possible.
- the fact that a first counter is counted with a counting cycle which put through for a time only by a gate logic is that by a first event and determines a last event of an event group will and more between these events lying events are hidden, it is very advantageous possible after a first time Synchronization of the counter circuit independently almost any periodic digital signal without further Process interventions after initialization and at the same time, even with eventual faulty signals, a current meter reading specify the actual length of the straight corresponding digital signal.
- Figure 1 is the example of a segment encoder a camshaft of a six-cylinder internal combustion engine the possible course of a digital signal shown.
- a segment signal generator On a camshaft of the internal combustion engine a segment signal generator is arranged, that has segments distributed over the circumference. It an event period P is shown, within which detects a certain number of events E. becomes. The events E are thereby positive and negative edges of those on the encoder wheel arranged segments by a suitable sensor detection generated.
- everyone is on the donor wheel six cylinders Z1 to Z6 one segment or one Assigned segment gap. So through the assignment the events E1 to E4 of the first cylinder Z1 characterized.
- the occurrence of the event E1 can be a Control not shown here, for example an ignition control that the cylinder Z1 concerns are triggered.
- E4 and E5 become the cylinder in the same way Z2 characterized and the other cylinders by the corresponding ones caused by the segments Events.
- the one to be assigned to a cylinder Events form an event group. Since both the 360 ° as well as the 720 ° angle of the camshaft are in at least two of the cylinders assigned segments or segment gaps at least to detect an intermediate event, here E2 and E3, so that the 360 ° and 720 ° angle differentiated can be.
- FIG 2 is an electronic counter circuit shown, which has a counter 10, which is counted with a counting cycle C2 at input 12 becomes.
- the counting cycle C2 is controlled by a counter 14, the one with the number of events E dependent counting cycle t0 is counted and one Gate logic 16 and an external counter clock tl generated. It is thus achieved that through the influence of the control signal C1 of the counter 10 one certain change in the meter reading of his meter reading Q2 experiences so that over the known external counter clock tl and the difference between the Counter reading Q2 at the start of the control signal C1 and closed at the end of the control signal C1 can be in which the control signal C1 is present.
- the counter 14 counts the events E, starting with an external synchronization signal t3.
- the external synchronization signal t3 can taking suitable measures on the segment encoder wheel the camshaft at the same time as the event E1 can be detected.
- the synchronization signal t3 sets the counter 14 to one Reset value, which is preferably zero. Starting the counter starts from this reset value 14 the number of events during the event period Count P.
- the number of expected Events E during the event period P is that Counter 14 is known as value D1.
- the meter reading of the counter 14 is in the gate logic 16th read in depending on the meter reading provides the counter clock C2. Since the counter clock C2 should only be relevant for the time in which the digital Signal S for a cylinder Z or one Segment should be in are shown in Figure 1 Example to hide events E2 and E3.
- FIG. 3 shows a variant of the masking of events E2 and E3 clarified. Same Parts as in Figure 2 are given the same reference numerals provided and not explained again here.
- the number of expected events E will be here from a register 18 in the form of the value D1 to the Counter 14 provided.
- the counter 14 the number begins with the synchronization signal t3 of events E caused by the clock frequency t0 is given to count.
- the one with everyone Occurrence of a next event E changing Counter reading Q1 of counter 14 is stored in a table 20 taken over. Table 20 is for example as read-only memory or programmable Memory executed.
- the gate logic 16 then forms from the external counter clock t1 and control signal C1 Counting cycle C2, so that the counter 10 corresponds to the the information given to the control signal C1 Value range.
- the range of values traversed is then available as counter reading Q2 and can for example become a cylinder-dependent Control, in particular an ignition timing control, or a valve control can be used.
- over the synchronization signal t3 and the register 18 is a cyclical repeatability of the time measurement of the individual segments within the event period P guaranteed.
- FIG. 4 shows a further variant of a possibility which is not a segment time determination hide required events E2 and E3.
- the same parts as in Figure 1 are again with provided the same reference numerals and not again explained.
- the table 20 is here by a Relative memory 22 replaced, the function of Table 20 and a comparator 24 at the same time takes over, that is, the changing meter reading Q1 of the counter 14 the respective segments the cylinder assigns Z. This makes it possible to dispense with the synchronization signal t3.
- FIG. 5 shows a further variant of the blanking that is not required to determine the segment time Events E2 and E3 shown.
- the value D1 the number of expected events E is here provided from a table 26 in which the Counter reading Q3 of a counter 28 is read.
- Table 26 divides counter 14 into the number of the events to be omitted E in that of the Occurrence of the events E dependent counting cycle t0 With.
- the counter 14 thus counts those to be omitted Events internally with, without its counter reading Q1 to change and changes this only when omitted the corresponding number of events is.
- the counter 28 is here by a Control signal C3 fed back so that this Counter reading Q3 according to the number of actually events E can change.
- the number of expected events within an event period P or an event group the counter 28 becomes the value D3 from a register 30 read.
- the counter 28 counts the event group and divides the counter reading Q3 Table 26 with how many events in the current omitted event group.
- each periodic digital sensor signal S without further intervention after initial initialization by the Process synchronization signal t3 independently can.
- the Table 20 or the relative memory 22 can be a Most of the possible signal errors from the event clock t0 and the synchronization signal t3 filtered out will. Incorrect signals despite reach the meter circuit after the plausibility check, do little harm as individual Error after the next synchronization at the latest corrected by register 18 or 30 will. Furthermore, a quick detection of a possible failure of the event clock t0 a resulting counter overflow of the Counter 10 possible.
- the invention can be, for example, in the following two Use cases are used.
- the external Counting cycle tl counted with a fixed predetermined frequency, where at the end of each segment Z1, Z2, ..., Z6 (cf. Fig. 1) the counter reading Q2 of the temporal length corresponds to this segment.
- the gate logic 16 modified so that the counter clock C2 such is varied that the counter 10 at the end of each Segments Z1, Z2, ..., Z6 (see FIG. 1) one each predetermined value reached.
- the regulation of this Counting clock happens according to the well-known PLL principle (Phase locked loop).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Unknown Time Intervals (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Description
- Figur 1
- eine Übersicht eines möglichen digitalen Signals;
- Figur 2
- ein Blockschaltbild einer zeitlichen Vermessung eines digitalen Signals;
- Figur 3
- ein Blockschaltbild einer ersten Ausführungsvariante der Figur 2;
- Figur 4
- ein Blockschaltbild einer zweiten Ausführungsvariante der Figur 2 und
- Figur 5
- ein Blockschaltbild einer dritten Ausführungsvariante der Figur 2.
Claims (6)
- Elektronische Zählerschaltung zur zeitlichen Vermessung eines digitalen Signals beliebiger periodischer Signalform, wobei das digitale Signal aus Gruppen von periodischen Ereignissen besteht, wobei ein erster Zähler (10) mit einem Zähltakt T1 gezählt wird, der durch eine Gatterlogik (16) nur für die Zeit durchgestellt wird, die durch ein erstes Ereignis (E1) und ein letztes Ereignis (E4) einer Ereignisgruppe bestimmt wird und weitere zwischen diesen Ereignissen (E1; E4) liegende Ereignisse (E2; E3) ausgeblendet werden, dadurch gekennzeichnet, daß die Gruppen unterschiedliche Anzahlen von Ereignissen zwischen dem ersten und dem letzten Ereignis aufweisen, daß Mittel vorgesehen sind denen die Zahl der Ereignisse jeder Gruppe bekannt ist und die daraus das erste und letzte Ereignis jeder Gruppe ermitteln, daß die Mittel durch die Gatterlogik (16) dem ersten Zähler (10) zwischen dem ersten und dem letzten Ereignis jeder Gruppe den Zähltakt T1 zuführen, und daß beim letzten Ereignis jeder Gruppe eine Zwischenspeicherung des Zählerstandes des ersten Zählers (10) erfolgt.
- Schaltung nach Anspruch 1, dadurch gekennzeichnet, daß die Gatterlogik (16) ein Und-Gatter aufweist, daß ein Eingang des ersten Zählers (10) mit dem Ausgang des Und-Gatters (16) verbunden ist, daß an dem Und-Gatter (16) an einem ersten Eingang ein erstes Signal C1 und an einem zweiten Eingang der Zähltakt T1 angelegt wird, daß am Ausgang des Und-Gatter (16) ein Signal anliegt wenn an beiden Eingängen ein Signal anliegt, und wobei das erste Signal zwischen dem ersten und letzten Ereignis einer Gruppe anliegt.
- Schaltung nach Anspruch 2, dadurch gekennzeichent, daß der erste Eingang des Und-Gatters (16) mit einer Teilschaltung verbunden ist, daß die Teilschaltung einen zweiten Zähler (14) aufweist , daß die Teilschaltung einen Speicher aufweist, in dem die Zahl der Ereignisse jeder Gruppe gespeichert sind, daß der zweite Zähler die Ereignisse zählt und wobei die Teilschaltung weitere Mittel aufweist, die in Abhängigkeit von der gespeicherten Zahl der Ereignisse jeder Gruppe und dem jeweiligen Zählerwert im zweiten Zähler das erste Signal am ersten Eingang des Und-Gatters (16) anlegen.
- Schaltung nach Anspruch 3, dadurch gekennzeichent, daß die weiteren Mittel der Teilschaltung eine Tabelle aufweisen in dem jedem Zählerwert des zweiten Zähler (14) ein Ausgangswert zugeordnet ist, und wobei der Ausgangswert der Tabelle auf den Eingang des Und-Gatters (16) gegeben wird.
- Schaltung nach Anspruch 3, dadurch gekennzeichent, daß die weiteren Mittel der Teilschaltung einen Relativspeicher und einen Vergleicher aufweisen, die jedem Zählerwert des zweiten Zähler (14) einen Ausgangswert zuordnen, und daß der Ausgangswert auf den ersten Eingang des Gatters gegeben wird.
- Schaltung nach Anspruch 3, dadurch gekennzeichent, daß die weiteren Mittel der Teilschaltung einen dritten Zähler (28) aufweisen, dessen Zählerstand eine Information über die jeweilige Gruppe enthält, wobei dieser Zählerstand an eine Tabelle weitergegeben wird, die jeder Gruppe eine Anzahl von auszulassenden Ereignissen zuordnet und die Anzahl von auszulassenden Ereignissen an den zweiten Zähler (14) übergibt, der eine entsprechende Anzahl von Ereignissen ausläßt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4336390A DE4336390A1 (de) | 1993-10-26 | 1993-10-26 | Elektronische Zählerschaltung zur zeitlichen Vermessung eines digitalen Signals |
DE4336390 | 1993-10-26 | ||
PCT/DE1994/001198 WO1995012063A1 (de) | 1993-10-26 | 1994-10-12 | Elektronische zählerschaltung zur zeitlichen vermessung eines digitalen signals |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0679221A1 EP0679221A1 (de) | 1995-11-02 |
EP0679221B1 true EP0679221B1 (de) | 1998-04-08 |
Family
ID=6500976
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94929459A Expired - Lifetime EP0679221B1 (de) | 1993-10-26 | 1994-10-12 | Elektronische zählerschaltung zur zeitlichen vermessung eines digitalen signals |
Country Status (5)
Country | Link |
---|---|
US (1) | US5684757A (de) |
EP (1) | EP0679221B1 (de) |
JP (1) | JP3759605B2 (de) |
DE (2) | DE4336390A1 (de) |
WO (1) | WO1995012063A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6621767B1 (en) * | 1999-07-14 | 2003-09-16 | Guide Technology, Inc. | Time interval analyzer having real time counter |
JP3506116B2 (ja) * | 2000-01-27 | 2004-03-15 | 株式会社デンソー | エンジン制御装置 |
FI112904B (fi) * | 2001-06-29 | 2004-01-30 | Nokia Corp | Menetelmä suojata elektroninen laite ja elektroninen laite |
US6796292B2 (en) * | 2003-02-26 | 2004-09-28 | Ford Global Technologies, Llc | Engine air amount prediction based on engine position |
US6895932B2 (en) * | 2003-02-26 | 2005-05-24 | Ford Global Technologies, Llc | Synchronized cylinder event based spark |
US6931840B2 (en) * | 2003-02-26 | 2005-08-23 | Ford Global Technologies, Llc | Cylinder event based fuel control |
US6701895B1 (en) * | 2003-02-26 | 2004-03-09 | Ford Global Technologies, Llc | Cylinder event based spark |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2640791A1 (de) * | 1976-09-10 | 1978-03-16 | Bosch Gmbh Robert | Anordnung zur erzeugung von steuersignalen, insbesondere fuer die ausloesung von zuend- und einspritzvorgaengen bei brennkraftmaschinen |
FR2428152B1 (fr) * | 1978-06-07 | 1987-04-10 | Bosch Gmbh Robert | Dispositif pour la commande de processus fonction de parametres de marche et repetitifs pour moteurs a combustion interne |
US4245605A (en) * | 1979-06-27 | 1981-01-20 | General Motors Corporation | Acceleration enrichment for an engine fuel supply system |
JPS58106464A (ja) * | 1981-12-21 | 1983-06-24 | Advantest Corp | グリツチ検出測定器 |
US5311771A (en) * | 1992-03-30 | 1994-05-17 | Caterpillar Inc. | Method for determining the rotational position of a crankshaft of an internal combustion engine |
-
1993
- 1993-10-26 DE DE4336390A patent/DE4336390A1/de not_active Withdrawn
-
1994
- 1994-10-12 DE DE59405643T patent/DE59405643D1/de not_active Expired - Fee Related
- 1994-10-12 US US08/454,110 patent/US5684757A/en not_active Expired - Fee Related
- 1994-10-12 EP EP94929459A patent/EP0679221B1/de not_active Expired - Lifetime
- 1994-10-12 JP JP51234295A patent/JP3759605B2/ja not_active Expired - Fee Related
- 1994-10-12 WO PCT/DE1994/001198 patent/WO1995012063A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DE59405643D1 (de) | 1998-05-14 |
DE4336390A1 (de) | 1995-04-27 |
EP0679221A1 (de) | 1995-11-02 |
US5684757A (en) | 1997-11-04 |
WO1995012063A1 (de) | 1995-05-04 |
JP3759605B2 (ja) | 2006-03-29 |
JPH08506401A (ja) | 1996-07-09 |
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