GB2134265A - Generating rotational speed data for an internal combustion engine - Google Patents
Generating rotational speed data for an internal combustion engine Download PDFInfo
- Publication number
- GB2134265A GB2134265A GB08400383A GB8400383A GB2134265A GB 2134265 A GB2134265 A GB 2134265A GB 08400383 A GB08400383 A GB 08400383A GB 8400383 A GB8400383 A GB 8400383A GB 2134265 A GB2134265 A GB 2134265A
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- United Kingdom
- Prior art keywords
- data
- speed data
- engine
- rotational speed
- average
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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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/16—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by evaluating the time-derivative of a measured speed signal
-
- 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
- F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/489—Digital circuits therefor
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1413—Controller structures or design
- F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
A rotational speed data generator obtains engine speed data wherein the pulsating component in the speed of an i.c. engine is eliminated. The data generator has a rotational speed sensor outputting a pulse every predetermined rotational angle of a crank shaft of the engine, a circuit for obtaining period data representing the period of generation of the pulse, a circuit responsive to the period data for computing average speed data, a circuit for computing the rate of change with time of the engine speed on the basis of the average speed data, and a circuit for obtaining engine speed data by amending the average speed data according to the rate of change to correct an error of the engine speed represented by the average speed data. Therefore, stable control of the operation of the engine can be realized without degrading the response characteristics by using the engine speed data obtained from the data generator.
Description
SPECIFICATION
Apparatus for generating rotational speed data for an internal combustion engine
This invention relates to an apparatus for generating rotational speed data for an internal combustion engine, and more particularly to an apparatus for generating rotational speed data for an internal combustion engine suitable for obtaining rotational speed data for supply to an electronic speed regulator of the internal combustion engine.
In general, it is necessary to electrically detect the rotational speed of an internal combustion engine to control the operation of the internal combustion engine electronically. The rotational speed data used for this purpose is one of the most important types of data for electronic control of the operation of an internal combustion engine and it is desired to obtained data which accurately represents the actual instantaneous rotational speed for improving the control acuuracy.
The conventional rotational speed data generator which has heretofore been used for this purpose is so arranged that a rotational speed sensor for generating an electrical pulse upon each rotation of the crank shaft of the engine by a predetermined angle is provided so that the rotational speed of the internal combustion engine is detected from the period of the pulse train signal generated from the sensor (e.g. Japanese Laid Open Patent Publication No.
171047/82).
However, a problem arises when an attempt is made to conduct operational control of the internal combustion engine with high accuracy by using the rotational speed data obtained by the conventional rotational speed data generator. the internal combustion engine effects intake, compression, power and exhaust strokes in a given cycle and the speed of the internal combustion engine pulsates periodically because of fluctuations in the angular velocity of the crank shaft caused by the power strokes of the respective pistons. For this reason, when the rotational speed data obtained by the conventional rotational speed data generator is used as it is to regulate the speed of the engine, it is not possible to assure stable operation of the engine and accurate speed control thereof.On the other hand, if the detected data is averaged to eliminate the pulsating component arising in the rotational speed data, there is produced a difference between the rotational speed represented by the average data and the actual rotational speed. Such data, if used for control of the engine, will cause hunting in the operation of the engine speed control and render the control unstable.
It is, therefore, an object of the present invention to provide an improved apparatus for generating rotational speed data for an internal combustion engine.
It is another object of the present invention to provide an apparatus for generating rotational speed data which is capable of producing precise engine speed data suitable for electronically controlling the operation of the internal combustion engine stably without degrading the response characteristics.
According to the present invention, in a rotational speed data generator which generates engine speed data representative of the rotational speed of an internal combustion engine, the rotational speed data generator comprises a rotational speed sensor outputting a pulse every predetermined rotational angle of a crank shaft of the internal combustion engine, means for obtaining a period data representing the period of generation of the pulse in response to a pulse train signal comprised of the pulses, means responsive to the period data for computing an average speed data representing the average speed of the internal combustion engine, means for computing a rate of change with time of the engine speed on the basis of the average speed data, and means for obtaining an engine speed data by amending the average speed data according to the rate of change to corect an error of the engine speed represented by the average speed data.
The invention will be better understood and the other objects and advantages thereof will be more apparent from the ensuing detailed description of a preferred embodiment. taken in conjunction with the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a block diagram of one form of a Diesel engine system provided with a rotational speed data generator of the present invention;
Figure 2A is a graph showing the change in the rotational speed of the Diesel engine;
Figure 2B is the waveform of the pulse train signal of Fig. 1;
Figure 2C is the waveform of the frequency multiplied pulse train signal of Fig. 3;
Figure 3 is a block diagram of a data processor;
Figure 4 is a flow chart of a program for obtaining instantaneous rotational speed data, which is stored in the microcomputer shown in Fig. 3;
Figure 5 is a flow chart of another program for obtaining instantaneous rotational speed data in accordance with the present invention;
Figure 6 is a flow chart of still another program for obtaining instantaneous rotational speed data in accordance with the present invention;;
Figure 7A is a graph showing the change in the rotational speed of the Diesel engine;
Figure 7B is the waveform of the pulse train signal obtained in response to the rotational speed shown in Fig. 7A;
Figure 7C is a view showing the change in rotational speed data; and
Figure 8 is a block diagram of another embodiment of the rotational speed data generator of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Fig. 1 schematically shows a block diagram of one form of a Diesel engine system provided with a rotational speed data generator embodying the present invention. The Diesel engine system 1 comprises a Diesel engine 2 and a fuel injection pump 3 for injecting and supplying fuel into the Diesel engine 2. The crank shaft (not shown) of the Diesel engine 2 has a conventional rotational speed sensor 6 comprises of a gear plate 4 and an electromagnetic pickup coil 5. The rotational speed sensor 6 outputs a pulse train signal S, formed of pulses generated one for every predetermined angle of rotation of the crank shaft.The Diesel engine system 1 further comprises a first sensor 7 for producing a first signal S2 representative of the amount of operation of an accelerator pedal and a second sensor 8 for producing a second signal S3 representing the temperature of the engine coolant of the Diesel engine 2. The pulse train signal S1 and the first and the second signal S2 and S3 are input to a control unit 9 having a microcomputer 10. In response to these input signals, the control unit 9 generates a control signal S4 for positioning a fuel adjusting member 3a for controlling the amount of fuel injected and the control signal S4 is applied to an actuator 14 to which the adjusting member 3a is connected.Thus, the amount of fuel injected is controlled in accordance with the control signal
S4 and the operation control of the internal combustion engine is effected electronically according to a desired governor characteristic.
As the arrangement for controlling the amount of fuel injected in response to the input signals as described above is known, a detailed description thereof is omitted here.
As described above, since the rotational speed of the Diesel engine 2 contains a periodically fluctuating component, the instantaneous rotational speed N shows a substantially sinusoidal fluctuation as illustrated in Fig. 2A. As a result, time intervals T1, T2, T3, . . . at which the pulses
P1, P2, .... . making up the pulse train signal Si output from the rotational speed sensor 6 are generated also fluctuate periodically (Fig. 2B).
To eliminate the influence of the pulsating component appearing in the pulse train signal S, and to produce instantaneous rotational speed data of the actual rotational speed of the engine on the basis of the pulse train signal Si the pulse train signal S, is processed by a data processor 11 (refer to Fig. 3) including the microcomputer 10 provided within the control unit 9.
Fig. 3 is a block diagram of the data processor 11. The pulse train signal S, is input to a measuring circuit 1 2 for measuring the period of the signal S, and the time intervals T1, T2, ..... . of generation of the pulses P1, P2, P3,... comprising the pulse train signal S, as shown in
Fig. 2B are sequentially measured upon each generation of a pulse. The resultant period data T indicating the result of the measurement is input to the microcomputer 1 0 sequentially. The microcomputer 10 stores a program for computing engine speed data NDATA based on the period data T input thereto sequentially.The instantaneous engine speed data NDATA is computed in accordance with the program in synchronization with the generation of the pulses of the pulse train signal Si.
Fig. 4 shows a flow chart of one example of the program for computing the instantaneous engine speed data NDATA. The program shown in Fig. 4 is executed in synchronization with the pulse train signal Si. At step 30, average speed data Mn of the Diesel engine 2 at the time the data Tn is produced is computed according to the following formula:
2 My= (1) Tn~1 +Tn where Tn is the period represented by the period data T determined by the present measurement by the measuring circuit 1 2 and Tun~1 is the period represented by the period data T determined by the preceding measurement. Thus, there is obtained data representing the average engine speed in which the influence of the periodic pulsating component in the rotational speed of the engine is reduced. The value of the engine speed represented by the average speed data M substantially corresponds to the average value of the rotational speed N shown in Fig. 2A.
After the value Mn of the average speed data M is obtained, the variate AN/AT of the engine
speed per unit time is computed at step 40 on the basis of the difference between the value Mn of the presently obtained average speed data M and the value Mn~, of the average speed data
M obtained one step earlier. In short, the variate AN/AT is computed as follows: I\N/I\T = MnMn- 1 (2) The value of AN/AT is multiplied by a constant K, and the value of Mn of the average speed data M and the resultant product is added to the value Mn of the average speed data M to obtain final engine speed data NDATA (step 50).
That is, in step 50, engine speed data NDATA is computed in accordance with the following formula:
AN NDATA = Mn + K1 .Mn M (3) AT
With this arrangement, although the value of the average speed data M obtained at step 30 is an average value and contains a delay factor, the delay factor caused by the average value can be eliminated by adding K,.AN/AT.Mn as a value associated with the time differential amount of the engine speed. Thus, there can be obtained rotational speed information free from the pulsating component of the engine speed and without delay from the actual rotational speed of the engine, so that stable and precise control of the amount of fuel injected can be effected without causing hunting in the rotation of the engine by conducting the control of the amount of fuel injected using the engine speed data NDATA.
Fig. 5 shows a modification of the program shown in Fig. 4. The program of Fig. 5 is a program for executing an operation for obtaining the speed data NDATA asynchronously with the pulse train signal S,. In this case, an interrupt program INT is executed in response to the output of the pulses of the pulse train signal S1. This interrupt program INT executes, upon the generation of each pulse comprising the pulse train signal S1, the operations of stopping a timer (step x,), reading in new period data T from the measuring circuit 1 2 (step x2), setting a flag F for indicating that the new period data is read in (step x3), then starting the timer when the succeeding pulse is output (step x4) and returning to the main program (not shown).
The program for computing the engine speed data NDATA is a program which is formed of the program shown in Fig. 4 and steps 31 and 32 added thereto. After completion of the execution of step 30, whether the flag F has been set or not is discriminated at step 31. If the flag F has been set, the flag F is reset (step 32) to advance to step 40. If the flag F has not been set, i.e., if the value of the period data T is not renewed, step 40 is omitted and step 50 is executed. In other words, in case of an asynchronous type program wherein the program for computing the engine speed data NDATA is executed asynchronously with the pulse train signal S1, whether the period data T has been renewed or not is always monitored by the flag F and only when the period data T has been renewed, step 40 is executed and otherwise the execution of step 40 is omitted.
Since the value of the engine speed data NDATA is renewed upon the generation of each pulse of the pulse train signal S, in the foregoing porgrams, there is a tendency for the difference between the actual rotational speed and the rotational speed indicated by NDATA to be enlarged, and high proportion control cannot be expected in the low speed rotational range of the engine.
Fig. 6 shows the flow chart of an example of a program which can reduce the difference between the actual rotational speed and the rotational speed indicated by NDATA even if the engine speed is relatively low. In the flow chart of Fig. 6, the same steps as in the basic flow chart of Fig. 4 are denoted by the same reference numbers. In the flow chart of Fig. 6, step 60 which discriminates whether or not the value of the average speed data M has been renewed is provided between step 30 and step 40. Only when the result of the discrimination at step 60 is
NO, the procedure advances to step 70 and the engine speed data NDATA is renewed every program cycle using the value of AN/AT even if there is no renewal of the average speed data
M.
More specifically, when a pulse Pn of the pulse train signal S, is output, the new value Mn of the average speed data M is computed at step 30. As a result, the result of the discrimination at step 60 becomes YES so that the computation of AN/AT (step 40) is executed and correction by addition of the differential amount at step 50 is carried out to obtain the instantaneous rotational speed data NDATA indicating the engine speed at that time. In the succeeding program cycle, if the succeeding pulse Pun+1 of the pulse train signal S, has not been output, the result of the discrimination at step 60 becomes NO and step 70 is executed.In step 70 the value of AN/AT, which is obtained by the computation when the pulse Pn is output, is multiplied by a constant K2 and the value Mn of the average speed data M, and the product of the muliplication is added to
NDATA to obtain new NDATA. Thus, the rate of change in the rotational speed of the engine is obtained from the value AN/AT so as to stepwisely change the engine speed data NDATA every program cycle in accordance with the rate of change in the period before the succeeding average speed data value Mn+1 is applied.
When the calculation of the engine speed data NDATA is carried out as described above, under the condition that the engine speed N is varied as shown in Fig. 7A and the pulse train signal S, appears as shown in Fig. 7B, the obtained value of the data NDATA is as shown by the solid line in Fig. 7C according to the program of Fig. 4. However, under the same conditions as described above, according to the program of Fig. 6, the value of the data NDATA obtained at the time of generation of each pulse of the pulse train signal S1 is amended based on the value of AN/AT upon each execution of the program as described above so that the value of NDATA becomes as shown by the broken line in Fig. 7C.Therefore, when the engine is in the low speed range, any large discontinuity in the value of the data NDATA can be suitably interpolated so as to assure smooth control of the amount of fuel injected and contribute to stabilization of the control system.
Although step 70 is provided in the program of Fig. 6 to reduce the influence of the stepwise change in the data NDATA value on the control system, a frequency multiplier 13 may alternatively be provided on the input side of the measuring circuit 1 2 as shown by the dotted line in Fig. 3 to obtain a frequency multiplied signal Sll having, for example, twice as may pulses as those (i.e. a frequency double the frequency) of the pulse train signal S1 as shown in
Fig. 2C so as to increase the number of pulses and accordingly to increase the computing frequency of the engine speed data NDATA.In this case, the average speed value DM1, DM2, ....... may be computed in accordance with the following formulae:
2 DM1 = , T1 +T2 2
DM2 = ~~~
T1' + T2'
2 DM3= T2 + T3
The factor of frequency multiplication of the pulse train signal S1 in the frequency multiplier 1 3 is not limited to two but may be any desired number.
Although the engine speed data obtained by the apparatus for generating rotational speed data according to the present invention is applied to the control of the amount of fuel injected of a Diesel engine in the foregoing embodiments, the present invention is not limited to this embodiment but may also be used to attain rotational speed data of other types of internal combustion engines, such as a gasoline engine. The obtained data may also be used for a purpose other than the control of the amount of fuel injected.
Fig. 8 is a block diagram of another embodiment of the rotational speed data generator of the present invention and the function of this rotational speed data generator corresponds to that of the program shown in Fig. 4.
In Fig. 8, the rotational speed sensor 6 and the measuring circuit 1 2 are the same as those of
Figs. 1 and 3. The period data T from the measuring circuit 1 2 is applied to a register 1 5 which is capable of storing the two last period data Tn~ 1 and Tn. Data T,~, 1 and Tn are applied to a first computing circuit 1 6 in which average speed data M is computed on the basis of the above mentioned formula (1) and the two last average data Mn~1 and Mn are stored in another register 17.These average data Mn~1 and Mn are applied to a second computing circuit 18 in which the variate AN/AT of the engine speed per unit time is calculated in accordance with the formula (2). The computed result of the second computing circuit 1 8 and the data Mn are applied to a third computing circuit 1 9 to compute rotational speed data NDATA in accordance with the formula (3).
According to the present invention, there can be obtained engine speed data wherein the pulsating component in the rotational speed of the internal combustion engine is eliminated and which has no delay from the actual rotational speed of the engine. Therefore, stable control of the operation of the internal combustion engine can be realized without degrading the response characteristics by using the engine speed data obtained by the present invention for the control of the operation of the internal combustion engine.
Claims (9)
1. An apparatus for generating rotational speed data representative of the rotational speed of an internal combustion engine, said apparatus comprising:
a rotational speed sensor for outputting a pulse for each predetermined angle of rotation of the crank shaft of the internal combustion engine;
means for producing period data representing the period of generation of the pulses;
means responsive to the period data for computing average speed data representing the average speed of the internal combustion engine;
means for computing the rate of change with time of the engine speed on the basis of the average speed data; and
means for obtaining engine speed data by correcting said average speed data according to the rate of change to eliminate any error in the engine speed represented by the average speed data.
2. An apparatus as claimed in Claim 1, further comprising a frequency multiplier for obtaining a frequency multiplied signal of the pulse train signal from said rotational speed sensor, the frequency multiplied signal being applied to said period data producing means.
3. An apparatus as claimed in Claim 1 wherein said average speed data computing means computes the average speed data M on the basis of the period data Tn presently produced by said period data producing means and period data Ton~1 which was produced earlier.
4. An apparatus as claimed in Claim 3 wherein said data Tun~1 is data produced one cycle of the pulsation in the engine speed before the data Tn was produced.
5. An apparatus as claimed in Claim 3 wherein said rate computing means computes the rate of change AN/AT with time of the engine speed in accordance with the following formula: AN/AT=Mn MnMn~l wherein: Mn is the presently produced average speed data M, and Mn~1 is average speed data M produced earlier.
6. An apparatus as claimed in Claim 5 wherein the engine speed data NDATA is computed in said engine speed data obtaining means on the basis of the following formula:
AN NDATA = Mn + K1 ZMn K1.
AT
wherein: K1 is a constant.
7. An apparatus for generating a rotational speed data representative of the rotational speed of an internal combustion engine, said apparatus comprising:
a rotational speed sensor for outputting a pulse for each predetermined angle of rotation of the crank shaft of the internal combustion engine;
a first means for producing period data representing the period of generation of the pulses;
a detecting means for detecting the occurrence of the pulses produced from said rotational speed sensor;
a second means responsive to the period data for computing average speed data representing the average speed of the internal combustion engine;
a third means for computing the rate of change with time of the engine speed on the basis of the average speed data only when said detecting means detects the occurrence of a pulse; and
means for obtaining engine speed data by correcting said average speed data according to the rate of change from said third means to eliminate any error in the engine speed represented by the average speed data every predetermined time interval.
8. An apparatus for generating rotational speed data representative of the rotational speed of an internal combustion engine, said apparatus comprising:
a rotational speed sensor for outputting a pulse for each predetermined angle of rotation of the crank shaft of the internal combustion engine;
means for producing period data representing the period of generation of the pulses;
means responsive to the period data for computing average speed data representing the average speed of the internal combustion engine;
means for discriminating whether or not the average speed data has been renewed;
means for computing the rate of change with time of the engine speed on the basis of the average speed data when it is detected that the average speed data has been renewed by said discriminating means; ;
means for obtaining engine speed data by correcting said average speed data according to the rate of change to eliminate any error in the engine speed represented by the average speed data when the data representing the rate of change is output from said rate computing means; and
means for calculating interpolation data for the engine speed data on the basis of the rate of change, the average speed data and the latest engine speed data during the period between the time one renewed average data is provided and the time next renewed average data is provided.
9. An apparatus for generating rotational speed data representative of the rotational speed of an internal combustion engine substantially as hereinbefore described with reference to, and as shown in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP593983A JPS59141750A (en) | 1983-01-19 | 1983-01-19 | Apparatus for generating data relating to speed of rotation of internal-combustion engine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8400383D0 GB8400383D0 (en) | 1984-02-08 |
| GB2134265A true GB2134265A (en) | 1984-08-08 |
| GB2134265B GB2134265B (en) | 1986-08-06 |
Family
ID=11624866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08400383A Expired GB2134265B (en) | 1983-01-19 | 1984-01-09 | Generating rotational speed data for an international combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS59141750A (en) |
| DE (1) | DE3401751A1 (en) |
| GB (1) | GB2134265B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0458775A2 (en) * | 1990-05-23 | 1991-11-27 | Peter Schoeggl | Device for electronic measurement of the rotational speed of internal combustion engines and a method for motor surveillance using this device |
| FR2679338A1 (en) * | 1991-07-20 | 1993-01-22 | Westland Aerostructures Ltd | VEHICLE WHEEL SPEED SENSOR, METHOD FOR PRODUCING MARKING PULSES IN A MEASURING DEVICE AND METHOD FOR MEASURING THE ROTATION SPEED OF A ROTATING OBJECT. |
| GB2346449A (en) * | 1999-02-02 | 2000-08-09 | Caterpillar Inc | Measuring engine speed from an engine speed signature |
| FR2818749A1 (en) * | 2000-12-23 | 2002-06-28 | Bosch Gmbh Robert | PROCESS FOR DETERMINING THE CURRENT ROTATION SPEED OF A MOTOR |
| WO2002070994A2 (en) * | 2001-03-02 | 2002-09-12 | Nissan Motor Co., Ltd. | Rate detection method and rate detector |
| WO2002090998A2 (en) * | 2001-05-09 | 2002-11-14 | Mtu Friedrichshafen Gmbh | Speed filter |
| WO2003023411A1 (en) * | 2001-09-07 | 2003-03-20 | Siemens Aktiengesellschaft | Method for detecting rotational speed |
| WO2003023412A1 (en) * | 2001-09-07 | 2003-03-20 | Siemens Aktiengesellschaft | Method for detecting rotational speed |
| ES2281237A1 (en) * | 2004-03-09 | 2007-09-16 | Honda Motor Co., Ltd. | Method for angle correction of rotation angle detector |
| EP2169406A1 (en) * | 2008-09-08 | 2010-03-31 | Delphi Technologies, Inc. | Method for determining of the velocity of an electric motor |
| US11397191B2 (en) | 2017-12-05 | 2022-07-26 | Zf Friedrichshafen Ag | Gradient determination for measuring rotational speeds |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421640A1 (en) * | 1983-06-10 | 1985-01-31 | Diesel Kiki Co. Ltd., Tokio/Tokyo | DEVICE FOR DETECTING THE CHANGE VALUE IN THE SPEED OF AN INTERNAL COMBUSTION ENGINE |
| JPS60145441A (en) * | 1984-01-09 | 1985-07-31 | Diesel Kiki Co Ltd | Fuel injection control method of internal-combustion engine and device thereof |
| DE3420870A1 (en) * | 1984-06-05 | 1985-12-05 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | ELECTRONIC SPEED MEASUREMENT OF PISTON COMBUSTION ENGINES |
| JPS61118545A (en) * | 1984-11-15 | 1986-06-05 | Nippon Denso Co Ltd | Fuel injection quantity controller |
| DE3924422C2 (en) * | 1988-08-16 | 1997-12-18 | Volkswagen Ag | Procedure for correcting a speed measurement |
| DE3835002C3 (en) * | 1988-10-14 | 1994-02-24 | Daimler Benz Ag | Process for recording and evaluating the speed in multi-cylinder internal combustion engines |
| JPH02136549A (en) * | 1988-11-14 | 1990-05-25 | Kokusan Denki Co Ltd | Controller for internal combustion engine |
| JPH0518310A (en) * | 1991-08-13 | 1993-01-26 | Nabco Ltd | Revolution detector for marine main engine |
| DE102008041307A1 (en) | 2008-08-18 | 2010-02-25 | Robert Bosch Gmbh | Method for dynamically adjusting an angular velocity with a digital angle sensor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2507057A1 (en) * | 1975-02-19 | 1976-09-02 | Bosch Gmbh Robert | METHOD AND DEVICE FOR DETERMINING THE RUNNING OF AN COMBUSTION ENGINE |
| DE2902815A1 (en) * | 1979-01-25 | 1980-08-07 | Bosch Gmbh Robert | IC engine crankshaft speed and variations detector - has pulse generating disc scanned by transducer whose signals are counted and evaluated in relation to time |
| JPS55137324A (en) * | 1979-04-16 | 1980-10-27 | Toyota Motor Corp | Fuel injection control method for internal combustion engine |
| DE105417T1 (en) * | 1982-10-01 | 1985-04-25 | Rockwell International Corp., Pittsburgh, Pa. | METHOD AND DEVICE FOR DETERMINING THE SPECIAL LOCATION OF A PISTON. |
-
1983
- 1983-01-19 JP JP593983A patent/JPS59141750A/en active Pending
-
1984
- 1984-01-09 GB GB08400383A patent/GB2134265B/en not_active Expired
- 1984-01-19 DE DE19843401751 patent/DE3401751A1/en active Granted
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0458775A2 (en) * | 1990-05-23 | 1991-11-27 | Peter Schoeggl | Device for electronic measurement of the rotational speed of internal combustion engines and a method for motor surveillance using this device |
| EP0458775A3 (en) * | 1990-05-23 | 1992-03-18 | Peter Schoeggl | Device for electronic measurement of the rotational speed of internal combustion engines and a method for motor surveillance using this device |
| FR2679338A1 (en) * | 1991-07-20 | 1993-01-22 | Westland Aerostructures Ltd | VEHICLE WHEEL SPEED SENSOR, METHOD FOR PRODUCING MARKING PULSES IN A MEASURING DEVICE AND METHOD FOR MEASURING THE ROTATION SPEED OF A ROTATING OBJECT. |
| GB2258049A (en) * | 1991-07-20 | 1993-01-27 | Westland Aerostructures Ltd | Vehicle wheel speed sensor, and method of converting a sine wave signal in a counting or measuring device to a pulse train |
| GB2258049B (en) * | 1991-07-20 | 1994-10-19 | Westland Aerostructures Ltd | Vehicle wheel speed sensors,& method of converting a sine wave signal in a counting or measuring device |
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| WO2002090998A2 (en) * | 2001-05-09 | 2002-11-14 | Mtu Friedrichshafen Gmbh | Speed filter |
| WO2003023412A1 (en) * | 2001-09-07 | 2003-03-20 | Siemens Aktiengesellschaft | Method for detecting rotational speed |
| WO2003023411A1 (en) * | 2001-09-07 | 2003-03-20 | Siemens Aktiengesellschaft | Method for detecting rotational speed |
| US6892130B2 (en) | 2001-09-07 | 2005-05-10 | Siemens Aktiengesellschaft | Method for detecting rotational speed |
| US7096136B2 (en) | 2001-09-07 | 2006-08-22 | Siemens Aktiengesellschaft | Method for detecting rotational speed |
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| EP2169406A1 (en) * | 2008-09-08 | 2010-03-31 | Delphi Technologies, Inc. | Method for determining of the velocity of an electric motor |
| US8447469B2 (en) | 2008-09-08 | 2013-05-21 | Steering Solutions Ip Holding Corporation | Electric power steering system control methods |
| US11397191B2 (en) | 2017-12-05 | 2022-07-26 | Zf Friedrichshafen Ag | Gradient determination for measuring rotational speeds |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59141750A (en) | 1984-08-14 |
| GB2134265B (en) | 1986-08-06 |
| GB8400383D0 (en) | 1984-02-08 |
| DE3401751A1 (en) | 1984-07-19 |
| DE3401751C2 (en) | 1991-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19930109 |