EP1023533A1 - Method for controlling an electromechanical actuating device - Google Patents
Method for controlling an electromechanical actuating deviceInfo
- Publication number
- EP1023533A1 EP1023533A1 EP98952541A EP98952541A EP1023533A1 EP 1023533 A1 EP1023533 A1 EP 1023533A1 EP 98952541 A EP98952541 A EP 98952541A EP 98952541 A EP98952541 A EP 98952541A EP 1023533 A1 EP1023533 A1 EP 1023533A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- value
- setpoint
- anchor plate
- current
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1844—Monitoring or fail-safe circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/0007—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using electrical feedback
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
-
- 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
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
-
- 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
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2024—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit the control switching a load after time-on and time-off pulses
- F02D2041/2027—Control of the current by pulse width modulation or duty cycle control
-
- 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
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2031—Control of the current by means of delays or monostable multivibrators
-
- 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
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2037—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit for preventing bouncing of the valve needle
-
- 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
- F02D2041/2068—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements
- F02D2041/2079—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements the circuit having several coils acting on the same anchor
Definitions
- the invention relates to a method for controlling an electromechanical control device according to the preamble of claim 1. It relates in particular to a control device for controlling an internal combustion engine.
- An open actuator (DE 195 26 683 AI) has an actuator, which is designed as a gas exchange valve, and an actuator.
- the actuator has two electromagnets, between which an armature plate can be moved against the force of a restoring means by switching off the coil current on the holding electromagnet and switching on the coil current on the capturing electromagnet.
- the coil current of the respective catching electromagnet is kept constant at a predetermined catch value for a predetermined period of time and then regulated by a two-point controller with hysteresis to a hold value until the coil current is switched on.
- the object of the invention is to provide a method for controlling an actuating device which reduces the sound generation when an armature plate strikes an electromagnet.
- the object is achieved by the features of patent claim 1.
- the solution is characterized in that while the braking value is specified as the setpoint for the current, the current causes a braking field which generates a force which is directed counter to the acceleration force which acts on the armature plate.
- the acceleration force is caused by the tension of the springs.
- the impact speed of the anchor plate is reduced by the braking field.
- the solution also has the advantage that wear on the actuator is reduced.
- Time period T2 depends on the speed and a load size or a speed of the anchor plate or the braking value depends on the speed and the load size or speed of the anchor plate. This enables a targeted, asymmetrical adjustment of the rest position of the anchor plate without the sound radiation being increased during operation of the actuating device. This is particularly useful if the actuator is an exhaust valve, since this must be opened against the exhaust gas pressure in the cylinder.
- FIG. 1 shows an arrangement of an actuator in an internal combustion engine
- FIG. 2 shows a circuit arrangement of the driver for the control device
- FIG. 3 shows a block diagram of a control device for controlling the control device
- FIG. 4 shows a state diagram of block B6 of the control device
- FIG. 5a-e shows the time course of the control voltages, the current through the first and second coil, the position of the armature plate and an output signal of a comparator device 7.
- An actuator 1 (FIG. 1) comprises an actuator 11 and an actuator 12, which is designed, for example, as a gas exchange valve and has a shaft 121 and a plate 122.
- the actuator 11 has a housing 111 in which a first and a second electromagnet are arranged.
- the first electromagnet has a first core 112, in which a first coil 113 is embedded in an annular groove.
- the second electromagnet has a second core 114, in which a second coil 115 is embedded in a further annular groove.
- the first core 112 has a recess 116a, which forms a guide for the shaft 121.
- the second core 114 has a further recess 116, which also serves as a guide for the shaft 121.
- An anchor plate 117 is movably arranged in the housing 111 between the first core 112 and the second core 114.
- a first spring 118a and a second spring 118b bias the anchor plate 117 into a predetermined rest position t on R.
- the actuator 1 is rigidly connected to a cylinder head 21.
- An intake duct 22, an exhaust duct 22a and a cylinder with a piston 24 are assigned to the cylinder head 21.
- the piston 24 is coupled to a crankshaft 26 via a connecting rod 25.
- a control device 3 which detects signals from sensors and generates control signals for the control device 1.
- the sensors are a position sensor 4, which detects a position X of the armature plate 117, a first ammeter 5a, which detects the actual value I_AV1 of the current through the first coil 113, a second ammeter 5b, which detects an actual value I_AV2 of the current through the second coil 115 detects a speed sensor 27, which detects the speed N of the crankshaft 26, or a load detection sensor 28, which is preferably an air mass meter or a pressure sensor.
- other sensors can also be present.
- a comparator device 7 which generates a pulse signal depending on the detected position X and predetermined threshold values K1, K2, K3, K4.
- the comparator device 7 has four analog threshold value comparators, each of which changes its output signal at one of the threshold values K1, K2, K3, K4.
- the pulse signal of the comparator device which is plotted in FIG. 5e, then arises through a logical combination of the threshold value comparators.
- the threshold values K1, K2, K3, K4 (FIG.
- a timing element 8 (FIG. 1), which is preferably designed as a so-called “CAPCOM” unit, detects the pulse duration of the pulse signal generated by the comparator device 7 and forwards the time durations T_C2, T_02 assigned to the pulse durations to the control device 3 as digital data.
- the time period T_C2 is a measure of the average speed of the anchor plate between the threshold values K3 and K4.
- the time period T_02 also determined by the timer 8 is a measure of the average speed of the anchor plate 117 between the threshold values K2 and K1.
- Drivers 6a, 6b are provided which amplify the control signals of the control device 3.
- a circuit arrangement
- FIG. 2 of the driver 6a, 6b has a first transistor 61 whose base connection is connected to an output of the control device 3 and to which the voltage signal U S n is present. Furthermore, the circuit arrangement has a second transistor 62, the base connection of which is connected to the control device 3 and to which the voltage signal U s2 ⁇ is present. The circuit arrangement also has a first diode 63, a second diode 64 and a capacitor 65.
- the first transistor 61 becomes conductive from the collector to the emitter. If a high voltage level is additionally present at the second transistor 62 at the base-side connection, then the second transistor 62 also becomes conductive.
- the supply voltage U v then drops approximately at the first coil 113.
- the current I_AV1 through the coil 113 then increases until the entire supply voltage U v across the internal resistance of the first coil 113 drops. If a low voltage level is then specified at the base-side connection of the first transistor 61, the block Transistor 61 and the diooe 63 becomes conductive as a freewheeling diode.
- the current I_AV1 through the coil then ate.
- both the voltage level of the voltage signal Usn and the voltage level of the voltage signal U ⁇ 2 ⁇ are switched from high to low, both the first diode 63 and the second diode 64 become conductive and the current through the first coil 113 is driven by the charge of the capacitor 75, is reduced considerably more quickly than if e freewheeling takes place only via the first diode 63. This ensures a very rapid reduction in the current I_AV1 through the first coil 113.
- the circuit arrangement of driver 6b is analogous to the circuit arrangement shown in FIG. 2. It differs only in that the voltage signal U S ⁇ 2 is present at the base-side connection of the first transistor 61 and the voltage signal U ⁇ 22 is applied to the base connection of the second transistor 62, and in that the emitter of the first transistor 61 and the collector of the second Transistors 62 are electrically conductively connected to the second coil 115.
- FIG. 3 shows a block diagram of the control device 3 for controlling the electromechanical control device 1.
- a catch value I_F1 is determined from a map, depending on the speed N and the air mass flow MAF. The values of the map are determined on an engine test stand or by simulations in such a way that heat losses m of the respective coil are low.
- Em block B2 comprises an integrator which, depending on the difference between the setpoint T_C2 * and the actual time period T_C2, calculates a correction value with which the summing point S2 or the catch value I_F is corrected.
- a hold value I_H is dependent on the
- a braking value is determined from a characteristic field as a function of the speed N and the air mass flow MAF and / or as a function of the integral via the deviation of the target value T_02 * and the actual time period T_02.
- the setpoint T_02 * is fixed. Alternatively, however, it can also be determined from a map depending on at least one variable detected by the sensors.
- the time period T2 is determined from a map as a function of the speed N and the air mass flow MAF and / or the integral of the difference between the target value T_02 * and the actual time period T_02.
- block B6 it is determined whether the catch value I_F1, the hold value I_H, the braking value I_B or a zero value I_N (eg zero amperes) is assigned as the setpoint I_SP1 of the current for a controller B7.
- the controlled variable of the controller B7 is the current through the first coil 113. The function of the block B6 is described below with reference to FIG. 4.
- the difference between the setpoint I_SP1 determined in block B6 and the actual value I_AV1 of the current through the first coil 113 is the control difference of the two-point controller with hy sterically trained regulator B7.
- the block diagram is shown as an example for the calculation of the control signals for the first coil 113.
- the control signals for the second coil ie the voltage signals U S ⁇ 2 , U s22, are calculated analogously, only the time periods T_C2, T_C2 * are to be replaced by the time periods T_02, T_02 *.
- the output variable of block B6 is then the setpoint I_SP2 of the current through the second coil
- em regulator B8 which is the same in construction as the regulator B7 nat as the controlled variable the current through the second coil 115 and has the voltage signals U ⁇ ⁇ 2 and U s22 as manipulated variables .
- FIG. 4 shows the state diagram of block B6 as an example for the calculation of the setpoint I_SP1 of the current through the first coil 113.
- the first state ZI is the start from which the transition takes place in a state Z2 when the condition E1 is fulfilled that em Setpoint X_SP of position X is equal to a closed position C of anchor plate 117.
- the setpoint I_SP1 is the catch value I_F.
- state ZI there is a transition to state Z3 if a condition E2 is fulfilled, specifically that the setpoint X_SP of position X is equal to an open position 0.
- the setpoint I_SP1 is equal to the zero value I_N.
- a transition from the state Z2 to a state Z4 takes place if the period dt since the state Z2 was taken is greater than a period T0.
- the time period T0 is either fixed or determined by the detection of the impingement of the armature plate on the first electromagnet.
- the setpoint I_SP1 of the current through the first coil 113 is the hold value I_H.
- the transition from the state Z4 to a state Z5 takes place when a condition E4 that the setpoint X_SP of the position X of the anchor plate 117 is the open position 0 is fulfilled.
- the setpoint I_SP1 of the current through the first coil 113 is the zero value I_N.
- a transition from the state Z5 to a state Z6 takes place when the condition E5, in that the time period dt since the taking of the state Z5 is greater than a time period T1, is fulfilled.
- the time period Tl is predetermined such that a transition from the state Z5 to the state Z6 occurs at the earliest when the armature plate 117 begins to move away from the first electromagnet.
- the setpoint I_SP1 of the current through the first coil 113 is the braking value I_B.
- the condition E6 for a transition from the state Z6 to the state Z3 is that the time period dt since the state Z6 was taken is greater than
- the setpoint I_SP1 of the current through the first coil 113 is the zero value I_N.
- the condition E7 for the transition from state Z3 to state Z2 is that the setpoint X_SP of the position of the anchor plate is equal to the closed position C.
- the state diagram of block B6 for determining the setpoint I_SP2 of the current through the second coil 115 corresponds to the state diagram according to FIG. 4, with the difference that the closed position C by the open position 0 and
- Figure 5a shows the voltage signal U ⁇ n and the voltage signal U ⁇ ⁇ 2 (shown in dotted lines) plotted over the Figure 5b shows the voltage signal U s2 ⁇ and the voltage signal Us22 (shown in dotted lines) plotted over time t.
- FIG. 5c shows the assigned time profile of the actual value I_AV1 of the current through the first coil 113, and the time profile of the actual value I_AV2 (shown in dotted lines) of the current through the second coil 115.
- FIG. 5d shows the assigned position X of the anchor plate 117 plotted against the time t.
- the setpoint value of the current through the first coil 113 is the hold value I_H.
- the holding value I_H is predetermined such that the force on the armature plate 117 caused by the current through the first coil 113 is sufficient to hold the armature plate in contact with the first electromagnet and, on the other hand, only slight heat losses occur.
- the zero value I_N is specified as the setpoint I_SP1 of the current through the first coil 113 for the time period T1.
- both the voltage signal U s n and the voltage signal U s2 ⁇ are set to a low level, so that the actual value I_AV1 of the current through the first coil drops very quickly to the zero value I_N.
- the braking value I_B is specified as the desired value of the current through the first coil 113 at a time t 2 , for the time period T2.
- the rest position R can be specified asymmetrically to the contact surfaces of the armature plate on the two electromagnets. This is advantageous if the actuator is used as an outlet valve is trained that the exhaust valve must be moved during the transition from the closed position C to the open position 0 against oen low cylinder pressure.
- the time period Tl is preferably chosen so that the anchor plate at time t ; is still close to the closed position (e.g. has only covered 3% of the way between the closed and open positions). A very good braking effect on the anchor plate is achieved.
- the first coil again specifies the zero value I_N as the setpoint I_SP1 of the current. From the time t 8 , the setpoint I_SP1 of the current through the first coil is given the catch value I_F, specifically for the period T0.
- the catch value I_F is specified as the setpoint I_SP2 of the current through the second coil 115.
- the time t 3 can also be in time after the time t 4 .
- the associated course of the position X of the anchor plate shows that after the time ti the anchor plate first remains in the closed position C and then moves with increasing speed in the direction of the open position 0 until the acceleration of the anchor plate 117 decreases from time t 2 and the anchor plate reaches the open position 0 at time t 5 .
- the invention is not limited to the exemplary embodiment described.
- the method can be executed as a program by a microprocessor. However, it can also be implemented by a logic circuit or by an analog circuit arrangement.
- the catch value I_F and / or the holding value I_H and / or the braking value I_B can also be fixed, predetermined values.
- the controller can also be designed, for example, as a single-point controller with a timing element or as a pulse width modulation controller. A particularly low sound radiation from the actuator is achieved if the catch value I_F is additionally reduced, specifically for a period of time that depends on the difference between the setpoint T_C2 *, T_02 * and the actual period T_C2, T_02.
- the catch value is, for example, eight amperes, the hold value three amperes and the braking value ten amperes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Control Of Linear Motors (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19745536 | 1997-10-15 | ||
DE19745536A DE19745536C1 (en) | 1997-10-15 | 1997-10-15 | Method for controlling an electromechanical actuator |
PCT/DE1998/002599 WO1999019615A1 (en) | 1997-10-15 | 1998-09-02 | Method for controlling an electromechanical actuating device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1023533A1 true EP1023533A1 (en) | 2000-08-02 |
EP1023533B1 EP1023533B1 (en) | 2002-06-05 |
Family
ID=7845606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98952541A Expired - Lifetime EP1023533B1 (en) | 1997-10-15 | 1998-09-02 | Method for controlling an electromechanical actuating device |
Country Status (5)
Country | Link |
---|---|
US (1) | US6483689B1 (en) |
EP (1) | EP1023533B1 (en) |
JP (1) | JP2001520494A (en) |
DE (2) | DE19745536C1 (en) |
WO (1) | WO1999019615A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10002322C1 (en) * | 2000-01-20 | 2001-08-30 | Siemens Ag | Method for controlling an actuator |
DE10197018B4 (en) * | 2000-12-20 | 2006-02-09 | Siemens Vdo Automotive Corporation, Auburn Hills | Method for controlling a valve system |
DE10140432B4 (en) * | 2001-08-17 | 2010-02-11 | GM Global Technology Operations, Inc., Detroit | Method and device for noise and vibration reduction on a solenoid valve |
DE10315584B4 (en) * | 2003-04-05 | 2015-01-08 | Mahle Filtersysteme Gmbh | Method for actuating an electromagnetic actuating device and device for carrying it out |
FR2884349B1 (en) * | 2005-04-06 | 2007-05-18 | Moving Magnet Tech Mmt | BITABLE POLARIZED ELECTROMAGNETIC ACTUATOR WITH QUICK ACTUATION |
US7984706B2 (en) * | 2007-12-03 | 2011-07-26 | Continental Automotive Systems Us, Inc. | Control method for closed loop operation with adaptive wave form of an engine fuel injector oil or fuel control valve |
JP4587133B2 (en) * | 2008-06-04 | 2010-11-24 | 株式会社デンソー | Fuel supply device |
GB2470211B (en) * | 2009-05-14 | 2013-07-31 | Gm Global Tech Operations Inc | Hysteresis-type electronic controlling device for fuel injectors and associated method |
DE102010022536A1 (en) * | 2010-06-02 | 2011-12-08 | Continental Automotive Gmbh | Method and device for controlling a valve |
DE102011075269B4 (en) * | 2011-05-04 | 2014-03-06 | Continental Automotive Gmbh | Method and device for controlling a valve |
JP5639970B2 (en) * | 2011-08-03 | 2014-12-10 | 日立オートモティブシステムズ株式会社 | Control method for electromagnetic valve, control method for electromagnetic suction valve of high-pressure fuel supply pump, and control device for electromagnetic drive mechanism of electromagnetic suction valve |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1538224A (en) | 1975-02-25 | 1979-01-10 | Cav Ltd | Fuel supply systems for internal combustion engines |
DE3609599A1 (en) * | 1986-03-21 | 1987-09-24 | Bosch Gmbh Robert | METHOD FOR CONTROLLING THE DEACTIVATION TIME OF ELECTROMAGNETIC DEVICES, ESPECIALLY ELECTROMAGNETIC VALVES IN INTERNAL COMBUSTION ENGINES |
JPH0621531B2 (en) * | 1988-12-28 | 1994-03-23 | いすゞ自動車株式会社 | Control device for electromagnetically driven valve |
JP2606740B2 (en) * | 1989-05-01 | 1997-05-07 | 株式会社いすゞセラミックス研究所 | Valve stepping drive |
JPH07322044A (en) | 1994-05-30 | 1995-12-08 | Nec Corp | Facsimile equipment with automatic dialling function |
JPH07332044A (en) * | 1994-06-07 | 1995-12-19 | Honda Motor Co Ltd | Operation position detector in solenoid driving device for engine valve |
DE4433209C2 (en) | 1994-09-17 | 2000-02-03 | Mtu Friedrichshafen Gmbh | Device for the detection of the armature impact time when a solenoid valve is de-energized |
DE4434684A1 (en) * | 1994-09-28 | 1996-04-04 | Fev Motorentech Gmbh & Co Kg | Electromagnetic circuit armature movement control method e.g. for IC engine positioning element |
JP3315275B2 (en) | 1994-11-04 | 2002-08-19 | 本田技研工業株式会社 | Control device for opposed two solenoid type solenoid valve |
GB9422742D0 (en) | 1994-11-11 | 1995-01-04 | Lucas Ind Plc | Drive circuit |
JP3683300B2 (en) * | 1995-01-27 | 2005-08-17 | 本田技研工業株式会社 | Control device for internal combustion engine |
DE19526683A1 (en) * | 1995-07-21 | 1997-01-23 | Fev Motorentech Gmbh & Co Kg | Detecting striking of armature on electromagnetically actuated positioning device e.g. for gas exchange valves in IC engine |
DE19735375C2 (en) * | 1997-08-14 | 2002-04-04 | Siemens Ag | Solenoid valve, in particular for intake and exhaust valves of internal combustion engines |
-
1997
- 1997-10-15 DE DE19745536A patent/DE19745536C1/en not_active Expired - Fee Related
-
1998
- 1998-09-02 JP JP2000516148A patent/JP2001520494A/en active Pending
- 1998-09-02 EP EP98952541A patent/EP1023533B1/en not_active Expired - Lifetime
- 1998-09-02 DE DE59804352T patent/DE59804352D1/en not_active Expired - Fee Related
- 1998-09-02 US US09/529,634 patent/US6483689B1/en not_active Expired - Fee Related
- 1998-09-02 WO PCT/DE1998/002599 patent/WO1999019615A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9919615A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19745536C1 (en) | 1999-05-27 |
JP2001520494A (en) | 2001-10-30 |
EP1023533B1 (en) | 2002-06-05 |
DE59804352D1 (en) | 2002-07-11 |
US6483689B1 (en) | 2002-11-19 |
WO1999019615A1 (en) | 1999-04-22 |
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