US20050229881A1 - Device for adjusting the phase position between the camshaft and the crankshaft - Google Patents
Device for adjusting the phase position between the camshaft and the crankshaft Download PDFInfo
- Publication number
- US20050229881A1 US20050229881A1 US11/156,904 US15690405A US2005229881A1 US 20050229881 A1 US20050229881 A1 US 20050229881A1 US 15690405 A US15690405 A US 15690405A US 2005229881 A1 US2005229881 A1 US 2005229881A1
- Authority
- US
- United States
- Prior art keywords
- camshaft
- crankshaft
- phase position
- adjustment
- control
- 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.)
- Abandoned
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Classifications
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/352—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using bevel or epicyclic gear
-
- 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
- F01L2201/00—Electronic control systems; Apparatus or methods therefor
-
- 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
- F01L2800/00—Methods of operation using a variable valve timing mechanism
-
- 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
- F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
-
- 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
- F02D2041/1418—Several control loops, either as alternatives or simultaneous
- F02D2041/1419—Several control loops, either as alternatives or simultaneous the control loops being cascaded, i.e. being placed in series or nested
Definitions
- the invention relates to a device for adjusting the phase position between a camshaft and a crankshaft of an internal combustion engine.
- the crankshaft drives one or more camshafts via a primary drive, provided, for example, as a toothed belt.
- a camshaft timing gear is mounted to each camshaft, by which the primary drive drives the camshaft.
- a transmission of the angle of rotation of the crankshaft occurs, in which a 720° angle of rotation of the crankshaft ⁇ K is transmitted into a 360° angle of rotation of the camshaft ⁇ N . Therefore, through this coupling the two angles of rotation are constant in reference to one another.
- the operational characteristics of an internal combustion engine can be optimized, particularly with regard of fuel consumption, exhaust emission, and running performance, when the system of camshaft and crankshaft, coupled via the primary drive, can be modified.
- DE 100 38 354 A1 discloses an arrangement for adjusting the angle of rotation of a camshaft relative to a crankshaft using a wobble plate mechanism.
- a second drive additionally acts on the camshaft via a wobble plate mechanism, which is arranged between the camshaft phasing gear and the camshaft. This causes the camshaft to be adjustable relative to the crankshaft.
- the objective of the invention is to provide a simple and cost effective adjustment device, by which the phase position between the camshaft and the crankshaft can be adjusted.
- the adjustment device is a component of an electronic circuit automatically adjusting the desired phase position either directly or indirectly via another parameter, with the circuit comprising a control device and a control path having a structure specified for that application.
- the advantage of the invention lies in the fact that such an adjustment device, having such an electronic circuit, can adjust very quickly and precisely the desired value in the control path.
- the target value can be adjusted with the adjustment device even more quickly and more precisely by way of compensating variable disturbances, or by adjusting a cascading positioning or by way of a state control.
- FIG. 1 is a schematic view of an adjustment device having a compensation for variable disturbances according to the invention.
- FIG. 2 is a schematic view of an adjustment device having a cascading positioning adjustment in accordance with another embodiment of the invention.
- FIG. 3 is a schematic view of an adjustment device having an optimized state control in accordance with another embodiment of the invention.
- FIG. 1 shows an adjustment device provided with a positioning control 1 having a compensation for variable disturbances 2 .
- the relative rotational speed of the electric motor is equivalent to the rotational speed of the sprocket or the belt pulley coupling the crankshaft with the camshaft, when the phase position remains unchanged.
- the relative rotational speed of the electric motor is faster or slower than the speed of the sprocket depending on the direction of the adjustment.
- the effect of the variable disturbance of the crank shaft rotational speed z is not collected only when it effects the control variable, but is already used for the pre-adjustment of the adjustment member 3 .
- the rotational speed of the sprocket or the belt pulley can be determined from the rotational speed of the crankshaft.
- the rotational speed z can be related to a corresponding self-inducting voltage y R at the electric motor.
- the target value w in the exemplary embodiment the desired phase position, is entered into the control 4 .
- the target value w acts on the electric motor of the adjustment member in the control path 3 , e.g., a wobble plate mechanism. This causes the rotational speed of the sprocket or the belt pulley to change, resulting in a modified phase position.
- the actual value x of the phase position and/or the rotational speed of the sprocket or the belt pulley is fed back.
- the returned actual value determines the new target value for the control. This new target value is then fed to the control.
- the compensation for variable disturbances 2 is formed such that, additionally, from the rotational speed of the crankshaft z the self-induction voltage y z is determined as an additional adjustment parameter for the electric motor of the adjustment member, also determining the rotational speed of the electric motor.
- FIG. 2 shows an adjustment device having a cascading positioning control.
- the positioning control provided with a positioning return, is provided with a subordinate rotational speed control of the electric motor, which is provided with a feed back of the angular speed.
- the rotational speed and/or the angular speed of the electric motor can be determined in the form of a measurement or can be calculated indirectly via the trigger information of the camshaft and the crankshaft.
- the rotational speed control is cascaded by a control of the armature current, in which an additional compensation control can improve the dynamics.
- the control of the armature current and/or the measurement of the armature current can also occur via a measurement of the torque of the electric motor driving the adjustment device.
- a target rotation angle ⁇ s is given, describing the position and/or phase position between the camshaft and the crankshaft.
- the rotational speed and/or the angular speed ⁇ s is given for the electric motor.
- the angular speed itself is determined by the torque of the electric motor.
- the torque M L and/or the corresponding current is measured and returned and here compared with the corresponding target value Ms.
- FIG. 3 shows an adjustment device having a state control.
- the dynamics of the control system are largely determined, because the conditions determining the dynamics directly enter the control. If the condition to be determined cannot be measured directly, it may be calculated by way of a state observer and/or a state equation.
- a time controlled input value w(t) is entered in to a pre-filter 5 .
- the pre-filter generates an output value u w (t) therefrom, which forms together with a value u r (t) created by a state control 6 an input value u(t) for the state differential equation 7.
- the actual value x(t 0 ) at the time to is fed to the state differential equation 7.
- the state differential equation 7 calculates the state x(t).
- the state can be measured either directly or indirectly via a measuring device 8 , with the measurement being able to influence the state control 6 , which again influences the input value u(t) for the state differential equation 7.
- control path 10 is formed by the state differential equation 7 and the output equation 9, which create the variable control.
- the control device 11 controlling the variable control, is essentially formed by the measuring device 8 and the state control 6 .
- the control device 11 also includes the pre-filter 5 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
A device for adjusting the phase position between a camshaft and a crankshaft is provided. A quick and precise electronic adjustment for mechanical adjustment devices for adjusting the phase position between a camshaft and a crankshaft have previously not been known. The adjustment device is a component of an electronic circuit, either automatically adjusting the desired phase position directly or indirectly via another parameter, with the circuit including at least one loop between the control device and the adjustment path, by which a quick and precise adjustment can be achieved. Such arrangements are needed for a quick and precise adjustment of the phase position of a camshaft in reference to a crankshaft in internal combustion engines.
Description
- This application is a continuation of PCT/DE2003/003620, filed Oct. 31, 2003, which is incorporated herein by reference as if fully set forth.
- The invention relates to a device for adjusting the phase position between a camshaft and a crankshaft of an internal combustion engine.
- In internal combustion engines, the crankshaft drives one or more camshafts via a primary drive, provided, for example, as a toothed belt. For this purpose, a camshaft timing gear is mounted to each camshaft, by which the primary drive drives the camshaft. Here, at any time a transmission of the angle of rotation of the crankshaft occurs, in which a 720° angle of rotation of the crankshaft φK is transmitted into a 360° angle of rotation of the camshaft φN. Therefore, through this coupling the two angles of rotation are constant in reference to one another. In most applications, this fixed coupling of crankshaft and camshaft results in a ratio of
- However, the operational characteristics of an internal combustion engine can be optimized, particularly with regard of fuel consumption, exhaust emission, and running performance, when the system of camshaft and crankshaft, coupled via the primary drive, can be modified.
- DE 100 38 354 A1 discloses an arrangement for adjusting the angle of rotation of a camshaft relative to a crankshaft using a wobble plate mechanism. Here, a second drive additionally acts on the camshaft via a wobble plate mechanism, which is arranged between the camshaft phasing gear and the camshaft. This causes the camshaft to be adjustable relative to the crankshaft.
- The objective of the invention is to provide a simple and cost effective adjustment device, by which the phase position between the camshaft and the crankshaft can be adjusted.
- This objective is attained according to the invention. Here, the adjustment device is a component of an electronic circuit automatically adjusting the desired phase position either directly or indirectly via another parameter, with the circuit comprising a control device and a control path having a structure specified for that application.
- The advantage of the invention lies in the fact that such an adjustment device, having such an electronic circuit, can adjust very quickly and precisely the desired value in the control path.
- Advantageous further developments also result from the invention as further described below. Here, for example, the target value can be adjusted with the adjustment device even more quickly and more precisely by way of compensating variable disturbances, or by adjusting a cascading positioning or by way of a state control.
- In the following, the invention will be explained in greater detail using three exemplary embodiments shown in the figures. In the drawings:
-
FIG. 1 is a schematic view of an adjustment device having a compensation for variable disturbances according to the invention. -
FIG. 2 is a schematic view of an adjustment device having a cascading positioning adjustment in accordance with another embodiment of the invention. -
FIG. 3 is a schematic view of an adjustment device having an optimized state control in accordance with another embodiment of the invention. -
FIG. 1 shows an adjustment device provided with apositioning control 1 having a compensation forvariable disturbances 2. In state of the art mechanical phase adjustment devices, driven by electric motors, such as e.g., the ones known from DE 100 38 354 A1, the relative rotational speed of the electric motor is equivalent to the rotational speed of the sprocket or the belt pulley coupling the crankshaft with the camshaft, when the phase position remains unchanged. During the phase adjustment the relative rotational speed of the electric motor is faster or slower than the speed of the sprocket depending on the direction of the adjustment. - In the present exemplary embodiment the effect of the variable disturbance of the crank shaft rotational speed z is not collected only when it effects the control variable, but is already used for the pre-adjustment of the
adjustment member 3. For example, the rotational speed of the sprocket or the belt pulley can be determined from the rotational speed of the crankshaft. The rotational speed z can be related to a corresponding self-inducting voltage yR at the electric motor. - In
FIG. 1 , the target value w, in the exemplary embodiment the desired phase position, is entered into thecontrol 4. The target value w acts on the electric motor of the adjustment member in thecontrol path 3, e.g., a wobble plate mechanism. This causes the rotational speed of the sprocket or the belt pulley to change, resulting in a modified phase position. The actual value x of the phase position and/or the rotational speed of the sprocket or the belt pulley is fed back. The returned actual value determines the new target value for the control. This new target value is then fed to the control. The compensation forvariable disturbances 2 is formed such that, additionally, from the rotational speed of the crankshaft z the self-induction voltage yz is determined as an additional adjustment parameter for the electric motor of the adjustment member, also determining the rotational speed of the electric motor. -
FIG. 2 shows an adjustment device having a cascading positioning control. In order to improve the adjustment times and to achieve higher dynamics in the circuit, here, several circuits are nested parallel to one another. Here, disturbances are compensated in the subordinate circuits, before they can have any effect on the superordinate circuits. In the present exemplary embodiment, the positioning control, provided with a positioning return, is provided with a subordinate rotational speed control of the electric motor, which is provided with a feed back of the angular speed. Here, the rotational speed and/or the angular speed of the electric motor can be determined in the form of a measurement or can be calculated indirectly via the trigger information of the camshaft and the crankshaft. Furthermore, the rotational speed control is cascaded by a control of the armature current, in which an additional compensation control can improve the dynamics. The control of the armature current and/or the measurement of the armature current can also occur via a measurement of the torque of the electric motor driving the adjustment device. In this exemplary embodiment, a target rotation angle φs is given, describing the position and/or phase position between the camshaft and the crankshaft. Depending on the angle φs the rotational speed and/or the angular speed ωs is given for the electric motor. The angular speed itself is determined by the torque of the electric motor. The torque ML and/or the corresponding current is measured and returned and here compared with the corresponding target value Ms. When the values do not coincide, appropriate readjustments are made. Simultaneously the superordinate actual value ω of the angular speed is measured and subsequently returned for comparison to its target value ωs. In the event of any discrepancies, here too appropriate readjustments are made. Finally, the actual phase position φ is determined as well, returned, and adjusted to the target value φs. -
FIG. 3 shows an adjustment device having a state control. Through the use of the state control, the dynamics of the control system are largely determined, because the conditions determining the dynamics directly enter the control. If the condition to be determined cannot be measured directly, it may be calculated by way of a state observer and/or a state equation. - Here, a time controlled input value w(t) is entered in to a pre-filter 5. The pre-filter generates an output value uw(t) therefrom, which forms together with a value ur(t) created by a state control 6 an input value u(t) for the state differential equation 7. Furthermore, the actual value x(t0) at the time to is fed to the state differential equation 7. Using these values the state differential equation 7 calculates the state x(t). The state can be measured either directly or indirectly via a
measuring device 8, with the measurement being able to influence the state control 6, which again influences the input value u(t) for the state differential equation 7. Additionally, the actual value x(t) can be fed to theoutput equation 9 for further processing, which then creates an output value y(t) for thecontrol path 10. In the circuit shown, thecontrol path 10 is formed by the state differential equation 7 and theoutput equation 9, which create the variable control. Thecontrol device 11, controlling the variable control, is essentially formed by themeasuring device 8 and the state control 6. In the exemplary embodiment thecontrol device 11 also includes thepre-filter 5. - All exemplary embodiments may be combined with one another in various ways depending on the particular application.
Claims (4)
1. An electronically driven mechanical adjustment device for adjusting a phase position (φ) between a camshaft and a crankshaft, comprising an adjuster that is part of an electronic circuit, for automatically adjusting a desired phase position (φ) between the camshaft and the crankshaft, and the circuit including at least one loop, in which an output value is fed back to the input.
2. An adjustment device according to claim 1 , wherein the electronic circuit includes a compensation for variable disturbances (2).
3. An adjustment device according to claim 1 , wherein the electronic circuit includes several control loops, nested parallel in a cascading fashion, with at least one circuit being superordinate to another one.
4. Control device according to claim 1 , wherein the circuit in which the adjustment device is arranged includes a state control (10, 11).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10259134.2 | 2002-12-18 | ||
DE10259134A DE10259134A1 (en) | 2002-12-18 | 2002-12-18 | Device for adjusting the phase position between the camshaft and crankshaft |
PCT/DE2003/003620 WO2004057162A1 (en) | 2002-12-18 | 2003-10-31 | Device for adjusting the phase position between the camshaft and the crankshaft |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/003620 Continuation WO2004057162A1 (en) | 2002-12-18 | 2003-10-31 | Device for adjusting the phase position between the camshaft and the crankshaft |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050229881A1 true US20050229881A1 (en) | 2005-10-20 |
Family
ID=32519045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/156,904 Abandoned US20050229881A1 (en) | 2002-12-18 | 2005-06-20 | Device for adjusting the phase position between the camshaft and the crankshaft |
Country Status (4)
Country | Link |
---|---|
US (1) | US20050229881A1 (en) |
EP (1) | EP1573177B1 (en) |
DE (2) | DE10259134A1 (en) |
WO (1) | WO2004057162A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10352851A1 (en) | 2003-11-10 | 2005-06-23 | Aft Atlas Fahrzeugtechnik Gmbh | Verdrehwinkelregelung |
DE102005015856A1 (en) | 2004-12-24 | 2006-07-13 | Daimlerchrysler Ag | Method and device for adjusting an electrodynamic brake of an electric camshaft adjuster for a camshaft of an internal combustion engine |
DE102014213253B4 (en) | 2014-07-08 | 2017-12-28 | Schaeffler Technologies AG & Co. KG | Method for operating a camshaft adjuster and regulating device for a phaser |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5056477A (en) * | 1989-09-09 | 1991-10-15 | Robert Bosch Gmbh | Apparatus for adjusting a rotational angular relationship between a camshaft and its drive element |
US5184578A (en) * | 1992-03-05 | 1993-02-09 | Borg-Warner Automotive Transmission & Engine Components Corporation | VCT system having robust closed loop control employing dual loop approach having hydraulic pilot stage with a PWM solenoid |
US5218935A (en) * | 1992-09-03 | 1993-06-15 | Borg-Warner Automotive Transmission & Engine Components Corporation | VCT system having closed loop control employing spool valve actuated by a stepper motor |
US5289805A (en) * | 1992-03-05 | 1994-03-01 | Borg-Warner Automotive Transmission & Engine Components Corporation | Self-calibrating variable camshaft timing system |
US20020017257A1 (en) * | 2000-08-05 | 2002-02-14 | Detlef Axmacher | Control unit for adjusting the angle of rotation of a camshaft |
US6373614B1 (en) * | 2000-08-31 | 2002-04-16 | Cambridge Research Instrumentation Inc. | High performance polarization controller and polarization sensor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4122391A1 (en) * | 1991-07-05 | 1993-01-07 | Bosch Gmbh Robert | METHOD FOR OPERATING A SPEED-CONTROLLABLE MOTOR |
JP3733600B2 (en) * | 1994-08-31 | 2006-01-11 | 株式会社デンソー | Engine valve operation timing adjustment device |
DE59913140D1 (en) * | 1998-09-09 | 2006-04-27 | Kuka Roboter Gmbh | Method and device for improving the dynamic behavior of a robot |
-
2002
- 2002-12-18 DE DE10259134A patent/DE10259134A1/en not_active Withdrawn
-
2003
- 2003-10-31 DE DE50305071T patent/DE50305071D1/en not_active Expired - Lifetime
- 2003-10-31 WO PCT/DE2003/003620 patent/WO2004057162A1/en active IP Right Grant
- 2003-10-31 EP EP03776826A patent/EP1573177B1/en not_active Expired - Fee Related
-
2005
- 2005-06-20 US US11/156,904 patent/US20050229881A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5056477A (en) * | 1989-09-09 | 1991-10-15 | Robert Bosch Gmbh | Apparatus for adjusting a rotational angular relationship between a camshaft and its drive element |
US5184578A (en) * | 1992-03-05 | 1993-02-09 | Borg-Warner Automotive Transmission & Engine Components Corporation | VCT system having robust closed loop control employing dual loop approach having hydraulic pilot stage with a PWM solenoid |
US5289805A (en) * | 1992-03-05 | 1994-03-01 | Borg-Warner Automotive Transmission & Engine Components Corporation | Self-calibrating variable camshaft timing system |
US5218935A (en) * | 1992-09-03 | 1993-06-15 | Borg-Warner Automotive Transmission & Engine Components Corporation | VCT system having closed loop control employing spool valve actuated by a stepper motor |
US20020017257A1 (en) * | 2000-08-05 | 2002-02-14 | Detlef Axmacher | Control unit for adjusting the angle of rotation of a camshaft |
US6373614B1 (en) * | 2000-08-31 | 2002-04-16 | Cambridge Research Instrumentation Inc. | High performance polarization controller and polarization sensor |
Also Published As
Publication number | Publication date |
---|---|
DE50305071D1 (en) | 2006-10-26 |
WO2004057162A1 (en) | 2004-07-08 |
DE10259134A1 (en) | 2004-07-15 |
EP1573177B1 (en) | 2006-09-13 |
EP1573177A1 (en) | 2005-09-14 |
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AS | Assignment |
Owner name: AFT ATLAS FAHRZEUGTECHNIK GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NEUBAUER, DIRK;AXMACHER, DETLEF;WILKE, MARKUS;AND OTHERS;REEL/FRAME:016717/0804;SIGNING DATES FROM 20050523 TO 20050608 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |