GB2395982A - Camshaft adjustment using a direct-current commutator motor - Google Patents
Camshaft adjustment using a direct-current commutator motor Download PDFInfo
- Publication number
- GB2395982A GB2395982A GB0325505A GB0325505A GB2395982A GB 2395982 A GB2395982 A GB 2395982A GB 0325505 A GB0325505 A GB 0325505A GB 0325505 A GB0325505 A GB 0325505A GB 2395982 A GB2395982 A GB 2395982A
- Authority
- GB
- United Kingdom
- Prior art keywords
- adjustment
- camshaft
- direct
- gearing
- commutator motor
- 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.)
- Withdrawn
Links
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
An adjustment device for two sub-assemblies connected in a rotationally driven manner, in particular for the adjustment of a camshaft 10 relative to the drive wheel driving it, comprising adjustment gearing arranged between the two sub-assemblies which is driven by a direct-current commutator motor 14 for adjustment purposes. The adjustment gearing may be self-locking or subject to high internal friction. The rotor of the direct-current commutator motor may be connected to the input of reduction gearing, where the gearing is connected at one end to the camshaft and at the other to the drive wheel of the camshaft.
Description
Camshaft Adjustment The invention relates to an adjustment device for two
sub-assemblies connected in a rotationally driven manner, in particular for the adjustment of a camshaft relative to the drive wheel driving the camshaft, having an adjustment gearing which is arranged between the two sub-assemblies and which is capable of being driven by way of an electric motor for adjustment purposes and as already known from DE 41 10 195 C2.
In the case of this known arrangement for the adjustment of two subassemblies connected in a rotationally driven manner, in particular for the adjustment of a camshaft relative to the drive wheel driving the camshaft, having an adjustment gearing which is arranged between the two and which is capable of being driven by way of an electric motor for adjustment purposes, and in which the stator of the electric motor is arranged in a stationary manner, the adjustment gearing together with the rotor of the electric motor is mounted on a shaft portion so as to be rotatable relative to the camshaft and the shaft portion is connected to the camshaft in a rotationally fixed manner.
The proposed solution of an arrangement has the advantage over the known prior art that by virtue of using a stationary direct-current commutator motor the system has a considerably longer service life and the outlay for implementing the arrangement accor-
ding to the invention is significantly reduced.
In the case of the solution proposed it is possible to dispense with the use of a jointly rotating direct-current motor or with the transmission of the electrical energy with slip rings, so that the mechanical vulnerability of the arrangement according to the
invention is also reduced.
The arrangement according to the invention is illustrated in the drawing and is explained in greater detail below.
The single Figure 1 shows the device for adjusting the camshaft with a direct-
current commutator motor.
In the Figure 1, the camshaft is designated with the reference numeral 10. The component 11 is a chain wheel, and a planet wheel with a gearing is designated with the reference numeral 12, the said components being situated on the cylinder head of the engine of a vehicle. A stationary direct-current commutator motor 14 is mounted on the crankcase 13. The rotor of the motor is connected to the input of a self-locking reduction gearing or a reduction gearing subject to high internal friction, the said reduction gearing being connected at one end to the camshaft and at the other end to the drive wheel of the camshaft and serving to adjust the phase angle.
When the internal-combustion engine is running, the rotor of the electric adjustment motor rotates at the rotational speed of the camshaft. If an adjustment of the camshaft is to take place, the adjustment motor has to rotate slightly faster or more slowly until the desired adjustment angle is achieved. After that, the motor has to rotate at the rotational speed of the camshaft again, in order to retain the adjustment. The various rotational speeds are controlled by way of a central control unit which is not illustrated in the Figure. The synchronization of the movements is carried out automatically by way of the mechanical commutator, and the regulation need only compensate the remaining slow changes or set the desired phase angle.
Al In order to understand the arrangement according to the invention the following remarks should be made: A deviation of the rotational speed of the adjustment motor from the rotational speed of the camshaft results in an adjustment of the camshaft. In the case of a stationary adjustment motor, therefore, it is necessary to keep its rotational speed in an absolutely exact correspondence with the rotational speed of the camshaft.
Hitherto, in the case of the known systems, adjustment motors with a low moment of inertia and a rapid regulation were necessary for this purpose, in order to follow the high dynamics of the internal-combustion engine.
When a self-locking gearing or a gearing designed with high internal friction is used, the demands made upon the motor and the regulation are reduced. The rotor of the adjustment motor is kept at the corresponding rotational speed essentially by the camshaft and not by a separate drive. A stationary direct-current commutator motor is particularly suitable for this purpose. Synchronization takes place automatically by way of the mechanical commutator, and the regulation need only compensate the remaining slow changes or set the desired phase angle.
Claims (5)
1. An adjustment device for two sub-assemblies connected in a rotationally driven manner, said adjustment device having an adjustment gearing which is arranged between the two sub-assemblies and which is capable of being driven by way of an electric motor for adjustment purposes, wherein a direct-current commutator motor is arranged as the electric motor.
2. An adjustment device according to claim 1 wherein the adjustment device is for the adjustment of a camshaft relative to a drive wheel driving the camshaft.
3. An adjustment device according to claim 2, wherein the adjustment gearing is self-
locking or is subject to high internal friction and the rotor of the direct-current commutator motor is connected to the input of the reduction gearing, wherein the said reduction gearing is connected at one end to the camshaft and at the other end to the drive wheel of the camshaft.
4. An adjustment device according to one of the preceding claims, wherein the direct-
current commutator motor is mounted on a crankcase.
5. An adjustment device substantially as hereinbefore described with reference to or as shown in the accompanying figure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10251533A DE10251533A1 (en) | 2002-11-04 | 2002-11-04 | Camshaft adjustment system to adjust camshaft speed relative to the wheel driving it employs fixed position d.c. motor as regulating unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0325505D0 GB0325505D0 (en) | 2003-12-03 |
| GB2395982A true GB2395982A (en) | 2004-06-09 |
Family
ID=29723939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0325505A Withdrawn GB2395982A (en) | 2002-11-04 | 2003-10-31 | Camshaft adjustment using a direct-current commutator motor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20040134453A1 (en) |
| DE (1) | DE10251533A1 (en) |
| FR (1) | FR2847300A1 (en) |
| GB (1) | GB2395982A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2089613A2 (en) * | 2006-12-05 | 2009-08-19 | The Timken Company | Control structure for electro-mechanical camshaft phase shifting device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614311B (en) * | 2015-01-13 | 2018-02-06 | 苏州市职业大学 | A kind of twist mechanism of adjustment sample position suitable for low frequency mechanical spectrometer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4101676A1 (en) * | 1991-01-22 | 1992-07-23 | Schaeffler Waelzlager Kg | Rotary connection adjuster for camshaft to drive wheel - involves electric motor with thread section axially displaceable on fixed thread section for relative setting |
| DE4110195A1 (en) * | 1991-03-28 | 1992-10-01 | Schaeffler Waelzlager Kg | Camshaft advancer for improving efficiency of combustion engine - uses slip-ring-free electric motor to alter position of camshaft relative to camshaft gear using planetary gearbox |
| US6257186B1 (en) * | 1999-03-23 | 2001-07-10 | Tcg Unitech Aktiengesellschaft | Device for adjusting the phase angle of a camshaft of an internal combustion engine |
| US20020020376A1 (en) * | 2000-07-26 | 2002-02-21 | Kai Lehmann | Device for relative angular adjustment between two drive-connected elements rotating at the same rotational speed |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60004412T2 (en) * | 1999-02-05 | 2004-06-24 | Unisia Jecs Corp., Atsugi | Variable valve control device for an internal combustion engine |
| DE19905234A1 (en) * | 1999-02-09 | 2000-08-17 | Bosch Gmbh Robert | Adjusting unit for applying variable control to internal combustion engine valves has a cylindrical worm drive with a screw thread and a sliding element running along the worm drive's thread and sliding on the worm drive |
-
2002
- 2002-11-04 DE DE10251533A patent/DE10251533A1/en not_active Ceased
-
2003
- 2003-10-22 US US10/689,847 patent/US20040134453A1/en not_active Abandoned
- 2003-10-31 GB GB0325505A patent/GB2395982A/en not_active Withdrawn
- 2003-11-03 FR FR0312857A patent/FR2847300A1/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4101676A1 (en) * | 1991-01-22 | 1992-07-23 | Schaeffler Waelzlager Kg | Rotary connection adjuster for camshaft to drive wheel - involves electric motor with thread section axially displaceable on fixed thread section for relative setting |
| DE4110195A1 (en) * | 1991-03-28 | 1992-10-01 | Schaeffler Waelzlager Kg | Camshaft advancer for improving efficiency of combustion engine - uses slip-ring-free electric motor to alter position of camshaft relative to camshaft gear using planetary gearbox |
| US6257186B1 (en) * | 1999-03-23 | 2001-07-10 | Tcg Unitech Aktiengesellschaft | Device for adjusting the phase angle of a camshaft of an internal combustion engine |
| US20020020376A1 (en) * | 2000-07-26 | 2002-02-21 | Kai Lehmann | Device for relative angular adjustment between two drive-connected elements rotating at the same rotational speed |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2089613A2 (en) * | 2006-12-05 | 2009-08-19 | The Timken Company | Control structure for electro-mechanical camshaft phase shifting device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0325505D0 (en) | 2003-12-03 |
| FR2847300A1 (en) | 2004-05-21 |
| DE10251533A1 (en) | 2004-05-19 |
| US20040134453A1 (en) | 2004-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |