Slide cam system and motor

Patent metadata

Field	Value
Publication number	US-12071869-B2
Application number	US-202017598091-A
Country	US
Kind code	B2
Filing date	Mar 24, 2020
Priority date	Mar 25, 2019
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

A slide cam system includes a camshaft comprising a carrier shaft with slide cam elements that each comprise a slotted switching member having a switching groove. The slide cam elements are displaceable axially relative to the carrier shaft by an actuator pin. A displacement element is arranged parallel with a longitudinal axis of the carrier shaft, and the displacement element is axially displaceable in a direction of the longitudinal axis. The displacement element has a first coupling pin arranged in a region of the first slide cam element and a second coupling pin arranged in a region of the second slide cam element. The coupling pins cooperate with a slotted switching member of the associated slide cam element such that as a result of the displacement element a movement initiated by the actuator pin of the first slide cam element can be transmitted to the second slide cam element.

First claim

What is claimed is:

1. A slide cam system for an internal combustion engine having a camshaft comprising:
a carrier shaft having a first slide cam element and a second slide cam element each comprising at least one slotted switching member each having at least one switching groove;
an actuator pin, wherein the first and second slide cam elements are displaceable axially relative to the carrier shaft by the actuator pin; and
a displacement element disposed parallel with a longitudinal axis of the carrier shaft, wherein the displacement element is axially displaceable in a direction of the longitudinal axis of the carrier shaft, wherein the displacement element comprises:
a first coupling pin that is disposed in a region of the first slide cam element, and
a second coupling pin that is disposed in a region of the second slide cam element,
wherein the first and second coupling pins cooperate with the at least one slotted switching member of the respective first and second slide cam elements such that as a result of the displacement element element a movement initiated by the actuator pin of the first slide cam element is configured to be transmitted to the second slide cam element, and
wherein the displacement element comprises a receiving element, wherein the carrier shaft comprises a locking element that cooperates with the receiving element during operation of the slide cam system such that the displacement element is locked between two positional changes.

2. The slide cam system of claim 1 wherein the locking element forms an abutment for the receiving element so that the locking element is configured to be acted on at least partially by forces present during a positional change of the second slide cam element.

3. The slide cam system of claim 1 wherein the displacement element comprises a spring/ball locking system.

4. The slide cam system of claim 1 wherein the actuator pin and the first and second coupling pins are offset by 90° in a peripheral direction of the carrier shaft.

5. The slide cam system of claim 1 wherein the at least one switching groove of the at least one slotted switching member of the first slide cam element is a first switching groove, wherein the at least one slotted switching member of the first slide cam element includes a second switching groove, with the first switching groove configured to receive the actuator pin and the second switching groove configured to receive the first coupling pin.

6. The slide cam system of claim 5 wherein the first switching groove and the second switching groove have a same rotation angle, wherein a radius of the first switching groove is greater than a radius of the second switching groove.

7. The slide cam system of claim 6 wherein the first and second switching grooves of the first slide cam element include an at least partially V-shaped profile.

8. The slide cam system of claim 1 wherein the at least one switching groove of the first slide cam element includes an at least partially Y-shaped profile.

9. The slide cam system of claim 8 wherein the at least one switching groove of the at least one slotted switching member of the first slide cam element is a first switching groove, wherein the first slide cam element includes a second switching groove configured to receive the first coupling pin that is arranged such that the displacement element is directly displaceable.

10. The slide cam system of claim 1 wherein the at least one switching groove of the first slide cam element includes regions with different radii, wherein one of the regions is an introduction region, one of the regions is a displacement region, and one of the regions is a discharge region.

11. The slide cam system of claim 1 wherein the at least one slotted switching member of the second slide cam element includes an at least partially V-shaped profile.

12. The slide cam system of claim 1 comprising a third slide cam element and a fourth slide cam element.

13. The slide cam system of claim 1 wherein the first and second slide cam elements are double slide cam elements, wherein each of the double slide cam elements is configured to control valves of two cylinders.

14. The slide cam system of claim 1 wherein the at least one switching grooves of the first and second slide cam elements are offset relative to each other at a rotation angle so that the second slide cam element is displaceable in a longitudinal direction of the carrier shaft in a temporally offset manner relative to the first slide cam element.

15. The slide cam system of claim 1 wherein the second slide cam element and a third slide cam element each have at least partially V-shaped profiles, wherein the V-shaped profiles each have a constant radius.

16. The slide cam system of claim 1 wherein the at least one switching grooves of the first slide cam element and the second slide cam element and a switching groove of a third slide cam element are offset relative to each other at a rotation angle such that the second and third slide cam elements are displaceable in a temporally offset manner relative to the first slide cam element in a longitudinal direction of the carrier shaft.

17. The slide cam system of claim 1 wherein the first and second slide cam elements each have at least four cam portions for controlling valves of two cylinders, with a stroke cam contour being configured in the at least four cam portions to actuate the valve of one of the two cylinders.

18. The slide cam system of claim 1 wherein the first and second slide cam elements each have cam portions for controlling a valve of a cylinder, with a stroke cam contour being configured to actuate the valve.

19. The slide cam system of claim 18 wherein each cam portion includes at least three stroke cam contours for actuating the valve, wherein the at least three stroke cam contours each comprise different strokes.

20. The slide cam system of claim 18 wherein in addition to the stroke cam contour each cam portion includes a zero stroke cam contour for switching off the cylinder associated with the valve, wherein the zero stroke cam contour adjoins the stroke cam contour.

21. The slide cam system of claim 1 comprising a multiple actuator that includes at least three actuator pins by way of which the first and second slide cam elements and a third slide cam element are movable into multiple axial positions to allow different switching positions for valves.

22. The slide cam system of claim 21 wherein the first slide cam element and the multiple actuator are disposed in a first axial region of the carrier shaft, wherein at least one of the second slide cam element or the third slide cam element is disposed in a second axial region of the carrier shaft that adjoins the first axial region.

23. The slide cam system of claim 21 wherein the first slide cam element and the multiple actuator are disposed in a longitudinal direction of the carrier shaft centrally between the second and third slide cam elements.

24. The slide cam system of claim 1 wherein the displacement element comprises the receiving element, wherein the carrier shaft comprises the locking element that cooperates with the receiving element during operation of the slide cam system such that the displacement element is locked between two positional changes, wherein the locking element includes at least partially a circular disk or an annular disk, wherein the locking element is disposed
between the first and second sli

Assignees

• Thyssenkrupp Presta Tecct Ag
• Thyssenkrupp Ag

Inventors

• Weidauer Marcel
• Schirmer Jens

Classifications

• F01L2013/0052

  with cams provided on an axially slidable sleeve · CPC title

• F01L2001/0473

  Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod · CPC title

• F01L1/46

  Component parts, details, or accessories, not provided for in preceding subgroups · CPC title

• F01L2820/031

  Electromagnets · CPC title

• F01L2013/0078

  by modification of cam contact point by axially displacing the camshaft · CPC title