ThyssenKrupp has filed a patent for a sliding cam system for internal combustion engines. The system includes a camshaft with primary and secondary sliding cam elements, an adjustment element, and an actuator. The adjustment element is parallel to the camshaft and has coupling pins that transmit movement from the primary to the secondary cam elements. A locking element on the primary cam element locks the adjustment element between position changes, and an abutment element receives axial forces transmitted by the locking element. GlobalData’s report on ThyssenKrupp gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on ThyssenKrupp, Hydrogen fuel cells was a key innovation area identified from patents. ThyssenKrupp's grant share as of September 2023 was 60%. Grant share is based on the ratio of number of grants to total number of patents.

Sliding cam system for internal combustion engine

Source: United States Patent and Trademark Office (USPTO). Credit: ThyssenKrupp AG

A recently filed patent (Publication Number: US20230304423A1) describes a sliding cam system for internal combustion engines. The system includes a camshaft, an adjustment element, and an actuator. The camshaft consists of a carrier shaft with a primary sliding cam element and at least one secondary sliding cam element. Each sliding cam element is axially displaceable and has a shift gate with at least one shift groove. The actuator has an actuator pin that engages with the shift groove of the primary sliding cam element based on the required switch position of the camshaft. The adjustment element is parallel to the carrier shaft and can be axially displaced. It has two coupling pins, one in the region of the primary sliding cam element and the other in the region of the secondary sliding cam element. These coupling pins interact with the shift gates of the respective sliding cam elements, allowing the adjustment element to transmit movement from the primary to the secondary sliding cam element. The primary sliding cam element has a locking element that can lock the adjustment element between position changes. An abutment element, which is non-displaceable and rotationally fixed relative to the carrier shaft, receives the axial forces transmitted by the locking element.

The patent also mentions various configurations and arrangements of the abutment element. It can be formed directly or indirectly on the cylinder head cover, cylinder head, or actuator. In the case of the actuator, the abutment element is formed axially next to the actuator pin. The locking element in the shift groove of the primary sliding cam element can be in the form of a circular disc or ring disc with a cutout/opening. The actuator pin, coupling pins, and adjustment element can be offset by 90° in the circumferential direction of the carrier shaft. The shift gate of the primary sliding cam element has a first shift groove for the actuator pin and a second shift groove for the first coupling pin, with the locking element formed in the first shift groove. The first shift groove can have an X-shaped, V-shaped, or Y-shaped profile. The second shift groove is located at the axial end of the primary sliding cam element and allows direct transmission of axial displacement to the adjustment element. The primary and secondary sliding cam elements are arranged at a rotary angle to each other, enabling the secondary sliding cam element to be displaced with a time offset relative to the primary sliding cam element.

Overall, this patent describes a sliding cam system that allows for precise adjustment and control of the camshaft in internal combustion engines. The system includes various elements and configurations to ensure smooth and accurate transmission of movement between the primary and secondary sliding cam elements.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies