Sliding Cam System Axial Movement Transfer
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Solution Overview
Problem
The existing sliding cam systems require significant installation space and incur high manufacturing and cost expenses due to the design of the coupling rod and links, which limits their efficiency and cost-effectiveness in engine design.
Innovation Solution
A sliding cam system with a carrier shaft and axially displaceable sliding cam elements, where an adjusting element with coupling pins transfers the axial movement of one sliding cam element to another, allowing for space-saving design and reduced production costs by eliminating the need for extensive coupling rods and links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coupling rod with cams is used to transfer axial movement between sliding cams, then the movement transfer function is achieved, but the installation space requirement increases significantly
Solution Approach 1:
The invention merges the coupling rod, cams, and movement transfer function into a single integrated adjusting element. This adjusting element has coupling pins that directly engage with the sliding cams, eliminating the need for separate coupling rods and cams while achieving the same movement transfer function. The consolidation reduces the number of components and the space they occupy in the engine.
Solution Approach 2:
The invention extracts and eliminates the coupling rod and its associated cams from the system. By using coupling pins that directly interact with the sliding cams through switching grooves, the design removes the bulky coupling rod mechanism while retaining the essential function of transferring axial movement between sliding cams.
2Reliability
If a coupling rod with cams is used to transfer axial movement, then the movement transfer function is achieved, but the manufacturing effort and costs increase
Solution Approach 1:
The adjusting element combines multiple functions (coupling, movement transfer, and actuation) into a single component. This reduces the total number of parts that need to be manufactured, assembled, and quality-checked, thereby reducing manufacturing effort and costs while maintaining the movement transfer function.
Solution Approach 2:
The adjusting element serves multiple purposes: it acts as a coupling mechanism, a movement transfer device, and an actuation element. This multi-functionality reduces the need for specialized components, simplifying the manufacturing process and reducing costs associated with producing and managing multiple specialized parts.
3Reliability
If multiple separate components (coupling rod, cams, links) are used, then the movement transfer function is achieved, but the device complexity increases
Solution Approach 1:
The invention consolidates the coupling rod, cams, and links into a single adjusting element with integrated coupling pins. This merger reduces the number of discrete components from multiple separate parts to one unified element, thereby reducing device complexity while preserving the movement transfer function.
Solution Approach 2:
The adjusting element is designed with distinct coupling pins that can independently engage with different sliding cams, providing segmented functionality within a unified structure. This allows the complex movement transfer function to be achieved through modular interactions within a single component, reducing overall system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves space-saving and cost-effective implementation by enabling the transfer of axial movement between sliding cam elements, reducing installation space requirements and manufacturing efforts while maintaining efficient engine operation.
Implementation Method 1
Each sliding cam element (12a, 12b) comprises a switching cam (13) with a switching groove (14). An actuator pin (15) interacts with the switching groove to initiate axial movement of the sliding cam element.
Implementation Method 2
The adjusting element (16) has coupling pins (17a, 17b) that interact with the switching groove (14) of the sliding cam elements (12a, 12b) in such a way that the axial movement of the first sliding cam element (12a) can be transferred to the second sliding cam element (12b) by the adjusting element (16).
Data Source
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AI summary
The invention relates to a slide cam system for an internal combustion engine having at least one camshaft (10) comprising a carrier shaft (11) having at least two slide cam elements (12a, 12b), each comprising a shifting gate (13) having at least one switch groove (14), wherein the slide cam elements (12a, 12b) are axially movable relative to the carrier shaft (11) by means of at least one actuator pin (15) and at least one adjustment element (16) is arranged parallel to a longitudinal axis of the carrier shaft (11), wherein the adjustment element (16) is axially movable in the direction of the longitudinal axis of the carrier shaft (11). The slide cam system is characterized in that the adjustment element (16) has at least two coupling pins (17a, 17b), wherein a first coupling pin (17a) is arranged in the region of the first slide cam element (12a) and a second coupling pin (17b) is arranged in the region of the second slide cam element (12b) and each coupling pin (17a, 17b) interacts with a shifting gate (13) of the relevant associated slide cam element (12a, 12b) such that a movement of the first slide cam element (12a), initiated by the actuator pin (15), is transmittable to the second slide cam element (12b) by the adjustment element (16).