Construction of an air intake device for the SIMSON models S50, S51, S53 and S70
The modified air intake assembly for Simson models adapts to larger carburetors with an O-ring seal and funnel design, ensuring compatibility and noise reduction.
Patent Information
- Application Number
- DE202025002717
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2025-12-31
- Estimated Expiration
- 2035-09-30
AI Technical Summary
Existing air intake systems for Simson models S50, S51, S53, and S70 are incompatible with newer, larger carburetors due to their original design, leading to increased noise levels and disrupted airflow patterns.
A modified air intake assembly comprising an intake flange and a funnel-shaped intake sleeve with an O-ring seal, allowing adaptation to larger carburetors while maintaining the original airflow path and reducing noise.
Enables the use of larger carburetors with secure sealing and optimized airflow, while reducing noise levels and preserving the original intake system's efficiency.
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Abstract
Description
Technical field
[0001] The invention relates to the constructive design of an air intake device for the SIMSON models S50, S51, S53 and S70, in particular the connection of intake flange and funnel-shaped intake sleeve with integrated sealing. State of the art
[0002] The original crankcase centers of Simson models have an intake flange with a maximum carburetor connection diameter of approximately 30 mm. Newer and more powerful carburetors, however, have larger connection diameters, making them incompatible with the original design. Previous solutions mostly rely on open air filters, which, while providing sufficient airflow, increase noise levels and do not match the original airflow pattern. Object of the invention
[0003] The aim is to create a design that allows the use of carburetors with larger connection diameters, ensures a reliable seal, and essentially preserves the original air intake path. The solution should also be adaptable to the design features of the crankcase center section. Solution to the task
[0004] The assembly according to the invention comprises an intake flange (1) attached to the central part of the housing and a funnel-shaped intake sleeve (2) inserted into the flange (1) from the inside. An O-ring (3) is arranged between the flange (1) and the sleeve (2), which provides the seal.
[0005] The housing is made of plastic and requires modification of the central section for installation, particularly machining of the existing opening. Its funnel-shaped design ensures efficient airflow and allows for flexible adaptation to carburetors with larger connection diameters. The appearance of the sleeve may vary depending on the carburetor type. Advantages of the invention
[0006] The device offers the following advantages in particular: • Adaptation to larger carburetor connections • Secure sealing thanks to O-ring • Flow-optimized transition between housing and carburetor • Noise reduction through the use of the original air filter and intake system • Retrofitting possible by modifying the housing center section Example of implementation
[0007] In a preferred embodiment, the assembly comprises an intake flange (1) on the central housing section and a flexible, funnel-shaped intake sleeve (2) inserted into the flange (1) from the inside. An O-ring (3) is arranged between the intake flange (1) and the intake sleeve (2), which sits in a circumferential groove and ensures a reliable seal. The flexibility of the intake sleeve (2) facilitates insertion, allows for secure adaptation to the flange (1), and ensures a vibration-independent seal. The funnel shape directs the airflow efficiently towards the carburetor, thus enabling the use of carburetors with larger connection diameters. The design retains the original air intake path, resulting in significantly lower noise levels compared to open air filters. Drawing description Fig. 1: a side view of the assembly with intake flange (1) and inserted flexible, funnel-shaped intake sleeve (2) and section AA: a longitudinal section through the intake flange (1) with the flexible intake sleeve (2) and the seal by means of an O-ring (3), Fig. 2: Another perspective view of the structure from a different angle. Fig. 3: a front and side view of the intake flange (1), Fig. 4: a front and bottom view of an exemplary intake manifold (2).
Claims
[1] Design of an air intake device for mopeds, in particular SIMSON models S50, S51, S53 and S70, characterized by an intake flange (1) attached to the central part of the housing, into which a flexible, funnel-shaped intake sleeve (2) is inserted from the inside, wherein an O-ring (3) is arranged between the flange (1) and the intake sleeve (2) for sealing. [2] Structure according to claim 1, characterized by , that the O-ring (3) is arranged in a circumferential groove of the intake sleeve (2) or the flange (1). [3] Structure according to one of claims 1 or 2, characterized by , that the funnel-shaped design of the flexible intake sleeve (2) results in a flow-friendly airflow towards the carburetor.