Crankshaft with double crank web rotary valve function
DE202026001984U1Undetermined Publication Date: 2026-07-30MICHAEL CRAMER & CHRISTOPH CRAMER GBR (VERTRETUNGSBERECHTIGTE GESELLSCHAFTER MICHAEL CRAMER 88131 BODOLZ & CHRISTOPH CRAMER 88131 BODOLZ)
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Patent Information
- Application Number
- DE202026001984
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-30
- Estimated Expiration
- 2036-04-30
Abstract
- Main claim: Crankshaft (1) for a crankcase-scavenged two-stroke internal combustion engine with fresh gas intake on the housing side opposite the connecting rod descent, characterized in that a) both crank webs (1a, 1b) have control surfaces (2a, 2b) which act as active rotary valve control edges for the fresh gas intake into the crankcase, b) the fresh gas intake takes place radially in the direction of rotation of the crankshaft (1) on the housing side opposite the connecting rod descent in the crank angle range of 90° to 135° before top dead center (TDC), c) an air gap (s) of at least 0.04 mm and at most 0.10 mm is provided between the control surfaces (2a, 2b) and the corresponding housing surfaces, and d) each crank web (1a, 1b) interacts with a separate, associated intake chamber in the engine housing.
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Citation Information
Patent Citations
Flat disc type valve arrangement
EP2758640B1
Stratified scavenged two-stroke engine
US7093570B2
Two-stroke engine and a method for the operation thereof
US8967101B2
DE10396984A1