Compact layout structure of two-stroke horizontally opposed engine

By tilting the slanted air intake seat and starter motor, the layout structure of the two-stroke horizontally opposed engine is optimized, solving the problems of large radial dimensions and high center of gravity of the equipment. This achieves a flattened overall design and a lower center of gravity, improving the portability and operational stability of the equipment.

CN122447192APending Publication Date: 2026-07-24WUHU HANGDONG TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610695741.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-20
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing two-stroke horizontally opposed engines have large radial dimensions, high center of gravity, easy component interference, and poor portability, resulting in difficulties in carrying the equipment and unstable operation, especially in complex terrain and emergency scenarios where deployment efficiency is low.

Method used

By tilting the slanted intake seat, the intake end component and the starter motor are placed on the same side of the engine, offsetting their projections on the plane perpendicular to the crankshaft rotation axis. This optimizes the overall layout, reduces radial dimensions and longitudinal height, and uses an overrunning clutch to mitigate starting shock, achieving a low center of gravity and a compact structure.

Benefits of technology

It significantly reduces the overall size of the machine, improves portability and operational stability, lowers the center of gravity, enhances operational stability on slopes and in vibrating environments, improves the machine's maneuverability and safety in confined spaces, and reduces the failure rate.

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Abstract

The invention discloses a compact layout structure of a two-stroke horizontally opposed engine. According to the scheme, the device mainly comprises horizontally opposed engines, an inclined air inlet seat, a reed type air inlet valve, an air inlet tail end component and a starting motor; the two ends of the oblique air inlet seat are communicated with an air inlet and the outer side of a crankcase respectively, the connecting line of center projections of the two ends of the air inlet seat and the radial line of a crankshaft form an acute included angle, the starting motor and the oblique air inlet seat are arranged on the same side, and the air inlet tail end component and the projection of the starting motor are at least partially staggered through an oblique structure to be matched with and limit the air inlet and exhaust axis space included angle. By optimizing the spatial staggered layout of parts on the same side and compressing the radial boundary dimension of the engine, flat low-gravity-center arrangement is achieved, the structure is compact, operation stability is high, and the engine is suitable for water pumps, aviation, ships and various types of portable power equipment.
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