Engine braking device having return function, and engine

By laterally incorporating elastic elements and limiting parts into the engine braking device, the problem of excessively large vertical dimensions of the device is solved, resulting in a smaller overall size and better braking performance, thus avoiding collisions and reducing fuel consumption.

WO2026123510A1 Publication Date: 2026-06-18ZHEJIANG LIMING INTELLIGENT MFG CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
ZHEJIANG LIMING INTELLIGENT MFG CO LTD
Filing Date
2025-04-03
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

The existing engine braking device is too large in the vertical direction, which may cause it to collide with the engine cover or make it impossible to install, thus affecting the braking effect.

⚗Method used

An engine braking device with a return function was designed. By setting the elastic element and the limiting part laterally, the vertical dimension of the device is reduced. The limiting part precisely controls the gap between the rolling part and the camshaft, thereby reducing frictional power consumption and improving braking effect.

🎯Benefits of technology

It effectively reduces the overall size of the engine braking device in the vertical direction, avoids collisions with other engine components, reduces fuel consumption, and improves braking performance and assembly efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

An engine braking device having a return function, and an engine. The engine braking device comprises: a camshaft (10), comprising an auxiliary cam (11) having a non-working surface (111) and a working surface (112) thereon; a brake rocker arm (20) and a rocker arm shaft (30), the brake rocker arm (20) being provided with a limiting portion thereon; a movable unit (40), comprising a sliding portion (41) and a rolling portion (42); a rocker arm support (50), provided with a first connection portion (51); a return spring bracket (60), one end thereof being connected to the first connection portion (51), and the other end thereof being provided with a return spring seat (70); and an elastic member (80), arranged transversely and clamped between the return spring seat (70) and the limiting portion. During engine braking, when the rolling portion (42) is in contact with the non-working surface (111), the distance between the return spring seat (70) and the limiting portion is minimal; and during engine braking, when the rolling portion (42) is in contact with the working surface (112), the distance between the return spring seat (70) and the limiting portion is maximal. In said engine, the elastic member (80) is arranged transversely, thereby reducing the overall vertical dimension of the entire engine braking device.
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