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Last updated February 1, 2026
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Stepless friction door limiter: BYDRecent Research Landscape

Standard notched limiters restrict door positioning to fixed increments, leading to user inconvenience and potential collision risks in tight spaces. These mechanisms employ variable friction or hydraulic resistance to enable infinite positioning and stable hold points.

What technical problems is BYD addressing in Stepless friction door limiter?

Uncontrolled door swing movement

(69)evidences

Standard hinges lack the ability to hold a door at arbitrary angles, leading to unintended closing or over-extension. Eliminating fixed stop positions allows for safer vehicle ingress and egress in confined spaces.

Uncontrolled door swing movement

(66)evidences

Standard door hinges lack precise positioning and can swing unexpectedly due to gravity or wind. Restricting this movement prevents vehicle damage and improves passenger safety.

Passenger fall risk

(28)evidences

Sudden or unintended door motion poses safety risks and mechanical wear. Precise control over opening and closing forces prevents structural damage and user injury.

Unintended handle protrusion drag

(26)evidences

Standard door hinges lack precise positioning and can swing uncontrollably due to gravity or wind. Eliminating fixed detent positions allows for safer vehicle ingress and egress in confined spaces.