Motor Vehicle Lock Coupling for Pawl Reset After Blocking
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Solution Overview
Problem
The existing motor vehicle lock faces challenges in ensuring operational safety due to potential blocking, canting, or catching of components in the raised position of the locking pawl, which can hinder the reliable transfer of the locking pawl into the lowered position, thereby compromising the closure and locking mechanism.
Innovation Solution
The motor vehicle lock incorporates a coupling arrangement between the operating lever and the locking pawl, allowing for uncoupling from the locking pawl, and between the opening device and the locking pawl, enabling the locking pawl to be transferred back into the lowered position, even in the event of a malfunction, thus enhancing operational safety and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the opening device is coupled to the locking pawl to enable motorized raising, then the operational comfort is improved, but the risk of blocking or catching in the raised position increases
Solution Approach 1:
The coupling arrangement is divided into two independent coupling paths: one between the opening device and the locking pawl, and another between the operating lever and the locking pawl. This segmentation allows the system to switch between motorized operation and manual operation, reducing the risk of complete failure due to blocking or catching in one path.
Solution Approach 2:
The coupling arrangement can change its operational state between engaged and disengaged positions, allowing the system to switch between motorized raising (engaged) and manual raising (disengaged). This parameter change enables the system to adapt to different operational conditions and avoid the harmful effects of blocking or catching.
2Reliability
If the coupling arrangement is designed to allow uncoupling, then the operational safety is improved, but the device complexity increases
Solution Approach 1:
The coupling arrangement combines multiple functions into a single mechanism: it couples both the opening device and the operating lever to the locking pawl, and provides automatic disengagement capability. This merging reduces the need for separate complex disengagement mechanisms while maintaining operational safety.
Solution Approach 2:
The coupling arrangement serves multiple functions: it enables motorized raising, enables manual raising, and provides automatic disengagement protection. This multi-functionality reduces the need for additional separate components, thereby managing complexity while improving safety.
3Reliability
If the opening device is always coupled to the locking pawl, then the motorized operation reliability is improved, but the ability to handle blocking situations deteriorates
Solution Approach 1:
The coupling arrangement is designed to be dynamic rather than static, allowing it to switch between engaged and disengaged states. This dynamics enables the system to adapt to blocking situations by disengaging the motorized opening device from the locking pawl, preventing the propagation of blocking forces while maintaining the ability to reset and retry.
Data Source
AI summary
A motor vehicle lock with a locking latch and at least one locking pawl, wherein the locking latch is adjustable into an open position and into at least one closed position, wherein the motor vehicle lock has an operating lever, wherein a coupling arrangement is arranged between the operating lever and the locking pawl, said coupling arrangement being switchable between an engaged state and a disengaged state, wherein the motor vehicle lock has an opening device with a motorized opening drive with at least one drive direction which in an opening movement adjusts an actuating arrangement of the opening device, starting from an initial position of the actuating arrangement, such that the actuating arrangement operates an opening lever of the opening device which is pivotable about an opening lever axis, such that the locking pawl can be transferred by an operating stroke of the opening lever into a raised position.