Multi-Motor Opening Device for Vehicle Doors
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Solution Overview
Problem
Existing opening devices for motor vehicle doors face challenges in providing high drive power within limited installation space, leading to increased forces required for opening and delayed or slow opening processes due to the weight of modern vehicle doors and the need for large, powerful electric motors.
Innovation Solution
The use of two or more compact electric motors jointly acting on a transmission element, such as a drive disk with toothing, to provide cumulative drive power, allowing for a compact and flexible design that optimizes installation space and reduces weight and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single large electric motor is used to provide high drive power, then the required power is achieved, but the installation space and weight increase significantly
Solution Approach 1:
The patent divides the single large electric motor into multiple smaller electric motors (at least two) that collectively provide the required drive power. Each motor connects to the transmission element through a differential mechanism, allowing the system to achieve the same total power output as a single large motor while occupying significantly less installation space and reducing weight.
2Speed
If a gearbox with large reduction ratio is used to increase opening speed, then the opening process accelerates, but the device complexity and installation space increase
Solution Approach 1:
The patent replaces the traditional mechanical gearbox with a differential mechanism that directly couples the electric motors to the transmission element. This substitution eliminates the need for complex gear reduction stages while still achieving the required speed multiplication through the differential's inherent mechanical advantage, thereby reducing device complexity and installation space.
3Object-affected harmful factors
If modern vehicle doors are closed tightly to reduce noise, then noise isolation is improved, but the force required to open the door increases
Solution Approach 1:
The patent employs multiple electric motors that can apply force progressively to overcome the tightly closed door. The differential mechanism distributes the opening force across multiple motor outputs, allowing the system to build up sufficient opening force gradually while maintaining the tight closed position for noise isolation. The cumulative effect of multiple motors provides the necessary force without requiring an excessively large single motor.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables high drive power and fast opening speeds while maintaining a compact design, facilitating easier installation and reducing the weight and cost of the opening device, even in tight spaces.
Implementation Method 1
an electric motor drive which has at least one electric motor and also has at least one transmission element rotationally driven thereby
Data Source
AI summary
An opening device is provided for a movable motor vehicle element, for example a motor vehicle door, a motor vehicle door handle, a motor vehicle fuel tank door, or the like. For this purpose, the opening device is equipped with an electric motor drive which has at least one electric motor and also has at least one transmission element rotationally driven by the at least one electric motor, said transmission element being provided for acting upon the movable motor vehicle element. According to the invention, the transmission element is rotationally acted upon by means of two or more electric motors jointly.