Integrated Parking Lock Actuator With Hydraulic Multi-Function Control
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Solution Overview
Problem
Existing actuators for motor vehicle drive trains, such as EPAs, face challenges in effectively utilizing available space for integrating an actuation cylinder within the drive train, limiting the efficient performance of parking lock mechanisms and additional vehicle functions like lubrication and temperature control.
Innovation Solution
The actuator integrates an actuation cylinder rigidly connected to a hydraulic unit with a hydraulic pump and/or valves driven by an electric motor, featuring a piston and electromagnetic holding device, allowing for mechanical actuation of the parking lock and hydraulic control of other components, with a control unit for centralized control of all components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If an actuation cylinder is integrated into the actuator, then space utilization is improved, but device complexity increases
Solution Approach 1:
The actuation cylinder is integrated into the actuator housing, merging the mechanical actuation function with the hydraulic control unit into a single compact assembly. This eliminates the need for separate external connections and reduces overall space requirements while maintaining all necessary functions.
Solution Approach 2:
The actuator is designed to perform multiple functions: hydraulic control of drive train components, mechanical actuation of the parking lock mechanism, and lubrication/temperature control. This multi-functionality is achieved by integrating the actuation cylinder into the hydraulic unit, allowing one device to replace what would traditionally require separate components.
2Stability of the object's composition
If the actuation cylinder is rigidly connected to the hydraulic unit, then structural stability is improved, but manufacturing complexity increases
Solution Approach 1:
The actuation cylinder is rigidly connected to the hydraulic unit housing, creating a stable integrated structure. This merging of components provides structural stability for reliable operation while the design allows for modular assembly that can simplify the manufacturing process.
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 integration enhances space utilization, enables efficient mechanical actuation of parking locks and hydraulic control of drive train components, reducing the need for external connections and separate control boards, while allowing for lubrication and temperature control through hydraulic fluid management.
Implementation Method 1
The hydraulic pump (56) generates corresponding pressures or volume flows at hydraulic connections (50) of the hydraulic unit (12)
Implementation Method 2
the actuation cylinder (14) has an electromagnetic holding device (46) for holding the actuating element (28) in a position
Data Source
AI summary
An actuator for actuating a parking lock and for carrying out at least one other vehicle function in a motor vehicle includes a hydraulic unit and an actuation cylinder, rigidly connected to the hydraulic unit. The hydraulic unit has a hydraulic pump or valves driven by an electric motor. The actuation cylinder is for mechanically actuating a parking lock mechanism of the parking lock. In some embodiments, the actuator has an actuator housing and the actuation cylinder has a cylinder housing that is part of the actuator housing. In some embodiments, the actuation cylinder has a piston and an actuating element, movable via the piston, for actuating the parking lock mechanism.