Control system for operating an active chassis of a motor vehicle

The control system for motor vehicle active suspension uses a high-voltage battery with a DC/DC converter to convert to low-voltage levels, integrating separate actuator units and electrical lines, addressing safety and cost-effectiveness in active suspension systems.

DE102024104140B4Active Publication Date: 2026-06-11DR ING H C F PORSCHE AG
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Patent Information

Application Number
DE102024104140
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-02-14
Publication Date
2026-06-11
Estimated Expiration
2044-02-14

AI Technical Summary

Technical Problem

Existing active suspension systems for motor vehicles face challenges in achieving a safe and cost-effective design, particularly in managing energy efficiency and electrical safety during high-voltage battery failures and crash scenarios.

Method used

A control system utilizing a high-voltage battery connected to a DC/DC converter for converting voltage to a low-voltage level, with separate actuator units and electrical lines, eliminating hydraulic lines and enabling a simplified power grid topology, ensuring safe and cost-effective operation.

Benefits of technology

This approach enhances energy efficiency, reduces manufacturing complexity, ensures safe electrical operation in crashes, and maintains driving safety by preserving low-voltage battery energy for essential functions.

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Abstract

Control system (10) for operating an active chassis of a motor vehicle, with a high-voltage battery (18) for the electric drive of the motor vehicle, a control unit (16) connected to the high-voltage battery (18) for the operation of an actuator unit (30) of a wheel suspension (12) assigned to a wheel (14) of the motor vehicle, wherein the actuator unit (30) has its own separate actuating motor (28) for the hydraulic operation of the wheel suspension (12), a DC voltage converter (22) for converting the voltage provided by the high-voltage battery (18) to a low-voltage level and electrical lines (26) connected to the control unit (16) and / or to the DC voltage converter (22) for supplying the actuating motor (28) of the respective actuator unit (30) with electrical energy at the low-voltage level.
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