Method for operating a coolant circuit of a refrigeration system of a vehicle

US12023991B2 · kind B2 · utility

Assignee

• AUDI AG · DE

Inventors

• Dirk Schroeder · Eckental, DE
• Christian Rebinger · Munich, DE
• Helmut ROTTENKOLBER · Mindelstetten, DE

Key dates

• Filing date: Feb 19, 2020
• Grant date: Jul 2, 2024
• Expiry date: Nov 29, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60H2001/3285
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for operating a coolant circuit of a refrigeration system of a vehicle having multiple system sections. A single pressure sensor is located in each system section. A temperature sensor is arranged downstream at each component to be balanced in the system sections, such as heat exchangers and a coolant compressor. The sensor signals of the pressure and temperature sensors are supplied to a control unit for the control or regulation of the refrigeration system. Furthermore, a pressure approximation value at the position of the temperature sensor is calculated by a pressure loss value determined using a pressure loss calculation function starting from the position of the pressure sensor arranged in the system section of the component up to the position of the temperature sensor if the temperature sensor and the pressure sensor are arranged at different positions in the system section.