Control device and method for determining a p-V characteristic of at least one wheel brake cylinder of a brake system of a vehicle

US12384350B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Maximilian Luka · Bad Friedrichshall, DE
• Dirk Foerch · Fürstenau, DE
• Mario Seiler · Unterheinriet, DE
• Nico Pflueger · Schwetzingen, DE
• Nikolai Mueller · Stuttgart, DE
• Robin Gruenagel · Neuenstadt am Kocher, DE

Key dates

• Filing date: Oct 25, 2021
• Grant date: Aug 12, 2025
• Expiry date: Aug 16, 2042

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60T2270/406
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for determining a p-V characteristic of at least one wheel brake cylinder of a brake system of a vehicle. The method includes: increasing a pressure prevailing in the wheel brake cylinder during a measurement time interval, wherein a volume variable that reflects a present volume in the wheel brake cylinder, and a pressure variable that reflects a present pressure in the wheel brake cylinder, are determined at least once during the measurement time interval, and setting the p-V characteristic of the wheel brake cylinder taking into consideration the volume variable and the pressure variable. Before the measurement time interval, during a pressure increase interval, a pressure exerted on the closed wheel inlet valve and/or the closed isolating valve is increased with an average pressure build-up gradient greater than or equal to 50 bar/second up to a limit pressure of greater than or equal to 25 bar.