Method of providing a scenario-based overlay torque request signal in a road vehicle steer torque manager

US11724695B2 · kind B2 · utility

Assignees

• ZENUITY AB · SE
• VOLVO CAR CORPORATION · SE

Inventors

• Niklas Lidander · Mölndal, SE
• Lars JOHANNESSON MÅRDH · Torslanda, SE
• Andreas Carlsson · Mölndal, SE
• Markus Löfgren · Onsala, SE
• Andreas Lindberg · Gothenburg, SE

Key dates

• Filing date: Feb 25, 2020
• Grant date: Aug 15, 2023
• Expiry date: Jan 15, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G06V20/58
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a method of providing a scenario-based overlay torque request signal in a steer torque manager (1) during driver-override of an auxiliary steering assistance system (2) function in a road vehicle (3) having an EPAS system (4). The steer torque manager (1) has a wheel angle controller (1b) for providing an assistance torque request related signal, and a driver-in-the-loop functionality (1a) for determining driver-override and providing a driver-override related signal. The method comprises receiving signals related to: assistance torque request; driver-override; road vehicle velocity; steering pinion angle; distance to an adjacent lane marker (5a, 5b); and distance to an adjacent potential threat object (6), and producing, from the received signals, during ongoing driver-override, a signal representative of a resistance torque request corresponding to one of a finite number of pre-defined scenarios for different signal combinations, and producing the scenario-based steering wheel overlay torque request signal through combining the assistance torque request and the resistance torque request signals.