A Study Towards the Removal of the Relay Rod in Volvo Trucks: Exploring Solutions for Steering the Second Front Axle in a Future Double Front Axle Arrangement by Wire

Abstract

The study explores the removal of the relay rod in Volvo Trucks, specifically focusing on the front axle arrangement with two nondriven steered front axles (FAA20). The relay rod, a mechanical link between the axles in the steering system, presents structural and manufacturing challenges. The investigation aims to replace the currently in production mechanical system with a system that includes individual steering of the first and second axle. The report details the methodology used, including concept generation, risk analysis, and simulations. Seven concepts were evaluated, with Concept 7 identified as the optimal solution. The study concludes a proposed layout of the steering system and a ratio between the first and the second front axle to facilitate efficient steering.