Wilhelm Johannesson

Title: Wilhelm Johannesson and Vehicle Powertrain Control

Introduction

Wilhelm Johannesson is an inventor associated with Gothenburg, Sweden, and Volvo Truck Corporation. His patent work addresses vehicle powertrain control, with a focus on balancing potential fuel savings against the energy and fuel required to restart an engine.

Latest Patents

The supplied information lists one patent for Johannesson: System and method for controlling a powertrain system of a vehicle. The invention describes a computer system that can operate a vehicle’s powertrain in different modes, including freewheeling, where the engine is disconnected from the drive wheels and its output shaft is not rotating.

Before entering freewheeling mode, the system predicts the fuel that could be saved using engine-idle fuel-consumption data. It also estimates the kinetic energy lost while the engine is stopped, the energy needed to restart it using a controllable clutch, and the fuel required to recover that energy. The system compares the predicted fuel saving with the predicted fuel cost, then uses that comparison to decide whether to enter freewheeling mode. Johannesson’s listed patent count is 1 patent.

Career Highlights

Johannesson’s listed work connects him with Volvo Truck Corporation and vehicle powertrain technology. The patent’s approach uses predictive control to determine when freewheeling may provide a net fuel benefit.

Collaborations

The supplied information names Markus Schellenberger and Henrik Ryberg as Johannesson’s coworkers. Their specific roles in the patent or related work are not provided.

Conclusion

Wilhelm Johannesson’s listed patent presents a predictive method for controlling vehicle freewheeling by weighing potential fuel savings against the costs of restarting and recovering engine energy.