Accumulator assisted hydrostatic driveline and optimization method thereof

US10233949B2 · kind B2 · utility

Assignee

• DANA BELGIUM N.V. · BE

Inventors

• Mark R. J. Versteyhe · Beernem, BE
• Mathieu P E Dutre · Varsenare, BE
• Veerle Vandoorsselaere · Evergem, BE
• Bart De Beer · Brugge, BE
• Bruno Meertens · Loppem, BE
• Thomas J. Vyncke · Deinze, BE
• Jonas De Kooning · Evergem, BE

Key dates

• Filing date: Nov 18, 2016
• Grant date: Mar 19, 2019
• Expiry date: Apr 27, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/62
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method for minimizing a fuel consumption rate of a vehicle and a method for tracking an optimal state of charge function for a hydrostatic accumulator are provided. The first method includes the steps of providing a motor and pump, determining an efficiency of the motor and pump using an efficiency map, providing a power source, and controlling the motor independent from the pump with a controller. The controller employs the efficiency of the motor and the pump to minimize the fuel consumption rate of the vehicle. The second method includes the steps of determining the optimal state of charge control function, calculating an optimal state of charge of the hydrostatic accumulator, determining a state of charge error, calculating a corrective value, and adjusting a state of a charge based on the corrective value and the state of charge error by adjusting the charge of the hydrostatic accumulator.