Method and system for starting an internal combustion engine of a hybrid vehicle

US11110910B2 · kind B2 · utility

Assignee

• VOLVO CAR CORPORATION · SE

Inventors

• Andreas Eriksson · Tumba, SE
• Andreas Jansson · Danderyd, SE
• Jonas Forssell · Torslanda, SE
• Mathias Gylling · Torslanda, SE
• Mats Bohman · Layton, US
• Mattias Kroon · Torslanda, SE

Key dates

• Filing date: Feb 26, 2019
• Grant date: Sep 7, 2021
• Expiry date: Jan 9, 2040

Classification

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

Abstract

Method and system for starting an internal combustion engine of a hybrid vehicle, adapted to rotate a drive shaft providing torque via a transmission unit comprising a first clutch connecting the engine to an input shaft of a gearbox connected to a torque converter connected to a second clutch connecting the torque converter to the at least one driving wheel, where the input shaft is connected to an electric machine; the method comprising: disengaging the second clutch to a predetermined torque level such that there is a slip in the second clutch; engaging the lock-up clutch; engaging the first clutch to bring the engine to a first rotational speed; disengaging the first clutch when the engine has reached the first rotational speed; starting the engine, and engaging the first clutch when the engine has started and rotates with a second rotational speed.