ENERGY MANAGEMENT METHOD ON A HYBRID VEHICLE COMPRISING A TRANSMISSION WITH DISCRETE RATIOS

• US 20160297420A1
• Filed: 11/04/2014
• Published: 10/13/2016
• Est. Priority Date: 12/03/2013
• Status: Active Grant

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: MIRO-PADONAVI, Thomas, DEBERT, Maxime, CHAMAILLARD, Yann, COLIN, Guillaume
• Granted Patent: US 9,902,391 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60K 6/20 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/11 Stepped gearings
• CPC Class Codes: B60W 20/11 using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance utilising navigation and traffic information in the control strategy B60W20/12
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 10/84 Data processing systems or methods, management, administration

Abstract

A method manages energy of a power unit of a hybrid vehicle. The power unit includes at least one internal combustion engine and an electric drive machine, coupled to wheels of the vehicle by a transmission with discrete ratios. The method includes minimizing, at each operating point of the energy, an energy criterion linked to a sum of consumption of the internal combustion engine and an electrical consumption of the electrical machine multiplied by an equivalence factor weighting a supply of energy from the internal combustion engine and a supply of energy of electrical origin. The minimized criterion is a mixed criterion which is a sum of an energy criterion and a discomfort criterion linked to management of kinematic modes of the transmission.

Claims

1-8. -8. (canceled)

9. A method for managing energy of a power unit of a hybrid vehicle, the power unit comprising at least one internal combustion engine and an electric drive machine, coupled to wheels of the vehicle by a transmission with discrete ratios, comprising:

minimizing, at each operating point of the energy, an energy criterion linked to a sum of consumption of the internal combustion engine and an electrical consumption of the electrical machine multiplied by an equivalence factor weighting a supply of energy from the internal combustion engine and a supply of energy of electrical origin,

wherein the minimized criterion is a mixed criterion which is a sum of an energy criterion and a discomfort criterion linked to management of kinematic modes of the transmission.

10. The energy management method as claimed in claim 9, wherein the discomfort criterion is proportional to the energy criterion.

11. The energy management method as claimed in claim 10, wherein the discomfort criterion is a product of the energy criterion and a comfort penalty linked to a possible change of kinematic mode of the transmission.

12. The energy management method as claimed in claim 9, wherein the discomfort criterion is expressed as an absolute value.

13. The energy management method as claimed in claim 11, wherein the comfort penalty is a product of a calibration constant by a square matrix which contains a penalty of transition between each of the changes of the kinematic modes of the transmission.

14. The energy management method as claimed in claim 13, wherein the penalty for transition between the kinematic modes is based on a sequence of operations specific to the transition concerned.

15. The energy management method as claimed in claim 14, wherein the sequence of operations for the transition between two kinematic modes includes:

synchronization of the electrical machine,

synchronization of the internal combustion engine,

starting of the internal combustion engine,

stoppage of the internal combustion engine, or

an interruption in torque.

16. The energy management method as claimed in claim 9, wherein the kinematic transmission modes include at least two ratios in electric mode and two ratios in hybrid mode.