Method and device for controlling an energy equivalence factor in a hybrid motor propulsion plant

• US 9,796,370 B2
• Filed: 03/29/2013
• Issued: 10/24/2017
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: Debert, Maxime, Chamaillard, Yann, Colin, Guillaume
• Primary Examiner(s): Brushaber, Frederick
• Application Number:
  US14/780,231
• Publication Number:
  US 20160052507A1
• Time in Patent Office: 1,670 Days
• 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 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2050/001 Proportional integral [PI] controller
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2555/00 Input parameters relating to exterior conditions, not covered by groups B60W2552/00, B60W2554/00
• CPC Class Codes: B60W 2710/244 Charge state
• CPC Class Codes: Y02T 10/40 Engine management systems
• 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 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/84 Data processing systems or methods, management, administration
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A method of determining an equivalence energy factor representing weighting applied between an infeed of energy of thermal origin and an infeed of energy of electrical origin, to minimize on an operating point overall energy consumption of a hybrid motor propulsion plant for an automotive vehicle including a heat engine and at least one electric motor powered by a battery. This factor is controlled in a discrete manner as a function of an instantaneous state of energy of the battery, and of an energy target, and as a function of the vehicle running conditions.

Claims

1. A method for controlling a distribution of power between a heat engine and an electric machine powered by a battery in a hybrid motor propulsion plant for a motor vehicle, the method comprising:

determining an initial energy equivalence factor representing weighting applied between an infeed of energy of thermal origin from the heat engine and an infeed of energy of electrical origin from the electric machine to minimize at an operating point overall energy consumption of the hybrid motor propulsion plant for a motor vehicle

based on an energy equivalence hypothesis which considers an instantaneous state of energy of the battery, a target energy, and predicted running conditions of the vehicle;

controlling a distribution of power between the heat engine and the electric machine based on the initial energy equivalence factor;

correcting, a posteriori, the energy equivalence hypothesis based on encountered running conditions to provide a corrected energy equivalence factor; and

controlling a distribution of power between the heat engine and the electric machine based on the corrected energy equivalence factor.

2. The method of claim 1, wherein the target energy is dependent on predictions regarding the running conditions.

3. The method of claim 1, further comprising determining an integrated term of an estimation of a state of energy of the battery.

4. The method of claim 3, wherein the integrated term is dependent on the difference between the target energy and the instantaneous state of energy of the battery.

5. The method of claim 4, wherein calculation of the integrated term is looped by an integral proportional calculation regarding a state of charge of the battery.

6. The method of claim 3, wherein the integrated term is looped by an anti-windup factor.

7. The method of claim 1, being pre-compensated by a term dependent on a conversion yield of the electrical energy into mechanical energy.

8. The method of claim 1, further comprising providing a saturator defining a minimum saturation limit and a maximum saturation limit at which forced recharge and discharge modes occur respectively.