METHOD FOR CONTROLLING THE ELECTRIC MOTOR OF A HYBRID OR ELECTRIC VEHICLE

• US 20100019709A1
• Filed: 12/07/2007
• Published: 01/28/2010
• Est. Priority Date: 12/13/2006
• Status: Abandoned Application

• Current Assignee: Peugeot Citroen Automobiles SA (Stellantis NV)
• Original Assignee: Peugeot Citroen Automobiles SA (Stellantis NV)
• Inventors: Guerin, Stephane, Colledani, Frederic, Le Neindre, Yvan
• Application Number:
  US12/519,158
• Publication Number:
  US 20100019709A1
• Time in Patent Office: Days
• US Class Current: 318/400.230
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/486 Operating parameters
• CPC Class Codes: B60L 2240/507 Operating parameters
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• 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 20/11 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: B60W 20/15 Control strategies specially adapted for achieving a particular effect
• CPC Class Codes: B60W 2030/203 related or induced by the clutch
• CPC Class Codes: B60W 2050/0052 Filtering, filters
• CPC Class Codes: B60W 2510/083 Torque
• CPC Class Codes: B60W 2510/1015 Input shaft speed, e.g. turbine speed
• CPC Class Codes: B60W 2510/104 Output speed
• CPC Class Codes: B60W 2710/08 Electric propulsion units
• CPC Class Codes: B60W 30/20 Reducing vibrations in the driveline
• CPC Class Codes: G05B 5/01 electric
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• 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 10/72 : Electric energy management in electromobility

Abstract

The invention relates to a method for controlling the electric motor of a hybrid or electric vehicle. The method is intended for controlling the electric motor driving the transmission shaft of a vehicle, wherein the motor applies to the transmission shaft a torque having a value corresponding to a torque set-point applied to said electric motor. The torque set-point is corrected by subtracting a correction signal obtained by the application of a band-pass filtration-type processing to a signal representative of the transmission-shaft rotational instant speed, within a frequency band including the frequency of a particular oscillation mode of the vehicle traction chain. The invention can be used for reducing jolts resulting from a discontinuity in the torque applied to the transmission shaft.

Claims

1. Control method for an electric motor that drives a transmission shaft of a motor vehicle, this motor applying to the transmission shaft a torque with a value corresponding to a torque setpoint applied to this electric motor, characterized in that the torque setpoint is corrected by subtracting a correction signal obtained by processing a signal representing the instantaneous rotational speed of the transmission shaft using bandpass filtration within a frequency band that includes a frequency of a normal mode of oscillation of the vehicle drivetrain.

2. Method according to claim 1, wherein the filtration comprises the successive application of two or three stepped bandpass filters.

3. Method according to claim 1, wherein the amplitude of the correction signal depends on the gearbox ratio that is engaged.

4. Method according to claim 1, wherein the amplitude of the correction signal depends on whether a clutch connected to the transmission shaft is in the closed or open state.

5. Method according to claim 3, wherein the filtration is performed with bandpass filters that have bandwidths based on the gear ratio engaged and/or whether the clutch is in the open or closed state.

6. Electric-type vehicle comprising an electric motor that drives the rotation of a transmission shaft (AP), and control means for the electric motor employing the method according to claim 1.

7. Parallel hybrid-type vehicle comprising an electric motor that drives the rotation of a transmission shaft, a heat engine and a clutch for coupling and uncoupling the heat engine and the transmission shaft, and a gearbox driven by the transmission shaft, as well as control means employing the method according to claim 1.

8. Method according to claim 2, wherein the amplitude of the correction signal depends on the gearbox ratio that is engaged.

9. Method according to claim 2, wherein the amplitude of the correction signal depends on whether a clutch connected to the transmission shaft is in the closed or open state.

10. Method according to claim 3, wherein the amplitude of the correction signal depends on whether a clutch connected to the transmission shaft is in the closed or open state.

11. Method according to claim 8, wherein the amplitude of the correction signal depends on whether a clutch connected to the transmission shaft is in the closed or open state.

12. Method according to claim 4, wherein the filtration is performed with bandpass filters that have bandwidths based on the gear ratio engaged and/or whether the clutch is in the open or closed state.

13. Method according to claim 9, wherein the filtration is performed with bandpass filters that have bandwidths based on the gear ratio engaged and/or whether the clutch is in the open or closed state.

14. Method according to claim 10, wherein the filtration is performed with bandpass filters that have bandwidths based on the gear ratio engaged and/or whether the clutch is in the open or closed state.

15. Method according to claim 11, wherein the filtration is performed with bandpass filters that have bandwidths based on the gear ratio engaged and/or whether the clutch is in the open or closed state.

16. Electric-type vehicle comprising an electric motor that drives the rotation of a transmission shaft (AP), and control means for the electric motor employing the method according to claim 2.

17. Parallel hybrid-type vehicle comprising an electric motor that drives the rotation of a transmission shaft, a heat engine and a clutch for coupling and uncoupling the heat engine and the transmission shaft, and a gearbox driven by the transmission shaft, as well as control means employing the method according to claim 2.

18. Parallel hybrid-type vehicle comprising an electric motor that drives the rotation of a transmission shaft, a heat engine and a clutch for coupling and uncoupling the heat engine and the transmission shaft, and a gearbox driven by the transmission shaft, as well as control means employing the method according to claim 3.

19. Parallel hybrid-type vehicle comprising an electric motor that drives the rotation of a transmission shaft, a heat engine and a clutch for coupling and uncoupling the heat engine and the transmission shaft, and a gearbox driven by the transmission shaft, as well as control means employing the method according to claim 4.

20. Parallel hybrid-type vehicle comprising an electric motor that drives the rotation of a transmission shaft, a heat engine and a clutch for coupling and uncoupling the heat engine and the transmission shaft, and a gearbox driven by the transmission shaft, as well as control means employing the method according to claim 5.