System and method for reducing throttling losses during regenerative braking

• US 7,604,076 B2
• Filed: 02/19/2007
• Issued: 10/20/2009
• Est. Priority Date: 02/19/2007
• Status: Active Grant

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Chrysler Group LLC (Stellantis NV)
• Inventors: Anderson, Donald D.
• Primary Examiner(s): PHAN, HAU VAN
• Application Number:
  US11/676,354
• Publication Number:
  US 20080200305A1
• Time in Patent Office: 974 Days
• Field of Search: 180/65.2, 180/65.3, 180/65.8, 180/65.6, 180/168, 180/169, 180/170, 180/65.21, 180/65.31, 180/65.28, 701/96, 701/22, 701/93, 903/903, 903/910, 903/906
• US Class Current: 180/65.28
• CPC Class Codes: B60K 6/24 characterised by the combustion engines
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 2220/20 DC electrical machines
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/461 Speed
• CPC Class Codes: B60L 2240/486 Operating parameters
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 7/18 Controlling the braking effect B60L7/12, B60L7/14, B60L7/16 take precedence
• CPC Class Codes: B60L 7/26 Controlling the braking effect
• 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 10/18 including control of braking systems
• CPC Class Codes: B60W 10/24 including control of energy storage means
• 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 2520/28 Wheel speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2710/0605 Throttle position
• CPC Class Codes: B60W 2710/0616 : Position of fuel or air injector
• CPC Class Codes: B60W 30/18127 : Regenerative braking
• 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
• CPC Class Codes: Y02T 10/92 : Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

A control system for a hybrid vehicle includes a regenerative braking module that controls regenerative braking of the hybrid vehicle. Regenerative braking is controlled when an accelerator device is not engaged. A throttle-by-wire control module controls a throttle valve. The throttle-by-wire control module opens the throttle valve and/or holds the throttle valve open in response to regenerative braking module signals when a transmission of the hybrid vehicle is in gear.

Claims

1. A control system for a hybrid vehicle comprising:

a regenerative braking control module that controls regenerative braking of the hybrid vehicle when an accelerator device of the hybrid vehicle is not engaged;

an engine control module that controls fuel flow to an engine based on a signal from the acceleration device; and

a throttle-by-wire control module that controls a throttle valve of the engine, wherein the throttle-by-wire control module opens said throttle valve and holds said throttle valve open in response to regenerative braking module signals when a transmission of the hybrid vehicle is in gear and when said engine control module shuts off fuel to said engine.

2. The system of claim 1 wherein said accelerator device comprises an accelerator pedal.

3. The system of claim 1 further comprising:

said transmission, wherein said transmission is in said gear when said transmission is in only one of a reverse gear and a drive gear.

4. The system of claim 1 further comprising:

a battery array; and

an electric motor that recharges said battery array during said regenerative braking.

5. The system of claim 1 wherein said throttle-by-wire control module fully opens said throttle valve and holds said throttle valve fully open in response to said regenerative braking module signals.

6. A control system for a hybrid vehicle comprising:

an accelerator pedal;

an accelerator pedal sensor that senses movement of said accelerator pedal;

a throttle valve;

an engine that is responsive to control of said throttle valve;

an engine control module that controls fuel flow to said engine based on accelerator pedal sensor signals;

a transmission;

a regenerative braking module that controls regenerative braking of the hybrid vehicle based on said accelerator pedal sensor signals; and

a throttle-by-wire control module that opens said throttle valve and holds said throttle valve open in response to regenerative braking module signals when said transmission is in gear and when said engine control module shuts off fuel to said engine.

7. The system of claim 6 wherein said transmission is in said gear when said transmission is in only one of a reverse gear and a drive gear.

8. The system of claim 6 further comprising:

a battery array; and

an electric motor that recharges said battery array during said regenerative braking.

9. The system of claim 6 wherein said throttle-by-wire control module fully opens said throttle valve and holds said throttle valve fully open in response to said regenerative braking module signals.

10. The system of claim 6 further comprising:

friction brakes that slow the vehicle; and

a brake control module that controls said friction brakes.

11. A method for controlling a hybrid vehicle system comprising:

sensing movement of an acceleration pedal and generating acceleration commands based on said movement;

controlling regenerative braking of the hybrid vehicle based on the acceleration commands;

shutting off fuel to an engine of the hybrid vehicle during said regenerative braking; and

opening a throttle valve during said regenerative braking when a transmission of the vehicle is in gear and fuel to the engine has been shut off.

12. The system of claim 11 further comprising assisting said regenerative braking with friction braking.

13. The method of claim 11 further comprising recharging a battery array during said regenerative braking.

14. The method of claim 11 further comprising holding said throttle valve fully open until said regenerative braking ends.

15. The method of claim 11 wherein opening said throttle valve further comprising opening said throttle valve fully.

16. The system of claim 11 wherein said transmission is in said gear when said transmission is in one of a reverse gear and a drive gear.