Systems and methods for control of transmission and/or prime mover

• US 9,365,203 B2
• Filed: 08/20/2014
• Issued: 06/14/2016
• Est. Priority Date: 08/05/2008
• Status: Active Grant

• Current Assignee: Enviolo BV
• Original Assignee: Fallbrook Intellectual Property Company LLC (Fallbrook Technologies Incorporated)
• Inventors: Keilers, Cyril, Rogers, David Lynn, Diehl, Eric, Orand, Austin, Bartholomew, Mark Edward, Vasiliotis, Christopher M, McDaniel, Loren T, Carter, Jeremy
• Primary Examiner(s): MARC-COLEMAN, MARTHE Y
• Application Number:
  US14/464,245
• Publication Number:
  US 20140365059A1
• Time in Patent Office: 664 Days
• Field of Search: 701/22, 701/51, 180/65.26, 180/65.21, 180/307, 180/65.1, 180/65.285
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/105 of electric type
• CPC Class Codes: B60W 10/108 Friction gearings
• CPC Class Codes: B60W 2510/081 Speed
• CPC Class Codes: B60W 2520/28 Wheel speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/106 Rate of change
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 2710/1005 Transmission ratio engaged
• CPC Class Codes: B60W 2710/248 Current for loading or unloading
• CPC Class Codes: B60W 30/188 Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: F16H 61/6648 controlling of shifting being influenced by a signal derived from the engine and the main coupling
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

Methods of controlling a prime mover and a continuously variable transmission (CVT) are described. The CVT has a group of spherical power adjusters. Each power adjuster has a tiltable axis of rotation. The methods may include optimizing a vehicle having a drive motor and a continuously variable transmission. The CVT has a plurality of spherical power adjusters, each power adjuster having a tiltable axis of rotation. The methods may include optimizing a drive system having a prime mover and a continuously variable transmission.

Claims

1. A vehicle comprising:

a drive motor;

a continuously variable transmission (CVT), the CVT having a plurality of spherical power adjusters, each power adjuster having a liftable axis of rotation; and

a processor coupled to a memory storing a data structure and a set of instructions executable by the processor to perform

receiving, from a user interface, an indication of a desired operating mode selected from a plurality of operating modes, wherein at least one operating mode allows the vehicle to operate in an efficiency mode and at least one operating mode allows the vehicle to operate in a performance mode,

receiving an input associated with a desired vehicle speed,

receiving an input associated with a motor speed,

receiving information associated with the CVT, wherein information includes information from a speed sensor and information from an actuator position sensor,

determining an input speed to the CVT based at least in part on the motor speed and the information associated with the CVT to achieve the desired vehicle speed, and

adjusting a ratio of the CVT based on one or more predefined parameters.

2. The vehicle of claim 1, wherein adjusting a ratio of the CVT comprises:

monitoring a sensor to determine the current draw of the drive motor when operating the CVT and the drive motor at the desired vehicle speed;

comparing the motor current draw to a desired range of current; and

adjusting a ratio of the CVT based at least in part on the comparison of the motor current draw to a desired motor current draw and the desired vehicle speed.

3. The vehicle of claim 1, wherein receiving an input associated with a motor speed comprises:

receiving an input associated with a motor current draw; and

determining, from a table stored in the memory, a motor speed associated with the motor current draw.

4. The vehicle of claim 1, wherein determining an input speed to the CVT comprises creating a table indicative of the relationship between motor current draw and vehicle speed.

5. The vehicle of claim 4, wherein creating a table comprises operating the vehicle for a range of vehicle operating speeds and creating a plurality of tables, wherein each table is created for a predetermined operating parameter of the vehicle.

6. The vehicle of claim 1, wherein receiving an input associated with a desired vehicle speed comprises reading a throttle position.

7. A method of optimizing a vehicle having a drive motor and a continuously variable transmission (CVT), the CVT having a plurality of spherical power adjusters, each power adjuster having a tiltable axis of rotation, and a controller coupled to a memory storing a set of instructions, the method comprising the controller performing the steps of:

receiving, from a user interface, an indication of a desired operating mode selected from a plurality of operating modes, wherein at least one operating mode allows the vehicle to operate in an efficiency mode and at least one operating mode allows the vehicle to operate in a performance mode;

receiving an input associated with a desired vehicle speed;

receiving an input associated with a motor speed;

receiving information associated with the CVT, wherein information information from a speed sensor and information from an actuator position sensor;

determining an input speed to the CVT based at least in part on the motor speed and the information associated with the CVT to achieve the desired vehicle speed; and

adjusting a ratio of the CVT based on one or more predefined parameters.

8. The method of claim 7, wherein adjusting a ratio of the CVT comprises:

monitoring a sensor to determine the current draw of the drive motor when operating the CVT and the drive motor at the desired vehicle speed;

comparing the motor current draw to a desired range of current; and

adjusting a ratio of the CVT based at least in part on the comparison of the motor current draw to a desired motor current draw and the desired vehicle speed.

9. The method of claim 7, wherein receiving an input associated with a motor speed comprises:

receiving an input associated, with a motor current draw; and

determining, from a table stored in the memory, a motor speed associated with the motor current draw.

10. The method of claim 7, wherein determining an input speed to the CVT comprises creating a table indicative of the relationship between motor current draw and vehicle speed.

11. The method of claim 10, wherein creating a table comprises operating the vehicle for a range of vehicle operating speeds and creating a plurality of tables, wherein each table is created for a predetermined operating parameter of the vehicle.

12. The method of claim 11, wherein the plurality of tables includes at least one table comprises a mode table for operating, the vehicle.

13. The method of claim 7, wherein receiving an input associated with a desired vehicle speed comprises reading a throttle position.