ANGULAR VELOCITY CONTROL FOR HYBRID VEHICLE PRIME MOVERS

• US 20120323428A1
• Filed: 03/03/2010
• Published: 12/20/2012
• Est. Priority Date: 03/03/2010
• Status: Active Grant

• Current Assignee: International Truck Intellectual Property Co. LLC (Volkswagen AG)
• Original Assignee: International Truck Intellectual Property Co. LLC (Volkswagen AG)
• Inventors: Bissontz, Jay E
• Granted Patent: US 8,935,028 B2
• Time in Patent Office: Days
• US Class Current: 701/22
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/443 Torque
• 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 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• 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 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 2510/0638 Engine speed
• CPC Class Codes: B60W 2510/0661 Torque change rate
• CPC Class Codes: B60W 2510/0695 Inertia
• CPC Class Codes: B60W 2510/081 Speed
• CPC Class Codes: B60W 2710/0672 Torque change rate
• CPC Class Codes: B60W 2710/085 Torque change rate
• CPC Class Codes: B60W 30/188 Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: B60W 30/1886 Controlling power supply to auxiliary devices
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y10S 903/93 Conjoint control of different elements

Abstract

An hybrid vehicle control system controls the output from one of two prime movers installed on the vehicle by reference to available angular acceleration rates for the first and second prime movers. When angular acceleration is called for and the prime mover having greater capacity for angular acceleration is active, acceleration is limited to that which would have been available from the lower capacity prime mover. One application of the system is to provide consistent throttle responsiveness, particularly for a power take-off operation vocation installed on the vehicle.

Claims

1. A vehicle, comprising:

a first prime mover;

a second prime mover;

a transmission coupled to absorb power from the first prime mover or the second prime mover;

a power take-off operation selectively operable from the transmission;

means for selecting an operating speed for the power take-off operation;

means for providing first and second available angular acceleration rates for the first and second prime movers for increases in operating speed of the power take-off operation; and

control means responsive to selection of increased operating speed for the power take-off operation for directing angular acceleration of an operable one of the first and second prime movers at no more than the lesser of the first and second available angular acceleration rates.

2. A vehicle as set forth in claim 1, further comprising:

means for providing first and second available angular deceleration rates for the power take-off operation; and

the control means being further responsive to selection of a reduced operating speed for directing the operable one of the first and second prime movers to decelerate as a selected on the available angular deceleration rates.

3. A vehicle as set forth in claim 1, further comprising:

the control means including a finite impulse response filter for operating on periodically generated data relating to selected operating speed to generate a conditioned selected operating speed.

4. A vehicle as set forth in claim 3, further comprising:

the control means providing for setting a sample window duration and sample time increment for the finite impulse response filter.

5. A vehicle as set forth in claim 4, further comprising:

the control means providing for adjusting weights applied to data points in the finite impulse response filter.

6. A vehicle as set forth in claim 3, further comprising:

the first prime mover being an internal combustion engine; and

the second prime mover being a electric traction motor.

7. A system for controlling output from at least one of first and second prime movers installed on a motor vehicle, the system comprising:

means for providing first and second available angular acceleration rates for the first and second prime movers;

means for selecting a target output from whichever prime mover is active;

means responsive to selection of an increased target output for setting angular acceleration of the active of the first or second prime movers to the lesser available angular acceleration for the first and second prime movers until the increased target output is met.

8. A system as set forth in claim 7, further comprising:

the first and second prime movers being an internal combustion engine and a electric traction motor, respectively; and

the means for setting angular acceleration including an electrical system controller, a hybrid controller and an engine control module, the electrical system controller, hybrid controller and engine control module being coupled for communication of data.

9. A system as set forth in claim 8, further comprising:

a transmission operable from either the internal combustion engine or the electric traction motor;

a power take-off operation coupled to the transmission; and

the means for setting angular acceleration being active responsive to activation of the power take-off operation.

10. A system as set forth in claim 9, further comprising:

the means for selecting including an operator throttle.

11. A system as set forth in claim 10, further comprising:

the electrical system controller being programmed to implement a finite impulse response filter on data generated from position of the operator throttle.

12. A system as set forth in claim 11, further comprising:

the finite impulse response filter having selectable weights, duration and granularity.

13. A system as set forth in claim 9, further comprising:

means responsive to selection of a decreased target output for setting angular deceleration of the active of the first or second prime movers to the match the available angular acceleration for the first or second prime movers until the decreased target output is met.