Method for controlling a hybrid drive

• US 8,529,399 B2
• Filed: 08/24/2007
• Issued: 09/10/2013
• Est. Priority Date: 10/23/2006
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schenk, Rene, Kaefer, Oliver, Juenemann, Thorsten
• Primary Examiner(s): Wright, Dirk
• Application Number:
  US12/308,477
• Publication Number:
  US 20100304923A1
• Time in Patent Office: 2,209 Days
• Field of Search: 477/3
• US Class Current: 477/3
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• 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 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/40 Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers power-up or power-down of the driveline B60W30/192
• CPC Class Codes: B60W 2540/103 Accelerator thresholds, e.g. kickdown
• CPC Class Codes: B60W 2710/025 Clutch slip, i.e. difference between input and output speeds
• 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

Abstract

A method for controlling a hybrid drive of a vehicle, which includes at least one internal combustion engine and at least one electric machine, having a first clutch situated between the electric machine and the drive train of the vehicle and a second clutch situated between the electric machine and the internal combustion engine. Performance parameters of the hybrid drive are controlled as a function of the driver'"'"'s intent.

Claims

1. A method for controlling a hybrid drive of a vehicle, which includes at least one internal combustion engine and at least one electric machine, having a first clutch situated between the electric machine and a drive train of the vehicle, and a second clutch situated between the electric machine and the internal combustion engine, the method comprising:

controlling performance parameters of the hybrid drive as a function of a driver'"'"'s intent,

wherein the driver'"'"'s intent is divided into classes, the classes differing from one another by a torque request associated with the driver'"'"'s intent,

wherein the driver'"'"'s intent is derived from a position of an accelerator pedal,

wherein a position of the accelerator pedal of up to 30% of a maximum position corresponds to class 1, a position of the accelerator pedal between 30% and 60% corresponds to class 2, and a position of the accelerator pedal of more than 60% of the maximum position corresponds to class 3,

wherein the second clutch is a proportional clutch, and for class 1, when the internal combustion engine is started, a slip torque is set as low as necessary, and for class 3, the slip torque is set substantially higher for achieving a shortest possible start time, such that the slip torque is set as a function of the selected class.

2. The method as recited in claim 1, wherein the hybrid drive has a torque converter and a converter bypass clutch, the converter bypass clutch being disengaged at a low disengagement rate for class 1, and at a maximum rate for class 3.

3. The method as recited in claim 1, wherein the electric machine is a speed-regulated electric machine, a relatively long time is provided for speed regulation after the start of the electric machine for class 1, and a relatively short time is provided for class 3.

4. The method as recited in claim 1, wherein a throttle valve of the vehicle is pre-controlled as a function of the class.

5. The method as recited in claim 4, wherein the throttle valve of the vehicle is pre-controlled at the starting of the internal combustion engine as a function of the selected class.