Method for setting a desired operating condition of a hybrid drive for a vehicle

• US 7,134,516 B2
• Filed: 09/07/2002
• Issued: 11/14/2006
• Est. Priority Date: 01/25/2002
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hoetzer, Dieter, Tumback, Stefan, Eisenhardt, Martin
• Primary Examiner(s): Shriver, J. Allen
• Assistant Examiner(s): Collado, Cynthia F.
• Application Number:
  US10/502,199
• Publication Number:
  US 20050072609A1
• Time in Patent Office: 1,529 Days
• Field of Search: 180/65.2, 180/65.3, 180/65.4, 903/942, 903/943
• US Class Current: 180/65.235
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• 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 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2710/081 Speed
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: F16H 3/0915 with coaxial input and output shafts
• CPC Class Codes: F16H 3/728 with means to change ratio in the mechanical gearing
• CPC Class Codes: F16H 37/0813 with only one input shaft differentials for four wheel drive vehicles B60K17/346
• 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

A method is described for adjusting a setpoint operating state of a hybrid drive in a motor vehicle, the hybrid drive including an internal combustion engine and at least two electric motors as the drive motors, and the output shafts of the drive motor being capable of being operatively connected to a drive train of the vehicle, a setpoint operating point of the hybrid drive being adjusted as a function of an instantaneous power demand (output torque) on the hybrid drive and an instantaneous electrical power demand of an electrical system of the vehicle, by determining the speeds and the torques of the drive motors.

At least one of the electric motors (16) is controlled by voltage regulation and the other electric motor(s) (14) is/are controlled by speed regulation.

Claims

1. A method for adjusting a setpoint operating state of a hybrid drive in a vehicle, the hybrid drive having an internal combustion engine and at least two electric motors as drive motors, and the output shafts of the drive motor being operatively connectible to a drive train of the vehicle, a setpoint operating point of the hybrid drive being adjusted as a function of an instantaneous power demand (output torque) on the hybrid drive and an instantaneous electrical power demand of an electrical system of the vehicle, by determining the speeds and the torques of the drive motors,

wherein at least one of the electric motors (16) is controlled by voltage regulation and the other electric motor(s) (14) is/are controlled by speed regulation.

2. The method as recited in claim 1,

wherein the charging and/or discharging capacity of a battery of the vehicle is adjusted by regulating the vehicle system voltage.

3. The method as recited in one of the preceding claims, wherein the vehicle electrical system capacity is determined directly by measuring the vehicle system voltage and a current flow in the intermediate voltage circuit between vehicle electrical system (48) and electric motor (16).