Angular acceleration transducer

• US 6,324,483 B1
• Filed: 06/16/1999
• Issued: 11/27/2001
• Est. Priority Date: 08/07/1997
• Status: Expired due to Fees

• Current Assignee: Asea Brown Boveri AG (ABB Limited)
• Original Assignee: Asea Brown Boveri AB (ABB Limited)
• Inventors: Sobel, Jarl
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): PRETLOW, DEMETRIUS R
• Application Number:
  US09/320,000
• Time in Patent Office: 895 Days
• Field of Search: 702/104, 731/16, 731/173, 701/110, 701/111
• US Class Current: 702/104
• CPC Class Codes: F02D 2200/1002 Output torque
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 41/28 Interface circuits
• CPC Class Codes: G01P 15/034 for indicating angular accelerations G01P15/036 takes precedence

Abstract

An angular acceleration transducer measures angular acceleration of a torque-transmitting shaft of a drive device, and includes a measuring shaft having a torque transducer and a transducer flywheel, and which is connected to the torque-transmitting shaft in such a way that it follows rotational movement of the torque-transmitting shaft with a known ratio.

Claims

1. An angular acceleration transducer for measuring the angular acceleration of a torque-transmitting shaft (2) of a drive device (1), characterized in that the angular acceleration transducer comprises a measuring shaft (6) continuously connected to the torque-transmitting shaft in such a way that it follows the rotational movement of the torque-transmitting shaft with a known ratio “

n”

between the rotational speed of the measuring shaft and the torque-transmitting shaft and that the measuring shaft is provided with a torque transducer (7) and a transducer flywheel (9), whereby the angular acceleration of the torque-transmitting shaft will be

2. An angular acceleration transducer according to claim 1 for detecting misfiring of drive devices, the torque-transmitting shaft (2) of which is provided with a vibration-damping flywheel (3) with a gear ring with N_s teeth, characterized in that the measuring shaft (6) of the angular acceleration transducer is provided with a gear wheel with a gear ring with N_gteeth in engagement with the teeth of the vibration-damping flywheel, and that the angular acceleration of the torque-transmitting shaft of the drive device will be dω

_s/dt=(N_g/N_s)×

M_g/T_g.

3. An angular acceleration transducer according to claim 1, wherein the drive device (1) is provided with an output shaft (10) for connection of a vibration damper (11) or other auxiliary systems, characterized in that the angular acceleration transducer is connected to the second output shaft.

4. An angular acceleration transducer according to claim 1, characterized in that for continuous measurement and for compensation for the load of the drive device, the angular acceleration transducer is supplemented with a torque transducer (5) mounted around the output shaft (4) of the drive device after the vibration-damping flywheel.

5. Use of an angular acceleration transducer according to claim 1, characterized in that it is used for detecting misfiring of drive devices.