METHOD AND TEST BENCH FOR TESTING A STARTER MOTOR

• US 20140366616A1
• Filed: 10/02/2012
• Published: 12/18/2014
• Est. Priority Date: 12/15/2011
• Status: Active Grant

• Current Assignee: AVL List GmbH (List Privatstiftung)
• Original Assignee: AVL List GmbH (List Privatstiftung)
• Inventors: Kokal, Helmut, Dank, Matthias, Holzhammer, Peter, Prettenthaler, Ronald, Stockreiter, Martin
• Granted Patent: US 9,453,781 B2
• Time in Patent Office: Days
• US Class Current: 73/116.05
• CPC Class Codes: G01M 15/02 Details or accessories of testing apparatus
• CPC Class Codes: G01M 15/044 by monitoring power, e.g. by operating the engine with one of the ignitions interrupted; by using acceleration tests

Abstract

To enable testing of a starter motor on a test beach with an electrical dynamometer as a replacement for the real combustion engine, a simulation unit (20) is provided in which a mathematical model of the combustion engine is implemented, and the simulation unit (20) determines a new load setpoint (n_s, T_s) using the mathematical model from measured actual values (φ_i, n_i, T_i) of the operation of the electrical dynamometer (3) at every scanning time point of the regulation, which new load setpoint (n_s, T_s) is fed to the regulator (21).

Claims

1. Test bench for testing a starter motor (2), with an electrical dynamometer (3) that is connected to the starter motor (2) and simulates a combustion engine, and a regulator (21) for regulating the electrical dynamometer (3), characterized in that a simulation unit (20) is provided in which a mathematic model of the combustion engine is implemented, and the simulation unit (20) determines a new load setpoint (n_s, T_s) using the mathematical model from measured actual values (φ

_i, n_i, T_i) of the operation of the electrical dynamometer (3) at every scanning time point of the regulation, which new load setpoint (n_s, T_s) is fed to the regulator (21).

2. Test bench as set forth in claim 1, characterized in that the moment of inertia of the electrical dynamometer (3) corresponds substantially to that of the real combustion engine.

3. Method for testing a starter motor (2) on a test bench (1), with an electrical dynamometer (3) that is connected to the starter motor (2), with which a combustion engine is simulated, and a regulator (21) with which the electrical dynamometer (3) is regulated, characterized in that a new load setpoint (n_s, T_s) is calculated from a mathematical model of the combustion engine from measured actual values (φ

_i, n_i, T_i) of the operation of the electrical dynamometer (3) at every scanning time point of the regulation, which new load setpoint (n_s, T_s) is fed to the regulator (21) to regulate the electrical dynamometer (3).