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Signal detection for balancing cylinders in a motor vehicle

  • US 10,047,690 B2
  • Filed: 07/02/2014
  • Issued: 08/14/2018
  • Est. Priority Date: 09/05/2013
  • Status: Active Grant
First Claim
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1. A method for balancing cylinders in a motor vehicle including an engine which has at least two cylinders, the method comprising:

  • determining a cycle period of a cycle of the engine and a number of cycles of the engine,determining a cylinder value function for each cylinder of the engine for each cycle over the number of cycles, wherein the cylinder value function represents acceleration of a crankshaft of the engine caused by the corresponding cylinder,carrying out a signal analysis for each determined cylinder value function,detecting an amplitude for each signal analysis,forming an amplitude mean value for each cylinder on the basis of the detected amplitudes of the respective cylinder,detecting an interference with regular running of the engine, on the basis of the amplitude mean values which are formed, andidentifying a synchronous component of the interference as irregular running caused by an injection amount and an asynchronous component of the interference as a secondary assembly interference,compensating for the detected irregular running of the engine by adjusting the injection amount.

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