Signal detection for balancing cylinders in a motor vehicle
First Claim
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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Abstract
The present disclosure teaches method for balancing cylinders in a motor vehicle including an engine which has at least two cylinders. The method may include: 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 indicative of acceleration of a crankshaft of the engine caused by the corresponding cylinder, carrying out a signal analysis for each cylinder value function, detecting an amplitude for each signal, forming an amplitude mean value for each cylinder, detecting irregular running of the engine on the basis of the amplitude mean values, and compensating for the detected irregular running of the engine.
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Citations
18 Claims
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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:
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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, and identifying 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An internal combustion engine, comprising:
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at least two cylinders driving a crankshaft, one rotation of the crankshaft defining a cycle of the engine; a controller programmed to; determine a cycle period of the cycle of the engine and a number of cycles of the engine, determine 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 the crankshaft caused by the corresponding cylinder, carry out a signal analysis for each determined cylinder value function, detect an amplitude for each signal analysis, form an amplitude mean value for each cylinder on the basis of the detected amplitudes of the respective cylinder, detect an interference with regular running of the engine, on the basis of the amplitude mean values which are formed, and identify 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, compensate for the detected irregular running of the engine by adjusting the injection amount. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification