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US 9,038,438 B2Granted
Method and device for detecting the independent running of an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsGholamabas Esteghlal, Rolf Stracke
Life of this patent
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Abstract
A method is described for detecting the independent running and/or the start/stop of an internal combustion engine, in which parameters of the internal combustion engine characterizing the combustion process, especially pressure changes or vibrations, are evaluated for this detection.
Claims15
A method for an internal combustion engine in a hybrid electrical vehicle, the method comprising:
- tow-starting the internal combustion engine in the hybrid electrical vehicle from its position of rest with a start-assist apparatus;
- and
- subsequent to the tow-starting:
- obtaining a knock signal component from output of a knock sensor disposed on the internal combustion engine in the hybrid electrical vehicle;
- and
- evaluating, based on the knock signal component, at least one of:
- a change in pressure that characterizes a combustion process in the hybrid electrical vehicle;
- and
- vibrations that characterize the combustion process in the hybrid electrical vehicle;
- wherein the evaluating includes comparing the knock signal component to a respective predefined reference range;
- and
- wherein the method further comprises determining that the internal combustion engine in the hybrid electrical vehicle is independently running responsive to a result of the comparing being that the knock signal component is within the respective predefined reference range.
9 more elements
A method for detecting an independent running of an internal combustion engine, the method comprising:
- tow-starting the internal combustion engine from its position of rest with a start-assist apparatus;
- and
- subsequent to the tow-starting, evaluating parameters derived from a signal of a knock sensor, the parameters including at least one of pressure changes and vibrations, that characterize a combustion process;
- wherein:
- to start the internal combustion engine, an engine management outputs a signal to the start-assist apparatus and calculates at least one controlled variable for the internal combustion engine that is set at the internal combustion engine;
- the at least one controlled variable of the started internal combustion engine is measured;
- and
- the evaluation of the parameters is performed responsive to a determination that the measured controlled variable has a value greater than zero.
5 more elements
A method for detecting an independent running of an internal combustion engine, the method comprising:
- tow-starting the internal combustion engine from its position of rest with a start-assist apparatus;
- and
- subsequent to the tow-starting, evaluating parameters derived from a signal of a knock sensor, the parameters including at least one of pressure changes and vibrations, that characterize a combustion process;
- wherein, if a value of one of two measured controlled variables of the internal combustion engine is not zero and if a value of at least one of the evaluated parameters is outside a reference range, a defect of an actuator that adjusts the controlled variable is inferred.
1 more element
A device for an internal combustion engine in a hybrid electrical vehicle, the device comprising:
- a signal arrangement configured to output a signal to a start-assist apparatus to tow-start the internal combustion engine from its position of rest;
- and
- an evaluating arrangement configured to perform the following subsequent to the tow-starting:
- obtain a knock signal component from output of a knock sensor;
- and
- evaluate, based on the knock signal component, at least one of:
- a change in pressure that characterizes a combustion process in the hybrid electrical vehicle;
- and
- vibrations that characterize a combustion process in the hybrid electrical vehicle;
- wherein the evaluation includes comparing the knock signal component to a respective predefined reference range;
- and
- wherein the evaluating arrangement is further configured to determine that the internal combustion engine in the hybrid electrical vehicle is independently running responsive to a result of the comparison being that the knock signal component is within the respective predefined reference range.
9 more elements
Dependencies are inferred from the claim text.