Method For Increasing The Resolution Of Output Signals From At Least One Measuring Sensor On An Internal Combustion Engine And Corresponding Controller
First Claim
1. A method for increasing the resolution of output signals from at least one measuring sensor for an internal combustion engine, comprising the steps of:
- dividing the working level range of the measuring sensor, within which the level values of its raw sensor signal lie, into at least two measuring range segments,assigning the same predefined output level range of the output signal of the measuring sensor, which is limited compared with the working level range, to each measuring range segment, with the switch from one measuring range segment to the other being carried out independently by the measuring sensor, when a measuring range boundary between two adjacent measuring range segments is reached, exceeded or fallen below,determining the operating point of the internal combustion engine by means of an engine controller based on at least one operating parameter for its combustion process,predicting the temporal profile of the raw sensor signal of the measuring sensor from at least one performance characteristic information item for the currently determined operating point, anddetermining by the engine controller which measuring range segment of the measuring sensor is currently activated based on this predicted temporal raw sensor signal profile.
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Abstract
The resolution of output signals from at least one measuring sensor on an internal combustion engine can be increased by: the working level range of the sensor is divided into at least two range sections, each section is provided with the same given output level range limited with relation to the working level range, for the output signal from the sensor and the switching from one to the other section is carried out independently by the sensor, when a range boundary between two adjacent sections is reached, exceeded or fallen below, the operating point of the internal combustion engine is determined by an engine management based on at least one parameter, the time curve for the raw sensor signal is predicted from at least one set of performance characteristics for the current operating point and the engine management determines which section is current from the predicted raw sensor signal time curve.
8 Citations
16 Claims
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1. A method for increasing the resolution of output signals from at least one measuring sensor for an internal combustion engine, comprising the steps of:
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dividing the working level range of the measuring sensor, within which the level values of its raw sensor signal lie, into at least two measuring range segments, assigning the same predefined output level range of the output signal of the measuring sensor, which is limited compared with the working level range, to each measuring range segment, with the switch from one measuring range segment to the other being carried out independently by the measuring sensor, when a measuring range boundary between two adjacent measuring range segments is reached, exceeded or fallen below, determining the operating point of the internal combustion engine by means of an engine controller based on at least one operating parameter for its combustion process, predicting the temporal profile of the raw sensor signal of the measuring sensor from at least one performance characteristic information item for the currently determined operating point, and determining by the engine controller which measuring range segment of the measuring sensor is currently activated based on this predicted temporal raw sensor signal profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control device with at least one calculation unit, operable to increase the resolution of output signals from at least one measuring sensor for an internal combustion engine, the control device being operable to:
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divide the working level range of the measuring sensor, within which the level values of its raw sensor signal lie, into at least two measuring range segments, assign the same predefined output level range of the output signal of the measuring sensor, which is limited compared with the working level range, to each measuring range segment, with the switch from one measuring range segment to the other being carried out independently by the measuring sensor, when a measuring range boundary between two adjacent measuring range segments is reached, exceeded or fallen below, wherein the operating point of the internal combustion engine is determined by means of an engine controlled based on at least one operating parameter for its combustion process, and to predict the temporal profile of the raw sensor signal of the measuring sensor from at least one performance characteristic information item for the currently determined operation point, wherein the engine controller determines which measuring range segment of the measuring sensor is currently activated based on this predicted temporal raw sensor signal profile. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification