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Method for correcting measurement signals of a rotating camshaft during partial engine operation

A technology for engine operation and signal measurement, applied in engine control, machine/engine, mechanical equipment, etc., can solve problems such as adverse effects of camshaft adjustment, and achieve the effect of improving camshaft adjustment and reducing jumps

Active Publication Date: 2019-06-04
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in varying deviations in the angular deviation, which have a negative effect on the camshaft adjustment

Method used

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  • Method for correcting measurement signals of a rotating camshaft during partial engine operation
  • Method for correcting measurement signals of a rotating camshaft during partial engine operation
  • Method for correcting measurement signals of a rotating camshaft during partial engine operation

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Experimental program
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Effect test

Embodiment Construction

[0029] exist figure 1 A device designed for carrying out a preferred embodiment of the method according to the invention is shown in .

[0030] The sensor wheel 10 is connected to a camshaft 11 of the combustion engine. This camshaft 11 is connected with the crankshaft of the combustion engine, for example by means of a toothed belt (in figure 1 not shown). The periphery or edge of the sensor wheel 10 has here four markings 12 a , 12 b , 12 c and 12 d (for example one marking per cylinder; segment length then: 360° NW / number of cylinders). The area between the front of the marking 12a and the front of the marking 12b is referred to as a section SA. Similarly, the area between the front of the marking 12b and the front of the marking 12c is called section SB, the area between the front of the marking 12c and the front of the marking 12d is called section SC and the front of the marking 12d The area between it and the front part of the marking 12a is called section SD.

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Abstract

The invention relates to a method for determining the actual angular value of the rotational movement of a rotating camshaft in a combustion engine during partial engine operation, having a sensor wheel with a plurality of markings, wherein the sensor wheel is connected to the rotating The camshaft of the camshaft is in a non-rotatable connection, also has a receiver, which detects the marking of the sensing wheel and determines the measurement signal and wherein the lateral position of the marking of the sensing wheel is determined from the measurement signal, wherein at a little Later second time point: determination of a measurement signal from which the lateral edge position at a later second time point is determined and from which the lateral edge position at a later second time point is based on the earlier The relationship between the flank position and the actual angle of the rotational movement of the camshaft of the combustion engine, ascertained at the first point in time during the partial engine operation, determines the actual angular value of the rotational movement of the camshaft.

Description

technical field [0001] The invention relates to a method for determining the actual angular value of the rotational movement of a rotating camshaft in a combustion engine during partial engine operation. Background technique [0002] In a four-stroke combustion engine, the camshaft normally rotates at half the speed of the crankshaft. Thus, one revolution of the camshaft (360° NW) corresponds to two revolutions of the crankshaft with a crankshaft angle of 720° KW and thus corresponds to a complete combustion cycle of the combustion engine. During camshaft adjustment (also referred to as variable camshaft control), relative angular deviations between camshaft position and crankshaft position can occur within a certain range. Here, too, camshaft adjustment is usually carried out in order to adjust the angular misalignment. For this purpose it is necessary to determine the current position of the camshaft (actual angular value of the rotary movement from 0 to 720° KW), for wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00
CPCF02D41/0087F02D41/009F02D41/2432F02D41/2474F02D41/28F02D2041/001F02D2041/286F02D13/02F02D41/04F02D45/00
Inventor O.克兰尼希P.施图克特A.拉斯尔
Owner ROBERT BOSCH GMBH