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Arrangement for detecting the cylinder assignment of an internal combustion engine

A technology of internal combustion engines and cylinders, applied in the direction of electrical control, mechanical equipment, engine components, etc., can solve problems such as influence and difficulty

Inactive Publication Date: 2014-02-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, it is difficult and partly impossible to implement the cylinder assignment by means of the derived signal with the known method, such as that described in DE 40 28 545 A1, since the decoupled secondary signal is also affected by the ignition coil The effect of the primary circuit

Method used

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  • Arrangement for detecting the cylinder assignment of an internal combustion engine
  • Arrangement for detecting the cylinder assignment of an internal combustion engine
  • Arrangement for detecting the cylinder assignment of an internal combustion engine

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Embodiment Construction

[0026] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0027] exist figure 1 The left side shows the secondary voltage distribution of the two spark plugs 16 and 17, wherein the first spark plug 16 is arranged in the uncompressed cylinder and the second spark plug 17 is arranged in the compressed cylinder. The upper curve A corresponds to the secondary voltage on the first spark plug 16 and the lower curve B corresponds to the secondary voltage on the second spark plug 17 . It can be seen that when the two spark plugs develop the ignition voltage, the two voltages (in the ideal case) rise symmetrically with respect to the zero line until on one of the two spark plugs, here the first on the uncompressed cylinder. The spark plug 16 breaks down and the voltage there has a constant level of about 1 kV, ie the separation voltage.

[0028]As a result, a sudden change in the potential of the seco...

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Abstract

The invention relates to an arrangement for detecting the cylinder assignment of an internal combustion engine, having a tapping plate (2) which detects an electric field of a secondary winding of a double spark coil, and a divider capacitor (4) which distributes a charge influenced on the tapping plate (2) to a mass in such a manner that a lower capacitor voltage, which is tapped off for cylinder assignment, is produced across the divider capacitor (4), wherein the mass is connected to an engine earth (5).

Description

technical field [0001] The invention relates to a device according to the preamble of claim 1 for detecting the cylinder assignment of an internal combustion engine. Background technique [0002] The prior art for signal analysis of ignition coils, in particular 2×2 ignition coils, is the wide variety of capacitive interception concepts implemented on such double-spark coils. For double spark coils, both ends of the secondary winding are connected to one spark plug each. After switching off the charging current on the primary side, the voltages on the two spark plugs rise almost symmetrically with respect to the neutral line, with one voltage rising towards the positive voltage and the other towards the negative voltage. A spark plug in a cylinder in the exhaust stroke has a lower breakdown voltage than another spark plug in the compression stroke due to the lower combustion chamber pressure. If only the first spark plug breaks down, the voltage on that spark plug drops fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P15/08
CPCF02P2017/006F02P17/00F02D2041/0092F02D2250/14F02D41/009F02P15/08
Inventor G·马莱布赖因L·普特曼J·赖特H·科利
Owner ROBERT BOSCH GMBH