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Ignition coil, in particular for an internal combustion engine of a motor vehicle

A technology for ignition coils and internal combustion engines, applied to parts of transformers/inductors, magnetic cores/yokes, transformers, etc., can solve problems such as expanding installation space, and achieve the effects of simplified installation process, good magnetic performance, and reduced structural space

Inactive Publication Date: 2009-08-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in the known ignition coil, the coil body also requires an enlarged installation space on the side opposite the outer magnetic core due to its design.

Method used

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  • Ignition coil, in particular for an internal combustion engine of a motor vehicle
  • Ignition coil, in particular for an internal combustion engine of a motor vehicle

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Experimental program
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Embodiment Construction

[0014] exist figure 1 and 2 Ignition coil 10 , shown in a very simplified manner and with respect to its components, is intended to directly contact spark plugs (not shown) of an internal combustion engine in a motor vehicle. The ignition coil 10 has a cup-shaped or cup-shaped housing 11 . In its lower region, the plastic housing 11 has a section 12 with a reduced diameter, which has a only schematically indicated high-voltage connection 13 , which can come into contact with the spark plug. The housing 11 has, laterally in its upper region, a plug 15 with a plurality of plug blades 16 integrally formed on the housing 11 .

[0015] A rod-shaped inner magnetic core 18 with a rectangular cross section is arranged in the interior 17 of the housing 11 . In this case, the longer sides 19 of the inner magnetic core 18 run parallel to the longitudinal axis 20 of the ignition coil 10 . The inner magnetic core 18 is surrounded concentrically by a primary coil 23 and a secondary coi...

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PUM

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Abstract

The invention relates to an ignition coil (10; 40), in particular for an internal combustion engine of a motor vehicle, having an internal magnetic core (18; 18a; 43) which is surrounded concentrically by a primary coil (23; 23a) and a secondary coil (24; 24a). The internal magnetic core (18; 18a; 43) interacts with an external, C-shaped magnetic core (25; 44). To minimize the installation size of the ignition coil (10; 40), it is particularly recommended to adjust the height of the external magnetic core (25; 44) to match the height of the secondary coil (24; 24a). It is further recommended to construct the external magnetic core (25; 44) from multiple laminar elements (55, 56) which can be produced by a punching / bending process, thereby allowing particularly cost-effective production tobe achieved.

Description

technical field [0001] The invention relates to an ignition coil, in particular for a motor vehicle internal combustion engine, according to the preamble of claim 1 . Background technique [0002] Such an ignition coil is known from DE 10 2004 038 799 A1. In the known ignition coil, the C-shaped structure of the outer magnetic core of the ignition coil provides an installation space for the switch assembly inside the housing on the side facing away from the outer magnetic core. Furthermore, in the known ignition coil, the coil body also requires an enlarged installation space on the side opposite the outer magnetic core due to its design. The outer magnetic core has a rectangular cross section whose height approximately corresponds to the height of the inner magnetic core with a square cross section. The cross-sectional area of ​​the outer magnetic core is significantly reduced compared to the cross-sectional area of ​​the inner magnetic core, as a result of which the magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F3/10H01F38/12
CPCH01F27/022H01F3/10H01F38/12H01F27/2455H01F2038/127
Inventor A·斯特格梅尔
Owner ROBERT BOSCH GMBH