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Electronic control unit

A technology for electronic control units and electronic components, applied in electrical components, circuits, printed circuits, etc., to solve problems such as high production costs and heavy weights

Active Publication Date: 2016-10-26
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the electronic control unit described in JP2010-245174A uses a metal cover, thus causing problems of large weight and high production cost

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0019] refer to Figures 1 to 6 The first embodiment is described. In the first embodiment, the electronic control unit 10 used in the electric power steering system 1 of a vehicle is described. The configuration of the electric power steering system 1 is now described. Such as figure 1 As shown in , an electric power steering system 1 includes an electronic control unit 10 connected to a motor 2 through a wire harness 3 and to a battery 4 through a wire harness 5 . The electronic control unit 10 controls the operation of the motor 2 in accordance with a steering torque signal, a vehicle speed signal, and the like transmitted from a controller area network (CAN) of the vehicle, or the like. Thus, the electric motor 2 generates assist torque for assisting the driver's steering. Motor 2 is a DC brush motor.

[0020] The circuit configuration of the electronic control unit 10 is now described. Such as figure 2 As shown in , the circuit of the electronic control unit 10 is...

no. 2 example

[0035] Figure 7 A second embodiment is shown in . In the second embodiment, a cylindrical metal piece 65 is fixed to the inside of the cylindrical portion 52 of the cover 50 . The metal sheet 65 serves as a heat accumulator with a predetermined heat capacity. In other words, the metal piece 65 in the second embodiment also corresponds to an example of a "heat accumulator". The metal piece 65 includes a press-fit portion 61 to be thermocompression-fitted inside the cylindrical portion 52 , and a contact portion 62 exposed from the cylindrical portion 52 at the side of the press-fit portion 61 close to the substrate 40 . Metal sheet 65 further includes holes 66 into which screws 70 are inserted.

[0036] The screw 70 is inserted from the cover 50 side, passes through the hole 55 provided in the cover 50 , the hole 66 of the metal sheet 65 , and the hole 43 of the base plate 40 , and is screw-fitted in the screw hole 34 provided in the heat sink 30 . Accordingly, the heat si...

no. 3 example

[0038] Figures 8 to 10 A third embodiment is shown in . In the third embodiment, the interconnection exposed parts 421 and 422 are provided around the corresponding holes 43 in the four corners of the substrate 40, and the interconnection exposed parts 421 and 422 are provided on the four switches mounted on the substrate 40. At the center of the elements 11 to 14 or at positions adjacent to the switching elements 11 to 14 . In the third embodiment, the interconnect exposures provided around the corresponding holes 43 in the four corners of the substrate 40 are referred to as first interconnect exposures 421 and 422 , and in the power region P of the substrate 40 Interconnect exposed portions disposed adjacent to the four switching elements 11 to 14 within limits are referred to as second interconnect exposed portions 441 and 442 . Each of the second interconnect exposure parts 441 and 442 has no hole for inserting the screw 70 .

[0039] In the third embodiment, the nut 6...

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Abstract

An electronic control unit (10) includes a substrate (40), an electronic component (11-21), a heat sink (30), a cover (50), a heat accumulator (60, 65, 67), and a screw (70). A wiring pattern is formed on the substrate (40). The electronic component (11-21) is mounted on the substrate (40) and generates heat upon energization thereof. The heat sink (30) is provided on one side (Alpha) of the substrate (40) in its thickness direction. The cover (50) is made of resin and is provided on the other side (Beta) of the substrate (40) in its thickness direction. The heat accumulator (60, 65, 67) is fixed to a part of the cover (50) on the substrate (40)-side and is in contact with a surface (Beta) of the substrate (40) on the cover (50)-side. One end of the screw (70) is connected to the heat sink (30). A central portion of the screw (70) is inserted through a hole (43) passing through the substrate (40) in its thickness direction. The other end of the screw (70) is connected to the heat accumulator (60, 65, 67).

Description

technical field [0001] The present disclosure relates to an electronic control unit. Background technique [0002] There is known an electronic control unit in which electronic components including MOSFETs that receive power and thus generate heat are mounted on a substrate having an interconnection pattern. The electronic control unit of JP2010-245174A includes a heat sink on one side in the thickness direction of the substrate and a metal cover on the other side. Heat generated by the electronic components is dissipated to the heat sink and cover. [0003] However, the electronic control unit described in JP2010-245174A employs a metal cover, thus causing problems of large weight and high production cost. Contents of the invention [0004] The present disclosure addresses at least one of the above problems. Accordingly, an object of the present disclosure is to provide an electronic control unit capable of reducing the weight of a cover while increasing dissipation of...

Claims

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Application Information

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IPC IPC(8): H05K7/20H05K1/02H01L25/16H01L23/40H01L23/367B62D5/04
CPCB62D5/0406H01L23/367H01L23/4006H01L25/16H05K1/0209H05K7/20854H05K2201/10166H05K2201/10545H05K2201/10409H05K2201/10053H05K2201/10022H05K2201/1003H05K2201/10015H05K2201/1056H05K2201/066H05K7/209H05K7/14322
Inventor 田岛刚
Owner DENSO CORP
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