Engine control circuit device

• US 20060012034A1
• Filed: 07/12/2005
• Published: 01/19/2006
• Est. Priority Date: 07/13/2004
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Sasaki, Masahiro, Mayuzumi, Takuya, Kadoya, Kiyoomi, Eguchi, Shuuji
• Application Number:
  US11/178,407
• Publication Number:
  US 20060012034A1
• Time in Patent Office: Days
• US Class Current: 257/712
• CPC Class Codes: H05K 1/0203 Cooling of mounted components H05K1/0272 takes precedence
• CPC Class Codes: H05K 1/0272 Adaptations for fluid transport, e.g. channels, holes
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 2201/064 Fluid cooling, e.g. by integral pipes
• CPC Class Codes: H05K 2201/066 Heatsink mounted on the surface of the printed circuit board [PCB]
• CPC Class Codes: H05K 2203/1316 Moulded encapsulation of mounted components
• CPC Class Codes: H05K 3/284 for encapsulating mounted components H05K1/185 takes precedence
• CPC Class Codes: H05K 5/0034 having an overmolded housing covering the PCB
• CPC Class Codes: H05K 7/20872 Liquid coolant without phase change

Abstract

An engine control circuit device which has higher heat resistance and can be installed in a place exposed to severe thermal environments. In an engine control circuit device comprising a circuit board on which a plurality of packaged electronic parts are mounted, and a connector mounted on the circuit board for connection to an external circuit, the device further comprises a resin portion formed of a thermo-setting resin and covering the connector except for a connecting portion thereof and the circuit board, and a cooling pipe integrally molded in the resin portion and allowing a coolant to flow through it, thereby cooling the resin portion.

Claims

1. An engine control circuit device comprising a circuit board on which a plurality of packaged electronic parts are mounted, and a connector mounted on said circuit board for connection to an external circuit,

wherein said engine control circuit device further comprises a resin portion formed of a thermo-setting resin and covering said connector except for a connecting portion thereof and said circuit board;

and

cooling means integrally molded in said resin portion and cooling said resin portion.

2. The engine control circuit device according to claim 1, wherein said cooling means is a cooling pipe through which a coolant flows.

3. The engine control circuit device according to claim 2, wherein said cooling pipe is bonded to said circuit board using an adhesive and is integrally molded in said resin portion.

4. The engine control circuit device according to claim 2, wherein said cooling pipe is arranged such that engine cooling water flows as said coolant through said cooling pipe.

9. The engine control circuit device according to claim 1, wherein said circuit board has one or more thermal vias formed therein for radiating heat from one to the other side of said circuit board.

10. The engine control circuit device according to claim 1, wherein said circuit board is formed of a flexible substrate.

11. The engine control circuit device according to claim 1, wherein said resin portion is molded such that an illuminating electronic part is surrounded by a transparent thermo-setting resin.

5. An engine control circuit device comprising a circuit board on which a plurality of packaged electronic parts are mounted, and a connector mounted on said circuit board for connection to an external circuit,

wherein said engine control circuit device further comprises a resin portion formed of a thermo-setting resin and covering said connector except for a connecting portion thereof and said circuit board;

and

a cooling passage formed in said resin portion and allowing a coolant to flow through said cooling passage, thereby cooling said resin portion.

6. An engine control circuit device comprising a circuit board on which a plurality of packaged electronic parts are mounted, and a connector mounted on said circuit board for connection to an external circuit,

wherein said engine control circuit device further comprises a resin portion formed of a thermo-setting resin and covering said connector except for a connecting portion thereof and said circuit board;

and

a metal-made heat sink integrally molded in said resin portion.

7. The engine control circuit device according to claim 6, wherein said heat sink is bonded to said circuit board using an adhesive and is integrally molded in said resin portion.

8. The engine control circuit device according to claim 6, wherein said heat sink has mount holes formed therein for fixing in place.