Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-03-15
2005-03-15
Huynh, Hai (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S337000, C123S399000, C123S635000
Reexamination Certificate
active
06866027
ABSTRACT:
An air throttle body assembly having an integrated electronic control unit, ECU, is part of robust and compact electronic fuel injection system of a combustion engine. The ECU has an internal heat sensitive microprocessor located in an environmentally protected inner compartment of the ECU defined between an external surface of thermally conductive throttle body and a circuit board of the ECU. The throttle body has a through air passage for flowing of combustion air into the piston cylinder. The relatively cool and non-laminar flow of air also serves to cool the inner compartment of the ECU through the throttle body thus protecting the microprocessor from overheating. Moreover, a thermally conductive heat sink member of the ECU is exposed within the inner compartment and directly engages various heat producing transistors for transfer of heat by thermal conduction away from internal circuitry an into the surrounding environment outward from the throttle body assembly.
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Marchesini Stefano
Terilizzi Raffaele
Huynh Hai
Reising Ethington Barnes Kisselle P.C.
Walbro Engine Management , L.L.C.
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