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US 6,782,744 B1Granted
Gas flow rate measuring apparatus
AssigneesHitachi, Ltd., Hitachi Car Engineering Co., Ltd.
InventorsShinobu Tashiro, Shinya Igarashi, Hitoshi Ishikawa
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AssigneesHitachi, Ltd., Hitachi Car Engineering Co., Ltd.
InventorsShinobu Tashiro, Shinya Igarashi, Hitoshi Ishikawa
Estimating the term…
A power transistor 1 is mounted on a metallic power supply terminal 40 within an intake pipe 20, individually and separately from an electronic circuit board 7 on which other electronic circuit element are mounted. This power supply terminal 40 acts as a terminal for electric power input and its one portion is exposed within the gas path of the intake pipe 20. The heat-generation of the power transistor 1 is effectively heat-generated by the metallic terminal 40 without giving a remarkable effect to the other circuit elements. With this, it is possible to reduce any heat effect to the other electronic circuit components due to the self heat-generation of the power transistor 1 without the additional number of parts and to effectuate the gas flow rate measuring apparatus of which measuring accuracy and reliability are high.
A gas flow rate measuring apparatus having a flow rate detecting element for measuring gas flow rate, an electronic circuit electrically connected to said flow rate detecting element for controlling said flow rate detecting element and outputting a signal corresponding to gas flow rate, a housing for protecting said electronic circuit housed within said housing, and a terminal arranged to communicate between said electronic circuit and external equipment located outside said housing,
A gas flow rate measuring apparatus having a flow rate detecting element for measuring gas flow rate, an electronic circuit electrically connected to said flow rate detecting element for controlling said flow rate detecting element and outputting a signal corresponding to gas flow rate, a housing for protecting said electronic circuit therein and a terminal for communicating between said electronic circuit and an external equipment of the outside of said housing,
Dependencies are inferred from the claim text.