发明名称 |
INTAKE AIR FLOW RATE MEASURING APPARATUS FOR INTERNAL COMBUSTION ENGINE |
摘要 |
<p>PURPOSE:To achieve a higher measuring accuracy of a flow rate of an intake air, by providing a circular throttle section having an inner surface comprising a cylinder surface and a tapered surface on a surrounding wall of a suction path on the upstream of a heating resistor. CONSTITUTION:An intake flow rate measuring apparatus 10 has a ring member 11 which composes a circular throttle section in proximity to a hollow member 2 in such a manner as to be inserted into a surrounding wall of an air suction path 3 on the upstream of the hollow member 2 provided with a heating resistor Rh and a temperature compensation resistance Rk facing each other. The ring member 11 has a cylinder surface 11a with a fixed opening area having a reduced path area and a tapered surface 11c with a path area expanding gradually toward the downstream being smoothly linked to a downstream end thereof. This can reduce a difference between an average flow velocity of an air intake flowing through an intake manifold due to a pressure loss at the throttle section and an intake flow velocity at a part provided with the heating resistor Rh thereby achieving a higher measuring accuracy of an intake flow rate.</p> |
申请公布号 |
JPH01110220(A) |
申请公布日期 |
1989.04.26 |
申请号 |
JP19870266450 |
申请日期 |
1987.10.23 |
申请人 |
JAPAN ELECTRON CONTROL SYST CO LTD |
发明人 |
FURUYA JUNICHI;TANAKA YOSHIKAZU;OTANI SEIICHI;KUBO YASUKUNI;HARA HIROYUKI;SHO KAZUHIKO;FUJIWARA KOICHI;SATO HIROYUKI |
分类号 |
F02D35/00;G01F1/68;G01F1/684;G01M15/00;G01M15/04 |
主分类号 |
F02D35/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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