Title:
HOT WIRE TYPE AIR FLOW METER
Document Type and Number:
WIPO Patent Application WO/1988/010411
Kind Code:
A1
Abstract:
The present invention, the object of which is to provide a hot wire type air flow meter capable of accurately detecting an air suction rate of an internal combustion engine and stabilizing the flow distribution, relates to a hot wire type air flow meter having a main flow passage constituting a suction air flow passage in an internal combustion engine, a hot wire element for measuring the suction air, and an auxiliary flow passage provided therein with the hot wire element and installed in the main flow passage, wherein the auxiliary flow passage has a flow passage member extending in the axial direction of the main flow passage and a flow passage member extending in the radial direction of the main flow passage, a constriction being provided between the auxiliary flow passage and a throttle valve disposed on the downstream side the reof.
Inventors:
SEKINE YOSHITO (JP)
ARAI NOBUKATSU (JP)
OHSAWA TADAO (JP)
TOKUDA HIROATSU (JP)
USUI TOSHIFUMI (JP)
TSUTSUI MITSUKUNI (JP)
ARAI NOBUKATSU (JP)
OHSAWA TADAO (JP)
TOKUDA HIROATSU (JP)
USUI TOSHIFUMI (JP)
TSUTSUI MITSUKUNI (JP)
Application Number:
PCT/JP1988/000577
Publication Date:
December 29, 1988
Filing Date:
June 15, 1988
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01P5/12; F02D35/00; F02D41/18; G01F1/68; G01F1/684; G01F5/00; (IPC1-7): G01F1/68
Foreign References:
| JPS58120121A | 1983-07-16 | |||
| JPS61122523U | 1986-08-01 | |||
| JPS58135916A | 1983-08-12 | |||
| JPS58137716A | 1983-08-16 |
Other References:
See also references of EP 0322459A4
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