Pressure detecting apparatus and installation structure of same
AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsYasuyuki Kawabe, Tokio Kohama, Kiyohiko Watanabe, Yukihiro Kato, Yoshifumi Watanabe
Life of this patent
Estimating the term…
Abstract
A pressure detecting apparatus having a pressure introducing pipe is installed on an intake surge tank for detecting inner pressure in the intake surge tank. The intake surge tank is provided with a throttle passage having a throttle is disposed in the intake surge tank along a flow direction of the gas for increasing a flow speed of the gas. A pressure inlet at a leading end of the pressure introducing pipe is positioned in a vicinity of the throttle.
Claims25
An installation structure of a pressure detecting apparatus installed on a pipe member for an intake and exhaust system of an internal combustion engine, comprising:
- a throttle valve for introducing gas into the pipe member, an amount of the introduced gas being variable according to an operation of the internal combustion engine;
- a pressure introducing pipe having a pressure inlet and a pressure outlet, the pressure introducing pipe being connected on a side of the pressure inlet to the pipe member and on a side of the pressure outlet to the pressure detecting apparatus so that inner pressure in the pipe member may be introduced to and detected by the pressure detecting apparatus;
- and
- a throttle passage disposed in the pipe member downstream of the throttle valve for permitting a part of the introduced gas to bypass, the throttle passage being provided with an inner wall extending along a flow direction of the gas to constitute a throttle portion for increasing a flow speed of the bypassing gas,
- wherein the pressure inlet is positioned in a vicinity of the throttle portion.
An installation structure of a pressure detecting apparatus installed on a pipe member for an intake and exhaust system of an internal combustion engine, comprising:
- a throttle valve for introducing gas into the pipe member, an amount of the introduced gas being variable according to an operation of the internal combustion engine;
- and
- a pressure introducing pipe having a pressure inlet and a pressure outlet, which is connected on a side of the pressure inlet to the pipe member downstream of the throttle valve and on a side of the pressure outlet to the pressure detecting apparatus so that inner pressure in the pipe member may be introduced to and detected by the pressure detecting apparatus,
- wherein the pressure introducing pipe has a projecting portion partly protruding into an inside of the pipe member to open the pressure inlet toward a downstream of the gas flow, the projecting portion on an upstream side of the gas flow being provided with a tapered portion inclined by a predetermined angle with respect to an protruding direction of the pressure introducing pipe into the pipe member.
An installation structure of a pressure detecting apparatus installed on a pipe member for an intake and exhaust system of an internal combustion engine, comprising:
- a throttle valve for introducing gas into the pipe member, an amount of the introduced gas being variable according to an operation of the internal combustion engine;
- and
- a pressure introducing pipe having a pressure inlet and a pressure outlet, which is connected on a side of the pressure inlet to the pipe member downstream of the throttle valve and on a side of the pressure outlet to the pressure detecting apparatus so that inner pressure in the pipe member may be introduced to and detected by the pressure detecting apparatus,
- wherein the pressure introducing pipe has a projecting portion partly protruding inside the pipe member to open the pressure inlet toward a downstream of the gas flow, the pressure inlet being formed in a slit shape long narrow along a protruding direction of the projecting portion into the pipe member.
A pressure detecting apparatus to be installed on a pipe member for an intake and exhaust system of an internal combustion engine, comprising:
- a throttle valve for introducing gas into the pipe member, an amount of the introduced gas being variable according to an operation of the internal combustion engine;
- and
- first and second pressure introducing passages, the first passage having a gas entrance and a gas exit on opposite ends thereof, which are opened to an inside of the pipe member downstream of the throttle valve, and the second passage being connected at one end thereof to the first passage between the gas entrance and the gas exit and at another end to the pressure detecting apparatus so that a part of the gas flowing in the pipe member bypasses the first passage and flows from the gas entrance to the gas exit due to a pressure difference between the gas entrance and the gas exit, while inner pressure in the pipe member may be introduced to and detected by the pressure detecting apparatus.
Dependencies are inferred from the claim text.