Pressure sensor and attaching mechanism thereof
AssigneeDenso Corporation
InventorsHisayuki Takeuchi, Inao Toyoda, Hiroshige Matsui
Life of this patent
Estimating the term…
Abstract
A pressure sensor is attached to an engine by inserting a cylindrical metal case having a hollow part into an attaching hole formed in the engine in which engine oil flows. An oil passage is formed in the cylindrical metal case, and oil passages are formed in the housing. The pressure sensor is connected to the engine through an oil transmitting pipe and an oil returning pipe in order to radiate thermal energy of a pressure sensing diaphragm and a pressure sensing chip by flowing the engine oil from the engine to the hollow part of the metal case and by returning the engine oil from the hollow part to the engine.
Claims13
A pressure sensor comprising:
- a hollow cylindrical metal case having a hollow part in which an oil passage is formed;
- a pressure sensing diaphragm, placed at one end of the hollow cylindrical metal case, distorted by receiving a pressure;
- a pressure sensing unit placed at the other end of the hollow cylindrical metal case;
- and
- a pressure transmission member, placed in the hollow part of the hollow cylindrical metal case, through which the pressure detected by the pressure sensing diaphragm is transmitted to the pressure sensing unit,
- wherein thermal energy of the pressure sensing diaphragm and the pressure sensing unit is radiated through an oil which flows in the oil passage.
An attaching mechanism of a pressure sensor comprising:
- a hollow cylindrical metal case;
- a pressure sensing diaphragm, placed at one end of the hollow cylindrical metal case, distorted by receiving a pressure;
- a pressure sensing unit placed at the other end of the hollow cylindrical metal case;
- a pressure transmission member, placed at a hollow part of the hollow cylindrical metal case, transmitting the pressure detected by the pressure sensing diaphragm to the pressure sensing unit;
- and an attaching member in which the oil flows, wherein the pressure sensor is attached and fixed to the attaching member by inserting the hollow cylindrical metal case of the pressure sensor into an attaching hole formed in the attaching member, and
- wherein the hollow cylindrical metal case has an oil passage through which an oil flows,
- an oil transmitting pipe member and an oil returning pipe member are formed between the attaching member and the pressure sensor, in which the oil is transmitted to the oil passage through the oil transmitting pipe member, and the oil is returned to the attaching member from the oil passage through the oil returning pipe member,
- and thermal energy of the pressure sensing diaphragm and the pressure sensing unit is radiated through the oil flowing from the attaching member to the hollow part through the oil transmitting pipe member and the oil passage, and through the oil flowing from the hollow part to the attaching member through the oil passage and the oil returning pipe member.
Dependencies are inferred from the claim text.