Semiconductor pressure sensor
First Claim
1. A pressure sensor to be mounted on an intake system module of an engine, comprising:
- a sensor IC having a pressure sensor element covered with mold resin, the mold resin being provided with a pressure introduction hole extending outward from the pressure sensor element so as to open to an outer surface thereof;
a board on which the sensor IC is mounted;
a case in which the sensor IC and the board are accommodated, the case being provided with a pressure introduction inlet penetrating a wall thereof wherein the case is directly attached to an outer wall of the intake system module so that the pressure introduction inlet is opposed to a pressure introduction outlet provided in the outer wall; and
an interposed member including a resilient member and having a communication hole, the interposed member being entirely disposed between an inner wall of the case and the outer surface of the mold resin so as to allow the pressure introduction inlet to communicate with the pressure introduction hole without air leakage.
1 Assignment
0 Petitions
Accused Products
Abstract
In an ECU in which a sensor IC and various engine control devices are mounted on a board in a case, the sensor IC has a pressure sensor element covered with mold resin having a pressure introduction hole extending outward from the pressure sensor element so as to open to an outer surface thereof. A cylindrical resilient member is disposed and resiliently deformed between an inner wall of the case and the outer surface of the mold resin so as to allow a pressure introduction inlet formed in the case to communicate with the pressure introduction hole and not to communicate with places where the engine control devices are mounted. The case of ECU is fixed to a surge tank so that a pressure introduction outlet formed in the surge tank communicates directly with the pressure introduction inlet.
16 Citations
9 Claims
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1. A pressure sensor to be mounted on an intake system module of an engine, comprising:
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a sensor IC having a pressure sensor element covered with mold resin, the mold resin being provided with a pressure introduction hole extending outward from the pressure sensor element so as to open to an outer surface thereof; a board on which the sensor IC is mounted; a case in which the sensor IC and the board are accommodated, the case being provided with a pressure introduction inlet penetrating a wall thereof wherein the case is directly attached to an outer wall of the intake system module so that the pressure introduction inlet is opposed to a pressure introduction outlet provided in the outer wall; and an interposed member including a resilient member and having a communication hole, the interposed member being entirely disposed between an inner wall of the case and the outer surface of the mold resin so as to allow the pressure introduction inlet to communicate with the pressure introduction hole without air leakage. - View Dependent Claims (2, 3, 4, 5)
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6. A pressure sensor to be mounted on an intake system module of an engine, the pressure sensor comprising:
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a sensor IC mounted on a board, the sensor IC having a pressure sensor element covered with a mold resin, the mold resin being provided with a pressure introduction hole extending outward from the pressure sensor element so as to open to an outer surface thereof; a case in which the sensor IC and the board are accommodated, the case having a pressure introduction inlet penetrating a wall thereof, the case being directly fixed to an outer wall of the intake system module so that the pressure introduction inlet is opposed to a pressure introduction outlet provided in the outer wall; and a resilient member having a communication hole, the resilient member being entirely interposed between and contacting an inner wall of the case and the outer surface of the mold resin so as to allow the pressure introduction inlet to communicate with the pressure introduction hole without air leakage. - View Dependent Claims (7, 8, 9)
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Specification