Pressure sensor for an internal combustion engine
AssigneeSiemens Aktiengesellschaft
InventorsPeter Kleinschmidt, Valentin Magori
Life of this patent
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Abstract
A pressure sensor for an internal combustion engine has a piezoceramic transducer in an operating connection, by way of a plunger, with a membrane, the sensor being secured in a cylinder head of an internal combustion engine with the membrane located within a cylinder. The pressure sensor serves for detecting knock and ping.
Claims19
A pressure sensor for an internal combustion engine which has an engine wall with a bore therethrough, the wall partially defining an engine cylinder, comprising:
- a housing including an elongate, first housing section adapted to be received through the bore and sealed gas-tight to the wall, said section including a first end to be positioned within the cylinder and a membrane at said first end continuous with said housing to be subjected to the pressures within the cylinder, and a second housing section including means defining a threaded recess;
- a pressure/electrical transducer threadedly mounted in the housing recess including output signal connections and responsive to forces applied thereto to produce corresponding output signals;
- and
- a force connection element mechanically coupled between said membrane and said transducer.
A pressure sensor for an internal combustion engine which has an engine wall with a bore therethrough, the wall partially defining an engine cylinder, comprising:
- a housing including an elongate, first housing section adapted to be received through the bore and sealed gas-tight to the wall, said section including a first end including a first shoulder, to be positioned within the cylinder and a membrane at said first end mounted on said first shoulder to be subjected to the pressures within the cylinder, and a second housing section including means defining a threaded recess;
- a pressure/electrical transducer threadedly mounted in the housing recess including output signal connections and responsive to forces applied thereto to produce corresponding output signals;
- and
- a force connection element mechanically coupled between said membrane and said transducer,
- said first housing section including an elongate bore therethrough receiving said force connection element therethrough, and an internal second shoulder spaced from said membrane, said force connection element comprising a ring bearing against said second shoulder to relieve said transducer of stress in a state of rest.
A pressure sensor for an internal combustion engine which has an engine wall having a bore therethrough, which wall partially defines an engine cylinder, comprising:
- a housing including a housing section adapted to be received through the bore and sealed gas-tight to the wall, said section including a first end to be positioned within the cylinder and a membrane at said first end to be subjected to pressures within the cylinder;
- said housing wall including a second end comprising a recess which includes internal threads;
- a pressure/electrical transducer mounted in said recess of said housing, said transducer including output signal connections and responsive to forces to produce a corresponding signal, said transducer comprising a piezoceramic plate, and a metal plate covering said piezoceramic plate and facing the internal combustion engine, said metal plate including edge threads for engaging said internal threads of said recess;
- and
- an element mechanically coupled between said membrane and said transducer for transmitting forces from the cylinder to said transducer.
A pressure sensor for an internal combustion engine which has an engine wall with a bore therethrough, the wall partially defining an engine cylinder, comprising:
- a housing including an elongate first housing section adapted to be received through the bore and sealed gas-tight to the wall, said section including a first end including a shoulder, to be positioned within the cylinder and a membrane at said first end mounted on said shoulder to be subjected to the pressures within the cylinder, and a second housing section including means defining a threaded recess;
- a pressure/electrical transducer threadedly mounted in the housing recess including output signal connections and responsive to forces applied thereto to produce corresponding output signals, said transducer comprising a piezoceramic plate and a metal plate carrying said piezoceramic plate and including edge threads for threadedly engaging the threads of said threaded recess;
- and
- a force connection element mechanically coupled between said membrane and said metal plate.
Dependencies are inferred from the claim text.