Combustion pressure sensor
AssigneeDenso Corporation
InventorsShoichi TAKEMOTO, Syuichi NAKANO, Nobuyuki ABE, Kenji ITO, Takashi FURUKAWA
Life of this patent
Estimating the term…
Abstract
In a combustion pressure sensor, a sensor holder is installed in a housing. The sensor holder has an end contact surface. A load transfer member is installed in the housing. The load transfer member has a contact surface facing the end contact surface of the sensor holder. The contact surface of the load transfer member is in contact with the end contact surface of the sensor holder. One of the contact surface of the load transfer member and the end contact surface of the sensor holder has a concavely curved shape, and the other thereof has a convexly curved shape.
Claims9
A combustion pressure sensor comprising:
- a hollow longitudinal housing to be mounted in a plug mount hole of an engine with a combustion chamber, the plug mount hole communicating with the combustion chamber of the engine, the housing including a support portion having a support surface;
- a sensor holder installed in the housing, the sensor holder having an end contact surface at one end thereof;
- a load transfer member installed in the housing for transferring a compressive stress applied to the housing to the sensor holder as a load,
- the load transfer member having a first contact surface at a first end thereof and a second contact surface at a second end thereof, opposite to the first end, in the longitudinal direction of the housing,
- the first contact surface of the load transfer member being in contact with the support surface of the support portion of the housing,
- the second contact surface of the load transfer member being in contact with the end contact surface of the sensor holder;
- and
- a pressure sensor mechanism, held by the sensor holder, for obtaining a pressure in the combustion chamber based on the load transferred thereto from the load transfer member,
- wherein the combustion pressure sensor comprises at least one of a first configuration and a second configuration,
- the first configuration representing that one of the first contact surface and the support surface has a concavely curved shape and the other thereof has a convexly curved shape,
- the second configuration representing that one of the second contact surface and the end contact surface has a concavely curved shape and the other thereof has a convexly curved shape.
A combustion pressure sensor comprising:
- a hollow longitudinal housing to be mounted in a plug mount hole of an engine with a combustion chamber, the plug mount hole communicating with the combustion chamber of the engine;
- a sensor holder installed in the housing, the sensor holder having an end with a concavely curved contact surface;
- a load transfer member installed in the housing for transferring a compressive stress applied to the housing to the sensor holder as a load, the load transfer member having an end facing the end of the sensor holder, the end of the load transfer member having a concavely curved contact surface;
- a pressure sensor mechanism, held by the sensor holder, for obtaining a pressure in the combustion chamber based on the load transferred thereto from the load transfer member;
- and
- a joint member installed in the housing and interposed between the first end of the sensor holder and the second end of the load transfer member,
- the joint member having a first convexly curved end surface and a second convexly curved end surface opposite to each other in the longitudinal direction of the housing,
- the concavely curved contact surface of the sensor holder being in contact with the first convexly curved end surface of the joint member,
- the concavely curved contact surface of the load transfer member being in contact with the second convexly curved end surface of the joint member.
Dependencies are inferred from the claim text.