公开(公告)号：EP0179611A2

公开(公告)日：1986-04-30

申请号：EP85307444.1

申请日：1985-10-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Paganelli, Jude V. ,  Pundarika, Eshwarahalli S. ,  Shukla, Vishwa ,  Padovani, Francois A. ,  Cooper, Lawrence

IPC: G01L23/24 ,  G01L9/08 ,  G01L23/10

CPC classification number: G01L23/10 ,  G01L9/008

Abstract: A cylinder pressure transmitter has a body with a chamber open at one end accommodating pressure responsive piezoelectric means. A cup-shaped diaphragm member has a side wall secured with a laser weld to a neck portion of the body which is formed as a rim around the chamber opening. The bottom of the member extends over the opening and has a slightly domed portion exposed to the pressure in a cylinder of an internal combustion engine to serve as a diaphragm responsive to variations in cylinder pressure to apply corresponding pressure forces to the piezoelectric means, thereby to provide initial electrical signals corresponding to the cylinder pressures. Electronic means are carried on the body to amplify the initial electrical signals for transmission to computer control means at a location remote from the cylinder for regulating engine operation to improve performance. Force transmitting means such as a metal ball and a ceramic socket are arranged in sequence to be movable in the body chamber, include materials of relatively low thermal conductivity, and have portions of different areas and crosssections cooperating between the diaphragm member bottom and the piezoelectric means for accurately transmitting pressure forces from the diaphragm to the piezoelectric means while retarding transfer of heat from the cylinder environment to the piezoelectric means through the diaphragm.

Abstract translation: 气缸压力变送器具有主体，该主体具有一端容纳压力响应压电装置的开口。 杯形隔膜构件具有用激光焊接固定到主体的颈部的侧壁，其形成为围绕室开口的边缘。 构件的底部延伸越过开口并且具有暴露于内燃机的气缸中的压力的​​略微圆顶部分，以用作响应于气缸压力变化的隔膜，以将相应的压力施加到压电装置，从而 提供对应于气缸压力的初始电信号。 电子装置被承载在身体上以放大初始电信号，以便在远离气缸的位置处传送到计算机控制装置，用于调节发动机操作以改善性能。 力传递装置如金属球和陶瓷插座依次布置成可以在主体腔中移动，包括导热性相对较低的材料，并且具有在隔膜构件底部和压电装置之间配合的不同区域和横截面的部分 用于将压力从隔膜精确地传递到压电装置，同时延迟通过隔膜将热量从气缸环境传递到压电装置。

公开(公告)号：EP0179611A3

公开(公告)日：1989-02-22

申请号：EP85307444.1

申请日：1985-10-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Paganelli, Jude V. ,  Pundarika, Eshwarahalli S. ,  Shukla, Vishwa ,  Padovani, Francois A. ,  Cooper, Lawrence

IPC: G01L23/24 ,  G01L9/08 ,  G01L23/10

CPC classification number: G01L23/10 ,  G01L9/008

Abstract: A cylinder pressure transmitter has a body with a chamber open at one end accommodating pressure responsive piezoelectric means. A cup-shaped diaphragm member has a side wall secured with a laser weld to a neck portion of the body which is formed as a rim around the chamber opening. The bottom of the member extends over the opening and has a slightly domed portion exposed to the pressure in a cylinder of an internal combustion engine to serve as a diaphragm responsive to variations in cylinder pressure to apply corresponding pressure forces to the piezoelectric means, thereby to provide initial electrical signals corresponding to the cylinder pressures. Electronic means are carried on the body to amplify the initial electrical signals for transmission to computer control means at a location remote from the cylinder for regulating engine operation to improve performance. Force transmitting means such as a metal ball and a ceramic socket are arranged in sequence to be movable in the body chamber, include materials of relatively low thermal conductivity, and have portions of different areas and crosssections cooperating between the diaphragm member bottom and the piezoelectric means for accurately transmitting pressure forces from the diaphragm to the piezoelectric means while retarding transfer of heat from the cylinder environment to the piezoelectric means through the diaphragm.

公开(公告)号：EP0179611B1

公开(公告)日：1991-09-11

申请号：EP85307444.1

申请日：1985-10-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Paganelli, Jude V. ,  Pundarika, Eshwarahalli S. ,  Shukla, Vishwa ,  Padovani, Francois A. ,  Cooper, Lawrence

IPC: G01L23/24 ,  G01L9/08 ,  G01L23/10

CPC classification number: G01L23/10 ,  G01L9/008