The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 2020
Filed:
Feb. 27, 2017
Citizen Finedevice Co., Ltd., Minamitsuru-gun, Yamashi, JP;
Citizen Watch Co., Ltd., Nishitokyo-shi, Tokyo, JP;
Yuta Kanamori, Minamitsuru-gun, JP;
Tetsuya Aiba, Minamitsuru-gun, JP;
Masanori Yomoyama, Minamitsuru-gun, JP;
Satoshi Sue, Minamitsuru-gun, JP;
CITIZEN FINEDEVICE CO., LTD., Yamanashi, JP;
CITIZEN WATCH CO., LTD., Tokyo, JP;
Abstract
A pressure detecting device that detects the combustion pressure in an internal combustion engine includes: a piezoelectric element that outputs a charge signal corresponding to the pressure in a combustion chamber; and a mounting board on which are mounted an integrating circuit that integrates the charge signal outputted by the piezoelectric element and an amplifier circuit that amplifies a voltage signal obtained by integration. On the mounting board are provided: a power receiving terminal that receives a power-supply voltage from a controller; an output terminal that outputs an output signal after amplification to the controller; and a grounding terminal for making the ground of the controller and the mounting board common. Furthermore, in the mounting board, the grounding terminal and grounding ends of the integrating circuit and the amplifier circuit are connected by way of grounding ferrite beads.