Title:
多気筒エンジンの燃焼圧データ収集システム
Document Type and Number:
Japanese Patent JP4094475
Kind Code:
B2
Abstract:
A combustion-pressure-data acquisition system of a multi-cylinder engine according to the present invention includes an in-cylinder pressure sensor CPS#n for directly detecting combustion pressure in each cylinder; an amplifier unit AP#n to which the in-cylinder pressure sensor CPS#n for each cylinder is connected; and a channel switching unit MUX to which the amplifier unit AP#n for each cylinder is connected. It selects a system to be measured from among a plurality of systems of signals from the amplifier units AP#n with a channel selection signal outputted from an engine-controlling electronic control unit and outputs combustion pressure data to the ECU. Further, it outputs to an amplifier unit AP#n with which measurement ends a reset signal for discharging the electric charge between the in-cylinder pressure sensor CPS#n and the amplifier circuit to efficiently acquire combustion pressure data of each cylinder with a simple structure without complicated processing.
Inventors:
Kashiwase Ichi
Hiromichi Watanabe
Hiroshi Yokoyama
Hiromichi Watanabe
Hiroshi Yokoyama
Application Number:
JP2003116073A
Publication Date:
June 04, 2008
Filing Date:
April 21, 2003
Export Citation:
Assignee:
Fuji Heavy Industries Ltd.
Citizen Finetech Co., Ltd.
Citizen Finetech Co., Ltd.
International Classes:
F02D45/00; F02D35/02
Domestic Patent References:
| JP2000045857A | ||||
| JP63044133U |
Attorney, Agent or Firm:
Susumu Ito