JPS616748U

JPS616748U - Internal combustion engine combustion chamber pressure detection device

Info

Publication number: JPS616748U
Application number: JP9091284U
Authority: JP
Inventors: 明夫保坂
Original assignee: 日産自動車株式会社
Priority date: 1984-06-20
Filing date: 1984-06-20
Publication date: 1986-01-16

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は、本考案を適用した内燃機関制御装置の構成例
を示す図、第２図は圧カセンサの構造を示す図、第３図
は本考案の一実施例を示す図、第４図は第３図における
各信号の波形図である。１・・・内燃機関、２・・・吸気管、３・・・排気管、
４・・・スロットル弁、５・・・スロットルセンサ、６
・・・バイパス管、７・・・空気量調節器、８・・・吸
入空気量センサ、９・・・燃料噴射弁、１０・・・排気
センサ、１１・・・排気還流管、１２・・・還流量調節
器、１３・・・点火装置、１４・・・クランク角センサ
、１５・・・水温センサ、１６・・・圧カセンサ、１７
・・・演算装置、１９・・・燃焼室壁、２０・・・圧電
素子、２１・・・ＣＰＵ，，２２’・・・ＲＡＭ，２３
・・・ＲＯＭ，２４・・・Ｉ／Ｏ、２５・・・Ａ／Ｄ変
換器、２６・・・チャージアンプ、２７・・・最小値検
出回路、２８・・・減算回路、Ｓ１・・・吸入空気量信
号、Ｓ２・・・スロットル信号、Ｓ３・・・温度信号、
Ｓ４・・・単位角信号、Ｓ５・・・基準角信号、Ｓ６・
・・圧力信号、Ｓ７・・・空燃比信号、Ｓ８・・・流量
制御−信号、Ｓ９・・・噴射信号、ＳＩＯ・・・還流量
制御信号、Ｓ１・１・・・点火信号、５１２・・・圧力
電圧信号、Ｓ１３・・・最小値信号、５１４・・・差信
号、５１７・・・仙指令信号、Ｓ１８・・・デジタル圧
力信号。FIG. 1 is a diagram showing an example of the configuration of an internal combustion engine control device to which the present invention is applied, FIG. 2 is a diagram showing the structure of a pressure sensor, FIG. 3 is a diagram showing an embodiment of the present invention, and FIG. is a waveform diagram of each signal in FIG. 3. 1... Internal combustion engine, 2... Intake pipe, 3... Exhaust pipe,
4... Throttle valve, 5... Throttle sensor, 6
... Bypass pipe, 7... Air amount regulator, 8... Intake air amount sensor, 9... Fuel injection valve, 10... Exhaust sensor, 11... Exhaust recirculation pipe, 12... - Return amount regulator, 13... Ignition device, 14... Crank angle sensor, 15... Water temperature sensor, 16... Pressure sensor, 17
... Arithmetic device, 19 ... Combustion chamber wall, 20 ... Piezoelectric element, 21 ... CPU, , 22' ... RAM, 23
...ROM, 24...I/O, 25...A/D converter, 26...charge amplifier, 27...minimum value detection circuit, 28...subtraction circuit, S1... Intake air amount signal, S2...throttle signal, S3...temperature signal,
S4...Unit angle signal, S5...Reference angle signal, S6.
...Pressure signal, S7...Air-fuel ratio signal, S8...Flow rate control signal, S9...Injection signal, SIO...Recirculation amount control signal, S1.1...Ignition signal, 512... - Pressure voltage signal, S13...minimum value signal, 514...difference signal, 517...sensor command signal, S18...digital pressure signal.

Claims

[Scope of utility model registration request]

(1) A pressure sensor that detects the pressure in the combustion chamber, a conversion means that converts the output of the pressure sensor into a voltage signal, a minimum value detection means that detects the minimum value of the voltage signal, and a A combustion chamber pressure detection device for an internal combustion engine, comprising: a correction means for offsetting the military pressure signal.

(2) When the voltage signal is 312, the signal representing the minimum value is 313, and the input allowable lower limit value in the next stage of the correction means is Smin, an offset of S 1 2 - S 1 3 + Smin is performed. A combustion chamber pressure detection device for an internal combustion engine according to claim 1, characterized in that: