JPS616749U

JPS616749U - Internal combustion engine combustion chamber pressure detection device

Info

Publication number: JPS616749U
Application number: JP9091384U
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 the drawing]

第１図および第図は、従来から知られているチャージア
ンプの構成および出力特性を示す図、第３図は本考案を
適用する内燃機関制御装置を示す図、第４図は圧カセン
サの構造を示す図、第５図は本考案の一実施例を示すブ
ロック図、第６図、は第５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、１８・・・点火プラグ、１９・・・燃
焼室壁、２０・・・圧電素子、２１・・・ＣＰＵ，２２
・・・ＲＡＭ，２３・・・ＲＯＭ，２４・・・Ｉ／Ｏ、
２６・・・チャージアンプ、２８・・・減算回路、３０
・・・カウンタ、３１・・・比較器、３２・・・レジス
タ、３４・・・単安定マルチパイブレータ、３５・・・
サンプル１ホールド回路、３６・・・加算回路、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、８１
０・・・還流量制御信号、Ｓｌｌ・・・点火信号、Ｓ１
２・・・圧力電圧信号、Ｓ１４・・・差信号、Ｓ２１・
・・トリガ信号、Ｓ２５・・・サンプリング信号、Ｓ２
６・・・サンプル１ホールド信号、Ｓ２７・・・基準圧
力信号、３２８・・・修正圧力電圧信号。Figures 1 and 4 are diagrams showing the configuration and output characteristics of a conventionally known charge amplifier, Figure 3 is a diagram showing an internal combustion engine control device to which the present invention is applied, and Figure 4 is a diagram showing the structure of a pressure sensor. FIG. 5 is a block diagram showing an embodiment of the present invention, and FIG. 6 is a waveform diagram of each signal in FIG. 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, 18... Spark plug, 19... Combustion chamber wall, 20... Piezoelectric element, 21... CPU, 22
...RAM, 23...ROM, 24...I/O,
26...Charge amplifier, 28...Subtraction circuit, 30
... Counter, 31... Comparator, 32... Register, 34... Monostable multivibrator, 35...
Sample 1 hold circuit, 36... Addition 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, 81
0...Recirculation amount control signal, Sll...Ignition signal, S1
2...Pressure voltage signal, S14...Difference signal, S21.
...Trigger signal, S25...Sampling signal, S2
6...Sample 1 hold signal, S27...Reference pressure signal, 328...Corrected pressure voltage signal.

Claims

[Scope of utility model registration request]

pressure detection means for detecting the pressure in the combustion chamber of the internal combustion engine and sending out a pressure signal; means for detecting the crank angle of the engine; and comparison means for capturing the pressure signal at a predetermined crank angle and comparing it with a reference pressure value; A combustion chamber pressure detection device for an internal combustion engine, comprising means for correcting the pressure signal according to the output of the comparison means.