JPS60137141U

JPS60137141U - Diesel engine combustion noise reduction device

Info

Publication number: JPS60137141U
Application number: JP2383684U
Authority: JP
Inventors: 江藤　幸寛
Original assignee: 日産自動車株式会社
Priority date: 1984-02-23
Filing date: 1984-02-23
Publication date: 1985-09-11

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図は本考案の１実施例を示す構成図、第２図は同上
に用いた作動出力特性図であって、夫々Ａはエンジン始
動検出手段、Ｂは大気圧力検出手段、Ｃはエンジン温度
検出手段に関する。２・・・吸気通路、３・・・吸気絞弁、４・・・主通路
、６・・・副通路、７・・・加熱管、１１・・・ダイア
フラム装置、１３・・・電磁弁、１４・・・バキューム
タンク、１９・・・電磁弁開閉駆動回路、２０・・・エ
ンジン低速低負荷検出手段、３０・・・作動制限手段、
３１・・−エンジン始動検出手段、３２・・・大気圧力
検出手段、３３・・・エンジン温度検出手段。FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG. 2 is an operating output characteristic diagram used in the same example, in which A is an engine start detection means, B is an atmospheric pressure detection means, and C is an engine temperature Regarding detection means. 2... Intake passage, 3... Intake throttle valve, 4... Main passage, 6... Sub passage, 7... Heating pipe, 11... Diaphragm device, 13... Solenoid valve, 14... Vacuum tank, 19... Solenoid valve opening/closing drive circuit, 20... Engine low speed and low load detection means, 30... Operation restriction means,
31... Engine start detection means, 32... Atmospheric pressure detection means, 33... Engine temperature detection means.

Claims

[Claims for Utility Model Registration] An intake passage consisting of two systems, a main passage and a sub-passage equipped with a heating means, an intake throttle valve for controlling the amount of intake air led to the main sub-passage, and an engine. means for detecting a low speed, low load state; and control means for controlling the operation of the intake throttle valve so as to guide substantially the entire amount of intake air to the passage when the means detects a low speed and low load state of the engine. A combustion noise reduction device for a diesel engine, comprising: an atmospheric pressure detection means, an engine start detection means, an engine temperature detection means, and an atmospheric pressure region below a predetermined value based on a 0 detection signal of these detection means. C.) Canceling the intake throttle valve operation control under at least one operating condition when the engine is started and in an engine temperature range below a predetermined value;
1. A combustion noise reduction device for a diesel engine, comprising: operation limiting means configured to guide intake air passing through the auxiliary passage into the main intake passage.