JPS59186427U

JPS59186427U - Diesel engine supply air temperature control device

Info

Publication number: JPS59186427U
Application number: JP8282383U
Authority: JP
Inventors: 山手　友士
Original assignee: ダイハツデイ−ゼル株式会社
Priority date: 1983-05-30
Filing date: 1983-05-30
Publication date: 1984-12-11

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図はこの考案の実施例の模式図で高負荷時の状態を
示す、第２図は第１図の装置の低負荷時における要部模
式図、第３図はこの考案のいまひとつの実施例の模式図
で高負荷時の上体を示す、第４図は第３図の装置の低負
荷時における一部模弐図、第５図は従来装置における負
荷と給気温度の関係を表すグラフ、第６図はこの考案の
装置における負荷と給気温度の関係を表すグラフである
。１・・・ディーゼル機関、２・・・過給機、３・・・第
１段空気冷却器、４・・・第２段空気冷却器、５．１４
・・・冷却水ポンプ、６・・・機関出口温度調節弁、７
〜　　　　′１３・・・ジャケット系冷却水回路、１５
・・・空気冷却器用温度調節弁、１８〜２２・・・クー
ラ系冷却水回路、３３・・・切替弁、３７・・・給気管
、３８・・・温度センサ。Figure 1 is a schematic diagram of an embodiment of this invention, showing the state under high load. Figure 2 is a schematic diagram of the main parts of the device shown in Figure 1 at low load. Figure 3 is another implementation of this invention. An example schematic diagram shows the upper body at high load. Figure 4 is a partial mock-up of the device in Figure 3 at low load. Figure 5 shows the relationship between load and supply air temperature in a conventional device. The graph shown in FIG. 6 is a graph showing the relationship between load and supply air temperature in the device of this invention. 1... Diesel engine, 2... Supercharger, 3... First stage air cooler, 4... Second stage air cooler, 5.14
...Cooling water pump, 6...Engine outlet temperature control valve, 7
~ '13... Jacket system cooling water circuit, 15
... Temperature control valve for air cooler, 18-22 ... Cooler system cooling water circuit, 33 ... Switching valve, 37 ... Air supply pipe, 38 ... Temperature sensor.

Claims

[Scope of utility model registration request]

(1) A first-stage air cooler located downstream of the supercharger and connected to a jacket cooling water circuit that circulates high-temperature cooling water; a second stage air cooler connected to a circulating cooler system cooling water circuit; an air cooler temperature control valve connected to the cooler system cooling water circuit and adjusting the flow rate of cooling water to the second stage air cooler;
and a switching valve for opening and closing the temperature control valve for the air cooler, and in a high load area, the air is cooled by the first stage 5 and the second stage air cooler,
A supply air temperature control device for a diesel engine, characterized in that in a low load range, only the first stage air cooler functions to increase the supply air temperature.

(2) The switching valve operates as soon as a low load range is detected, and operates the air cooler temperature control valve to stop the supply of cooling water to the second stage air cooler. The device according to claim 1 of the utility model registration claim.

(3) The device according to claim 2, wherein the air cooler temperature control valve is provided with an adjustment screw for setting the valve opening degree during high load.

(4) The air cooler temperature control valve is hydraulically driven, and the switching valve is an electrohydraulic switching valve that controls opening and closing of the air cooler temperature control valve in response to a command signal. Utility model registration - device according to claim 2.

(5) The supply air temperature should be kept at the set value during high loads (,
Claim 4 of the utility model registration claim 4, comprising a temperature sensor that automatically controls the driving oil pressure of the temperature control valve for the air cooler according to the air outlet temperature of the second stage air cooler. □Equipment.