JPH0212034U

JPH0212034U -

Info

Publication number: JPH0212034U
Application number: JP8935488U
Authority: JP
Priority date: 1988-07-05
Filing date: 1988-07-05
Publication date: 1990-01-25
Anticipated expiration: 2003-07-05
Also published as: JPH0732920Y2

Description

[Brief explanation of drawings]

第１図〜第９図は本考案の一実施例を説明する
ためのものであつて、第１図は暖機装置の概略構
成図、第２図はアクチユエータ及びこのアクチユ
エータにて作動される排気ブレーキバルブを示す
断面図、第３図は第２図における−線矢視図
、第４図は第３図における−線断面図、第５
図は排気管の正面図、第６図は第５図における
−線断面図、第７図は排気管内の排気ブレーキ
バルブの動作を示す断面図、第８図は排気ブレー
キバルブの回動角と排気ガス通路面積との関係を
示す特性図、第９図はエンジン回転数とエンジン
排気ガス圧力との関係を示す特性図、第１０図及
び第１１図は従来例を示すものであつて、第１０
図は第５図と同様の正面図、第１１図は第７図と
同様の断面図である。１……燃料直接噴射式のデイーゼルエンジン、
３……吸気管、５……排気管、５ａ……内周面、
５ｂ……排気ガス逃げ部、２７……アクチユエー
タ、３７……出力ロツド、４２……プレート、４
３……回動軸、４３……排気ブレーキバルブ、４
６……回動レバー、４９……附勢部材としての圧
縮スプリング、Ｘ……排気管の軸心、Ｙ……円錐
台形状の排気ガス逃げ部の軸心。 Figures 1 to 9 are for explaining one embodiment of the present invention, in which Figure 1 is a schematic diagram of a warm-up device, and Figure 2 is an actuator and an exhaust gas operated by this actuator. 3 is a sectional view showing the brake valve; FIG. 3 is a sectional view taken along the - line in FIG. 2; FIG.
Figure 6 is a front view of the exhaust pipe, Figure 6 is a sectional view taken along the - line in Figure 5, Figure 7 is a sectional view showing the operation of the exhaust brake valve in the exhaust pipe, and Figure 8 is the rotation angle of the exhaust brake valve. FIG. 9 is a characteristic diagram showing the relationship between the exhaust gas passage area, FIG. 9 is a characteristic diagram showing the relationship between engine speed and engine exhaust gas pressure, and FIGS. 10 and 11 are conventional examples. 10
The figure is a front view similar to FIG. 5, and FIG. 11 is a sectional view similar to FIG. 7. 1... Diesel engine with direct fuel injection,
3...Intake pipe, 5...Exhaust pipe, 5a...Inner peripheral surface,
5b... Exhaust gas escape part, 27... Actuator, 37... Output rod, 42... Plate, 4
3... Rotating shaft, 43... Exhaust brake valve, 4
6... Rotating lever, 49... Compression spring as a biasing member, X... Axis center of exhaust pipe, Y... Axis center of truncated conical exhaust gas relief part.

Claims

[Scope of utility model registration request]

A rotating shaft is disposed at a position offset from the axis of the exhaust pipe of the engine, and an exhaust brake valve that rotates about the rotating shaft is disposed within the exhaust pipe to be used as a warm-up valve. A warm-up device for a vehicle, characterized in that a portion of the exhaust pipe downstream of exhaust gas has a larger inner diameter than a portion of the exhaust pipe that is fully closed by the exhaust brake valve.