JPS5997250U

JPS5997250U - Engine brake force increase device

Info

Publication number: JPS5997250U
Application number: JP19222282U
Authority: JP
Inventors: 木村　譲二
Original assignee: いすゞ自動車株式会社
Priority date: 1982-12-21
Filing date: 1982-12-21
Publication date: 1984-07-02

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図は本考案のエンジンブレーキ力増大装置が採用さ
れる内燃機関の動弁機構を示す概略構成図、第２図は第
１図の■−■線矢視図、第３図は第２図の■−■線矢視
図、第４図イは従来の内燃　　　７機関のエンジンブレ
ーキ力作用時を示すＰ−ｖ線図、口は本考案によるエン
ジンブレーキ力増大装置を備えた内燃機関のエンジンブ
レーキ力作用時を示すｐ−ｖ線図である。図中、２はロッカシャフト、３はロッカアーム、４はカ
ム軸、７は排気弁（又は吸気弁）、９は第１ブツシュ部
材、１０は第２ブツシユ部材１，１１はサブロッカアー
ム、３７は補助弁作動手段である。Fig. 1 is a schematic configuration diagram showing the valve mechanism of an internal combustion engine in which the engine braking force increasing device of the present invention is adopted, Fig. 2 is a view taken along the line ■-■ in Fig. 1, and Fig. 3 is a Figure 4A is a P-V diagram showing when the engine braking force is applied in a conventional internal combustion engine. FIG. 3 is a p-v diagram showing when engine braking force is applied. In the figure, 2 is a rocker shaft, 3 is a rocker arm, 4 is a camshaft, 7 is an exhaust valve (or intake valve), 9 is a first bushing member, 10 is a second bushing member 1, 11 is a sub-rocker arm, and 37 is an auxiliary bushing member. It is a valve actuation means.

Claims

[Scope of utility model registration request]

In an internal combustion engine that opens and closes an intake valve and an exhaust valve by swinging a rocker arm pivotally supported on a rocker shaft by the rotational drive of a camshaft, a first bushing member eccentrically attached to the rocker shaft; a second bushing member fitted eccentrically to the first bushing member;
The rotational driving force from the camshaft is transmitted to the brake member, and the intake air compressed by the compression stroke is exhausted from the latter half of the compression stroke to the first half of the expansion stroke of the internal combustion engine.
a sub-rocker arm that swings to open at least one of an intake valve and an exhaust valve; and a sub-rocker arm that oscillates to open at least one of an intake valve and an exhaust valve; Increasing engine braking force of an internal combustion engine, characterized by comprising auxiliary valve operating means for rotating eccentric portions of the member in opposite directions to move the sub-rocker arm downward to open the intake valve or the exhaust valve. Device. −