JPS61169207U

JPS61169207U -

Info

Publication number: JPS61169207U
Application number: JP5277985U
Authority: JP
Priority date: 1985-04-11
Filing date: 1985-04-11
Publication date: 1986-10-20
Anticipated expiration: 2000-04-11
Also published as: JPH0544483Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るエンジンブレ
ーキ装置の主要部の構造を表わす概念図、第２図
ａは補助排気通路閉塞手段の構造を表わす概念図
、第２図ｂは第２図ａ中の―線断面において
吸気弁閉状態時の作動概念図、第２図ｃは第２図
ａ中の―線断面において吸気弁開状態時の作
動概念図、第３図は第１図に示したエンジンブレ
ーキ装置の開弁工程図、第４図は電磁弁を用いた
補助排気通路閉塞手段の構造を表わす概念図、第
５図ａは排出弁を用いた補助排気通路閉塞手段の
構造を表わす概念図、第５図ｂは第５図ａ中Ａ部
の拡大図である。図面中、１１は燃焼室、１２は吸気通路、１３
は排気通路、１４は補助排気通路、１５は吸気弁
、１６は排気弁、１７はピストン、１８は補助排
気弁、２２は油圧ポンプ、２４は排出路、２５は
制御装置、２７は電磁弁、２９は排出弁である。 FIG. 1 is a conceptual diagram showing the structure of the main parts of an engine braking device according to an embodiment of the present invention, FIG. 2 a is a conceptual diagram showing the structure of the auxiliary exhaust passage closing means, and FIG. Fig. 2c is a conceptual diagram of the operation when the intake valve is in the closed state in the cross section taken along the - line in Fig. 2a; Figure 4 is a conceptual diagram showing the structure of the auxiliary exhaust passage closing means using a solenoid valve, and Figure 5a shows the structure of the auxiliary exhaust passage closing means using a discharge valve. The conceptual diagram shown in FIG. 5b is an enlarged view of section A in FIG. 5a. In the drawing, 11 is a combustion chamber, 12 is an intake passage, and 13 is a combustion chamber.
14 is an exhaust passage, 14 is an auxiliary exhaust passage, 15 is an intake valve, 16 is an exhaust valve, 17 is a piston, 18 is an auxiliary exhaust valve, 22 is a hydraulic pump, 24 is an exhaust passage, 25 is a control device, 27 is a solenoid valve, 29 is a discharge valve.

Claims

[Scope of utility model registration request]

an auxiliary exhaust passage whose both ends communicate with the combustion chamber of the engine and the exhaust passage; an auxiliary exhaust valve provided reciprocatingly so as to close the auxiliary exhaust passage; and an auxiliary exhaust valve drive that opens and closes the auxiliary exhaust valve. and a device that determines the operation of engine braking based on the operating state of the vehicle, and holds the auxiliary exhaust valve in an open state via the auxiliary exhaust valve drive device during engine braking, and stops the supply of fuel to the combustion chamber. A control device, and an auxiliary exhaust passage closing means for controlling the auxiliary exhaust valve drive device to close the auxiliary exhaust passage with the auxiliary exhaust valve at a time when the intake valve of the engine opens during the engine braking. An engine braking device featuring: