JPS62190834U

JPS62190834U -

Info

Publication number: JPS62190834U
Application number: JP7893686U
Authority: JP
Priority date: 1986-05-26
Filing date: 1986-05-26
Publication date: 1987-12-04

Description

[Brief explanation of the drawing]

第１図は本願考案の一実施例を示すダツシユポ
ツトの縦断面図、第２図は第１図の要部詳細図、
第３図は燃料噴射量の増加と時間との関係を示し
た特性線図である。１……ハウジング、２……カバー、５……隔片
、６……第１のダイヤフラム、９……第２のダイ
ヤフラム、１０……第１の作動室、１３……第２
の作動室、１６……プツシユロツド、２２……ピ
ストン、２３……第１の戻しばね、２５……逃し
弁、２７……弁体、３５……オリフイス、３７…
…第２の戻しばね。 FIG. 1 is a vertical sectional view of a dart pot showing an embodiment of the present invention, FIG. 2 is a detailed view of the main parts of FIG. 1,
FIG. 3 is a characteristic diagram showing the relationship between increase in fuel injection amount and time. DESCRIPTION OF SYMBOLS 1... Housing, 2... Cover, 5... Partition, 6... First diaphragm, 9... Second diaphragm, 10... First working chamber, 13... Second
working chamber, 16... push rod, 22... piston, 23... first return spring, 25... relief valve, 27... valve body, 35... orifice, 37...
...Second return spring.

Claims

[Scope of utility model registration request]

a housing having a cylindrical stay at the bottom;
a disc-shaped partition disposed between the housing and the cover fixed to the upper end thereof, and having a bottomed inner hole opening at the lower end surface and an orifice communicating the lower end surface and the upper end surface; The first working chamber is disposed between the lower end surface of the partition and the bottom of the housing, and has a substantially sealed first working chamber formed between the lower end surface and the inner surface of the housing. The diaphragm is arranged between the upper end surface of the partition and the cover, with a substantially sealed second working chamber between the upper end surface and a second atmospheric chamber between the inner surface of the cover and the upper end surface of the partition. a second diaphragm forming a diaphragm, a push rod having one end fixed to the lower surface of the first diaphragm and the other end protruding through the stay; , a check valve that blocks communication from the first working chamber to the second working chamber via the inner hole;
a piston slidably fitted into the inner hole and biased toward the first diaphragm by a first return spring disposed between the inner hole and the bottom surface of the inner hole; A relief valve provided on the partition so as to open and close a passage connecting the first working chamber and the second working chamber, and a second diaphragm provided in the second atmospheric chamber on the upper end surface of the partition. A second return spring is provided which biases the hydraulic fluid in the first working chamber toward the orifice until the upward displacement of the push rod reaches a predetermined amount, and from the orifice and the relief valve after the push rod has been displaced by a predetermined amount. A dumppot for a fuel injection pump, characterized in that the injection pot is configured to flow into a second working chamber.