JPS5867946U

JPS5867946U - piston device

Info

Publication number: JPS5867946U
Application number: JP16255381U
Authority: JP
Inventors: 敬治岸下
Original assignee: いすゞ自動車株式会社
Priority date: 1981-10-30
Filing date: 1981-10-30
Publication date: 1983-05-09
Also published as: JPS636432Y2

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]

図面は本案実施例の要部断面図である。１・・・シリンダブロック、２・・・シリンダボア、３
・・・、シリンダライナ、４・・・下向き環状段部、５
・・・上部小径内周部、６・・・下部大径内周部、７・
・・ピストン、８・・・上向き環状段部、９・・・上部
小径部、１０・・・下部大径部、１１・・・環状溝、１
２・・・ラビリンスシールリング、１３・・・ピストン
燃焼室部、１４・・・環状圧力室、１５・・・環状溝、
１６・・・シリンダヘッド、１７・・・吸気路、１８・
・・通路、１９・・・燃焼室、２０・・・環状間隙、２
１・・・吸気弁、２２・・・排気弁、２３・・・ピスト
ンピン、２４・・・コンロッド、２５・・・クランク軸
、２６−・・クランクケース。The drawing is a sectional view of a main part of the embodiment of the present invention. 1... Cylinder block, 2... Cylinder bore, 3
..., cylinder liner, 4...downward annular step, 5
... Upper small diameter inner peripheral part, 6... Lower large diameter inner peripheral part, 7.
...Piston, 8...Upward annular step, 9...Upper small diameter part, 10...Lower large diameter part, 11...Annular groove, 1
2... Labyrinth seal ring, 13... Piston combustion chamber part, 14... Annular pressure chamber, 15... Annular groove,
16... Cylinder head, 17... Intake path, 18...
... Passage, 19... Combustion chamber, 20... Annular gap, 2
DESCRIPTION OF SYMBOLS 1... Intake valve, 22... Exhaust valve, 23... Piston pin, 24... Connecting rod, 25... Crankshaft, 26-... Crank case.

Claims

[Scope of utility model registration request]

The upper inner circumferential surface of the downward annular step formed on the cylinder liner is formed on the upper small diameter inner circumference, the lower inner circumferential surface is formed on the lower large diameter inner circumference, and the upward annular step is formed on the outer periphery of the piston. The upper part of the cylinder liner is formed with an upper small diameter part and the lower part is formed with a lower large diameter part, the upper small diameter part of the piston is formed in the upper small diameter inner periphery of the cylinder liner, and the lower large diameter part is formed in the lower large diameter inner periphery of the cylinder liner. are slidably fitted into the cylinder liner's downward annular stepped portion and the lower large diameter inner peripheral portion;
An annular pressure chamber having a compression ratio higher than that of the combustion chamber can be formed by the upper small diameter portion and the upward annular step of the piston, and furthermore, the annular pressure chamber faces the annular pressure chamber near the bottom dead center of the piston and is connected to the outside air. A piston device comprising a communication port provided in a lower large-diameter inner peripheral portion of the cylinder liner.