US 5,261,797 AGranted

Internal combustion engine/fluid pump combination

OwnerHoward W. Christensoninventor

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Abstract

A two cycle internal combustion engine is disclosed incorporating a spherical joint between the piston and the connecting rod. The spherical joint draws lubricating oil into a clearance volume, wherein the oil is sealed therein to hydrostatically transfer piston loads thereacross as the piston reciprocates. The engine further includes a working pump piston for operating on hydraulic fluid. An accumulator chamber is also provided in combination with the engine, wherein the pressure of the fluid in the accumulator chamber is maintained equal to the working fluid pressure of the engine pump by valve means. Also disclosed is a pulse pressure booster for delivering charged air to the combustion chamber of the engine. The pulse pressure booster receives pressurized sump gas and includes a piston for separating the inlet air from the sump gas while communicating pressures thereacross. Also disclosed is an improved reaction valve in the hydrocycle engine pump, wherein the valve incorporates a spring disk configuration to facilitate faster opening of the reaction valve.

Claims7

Dependent claims

An internal combustion engine, comprising:

a combustion cylinder having a head end and a sump end;
a sump disposed at the sump end of the combustion cylinder;
a pump disposed at the head end of the combustion cylinder, said pump containing a working fluid for discharge therefrom;
a compression piston reciprocatably disposed within said combustion cylinder;
a power piston reciprocatably disposed within said combustion cylinder, said power piston opposing said compression piston and defining a combustion chamber therebetween;
a pumping member attached to said power piston, said pumping member being operably disposed within said pump so that movement of the pumping member displaces working fluid within the pump for discharge;
an accumulator cylinder fluidly connected to the pump;
and
an accumulator piston reciprocatably disposed between said accumulator cylinder and said pump and containing the working fluid therebetween, said accumulator piston further defining an accumulator chamber within said accumulator cylinder for containing pressurized accumulator fluid therein;
wherein said accumulator piston reciprocates within said accumulator cylinder to maintain the pressure of the accumulator fluid contained therein equal to the pressure of the working fluid contained within the pump.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/830,657Filed 4 Feb 1992
Granted: 16 Nov 1993
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F04B 41/04
Pumping installations or systems specially adapted for elastic fluids: conversion of internal-combustion engine cylinder units to pumps
F02B 33/24
Engines with reciprocating-piston pumps; Engines with crankcase pumps: with crankcase pumps other than with reciprocating pistons only
F02B 37/04
Engines characterised by provision of pumps driven at least for part of the time by exhaust: engines with exhaust drive and other drive of pumps,…
F02B 37/105
At least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an…:…