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Title: Closed loop solar collector system powering a self-starting uniflow steam engine

Abstract

A uniform engine is described comprising: (a) a cylinder having a pair of inlet openings respectively located at opposite ends thereof and a central discharge port between the inlet openings; (b) a piston movable within the cylinder and including a drive shaft connected for delivery of power; (c) first and second normally closed poppet inlet valves respectively located to open and close each inlet opening. Each poppet valve is opened upon contact with the piston traveling into an end of stroke position to admit pressurized fluid into one of a pair of cylinder chambers located respectively on opposite ends of the piston, the chamber communicating with a source of pressurized fluid through the first and second valves; and (d) a connecting rod simultaneously engageable with a valve rod of each inlet valve for coordinating opening and closing of each of the first and second valves when pressure of fluid supplied to the engine is below a predetermined pressure level. A detent means is included for retaining the connecting rod means in a stationary position to maintain the first valve open and the second valve closed as the piston travels out of contact with the first valve. The connecting rod meansmore » is movable to close the first valve and open the second valve when the piston contacts the second valve with a force sufficient to overcome the bias of the detent means. The connecting rod means and detent means thereby maintain one of the first or second valves open and the other valve closed when pressure of fluid is below the predetermined level to enable start-up of the engine and operation thereof in a non-expanded piston state.« less

Inventors:
Publication Date:
OSTI Identifier:
6958884
Patent Number(s):
US 4627241
Assignee:
NOV; NOV-85-038109; EDB-87-013878
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 17 Sep 1984
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; SOLAR HEAT ENGINES; DESIGN; OPERATION; SOLAR COLLECTORS; CLOSED-LOOP CONTROL; CYLINDERS; FLUID FLOW; PISTONS; POSITIONING; PRESSURE EFFECTS; PRESSURIZING; SHAFTS; START-UP; VALVES; CONTROL; CONTROL EQUIPMENT; ENGINES; EQUIPMENT; FLOW REGULATORS; HEAT ENGINES; MACHINE PARTS; SOLAR EQUIPMENT; 140909* - Solar Thermal Utilization- Miscellaneous Solar Applications- (1980-); 141000 - Solar Collectors & Concentrators

Citation Formats

Johnston, B W. Closed loop solar collector system powering a self-starting uniflow steam engine. United States: N. p., 1986. Web.
Johnston, B W. Closed loop solar collector system powering a self-starting uniflow steam engine. United States.
Johnston, B W. Tue . "Closed loop solar collector system powering a self-starting uniflow steam engine". United States.
@article{osti_6958884,
title = {Closed loop solar collector system powering a self-starting uniflow steam engine},
author = {Johnston, B W},
abstractNote = {A uniform engine is described comprising: (a) a cylinder having a pair of inlet openings respectively located at opposite ends thereof and a central discharge port between the inlet openings; (b) a piston movable within the cylinder and including a drive shaft connected for delivery of power; (c) first and second normally closed poppet inlet valves respectively located to open and close each inlet opening. Each poppet valve is opened upon contact with the piston traveling into an end of stroke position to admit pressurized fluid into one of a pair of cylinder chambers located respectively on opposite ends of the piston, the chamber communicating with a source of pressurized fluid through the first and second valves; and (d) a connecting rod simultaneously engageable with a valve rod of each inlet valve for coordinating opening and closing of each of the first and second valves when pressure of fluid supplied to the engine is below a predetermined pressure level. A detent means is included for retaining the connecting rod means in a stationary position to maintain the first valve open and the second valve closed as the piston travels out of contact with the first valve. The connecting rod means is movable to close the first valve and open the second valve when the piston contacts the second valve with a force sufficient to overcome the bias of the detent means. The connecting rod means and detent means thereby maintain one of the first or second valves open and the other valve closed when pressure of fluid is below the predetermined level to enable start-up of the engine and operation thereof in a non-expanded piston state.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {12}
}