GB2554458A - Improvement to manson engine - Google Patents

Improvement to manson engine Download PDF

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Publication number
GB2554458A
GB2554458A GB1616550.8A GB201616550A GB2554458A GB 2554458 A GB2554458 A GB 2554458A GB 201616550 A GB201616550 A GB 201616550A GB 2554458 A GB2554458 A GB 2554458A
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GB
United Kingdom
Prior art keywords
piston
engine
manson
dead centre
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1616550.8A
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GB201616550D0 (en
Inventor
Guise Christopher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kontax Eng Ltd
Original Assignee
Kontax Eng Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kontax Eng Ltd filed Critical Kontax Eng Ltd
Priority to GB1616550.8A priority Critical patent/GB2554458A/en
Publication of GB201616550D0 publication Critical patent/GB201616550D0/en
Publication of GB2554458A publication Critical patent/GB2554458A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00—Hot gas positive-displacement engine plants
    • F02G1/02—Hot gas positive-displacement engine plants of open-cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2270/00—Constructional features
    • F02G2270/40—Piston assemblies

Abstract

A Manson engine may comprise a displacer piston 6 directly connected to power piston 8, a flywheel 1, a connecting rod 2 connecting the flywheel to the power piston with connecting rod pins 3. The power piston and displacer piston are contained in a cylinder which has a hot side 5 and cold side 4. A top dead centre valve 9 and bottom dead centre valve 10 take the form of grooves or slots in the skirt of the power piston. The channels 9 and 10 allow pressure to be released and a vacuum to be filled during the engines cycle. The channels are located on opposite sides of the piston and may be offset in the longitudinal axis of the piston. There are no corresponding ports or passageways in the cylinder. The engine operates from any sufficient temperature difference between the hot and cold sides of the engine.

Description

(54) Title of the Invention: Improvement to manson engine
Abstract Title: Manson hot air engine having slot piston valves (57) A Manson engine may comprise a displacer piston 6 directly connected to power piston 8, a flywheel 1, a connecting rod 2 connecting the flywheel to the power piston with connecting rod pins 3. The power piston and displacer piston are contained in a cylinder which has a hot side 5 and cold side 4. Atop dead centre valve 9 and bottom dead centre valve 10 take the form of grooves or slots in the skirt of the power piston. The channels 9 and 10 allow pressure to be released and a vacuum to be filled during the engines cycle. The channels are located on opposite sides of the piston and may be offset in the longitudinal axis of the piston. There are no corresponding ports or passageways in the cylinder. The engine operates from any sufficient temperature difference between the hot and cold sides of the engine.
Figure GB2554458A_D0001
1/1
Figure GB2554458A_D0002
Figure 2
Description
This invention relates to an improvement to Manson engine.
Hot air engines are available in several variants and typical known by the inventors name e.g. Stirling engine. The present invention deals with hot gas engines of the Manson type engine. These were first described by A.D. Manson in a magazine called Newnes Practical Mechanics in March 1952 and have been known as Manson engines ever since.
Manson type engines work as follows. A piston is guided in a cylinder, which forms a working chamber within the cylinder. This workspace typically contains air or various gases. In the first region of the cylinder, the air is heated from outside and in a second region, the air is cooled from the outside, therefore the engine has a hot and cold side. The displacer is a component within the cylinder and is connected to the piston and moves at the same time as the piston. The displacer does not touch the cylinder wall and is only used to direct the flow of the air within the cylinder.
The displacer's function is to move the air between the hot and cold sides. A flywheel is used to control the piston and displacer stroke and is connected to them by means of a connecting rod.
To operate the engine, the hot side is heated and the flywheel turned. It should be pointed out that the flywheel can turn in either direction for the engine to operate. One rotation is one cycle of the engine.
Assuming the piston and displacer is started at top dead centre, the air inside is on the cold side of the engine. Once the flywheel is rotated the displacer moves the air to the hot side of the engine and the heated air increases the pressure within the engine. While the displacer is moving the air, pressure is forcing the piston to its maximum travel: the bottom dead centre. Once the piston reaches bottom dead centre, a valve opens which allows pressure compensation between the pressure in the working cylinder and the ambient pressure.
The kinetic energy in the flywheel at this point switches the piston and displacer to move in the opposite direction. The valve then closes and the air inside starts to be moved from the hot side to the cold side. The cooled air reduces the pressure within the engine creating a vacuum. While the displacer is moving the air, the vacuum is forcing the piston to the top dead centre. Once the piston reaches top dead centre, a valve opens which allows pressure compensation between the pressure in the working cylinder and the ambient pressure. The kinetic energy in the flywheel now switches the piston and displacer to move in the opposite direction. Allowing the cycle to repeat.
The piston therefore has two power strokes, one when the air is being heated and one when the air is being cooled. The engine operates from any sufficient temperature difference between the hot and cold sides of the engine.
The valve arrangements on Manson engines have valves consisting of holes and slots in the piston, cylinder and often the displacer. This makes it an overly complex design which increases costs. It also means the air has a convoluted passage reducing performance.
In this new design the piston 8 has two slots that form two valves, a top dead centre valve 10 and a bottom dead centre valve 11. This means that Cylinder 4 has a simpler design by not having holes or slots. It also means the airs passage through the valves 10 and 11 are straighter and shorter, thereby improving engine efficiency.
Figure 1 Shows the engine in bottom dead centre position
Figure 2 Shows the engine in top dead centre position
In figure 1, a flywheel 1 is connected to the piston 8 by a connecting rod 2. The connecting rod is attached to flywheel 1 and piston 8 by connecting rod pins 3 which have bearings 13 around them. The piston 8 is guided by the cylinder 4. The displacer 6 is connected to piston 8 and they move together. The displacer 6 does not touch the cylinder wall on the hot side of the cylinder 5, hence leaving an air gap 7. The displacer shuttles air between cylinder cold section 4 and the cylinder hot section 5. The flywheel wheel 1 is held in place and connected to the rest through bearings 12 which are housed in the engine casing 11. The engine casing 11 is connected to the cylinder 4. In figure 1 the engine is shown in bottom dead centre position, which at this point the bottom dead centre valve 10 is open. In figure 2 the engine is shown in top dead centre position, which at this point the top dead centre valve 9 is open.
List of part numbers
Flywheel
Connecting rod
Connecting rod pin
Cylinder (cold side)
Cylinder (hot side)
Displacer
Air gap around displacer
Piston
Top dead centre valve
Bottom dead centre valve
Engine casing
Bearings

Claims (5)

Claims
1 An engine based on the Manson style engine where the valves are entirely incorporated into the piston 8 design.
2 An engine based on the Manson style engine according to claim 1, in which one valve is opened at top dead centre and the other valve is open at bottom dead centre.
3 An engine based on the Manson style engine according to claim 1, in which one or more of the valves are slots of any shape on the periphery of the piston and conform to claim 2.
4 An engine based on the Manson style engine according to claim 1, in which one or more of the valves are ports going through the piston and conform to claim 2.
5 An engine based on the Manson style engine according to claim 1, 2, 3 and 4 in which the working gas maybe air or any other type gas.
Intellectual
Property
Office
Application No: GB1616550.8
GB1616550.8A 2016-09-29 2016-09-29 Improvement to manson engine Withdrawn GB2554458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1616550.8A GB2554458A (en) 2016-09-29 2016-09-29 Improvement to manson engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1616550.8A GB2554458A (en) 2016-09-29 2016-09-29 Improvement to manson engine

Publications (2)

Publication Number Publication Date
GB201616550D0 GB201616550D0 (en) 2016-11-16
GB2554458A true GB2554458A (en) 2018-04-04

Family

ID=57571115

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1616550.8A Withdrawn GB2554458A (en) 2016-09-29 2016-09-29 Improvement to manson engine

Country Status (1)

Country Link
GB (1) GB2554458A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018206412A1 (en) 2017-05-09 2018-11-15 Frauscher Holding Gmbh Hot gas engine having a step piston

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19904269A1 (en) * 1999-02-03 2000-11-09 Michael Ruppel Heat engine has a simplified design with combined piston and valve and with alternate sides of the piston vented in either limits of the piston movement
WO2014012586A1 (en) * 2012-07-18 2014-01-23 Glushenkov Maxim Heat to mechanical energy converter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19904269A1 (en) * 1999-02-03 2000-11-09 Michael Ruppel Heat engine has a simplified design with combined piston and valve and with alternate sides of the piston vented in either limits of the piston movement
WO2014012586A1 (en) * 2012-07-18 2014-01-23 Glushenkov Maxim Heat to mechanical energy converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018206412A1 (en) 2017-05-09 2018-11-15 Frauscher Holding Gmbh Hot gas engine having a step piston
US11215139B2 (en) 2017-05-09 2022-01-04 Frauscher Holding Gmbh Hot gas engine having a step piston
US11725607B2 (en) 2017-05-09 2023-08-15 Frauscher Holding Gmbh Hot air engine having a step piston
EP4273393A2 (en) 2017-05-09 2023-11-08 Frauscher Holding GmbH Hot gas engine having a step piston

Also Published As

Publication number Publication date
GB201616550D0 (en) 2016-11-16

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