US4062331A — Two cycle internal combustion engine

Claim 1

Independent Claim 268 words

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a skirted piston mounted for reciprocation in the cylinder between top and bottom dead center positions; at least one transfer passage in communication with the crankcase and having an opening through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; a fuel intake chamber for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase, said intake porting including portions configured and positioned to provide for introduction of fuel beneath the piston and into said space independently of the transfer passage throughout the entire upward stroke of the piston, from substantially the bottom dead center position to substantially the top dead center position thereof; reed valve means for controlling the flow of fluid through the intake chamber and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward its bottom dead center position; and injector passage means responsive to the flow of compressed fluid through said transfer passage to draw fluid from the intake chamber and supply it to said transfer passage, and directly to the combustion side of the piston without compression of the latter fluid in the crankcase, said injector passage means having porting communicating with said transfer passage and having other porting communicating with said intake chamber downstream of said reed valve means.

Claim 2

Dependent Claim 268 words

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a skirted piston mounted for reciprocation in the cylinder between top and bottom dead center positions; at least one transfer passage in communication with the crankcase and having an opening through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; a fuel intake chamber for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase, said intake porting including portions configured and positioned to provide for introduction of fuel beneath the piston and into said space independently of the transfer passage throughout the entire upward stroke of the piston, from substantially the bottom dead center position to substantially the top dead center position thereof; reed valve means for controlling the flow of fluid through the intake chamber and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward its bottom dead center position; and injector passage means responsive to the flow of compressed fluid through said transfer passage to draw fluid from the intake chamber and supply it to said transfer passage, and directly to the combustion side of the piston without compression of the latter fluid in the crankcase, said injector passage means having porting communicating with said transfer passage and having other porting communicating with said intake chamber downstream of said reed valve means.

Claim 3

Dependent Claim 22 words

An engine in accordance with claim 1, and in which said injector passage means is also in communication with said intake porting.

Claim 4

Dependent Claim 28 words

An engine in accordance with claim 1 and further characterized in that said injector passage means comprises a generally tubular channel extending in the wall of the cylinder.

Claim 5

Dependent Claim 69 words

An engine in accordance with claim 1, and further characterized in that said injector passage means comprises, at least in major part, a cavity recessed in the cylinder wall and openly confronting outside surface portions of the piston when the latter is in the region of its bottom dead center position, whereby the recessed cylinder wall and said surface portions of said piston together define said injector passage means.

Claim 6

Dependent Claim 57 words

An engine in accordance with claim 1, and further characterized by the inclusion of a pair of transfer passages spaced substantially diametrically of the cylinder, and in which said injector passage means comprises a pair of injector passages, the porting of the passages of said latter pair respectively communicating with a corresponding one of said transfer passages.

Claim 7

Dependent Claim 42 words

An engine in accordance with claim 4, and in which said portions of said intake porting are in open communication with the cavity of said injector passage means and comprise, at least in major part, an extension of the injector passage cavity.

Claim 8

Dependent Claim 59 words

An engine in accordance with claim 6, and further including means for promoting mixing of fuel derived from said crankcase and from said fuel intake chamber, said last means comprising an opening through the cylinder wall, adjacent the mentioned transfer passage opening, and being in free communication with said transfer passage, said injector passage means, and said intake porting.

Claim 9

Dependent Claim 32 words

An engine according to claim 7, and in which said adjacent opening and said transfer passage opening are augularly spaced from said injector passage means, in a plane transverse the cylinder axis.

Claim 10

Dependent Claim 58 words

An engine according to claim 1, and further including auxiliary inlet-transfer porting in communication with said intake porting and having a fuel supply opening through the cylinder wall adjacent the transfer passage opening, the opening of said transfer passage and said auxiliary inlet-transfer porting being augularly spaced from said intake porting, in a plane transverse the cylinder axis.

Claim 11

Dependent Claim 259 words

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing wall structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; a pair of generally opposed transfer passages each in communication with the crankcase and each having an opening through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; fuel intake means for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver, beneath the piston and into the crankcase, fuel received from said source, said intake porting providing for such delivery of fuel independently of the transfer passages throughout the entire upward stroke of the piston, from substantially the bottom dead center position thereof to substantially the top dead center position thereof; reed valve means for controlling flow of fluid through the intake means and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward its bottom dead center position; and injector passage means responsive to the flow of fluid through said transfer passages, to draw fluid from the intake means and supply such fluid to said transfer passages and thence directly to the combustion side of the piston without compression in the crankcase, said injector passage means having porting communicating with each of said transfer passages and other porting communicating with said intake means downstream of said reed valve means.

Claim 12

Dependent Claim 259 words

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing wall structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; a pair of generally opposed transfer passages each in communication with the crankcase and each having an opening through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; fuel intake means for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver, beneath the piston and into the crankcase, fuel received from said source, said intake porting providing for such delivery of fuel independently of the transfer passages throughout the entire upward stroke of the piston, from substantially the bottom dead center position thereof to substantially the top dead center position thereof; reed valve means for controlling flow of fluid through the intake means and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward its bottom dead center position; and injector passage means responsive to the flow of fluid through said transfer passages, to draw fluid from the intake means and supply such fluid to said transfer passages and thence directly to the combustion side of the piston without compression in the crankcase, said injector passage means having porting communicating with each of said transfer passages and other porting communicating with said intake means downstream of said reed valve means.

Claim 13

Dependent Claim 38 words

An engine in accordance with claim 10, and in which said intake porting includes a portion opening through said structure wall of the cylinder and a portion opening through said wall structure of the crankcase adjacent the cylinder.

Claim 14

Dependent Claim 31 words

An engine in accordance with claim 10, and further characterized in that said injector passage means comprises a pair of generally tubular channels extending in the wall structure of the cylinder.

Claim 15

Dependent Claim 66 words

An engine in accordance with claim 10, and further characterized in that said injector passage means comprises, at least in major part, cavities formed in the housing wall structure and openly confronting outside surface portions of the piston, when the latter is in its bottom dead center position, whereby the recessed cylinder wall and said surface portions of the piston together define said injector passage means.

Claim 16

Dependent Claim 27 words

An engine in accordance with claim 10, and in which at least portions of said intake porting communicate with, and comprise a part of, said injector porting.

Claim 17

Dependent Claim 28 words

An engine in accordance with claim 13, and further characterized in that portions of said intake porting comprise extensions of the cavities which comprise said injector passage means.

Claim 18

Dependent Claim 66 words

An engine in accordance with claim 15, and further including means for promoting smooth mixing of fuel derived from said fuel intake means and from said crankcase, said last means comprising provision, adjacent each transfer passage, of an opening through the cylinder wall, adjacent each transfer passage opening, and being in free communication with said transfer passage opening, said injector passage means, and said intake porting.

Claim 19

Dependent Claim 29 words

An engine according to claim 16, in which said openings, adjacent said transfer passage openings, are augularly spaced from said intake porting, in a plane transverse the cylinder axis.

Claim 20

Dependent Claim 240 words

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a skirted piston mounted for reciprocation in the cylinder between top and bottom dead center positions; at least one transfer passage in communication with the crankcase and having an opening through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; a fuel intake chamber for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase, said intake porting including portions configured and positioned to provide for introduction of fuel beneath the piston and into said space throughout the entire upward stroke of the piston, from the bottom dead center position to the top dead center position thereof; reed valve means for controlling the flow of fluid through the intake chamber and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward is bottom dead center position; and auxiliary inlet-transfer porting in communication with said intake porting and having a fuel supply opening through the cylinder wall adjacent the transfer passage opening, said openings of said transfer passage and said auxiliary inlet-transfer porting being adjacent, and angularly spaced from said intake porting in a plane transverse the cylinder axis.

Claim 21

Dependent Claim 240 words

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a skirted piston mounted for reciprocation in the cylinder between top and bottom dead center positions; at least one transfer passage in communication with the crankcase and having an opening through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; a fuel intake chamber for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel to the space below the piston including the crankcase, said intake porting including portions configured and positioned to provide for introduction of fuel beneath the piston and into said space throughout the entire upward stroke of the piston, from the bottom dead center position to the top dead center position thereof; reed valve means for controlling the flow of fluid through the intake chamber and substantially preventing flow of fluid back toward such supply source during downward movement of the piston toward is bottom dead center position; and auxiliary inlet-transfer porting in communication with said intake porting and having a fuel supply opening through the cylinder wall adjacent the transfer passage opening, said openings of said transfer passage and said auxiliary inlet-transfer porting being adjacent, and angularly spaced from said intake porting in a plane transverse the cylinder axis.

Claim 22

Dependent Claim 208 words

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; at least one transfer passage in communication with the crankcase and having an opening through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; a fuel intake chamber for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel beneath the piston; and reed valve means for controlling the flow of fluid through the intake chamber substantially radially of the cylinder, said reed valve means being aligned with said intake porting and, together with said intake porting, confronting the side of said piston when the latter is in its bottom dead center position, said intake porting having a dimension, in the direction of the axis of the cylinder, substantially equal to the length of the piston stroke, whereby fuel from said intake porting is delivered beneath the piston throughout the upward stroke of the latter, from its bottom dead center position to its top dead center position.

Claim 23

Dependent Claim 208 words

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: engine housing structure including a cylinder and a crankcase, a piston mounted for reciprocation in the cylinder between top and bottom dead center positions; at least one transfer passage in communication with the crankcase and having an opening through the cylinder wall for supplying, to the combustion side of the piston, fluid compressed in the crankcase during movement of the piston toward its bottom dead center position; a fuel intake chamber for receiving fuel from a supply source, and having intake porting in the housing structure positioned to deliver fuel beneath the piston; and reed valve means for controlling the flow of fluid through the intake chamber substantially radially of the cylinder, said reed valve means being aligned with said intake porting and, together with said intake porting, confronting the side of said piston when the latter is in its bottom dead center position, said intake porting having a dimension, in the direction of the axis of the cylinder, substantially equal to the length of the piston stroke, whereby fuel from said intake porting is delivered beneath the piston throughout the upward stroke of the latter, from its bottom dead center position to its top dead center position.

Claim 24

Dependent Claim 25 words

An engine in accordance with claim 19 in which the mentioned dimension of said intake porting is greater than the length of the piston stroke.

Claim 25

Dependent Claim 35 words

An engine in accordance with claim 19 in which the upper edge of the intake port is located at the upper edge of the piston when the piston is in the bottom dead center position.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1980-12-12	1981-06-13	1981-12-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1984-12-12	1985-06-13	1985-12-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1988-12-12	1989-06-13	1989-12-13	$7700.00	Window Closed / Lapsed

Two cycle internal combustion engine

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