US3704694A — Internal combustion engine with an air inlet valv…

Claim 1

Independent Claim 390 words

For use in an internal combustion engine, valve mechanism including an air intake valve comprising a valve head and an elongated, hollow, cylindrical, axially shiftable valve stem connected to the head for shifting the latter between open and closed position in response to axial movement of the stem, and a fuel injection valve disposed within said hollow stem, said fuel injection valve comprising: a nozzle head structure mounted in said stem for axial movement relative thereto, said structure being disposed in spaced relationship relative to said valve head in a direction axially of the stem to present a hollow space in the stem between the valve head and the structure, there being at least one fuel injection port in said air intake valve intercommunicating said hollow space and the area surrounding the air intake valve, said nozzle head structure comprising a nozzle head element disposed adjacent said space, a fuel inlet element disposed in axially spaced relationship relative to said head element and means rigidly interconnecting said elements to present a fuel metering chamber having generally fixed dimensions in said stem therebetween, there being at least one injection nozzle passageway extending through said nozzle head element for normally intercommunicating the space and the chamber and a fuel inlet passageway extending from the fuel inlet element and into the chamber; rod means connected to said nozzle head structure for holding the same motionless relative to the stem when the latter is shifted axially; piston means carried by the valve stem and extending into said chamber for reducing the volume of the latter when the valve stem is moved axially relative to the nozzle head structure in a direction to open the air intake valve; and metering valve mechanism including a double acting valve body mounted in said chamber for movement between an injection nozzle passageway closing position and a fuel inlet passageway closing position, there being pressure responsive means on the valve body for moving the latter toward its fuel inlet passageway closing position in response to an increased pressure in said chamber resulting from a reduction of the volume thereof by virtue of the axial movement of the stem in said direction to open the air intake valve, whereby a metered quantity of fuel is discharged through the injection nozzle and said port when the air intake valve is opened.

Claim 2

Dependent Claim 390 words

For use in an internal combustion engine, valve mechanism including an air intake valve comprising a valve head and an elongated, hollow, cylindrical, axially shiftable valve stem connected to the head for shifting the latter between open and closed position in response to axial movement of the stem, and a fuel injection valve disposed within said hollow stem, said fuel injection valve comprising: a nozzle head structure mounted in said stem for axial movement relative thereto, said structure being disposed in spaced relationship relative to said valve head in a direction axially of the stem to present a hollow space in the stem between the valve head and the structure, there being at least one fuel injection port in said air intake valve intercommunicating said hollow space and the area surrounding the air intake valve, said nozzle head structure comprising a nozzle head element disposed adjacent said space, a fuel inlet element disposed in axially spaced relationship relative to said head element and means rigidly interconnecting said elements to present a fuel metering chamber having generally fixed dimensions in said stem therebetween, there being at least one injection nozzle passageway extending through said nozzle head element for normally intercommunicating the space and the chamber and a fuel inlet passageway extending from the fuel inlet element and into the chamber; rod means connected to said nozzle head structure for holding the same motionless relative to the stem when the latter is shifted axially; piston means carried by the valve stem and extending into said chamber for reducing the volume of the latter when the valve stem is moved axially relative to the nozzle head structure in a direction to open the air intake valve; and metering valve mechanism including a double acting valve body mounted in said chamber for movement between an injection nozzle passageway closing position and a fuel inlet passageway closing position, there being pressure responsive means on the valve body for moving the latter toward its fuel inlet passageway closing position in response to an increased pressure in said chamber resulting from a reduction of the volume thereof by virtue of the axial movement of the stem in said direction to open the air intake valve, whereby a metered quantity of fuel is discharged through the injection nozzle and said port when the air intake valve is opened.

Claim 3

Dependent Claim 37 words

Valve mechanism as set forth in claim 1 wherein is included pressure relief means disposed in said chamber and operable for increasing the volume of the latter in response to the development of an excessive pressure therein.

Claim 4

Dependent Claim 23 words

Valve mechanism as set forth in claim 1 wherein said port extends through the wall of the valve stem adjacent said valve head.

Claim 5

Dependent Claim 39 words

Valve mechanism as set forth in claim 3 wherein the surface of the valve head adjacent said port is characterized by a surface formation in the form of twisted edges shaped to cause thorough mixing of air and fuel.

Claim 6

Dependent Claim 34 words

Valve mechanism as set forth in claim 1 wherein said piston means includes a cylindrical piston disposed in surrounding relationship to said fuel inlet element and having an end portion extending into said chamber.

Claim 7

Dependent Claim 37 words

Valve mechanism as set forth in claim 5 wherein said injection nozzle passageway and said fuel inlet passageway are generally axially aligned and said double acting valve body is axially elongated and shiftable in an axial direction.

Claim 8

Dependent Claim 71 words

Valve mechanism as set forth in claim 6 wherein said nozzle head element includes means presenting a central, axially extending recess extending toward and terminating in communication with said injection nozzle passageway, said double acting valve body including an elongated extension received in said recess, said body and said recess being configured to present at least one axially extending fuel channel therebetween normally intercommunicating said injection nozzle passageway and said chamber.

Claim 9

Dependent Claim 53 words

Valve mechanism as set forth in claim 7 wherein is included a plurality of said injection nozzle passageways, the portion of said recess adjacent said passageways being defined by wall means having a conical configuration, said nozzle passageways extending from said adjacent portion of the recess and generally perpendicularly through said wall means.

Claim 10

Dependent Claim 62 words

Valve mechanism as set forth in claim 8 wherein the elongated extension of the double acting valve body is provided with a conically configured terminus which is complemental in shape to said portion of the recess adjacent said nozzle passageways whereby the latter are closed when said conical terminus iS forced against the wall means defining the conical portion of the recess.

Claim 11

Dependent Claim 63 words

Valve mechanism as set forth in claim 7 wherein said double acting valve body includes a portion at the opposite axial end thereof from said extension which is larger in diameter than the latter, said portion including an end element complementally configured to mate with the end of said fuel passageway which opens into the chamber to prevent fuel from entering the chamber.

Claim 12

Dependent Claim 111 words

Valve mechanism as set forth in claim 10 wherein is included means for yieldably biasing said double acting valve body in an axial direction toward the injection nozzle passageway and away from the end of the fuel inlet passageway, said double acting valve body including an annular abutment adjacent said end element thereof, said abutment being disposed generally in a plane perpendicular to the axis of the stem and facing into said chamber to present said pressure responsive means for forcing said valve body toward the end of the fuel passageway against the bias of the yieldable biasing means when the pressure in the chamber is increased beyond a predetermined level.

Claim 13

Dependent Claim 102 words

Valve mechanism as set forth in claim 11 wherein is provided means presenting an enlarged annular space surrounding said recess and communicating with said chamber, there being an annular pressure relief valve element disposed in said annular space in surrounding relationship to said elongated extension and spring means urging said element toward said chamber and into sealed contact with said portion of the valve body, said relief valve element being larger in diameter than said portion and operable to be shifted into the annular space to increase the volume of the chamber when the pressure in the latter exceeds a predetermined level.

Claim 14

Dependent Claim 62 words

Valve means as set forth in claim 1 wherein said engine includes a camshaft mounted for both axial and angular movement and a cam lobe on the camshaft configured to transmit axial movement to a valve stem in operable connection therewith in response to either axial or angular movement of the camshaft, said valve stem being in operable connection with said lobe.

Claim 15

Dependent Claim 41 words

Valve means as set forth in claim 1 wherein said engine includes a distributor shaft, said rod means being connected to the distributor shaft and being held thereby to prevent axial movement of the nozzle head structure with the valve stem.

Claim 16

Dependent Claim 32 words

Valve mechanism as set forth in claim 1 wherein said rod means and said fuel inlet element are interconnected, said rod means having an axial bore therethrough presenting said inlet fuel passageway.

Claim 17

Dependent Claim 16 words

Valve mechanism as set forth in claim 4 wherein said surface comprises helically inclined surface portions.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-12-05	1976-06-05	1976-12-05	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-12-05	1980-06-05	1980-12-05	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-12-05	1984-06-05	1984-12-05	$7700.00	Window Closed / Lapsed

Internal combustion engine with an air inlet valve and a fuel injection valve

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag