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Патент USA US2409762

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Oct. 22, 1946.
K. L. HuLslNG
2,409,761
SLEEVE VALVE ENGINE
` Filed Feb; 24, 1945
2 Sheets-Sheet 2
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Patented Oct. 22, 1946
2,409,761
PATENT oFFIcE
UNITED
l
2,409,761
sLEnvtg; VALVE ENGINE
Kenneth L. Hulsing, Plymouth, Mich., assigner to
General Motors Corñoratiortllîeti'oit, Mich., a
> corporation of Delaware
Application February 24. i945, serial,
11 Claims.
579.601
(Cl. 123H65‘)
l
2v `
In two cycle sleeve valve engines it is desirable
35 are ci" lesser eccentrici'ty from the axis of the
to delay the opening of theïintake valves as long
crankshaft and are angùlarly displaced relative
thereto. It will beV seen, therefore, `that the ‘op
erative mec_hanisrn>` for the sleeve is much simpler
as possible i-n order to lgive ample time for the
burned gases to escape, and, after scavenging; to
hasten the closure of the intake valves in order
to trapl and` compress as great a volume of‘gas as
than that of the above> mentioned patent.` "
possiblei This Consideration necessarily requires
a lessening of the part of the crankshaft rotation
the sleevel Theseregister at _ti-Ines with'the cyl
inder exhaust p_orts 2| >to 'permit the _discharge of
during which the valves are open for scavenging
and recharging. In the patent to Kirtland and
burned gases in the usual rway. From Fig. `4` and
Fig. 5 Vit will be seen that the _movement of 4the
Hulsing for Sleeve v_alye engines, 253625709, dated
November; 14, 194.4, that yobiettive was quite sat.
sleeve causes "the exhaust port registration _to
begin at about; 100° of crankshaft rotationïfrom
pistontop dead center
that upon 'the return
isfactorily attained by the use of a Certain `Sleeve i
valve port arrangement associated: with a special
kind of sleeve valve reciprocating mechanism.
movement the exhaust“ opening 'is' closed
15
fìed sleeve valve;Í port arrangement `_is associated
with a simpler sleeveîvalve reciprocating arrange
ment. By' this new arrangement the piston and
the sleeve port arrangement provides a large
Opening through the. Sleeve lfor a Short period. S0
20
25
t0 the accompanying. drawings. in. which:
Fig. 1 is a vertical section through the cylinder, e
.30
the sleeve valve and the piston.
Fig. 2 is a similar Viewz the parts being shown
L
the connecting rods fcfarftheA piston and valve
'
'
.
.
I
`
35
`
_sleeve `>@primary'row of openings'marked 4_1; asecond row oi openings 4_3 aboventhe openings 4j
POW Of bijenwas .41 lìelow Wellnes,` 4! 'and' Sepa
rated by a land 49.
i
`
_
The sleeve crankpin 35 is substantially 16°
ahead of the Piston branko@ .I3 as indifäaied 01.1
Fig. 4. The _dimensions are, _s_‘o chosen and the
sleeve ports so located that the registration of
sorts murs as indicated. by
.5. tcp-which, liefe
erence now made to explain the operation~` 'ri‘he
@eures indîçate ihe'degï‘ees Of rotation .from .Zero
with' Cylinder inlet 12S.. but 'Witheet effe@ been@
alll three sleeve inlet ports arefcovered by the pis
ton. At the`1_25°`position the exhaustports are
upper dead> center _being marked 0°. `
Fig. 5 is a diagram showing the relatiye _posi
tions of the moving sleeve andpistomand each
exhaust port 31 is ‘about _tp register with vthe cyl
inder _exhaust port __?_L At' the same time inlet
isleeve port 4T and a portion of port 4_1’ register
Fïg- ‘l is a diagram t@ show the vali/.e 'timing
in terms of `crankshaft angles of rotation, piston
40
relative to the cylinder _ports corresponding to
the several stages offc‘rankshait rotation. '
about
_ ‘
assumingÍ zero to be the positionl of top dead i.cen
,
Fig. 3 is a" detail, showing the crankshait with
sleeve in section.
' ‘
and," separated therefrom bye, landß, anda third
that scavenging and recharging are. faßilitated.
The invention will be explained by reierenèß.
in changed positions._
.'¿271/2"a of crankshaft rotation.
To admit the incoming Agas 'into the cylinder
chamberthrough its intake ports there is a de
parture from the two parallel rows o_f_ sleeve _open
irl'gsV of thepatent referred to. I` provide in the
In accordance» with the present invention a I_nodi
sleeve valve cooperate -to control the admission
of gas'or air supercharged, if desired, through
the cylinderinlet port but. the operation of the
sleeve valve is much simpler‘and the change»- in
’ "
À row o_f exhaust valve ports 31 is formed` in
‘
nearly’in registration; The piston has moved be
low the" tipwof cylinder in'let"23 'and is aboutßto
rende'rf port’dl effective. HoweverfLtheland 45
issupplementingï the _piston in keeping the pas
On the drawings,l numeral IlV is used to _mark
sage 23 Vclose`d"a__nd only when’the 125° position is
the crankshaft. By means oí a» ,crankpin I3 its
rotation reciprocatesfa piston I5 by the use :oi a 45 passed isport 23'opened. It is'then opened ‘rap
`idlybecause the piston'moves to ren_der'"port _4l
conventional connecting rod Il. The piston re
ei’fective and the land moves tolopen the passage
ciprocates in a cylinder i9 having, near its upper
end, a row of exhaust ports 2| and, adjacent its
lower end, a row of inlet ports 1_3. 1nto the top
of the cylinder is ñtted a closure 25 carrying the
conventional fuel injector 21. A sleeve valve 29
slides between the cylinder wall and the piston.
The sleeve is reciprocated by connecting `rods 3|
connected to the sleeve at m33 and mountedA on
crankpins 315 one on either side> of pini-3iÍ `Pins 55
_through ¿13.4 It 'will be seen that the sleeve inlet
.portswchange'but little relative' to 'thecylinder
inlet'as‘thecraijikshaft turns hfroin‘its> »1259 _posi
tion to its l200" position. vThis is for' the reason
that the sleeve, being- in advance'of the pistonin
its cycle, goes through fits lower dead- center ñ'r'st.
In this range portsY 43 and_\`4| 'first open substan
tially simultaneously and as the4 piston 'passes
2,409,761
3
4
through its bottom dead center, 180° on the dia
gram, it opens the lower sleeve port 41 partly
because the piston is reaching its lowermost posi
tion and partly because the sleeve, being ahead
of said primary row being longer than those of
the secondary rows.
4. The invention deñned by claim 2, said sec
of the piston, has begun its return movement. It
will be seen that throughout this range, 125° to
side of the primary row and a second row on the
ondary rows of ports including a ñrst row on one
other side of the primary row, the movements
of the piston and sleeve being such that the pri
200°, the exhaust port is almost wide open so
mary row registers with the cylinder port while
that, coinciding with the large inlet opening, there
is a free scavenging of burned gases and a free
still covered by the piston and the land between
recharging of the cylinder with air from the 10 the primary row and said first secondary row
moves to permit said first Isecondary row to reg
supercharger, if one is used. Upon the return
ister with the cylinder port as the piston uncov
movement the land 45 reaches the top of cylinder
port 23 at about 200° so that port 43 becomes in
ers the primary row in moving toward lower
effective. At 2271/2" the exhaust port closes com
dead center and the land between the primary
pletely and Very shortly thereafter at 2321/2a the 15 row and the said secondary row closes the pas
piston closes inlet port 41 and the land 49 closes
sage to the cylinder from the cylinder inlet before
the passage through port 4I so that the inlet is
the piston reaches a position opposite the end
completely closed. After 2321/2" therefore the con
of the cylinder inlet as the piston moves from
tents of the cylinder are trapped and compressed
lower dead center.
for the remainder of the compression stroke. If 20
5. In an internal combustion engine having a
this diagram be compared with that of the patent
cylinder, a piston, a sleeve valve therebetween, a
referred to it will be'seen that the results are
crankshaft having unequally eccentric and an
substantially the same. It will be seen that the
gular related throws, connecting rods between
far simpler operative mechanism for the sleeve
said throws and said piston and said sleeve re
and piston is effective to get this delayed inlet 25 spectively, exhaust ports in said cylinder wall
port opening and accelerated closure because of
and sleeve, said ports adapted to register in re
the new port arrangement. The quick opening
sponse to sleeve movement, intake port means in
-ol’ ports 4| and 43 by resort to the land 45 is
said cylinder wall, a primary intake port in said
similar to that shown by Fig. 3 of the patent.
sleeve adapted to register with the cylinder in
However, the added opening 41 becomes effective 30 let in response to movement of said sleeve, the
adjacent piston lower dead center position and
relative movements of the sleeve and piston be
the land 49 enables the inlet 23 to close com
ing such that only after the registration of the
pletely before being passed by the piston as seen
said inlet ports does piston move to uncover said
in the diagram at 2321/2". In other words. land
primary sleeve inlet port, second port means in
45 delays the inlet opening and land 49 ac 35
said sleeve adapted to register with the cylin
celerates the inlet closure while theport 41 gives
der inlet substantially simultaneously with the
an added area to the inlet opening in the region
opening of the primary port by the piston where
of piston lower dead center. It will therefore be
by an enlarged opening to inlet gases is provid
understood that a relatively large inlet opening is
provided. Also by the use of the lands associated 40 ed, there being a land between said primary and
second port means to delay the time of opening
with the piston the range through which the
of said primary and 'second ports, third port
large opening is effective is yreduced more than
means in said sleeve adapted to register with the
would be possible by merely controlling a continu
cylinder inlet and to be rendered effective by the
ous sleeve inlet port by piston movement.
piston near its position of bottom dead center,
Iclaim:
1. In an engine having a cylinder, a piston and
a sleeve valve, means to reciprocate said piston
and sleeve,- said cylinder having inlet port means
and said sleeve having an inlet port means di
vided by axially spaced lands, one of said lands
operable jointly with the piston to delay regis
tration of said port means and another of said
lands operable jointly with said piston to ac
celerate the closure of the passage through the
cylinder inlet port means.
2. In an internal combustion engine having a
crankshaft, a cylinder, a piston, a sleeve valve
between said cylinder and piston. means con
there being a second land between said primary
port and third port, said second land adapted to
close the passage from the cylinder inlet before
the piston moves suliieiently to close said pas
sage.
6. The invention defined by claim 5, said pri
mary port means being longer than said second
and longer than said third port means.
7. The invention defined by claim 5, said sec
ond and said third port means being on opposite
sides of said primary port means.
8. In an internal combustion engine having a
cylinder with spaced inlet and exhaust port
nected to said crankshaft to reciprocate said pis
means, a piston reciprocable therein, a sleeve re
ton and said sleeve in out of phase relationship, 60 ciprocable between said piston and cylinder,
said cylinder and sleeve having cooperating ex
means to reciprocate said piston and sleeve in
haust ports adapted to register, said cylinder hav
out of phase relationship, said sleeve having ex
ing a circumferential row of inlet ports, said sleeve
haust port means to register with the cylinder
valve having a primary row of circumferentially
exhaust port means, said sleeve having primary
arranged inlet ports and ñrst and second second
inlet ports adapted to register with the cylinder
ary rows of circumferentially arranged inlet ports
inlet port means, but to be rendered effective
with lands between said primary row and each of
only by the movement of the piston over said
said secondary rows. one of said lands» operable
primary ports, second inlet port means in said
jointly with the piston to delay the registration of
sleeve adapted to register with the cylinder inlet
the inlet ports and another of said lands‘operable 70 port means substantially simultaneously with
jointly with the piston to cut off said inlet port
the movement of the piston over the primary
registration before closure by the piston whereby
ports, a land between said primary and second
large port registration may be secured during a
port means to delay the opening of said second
small arc of crankshaft rotation.
ports, third sleeve ports, a second land between
' 3. The invention defined by claim 2, the ports 75 said third ports and primary ports whereby said
v 2,409,761
5
third ports may add to the area of admission ad
jacent lower dead center and whereby said last
named second land may accelerate the time of
6
said cylinder port means and to accelerate the
time of closing of said passage, said other means
including other ports in said sleeve on opposite
sides of said primary ports and lands between
said other ports and said primary ports.
11. In an internal combustion engine having
a cylinder, a piston, a sleeve therebetween, means
to reciprocate said sleeve and piston in out of
closing the admission from the cylinder inlet.
9. In an internal combustion engine having a
cylinder, a piston, a sleeve therebetween, means
to reciprocate said sleeve and piston in out of
phase relationship, exhaust ports in said cylin
der and sleeve adapted to register, inlet port
phase relationship, exhaust ports in said cylin
means in said cylinder, primary ports in said 10 der and sleeve adapted to register, inlet port
sleeve adapted ñrst to register with said cylinder
means in said cylinder, primary ports inV said
inlet port means and then to be renderedveffec
sleeve adapted ñrst to register with said cylin
tive by the movement of the piston over said pri
der inlet port means and then to be rendered ei
mary ports and other means in said sleeve oper
fective by the movement of the piston over said
able to add to the area through which gas isv ad 15 primary ports and other means in said sleeve op
mitted from the cylinder inlet port means, to
erable. to add to the area through which gas is
retard the time of admission through said cyln
admitted from the cylinder inlet port means, to
inder port means and to accelerate the time of
retard the time of admission through said cylin
closing of said passage.
der port means and to accelerate the time of cles
10. In an internal combustion engine having 20 ing cf said passage, said other means including
a cylinder, a piston, a sleeve therebetween, means
other ports in said sleeve on opposite sides of said
to reciprocate said sleeve and piston in out of
primary ports and lands between said other ports
phase relationship, exhaust ports in said cyl
and said primary ports, said other ports serving
inder and sleeve adapted to register, inlet port
to add to the inlet area, the lands between pri
means in said cylinder, primary ports in said 25 mary ports and one of the other ports acting to
sleeve adapted ñrst to register with said cylin
retard the time of admission and the land be
der inlet port means and then to be rendered
tween the primary port and another of said
effective by the movement of the piston over
sleeve ports acting to accelerate the closure of
said primary ports and other means in said
the passage 4through the cylinder inlet port
sleeve operable to add to the area through which 30 means.
gas is admitted from the cylinder inlet port
KENNETH L. HULSING.
means, to retard the time of admission through
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