close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2403865

код для вставки
July 9, 1946.*
'
_
P. LEBE'T
2,403,865
SUBERCHARGING CONTROL FOR ‘INTERNAL-COMBUSTION ENGINES
-
Filed Mardh' 1:5, 194s
‘‘‘‘’i
Patented July 9, 15946
2,403,865
‘UNITED’ ‘STATES PATEN r3v OFFICE
’
SUPERCHARGING CONTROL FOR INTER
NAL-COMBUSTION ENGINES
‘
Pierre ~. Lebet, , Arbon, Switzerland, assignor . to
Akticngcsellschaft A
zerland
dolph Saurer, Arbon, Swit
A
Application March-13, 1943, Serial No. 479,023
'
'
' In Germany January 9, 1942'
v
7 Claims. (Cl. 123—75)
.
,.
1
.
i
This inventionl relates to internal. combustion
engines provided with superchargingmeans. \
It is an object of this invention to improve
the supercharging of the cylinders without add-v
ing any separate control mechanism.
Since the time interval required for the super
eharging coincides with the compression stroke,
this interval must be kept as short as possible,
lustratine the different phases of the supercharg_
ing; period according to the invention.
Referring to the drawing and ?rst to-Figs. 1
and 2, in the cylinder I a piston 2 arranged for I
reciprocation is shown in its outer dead centre
position, in which it, uncovers the scavenging
ports 3 to which scavenging air is supplied through
a conduit ,4.
v
.
since otherwise the supercharging effect wouldbe
impaired by the inevitable shortening of the ef 10 Above the scavenging ports .3 a row of main
supercharging ports 5 and a second row or ad
fective compression stroke. Therefore a prereq
ditional supercharging ports '6 are provided. Com~
uisite for a satisfactory supercharging effect is
pressed supercharging air is fed to these ports
the provision of large inlet portsin conjunction
with high opening and closing speeds.
.
in a manner well known in the art.
The
ports 5 are arranged in that portion of the cyl
It has‘already beenproposed to provide super
charging ports in the cylinder wall which are 15 inder wall which isswept by the piston edge dur
ing the supercharging period, while the wall p01‘
controlled by a ring valve formed with corre
sponding slots, in order to obtain higher opening
tion, in which the ports 6 are formed, is not yet
and closing speeds.
swept by the piston when the supercharging pe
'
.
,
According to the present invention in engines 20 riod, has come to an end.- The circumferential
widthof the ports 5
6 is somewhat smaller
passage of the supercharging. ports is increased . than the width of. the. intervening wall portion
and the width of "the additional ports 6 is only
considerably and.hiehopening and closing speeds
of. this latter type thecrossesectional area of ,
are obtained'without additional control mem
about half that of themain'po'rts 5.
'
. ~ /
'
bers being required, by forming thatportion oi’ 25 0n the other hand thehumber of additional
ports 6 is. greater‘ than the number of main ports
the; cylinder wall which adjoins the row, at su
5. .Theic‘ylinder‘ .l is surrounded by a ring valve
nercharging ports and has not v.yctteen swam
8 which is formed with two rows of slots 10 and
by the working piston when the superchargine
period. is ended. with an additional row of ports
H which correspond in number, size and spacing
to the ports 5 and 6, respectively, in the cylinder.
controlled by additional slots in the ring valve,
these additional ports and slots being however “The slots Ill and I! are so staggered relative to
each other in the
so. dimensioned, that during each stroke of the
‘ direction, that
in one position of circumferential
ring, valve whereby the ?rst row of supercharging
the ring valve all ports 5 and
6 are closed- _. The valve is oscillated by means
ports isuncovered, the additional ports are ?rst
In other 35. of a driving ‘lug 9 acted upon by a rod I 4 op
erating against the action of a spring 15 and being
actuated by alcam shaitQIBQmQunted for rota
tional ports and slots. is made smaller than
,
the
tion in the engine frame‘ and carrying cam means
_ width or the main supercharging ports and their
I‘! (Fig. 2).. The lug 9 is arranged on the ring
control slots. On the other hand the numberv
of additional ports and slots and also their axial 40 valve 8 on the level of the interstice between the
ports 5 that. are controlled by the piston and the
length may be greater, than, the number and
ports 6 that are controlled exclusively by theslide
length of the main supercharging ports and their
uncovered and then covered again.
Words, the circumferential width of the addia
control slots.
valve, whereby the stress exerted by the lug 9
on the sleeve is appropriately distributed.
forming part thereof, an embodiment of the in 45 The stroke of the ring valve is greater than the
width of‘ the ports 5 by the amount required for
vention is illustrated diagrammatically by way of
In the drawing affixed to this speci?cation and
'
.
closing said ports in a pressure-tight manner and
In the drawing
1‘
on the other hand completely uncovering them.
The additional ports 6 and
'
Fig. 1 is a section of the lower part ofthe
combustion cylinder of an engine according to 50
example.
this invention.
Fig. 2 is a. section on the line II—II inrig. '1'
wide as the ports 5 and therefore are completely‘
covered when only the ?rst halves of the main
ports are uncovered. When the ports 5 are com
and
Figs. 3, 4 and 5 are cylinder deevlopments il
65
pletely uncovered, the additional ports 6 are an
readyclosed,
‘
>
‘
2,403,865
Figs. 3 to 5 illustrate the relative positions of
the working piston and the ring valve relative to
the supercharging ports at three consecutive
times, the ports 5 and 6 in the cylinder wall being
schematically illustrated for different time mo
The contour of the
piston and the
'
portion of the cylinder wall swept by the piston
'
’
piston arranged for reciprocation therein, ex
haust ports in said cylinder near the compression
stroke end of said piston, exhaust valves for said
10 ports, a ring valve concentric with
ing said cylinder and two pairs of registering
are indicated by the chain-dotted line [2 and the
hatched surface l3 respectively.
4
in combination, a combustion cylinder and a
ments. In thesefigures the slots ,3, 5 and v6 in
the cylinder wallare shown in full lines, while
the slots Ni, ii in the valve ring are shown in
dash lines.
.
the belts nearer to the compression stroke end
of said cylinder being materially narrower and
of greater axial length than the ports in the belts
farther from said cylinder end, and means for
oscillating said ring valve.
3._ An internal combustion engine comprising
belts of intake ports arranged in axial align
ment- in saidvalve and in the part of the cylin
'
Fig. 3 illustrates the positionofthe parts at
der wall sweptby said piston respectively, said
percharging ports 5 and 6 are still covered by the 15 pairs of ports being controlled by said ring valve,
the'ports
the belts nearer to the compression
ring valve and the piston moving away from the
stroke end of said cylinder being materially nar
outer dead centre is on the verge oiclosing the.
rower and of greater axial length and more nar
scavenging ports 3. Approximately at the same
time the exhaust ports 20 arranged at the upper ' ’ rowly spaced than the ports in the belts farther
20 from said cylinder end, and means for oscillat
end of the cylinder are closed by the valves 2|.
Fig. 4. illustrates the position of the parts in the
ing said .ring valve.
_
4. An internal combustion engine comprising
middle of the supercharging period. The main
in combination, a combustion cylinder and a pis
ports 5 are half opened, the additional ports 6,
ton arranged for reciprocation therein, exhaust
beingnarrower, are open altogether. In the sec
ports in said cylinder near the compression
0nd half of the supercharging period the ring
stroke end of said piston, exhaust valve for said
valve uncovers the ports 5 completely, whereas
ports, a ring valve concentric with and contact
the narrower ports 6 are closed again.
.
ing said cylinder and two pairs of registering
Fig. 5 illustrates the condition existing at the
belts of intake ports arranged in axial alignment
end of the supercharging period. The ports 6
in said valve and in the port of the cylinder wall
are closed by the ring valve, and the ports 5 are
swept by said piston respectively, said pairs of
left open by the valve, but are covered by the
ports being controlled by said ring valve, the
working piston. As the working piston moves
ports in the belts nearer to the compression
on, the compression stroke begins. After the ad
ditional ports 6 have been covered also by the 35 stroke end of said cylinder being about half as
wide and about double as long as the ports in the
‘working piston, the ring valve 8 is returned into
belts farther from said cylinder end, and means
the end of the scavenging period.- Here the su-- '
its initial position shown in Fig. 3.
'
-
~
The mechanism above described‘ as forming
an object of the invention acts toward‘improving'
the supercharging of the cylinders-by increasing
for oscillating said ring valve.
'
5. An internal combustion engine comprising
40
during the ?rst part, for instance during the first
half, of a normal supercharging period the cross
sectional area of the passage ‘admitting the su
percharging medium into the cylinders.
‘
I wish it to be understood that I do not desirev V
to be limited to the exact ‘details shown and de
scribed, ior obvious modi?cations will ‘occur. to a
in combination, a combustion cylinder and a pis
ton arranged for reciprocation therein, exhaust
ports in said cylinder near the compression
stroke end of said piston, a belt of intake ports
in the cylinder wall near the suction-stroke end
of the cylinder and{ - two additional belts of
intake ports in the cylinder wall in axial align
ment with said ?rst belt, a ring valve concentric
with and contacting the part of- said cylinder
formed with said two additional belts of intake
I claim:
1. An internal combustion engine comprising to ports, said-valve being formed with two belts of
ports registering with said additional cylinder
in combination, a cylinder and a piston arranged
ports, the intake ports in said cylinder and said
for reciprocation therein, exhaust ports in ‘said
valve which are next to the compression stroke
cylinder near the compression stroke end of said
end of said cylinder being narrower than the
piston, exhaust valve for said ports,'a ring valve
concentric with and contacting said cylinder, and 55 intake ports ‘forming the axially adjoining belts
and means for oscillating said ring valve.
two pairs of registering belts of intake ports ar
6. An internal combustion engine comprising
ranged in axial alignment in said valve and‘ in
in combination, a cylinder and a piston arranged
the part of the cylinder wall swept by said piston
person skilled in the art.
'
'
" '
respectively, said pairs of parts being controlled
by said ring valve, the ports in the belts nearerv
stroke end of said cylinder
, to the compression
being materially narrower than the ports in the‘
belts farther away from said cylinder end, and
means for oscillating said ring valve.
‘ for reciprocation therein, exhaust ports in said
so
cylinder near the compression stroke end of said
piston, an oscillatory ring valve concentric with
and contacting said cylinder and two pairs of
registering belts of intake ports arranged in axial
aligmnent' in said valve and in the part of the
, '
2. An internal combustion engine comprising 65 cylinder wall swept by said piston, respectively,
in combination, a combustion cylinder and a, pis
ton'arranged for reciprocation therein, exhaust
ports in said cylinder‘near the compression strokev
the width of
compression
direction of
being about
the ports in the belts nearer to the
stroke end of said cylinder in the
the movement of the ring valve,
one half of the width of the ports
end of said piston, exhaust valve for said ports,
a ring valve concentric with and contacting said 70 in dthe belts farther remote from said cylinder
cylinder, and two pairs of registering belts of in‘
take ports arranged in axial alignment in said‘
'7. An ‘internal combustion engine comprising
in combination, a cylinder and a piston arranged
valve and in the part of the cylinder wall swept
by said piston, respectively, said pairs of ports 75 for reciprocation therein, exhaust ports‘in said
being controlled by said ring valve, the ports in
en
.
'
2,403,865
cylinder near the compression stroke end of said '
6
piston, an oscillatory ring valve concentric'with
to ‘the compression stroke end of said cylinder
and contacting said cylinder and two pairs of
registering belts of intake ports arranged inv
axial alignment in said valve and in the part of
the cylinder wall swept by said piston, respec
tively, the width of the ports in the belts nearer
“ in the direction of the movement of the'ring
valve, being about one half of the width of the
ports in the belts farther remote from said cylin
‘der end, 1; e stroke of the ring valve being about
equal to the width of the latter ports.
PIERRE LEBET.
Документ
Категория
Без категории
Просмотров
0
Размер файла
451 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа