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Патент USA US2381610

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M. MALLQRY
Aug. 7, 1945;
2,381,61U
IGNITION SYS'I‘EM FOR INTERNAL-COMBUSTION ENGINES
Filed Oct. 19 , 1944
‘My[9
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INVENTOR.
Mar/an Ma?a/y
2,381,610
Patented Aug. 7, 1945
~
UNITED STATES PATENT‘ OFFICE
IGNITION SYSTEM FOR INTERNAL-'
COMBUSTION ENGINES
Marion Mallory, Detroit, Mich.
Application October 19, 1944, Serial No. 559,423
8 Claims. (Cl. 123-117)
\tle, there is too much spark advance when the
‘This invention relates to an ignition system
throttle is slightly moved towards an open posi
for an internal combustion engine and more par
ticularly to an ignition timer which is automati
tion due to the high velocity passing by the throt
tle tip. Furthermore, once this high suction is
in the suction device the spark will not retard
quickly enough to‘ prevent spark knocks when the
cally controlled in accordance with the speed and
load.
,
-
'
For smooth idling, an extreme retardation of
the timing is necessary, .but upon a slight open
ing of the throttle, there should be an appreciable
immediate advance of the timing. Following this,
throttle is opened suddenly even though the vac
uum in the manifold does decrease slightly due
' to opening the throttle.
.
there should be a further gradual advance as the
It is an object of my invention to produce an
speed increases, but when the engine is working
ignition system wherein the intake passageway
under full load with wide open throttle at either
vacuum is used to advance the spark at low en
low or high speeds, it is desirable to retard the
gine speeds and as the throttle valve is moved
advance to some extent to prevent detonation.
only slightly open from idle position, and to avoid
This invention contemplates an ignition system 15 the vacuum created by the velocity between the
for an internal combustion engine which will
throttle valve and the ori?ce from excessively
automatically time the spark as outlined above.
advancing spark.
In pressure ignition systems the intake pas
A further object is to cause the vacuum in the ‘
sageway pressures are used to actuate a suction
suction device to decrease more rapidly when the
device for controlling the timer. The suction de 20 throttle is suddenly opened.
vice is connected with an ori?ce in the intake ,
passageway on the atmosphere side of the throt
tle valve when the throttle is in idle position.
As the throttle opens the ori?ce passes on to the
engine side of the throttle valve. In all of these 25
ignitioii systems wherein the manifold vacuum‘
is used to advance. the timer the problem has‘
beenthat of getting a sufficient and early enough
spark advance as the throttle opens from idle
The ?rst object is accomplished by utilizing the
vacuum produced by the velocity between the
throttle valve and the ori?ce to control a valve
which controls communication between the suc
tion device and the intake passageway on the en
gine side of the throttle valve.
The second object is accomplished by shut
ting off the communication between the suction
device that advances and retards the spark and
position. To make the spark advance early 30 the intake manifold when the manifold vacuum
enough, in some instances the ori?ce has been
drops to a predetermined point due to opening
positioned immediately adjacent to the throttle
the throttle valve.
_
valve when in idle position so that the spark will
The drawing shows my ignition system.
immediately start to advance on the slightest
The parts of my invention are as follows: in
opening movement of the throttle but when this
take
passageway I, inlet opening 2, outlet to the
is done the velocity is so high between the throttle
engine
3, throttle valve 4, valve shaft 5, crank 6
valve and the ori?ce that the spark advances
?xed on the outer end of valve shaft 5, venturi l
too much. As a matter of fact, the velocity of
in the intake passageway I, suction device 8, flex
the motive ?uid by the ori?ce when the throttle
ible
diaphragm 9, suction chamber ID, compres
40
valve is only ‘slightly open creates a vacuum at
sion spring“, timer cam l2, plate I3, circuit
the ori?ce which is even higher than the manifold
breaker l4 mounted on plate l3, rod I5 ?xed at
vacuum., To avoid too high spark advance when
one
end to diaphragm 9 and pivoted at the other
the, throttle is only slightly opened, others have
end to- plate I3, conduit I6} connecting suction
located this ori?ce somewhat above the throttle
chamber II] with branch conduit I'I leading to
valved-when closed to avoid the venturi or velocity
ori?ce ill in venturi ‘I and with branch conduit l9
effect but in such cases the spark advance comes
leading to ori?ce 2,0 in intake passageway I on
inltoolate, in other words‘ the throttle must be
the~engine side of valve 4, piston valve 2| in cyl
open-,f'or‘a considerable distance before the spark
inder 22 for controlling communication between
will‘be‘advanced and, as it is necessary to ad
conduit l6 and ori?ce 20, compression spring 23
vancethe?s'park immediately when the throttle
tending to keep valve 2| closed, ori?ce 24 posi
isnbvedgaway ,from idle position to get the best
tioned immediately adjacent to, and on the at
"results, it is necessary to have the ori?ce set very
mosphere side of, throttle valve 4 when in idle
,closeltov the throttle. position, air bleed 25 for cylinder 22, and orifices
Of course, as stated, in the usual pressure igni
26 and 21.
55
tion system, if the ori?ce is set close to the throt
2
2,301,010
The operation of my device is as follows: as
suming throttle valve 4 is closed with ori?ce 24 ~
on the atmosphere side of valve 4, spring 23
suction device whereby the ignition timer is ac
' tuated to advance the spark.
2. In an internal combustion engine having an
holds piston valve 2| over ori?ces 28 and 21 to
intake passageway and a throttle valve control
thereby cut of! ori?ce 20 from conduit It. At
this time the pressure in suction chamber III will
ling the ?ow of motive ?uid through the passage
way, the combination of an ignition timer,_a suc
tion device for controlling said ignition timer, an
ori?ce positioned in the intake passageway on the
atmosphere side of the throttle valve in all po~
be atmospheric and the distributor or timer will
be in idle position, that is, retarded. If throt
tle 4 is moved toward open position, the high ve
, locity of the motive ?uid ?owing by ori?ce 24 will 10 sitions of the throttle valve, a second ori?ce po
' create a vacuum in cylinder 22 thereby moving
piston valve 2| toward the left, ‘compressing
sitioned in the intake passageway on the engine
side of the throttle valve in all positions of the
spring 23 and placing ori?ces 26 and 21 in com
throttle valve, conduits connecting the ?rst and
second ori?ces with the suction device and with
spool valve 2| so that the intake manifold vac 15 each other, a third ori?ce in the intake passage
uum will act through ori?ce 20, conduits l9 and
way positioned immediately adjacent to and on
the atmosphere side of the throttle valve when
I8, suction chamber l0, ?exible diaphragm 9,
and rod l5 to rotate plate I 3 clockwise to advance
closed for idle, a cylinder communicating with
the spark. However, this advance in the spark
said third ori?ce, a, valve in said cylinder con
timing will not be as high as it would if ori?ce
trolling communication between the second ori
munication through circumferential groove 28 in
24 were connected directly to conduit l8 and
?ce and the suction device and-between the sec
valve 2| eliminated.
ond ori?ce and the ?rst ori?ce, said valve being
If throttle 4 is moved wide open, then the
closed when the throttle valve is in idle position
vacuum at ori?ce 24 is substantially eliminated
and responding to the suction created by the ?uid
so that valve 2| moves toward the right, closing 25 ?ow by the third ori?ce as the throttle valve
opens from idle position to place the second ori
off ori?ce 20 from conduit It so that the suction
device 8 is now in?uenced by the vacuum cre
?ce in communication with the ?rst ori?ce and
the section device whereby the suction device re
ated by the velocity of the ?uid ?owing through
sponds to the suction in the intake passageway
venturi 1 past ori?ce I8. Thus, for wide open
throttle or full load operation the ignition tim 30 and actuates the ignition timer to advance the
spark.
'
ing advance is controlled by the vacuum cre
ated by the motive ?uid ?owing through venturi
3. In an internal combustion engine having an
intake passageway and a throttle valve con
1 past ori?ce l8 and for part throttle or load op
trolling the ?ow of motive fluid through the pas
eration the ignition timing is controlled by the
intake passageway suction at ori?ce 20 as bled 35 sageway, the combination of an ignition timer,
a suction device for controlling said ignition
down through ori?ce l8 and passageway H.
timer. a venturi in the intake passageway posi
In the event throttle valve 4 is moved slightly
tioned on the atmosphere side of the throttle, an
' past ori?ce 24 the full manifold vacuum force
ori?ce positioned in the venturi, a, second ori?ce
-will.be on the diaphragm 9 which will give con
siderable spark advance and, if the throttle is 40 positioned in the intake passageway on the engine side of the throttle valve in all positions
opened further to cause a further drop in the
manifold vacuum, spring 23 will move piston to' .of the ‘throttle valve, conduits connecting the
said ori?ces with the suction device, a third ori
the right causing the manifold vacuum to be
?ce in the intake passageway positioned adja
shut off from the suction device and the spark
will be retarded to prevent spark knocks on ac 45 cent to and on the atmosphere side of the throt
tle valve when in idle position, and suction re~
celeration when the throttle is moved only a
short distance, so it can be seen that the spring
22 is the main control or varying factor of the
vacuum forces in the suction device instead of
sponsive valve means controlling communication
between the suction device and the second ori
?ce, said valve means shutting off communica
50 tion between the second ori?ce and the suction
the throttle 4.
device when the throttle valve is in idle position
I claim:
and responding to the suction created by the
1. In an internalcombustion engine having an
?uid ?ow by the third ori?ce as the throttle valve
intake passageway and a throttle valve control
opens from idle position to place the second ori_
ling the ?ow of motive ?uid through the passage
way, the combination of an ignition timer, a suc 55 ?ce in communication with the suction chamber
of said suction device whereby the ignition timer
tion device for controlling said ignition timer, an
is actuated to advance the spark.
ori?ce positioned in the intake passageway on the
4. ,In an internal combustion engine having
atmosphere side of the throttle valve in all po
an intake passageway and a throttle valve con
sitions of the throttle valve, a second ori?ce po
sitioned in the intake passageway on the engine 60 trolling the ?ow of motive ?uid through the pas
sageway, the combination of an ignition timer,v a
side of the throttle valve in all positions of the
suction device for controlling said ignition timer, _
throttle valve, conduits connecting the said ori
a venturi in the intake passageway positioned on» ‘
?ces with the suction device, a third ori?ce in the
the atmosphere side of the throttle, an ori?ce
intake passageway positioned adjacent _to and
on the atmosphere side of the throttle valve 65 positioned in the venturi, a second ori?ce posi
tioned in the intake passageway on the engine
when in idle position, and suction responsive
side of the throttle valve in all positions of the
valve means controlling communication between '
throttle valve, conduits connecting the ?rst and
the suction device and the second ori?ce, said
second ori?ces with the suction device and with
valve means shutting off communication between
the second ori?ce and the suction device when 70 each other, a third ori?ce in the intake passage
way positioned immediately adjacent to and.on
the throttle valve is in idle position and respond
the atmosphere side of the throttle valve when
ing to the suction created by the ?uid ?ow by
closed for idle, a cylinder communicating with
the third ori?ce as the throttle valve opens from
idle position to place the second ori?ce in com
said third ori?ce, a valve in said cylinder con
munication with the suction chamber of said 75 trolling communication between the second ori
2,881,610
‘ opens from idle position to place the second ori
.
3
a suction device for controlling said ignition
?ce in communication with the ?rst ori?ce and
the suction device whereby the suction device
responds to the suction in the intake passage
way and actuates the ignition timer to advance
i
'
vance the spark.
7. In an internal combustion engine having an
intake passageway and a throttle valve control
ling the ?ow of motive fluid through the pas
sageway, the combination of an ignition timer,
ond ori?ce and the ?rst ori?ce, said valve being
closed when the throttle valve is in idle position
and responding to the suction created by the
?uid ?ow by the third ori?ce as the throttle valve
the spark.
'
whereby the ignition timer is actuated to ad
' ?ce and the suction device and between the sec
timer, an ori?ce positioned in the intake pas
sageway on the engine side of, the throttle valve
in all positions of the throttle valve, a conduit
connecting the ori?ce with the suction device, a
second ori?ce in the intake passageway posi
tioned adjacent to and on the atmosphere side
of the throttle valve when closed for idle, said
second ori?ce passing on to the engine side of
,
5. In an internal combustion engine having
an intake passageway and a throttle valve con
trolling the ?ow of motive ?uid through the
passageway, the combination of an ignition
timer, a suction device for controlling said ig
nition timer, an ori?ce positioned in the intake
the throttle valve during the initial opening
movement of the throttle valve, and suction re
sponsive valve means controlling communication
between the suction device and the ?rst ori?ce,
said valve means shutting off communication be
tween the ?rst ori?ce and the suction device
when the throttle valve is in idle position and
responding to the suction created by the ?uid
?ow by the second ori?ce immediately as the
throttle valve opens from idle position to thereby
place the ?rst ori?ce in communication with the
suction chamber of the suction device whereby
the ignition timer is actuated to advance the
passageway on the atmosphere side of the throt
tle valve in all positions of the throttle valve, a
second ori?ce positioned in the intake passage
way on the engine side of the throttle valve in
all positions of the throttle valve, conduitscon
necting the said ori?ces with the suction device;
a third ori?ce in the intake passageway posi
tioned adjacent to and on the atmosphere side of
the throttle valve when closed for idle, a cylin
der communicating with said third orifice and
connected into the conduit between the second
ori?ce and the suction device, a piston valve in.
said cylinder closing off the conduit between the
second ori?ce and the suction device when the
throttle valve is in idle position, said piston valve
spark.
8. In an internal combustion engine having an
intake passageway and a throttle valve control
responding to the suction created by the ?uid
ling the flow of motive ?uid through the pas
sageway, the combination of an ignition timer, a
flow by the third ori?ce as the throttle valve im
mediately opens from idle position to place the
suction device for controlling said ignition timer,
a venturi in the intake passageway positioned on
the atmosphere side of the throttle, an ori?ce po
sitioned in the venturi, a second ori?ce positioned
in the intake passageway on the engine side of the
throttle valve in all positions of the throttle
second ori?ce in communictaion with the suc
tion device whereby the ignition timer is actu
ated to advance the spark.
.
'
6. In an internal combustion engine having an
intake passageway and a throttle valve control-~
ling the ?ow of motive fluid through the pas
valve, conduits connecting the said ori?ces with
the suction device, a third ori?ce in the intake
sageway, the combination of an ignition timer,
a suction device for controlling said ignition
timer, a venturi in the intake, passageway posi
tioned on the atmosphere side of the throttle,
passageway positioned adjacent to and on the
atmosphere side of the throttle valve when closed
for idle, a cylinder communicating with said third
ori?ce and‘ connected into the conduit between
the second ori?ce and the suction device, a piston
valve in said cylinder closing o? the conduit be
tween the second ori?ce and the suction device
when the throttle valve is in idle position, said
an ori?ce positioned in,th/e venturi, a second ori— ?ce positioned in the intake passageway on the
engine side of the throttle valve in all positions
of the throttle valve, conduits connecting the
said ori?ces with the suction device, a third ori
?ce in the intake passageway positioned adja
cent to and on the atmosphere side of the throt~
tle valve when closed for idle, a cylinder com
municating with said third ori?ce and connected
into the conduit between the second ori?ce and
the suction device, a piston valve in said cylin
piston valve responding to the suction created by
the fluid ?ow by the third ori?ce as the throttle
valve immediately opens from idle position to
place the second ori?ce in communication with
the suction device whereby the ignition timer. is
:11 actuated to advance the spark, and resilient
der closing oi! the conduit between the‘second
ori?ce and the suction device when the. throttle
valve is in idle position, said piston valve respond.
ing to the suction created by the ?uid ?ow by 60
the third ori?ce as the throttle valve immediately '
opens from idle‘posltlon to place the second ori
?ce in- communication with the suction device
means for closing said piston valve when the
throttle valve is substantially wide open whereby
the suction device responds to the vacuum cre
ated at‘ the ?rst ori?ce by the velocity of the
motive ?uid ?owing through the venturi to con
trol the spark advance.
'
MARICN MALLORY.
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