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Патент USA US2408599

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Oct. 1, 1946.
v
L. L. BELTz
> INTERNÀL-COMBUSTION
2,408,598
ENGINE
Filed June 2, 1944
«By
Patented Oct. 1, 1946
2,408,598
STATE s
' `UNITED
PATENT oFFlcE
2,408,598 Y
IN TERNALÁ COMBUSTION ENGINE
Lester L. Beltz, Detroit, Mich„ assignor to Pack
ard. Motor Car» Company. Detroit, Mich., a cor
poration of Michigan
Application June 2, 1944, Serial No. 538,376
6 claims. ' (c1. 12s-_179)
2
This invention relates to internal combustion
engines, and more particularly to electric start
circuit in which wire I9 is connected to terminal
ing and ingition systems for engines.
wire 22 is connected to terminal 23 on the elec
tric motor and to switch contact 24. The circuit
. v
In starting internal combustion engines
equipped with a magneto and distributor for sup
plying current-,to the spark plugs, the engine is
turning so slowly that the current development is
20 of the battery gand to contact 2|. Another
also includesa switch 25 movable to engage the
switch contacts 2l and 24 or to be spaced there
from by4 a spring 2B bearing against a stationary
part of the engine 21.
unsatisfactory to ignite the engine fuel charges
Switch 25 is automatically closed by solenoid28
and an auxiliary booster system isxoften utilized
for supplying stronger current to> the distributor. 10 arranged in a circuit leading to the storage bat
tery. This circuit comprises a wire 29 connected
Such booster systems are connected with a stor
with terminals 30 and 3|, a wire 32 connected
age battery and-arev controlled to function con
with terminal 3| and switch contact 33, and a
currently-,with the electric system between the bat
wire 34 connected with switch contact 35 and
tory> and the starter motor. The booster circuit
the battery terminal 2t.' This circuit is controlled
includes a grounded booster coil connected with
by switch member 36 that is manually operated
an electrode that trails the distributor electrode
to be engaged with or spaced from switch con
in a path engaging distributor contacts connected
with thespark plugs.
,
tacts'33., 35,.
'
'
Y
'
When the main control switch 36 is closed,
When such a sparking system is employed with
solenoid 2-8 is energized moving switch 25 to en
engines used as Aa power plant for airplanes,
gage contacts 2I' and 24, thus completing the cir
trouble is encountered` in rareiied atmosphere due
cuit from the battery to the electric starter mo
to the dielectric of the air breaking clown. When
The motor will drive the flywheel I 3y through
’ tor.
such break down occurs, current from the maefnv
gear I1 that is moved to mesh with the ring
neto jumps to the booster electrode and the mag
neto will be grounded through the booster coil 25 gear I8. When the switch 36 is open, thev electric
circuit to the starter motor is broken` and the
thus seriously interfering with or cutting ou
starter *gear* I1 is disengaged from the flywheel.
engine ignition.
'
' The electric ignition system includes magneto
An object of the invention is to provide an ig
40, distributor 4I and spark plugs 42. The mag
nition system, of the type referred to, in which the
possibility of shorting the magneto through the 30 neto rotor and the distributor rotor 31 are ro
tated by shaft 43 carrying gear 44 driven by gear
booster system is eliminated.
'
»
45 that is operated by the usual mechanism driven
Another object of the invention is to provide a
control for an ignition booster system, of the ' by the' engine crankshaft. The distributor cas
ing carries-spaced contacts 46 connected .by wires
type referred to, so that the circuit between the
grounded booster coi-l and electrode is made or 35 41' with the spark plugs. The distributor rotor
y31-has a’contact 48 .from which electrode 49 eX
broken concurrently with the electric circuit of
tends so that it will pass adjacent contacts 46
an engine starter motor.
during its Arotation and current is supplied to con
Other objects of the invention willappear from
tact 48 from the magneto.
the following description taken in connection
An ignition booster system is provided and its
with the drawing, which forms a part of this 40
circuit includes a controlled portion of the sole
speciñcation, and in which:
noid circuit and a grounded booster coil 50. The
Fig. 1 is a wiring diagram of an ignition and
grounded booster coil has a terminal 5I that is
starting system shown applied to a fragmentary
connected by wire 52 with terminal 3l and the
elevational View of an engine;
`
Fig. 2 is a sectional view through the distrib 45 coil may be connected with terminal 53 on the
distributor which in turn is connected by wiring
utor in the ignition system.
55 and- 56 to a booster electrode 54 secured to
In the drawing, a conventional engine I Il is
the rotor 31 of the distributor. This booster elec
illustrated as having a head portion I I, four cyl
trode is arranged so that it rotates adjacent con
inders I2, ñywheel I3 and a shelf portion I4.
tacts 46 and trails electrode 49 approximately the
A conventional electric starter system is pro
distance between two of the contacts 46. ,
vided to turn the ñywheel, and such system in
If the grounded booster coil is wired directly
cludes an electric motor I5 for rotating a shaft
to the booster electrode, current from the main
I6 carrying gear I1 adapted to mesh wtih ring
ignition electrode 49 will jump to the booster elec
gear I 8 on the flywheel. The electric starter mo
trede so that the magneto will ‘be grounded
tor is connected with the storage battery I8 by a
f
i
2,408,598
'
4
3
through the coil when an altitude is reached
where the dielectric of the air breaks down. In
order -to prevent such grounding of the magneto
in rareñed atmosphere and maintain engine igni
tion. I provide a control means, in the form of
a switch 51, in the booster circuit between the
electrode for engaging the distributor contacts,
said booster electrode rotating with and trailing
the distributor electrode, of switch means in the
booster circuit between the coil and the elec
trode, and means for automatically opening said
switch means when the engine is operating un
grounded booster «coil and the terminal 53~ of the
distributor. Switch con-tact 58 is connected to
der its own power.
the booster coil terminal 59 by Wire 60 and switch
contact 6| is connected to terminal 53 lby Wire 62.r
magneto and a distributor in which an electrode
is rotated by the engine and engages contacts
This switch 5l could be manually operated but
to complete circuits from the magneto to the
_
_
y,
3. In an electric sparking system having a
spark plugs, the combination with a booster cir
I prefer to operate it automatically and concur
cuit having a grounded booster coil and a booster
rently with the main control switch 3E. Switch
>electrode for engaging the distributor contacts,
57 is urged away from contacts 5B and 5l by a
said booster electrode rotating with and trailing
spring 63 bearing against a stationary portion
the distributor electrode, of normally open switch
64 of the engine and a solenoid 65 is utilized to
.means in the booster circuit between the coil and
close lthe switch when energized. The. solenoid
the electrode, and means for closing said switch
is connected with the booster circuit and the cir
means while cranking the engine for starting.
cuit for starter switch solenoid 28 by wire 66 at
fl. In an electric sparking system having a
tached to terminals 3l and 6l. Because of this 20
magneto and a, distributor in which an electrode
control arrangement of solenoid 65, switch 5'!
is rotated by the engine and engages contacts to
will be moved to establish the booster circuit
complete circuits from the magneto to spark
concurrently with closing of the circuit for sole
plugs, the combination with a booster circuit
noid 28 by means of the main control switch 3S.
Thus, solenoid actuated switches 25 and 51 will 25 having a grounded booster coil and a booster
electrode for engaging the distributor contacts,
operate similarly and -concurrently under control
said booster electrode rotating with and trail
of switch 35. Whenever switch 36 is open, the
ing the distributor electrode, of switch means in
circuit between IJthe booster coil 50 and the dis
the booster circuit between the coil vand the elec
tributor is broken by spring 63 opening switch 51
and consequently the magneto can not be so trode, and a solenoid for controlling said switch
means.
f
grounded through the booster coil when the
5.~ In an engine having an electric starter motor
booster circuit is broken. It will thus be seen
system, a, magneto and distributor ignition sys
that the main ignition system can not be inter
tem and a booster ignition system including a
rupted by grounding through the booster sys
grounded coil connected with the distributor igni
tem during engine operation in rarefied atmos
tion system, control means 'comprising switch
phere.
means in the starter system, switch means in the
It will be understood that various forms of
`booster system between the coil and the dis
the invention other than that described above
tributor ignition system, solenoids for operating
may be used without departing from the spirit
or scope of the invention.
40 both switch means when energized, electric cir
cuits for the solenoids having a, portion in com
What is claimed is:
mon, and a main control switch in said portion
l. In an electric sparking system having a
is rotated by the engine and engages contacts to
of the circuits.
6. In an engine having an electric starter mo
magneto and a distributor in which an electrode
complete circuits from the magneto to spark
tor, a magneto and distributor ignition system
plugs, the combination 'with a booster circuit hav
ing a, grounded booster coil and a booster elec
and a, booster ignition system including a coil
trode for engaging the distributor contacts, said
‘booster electrode rotating with and trailing the
control means comprising an electric circuit for
the starter motor lhaving a switch therein, an
electric circuit for the booster system having a
grounded coil, an electrode and a switch between
the coil and the electrode, solenoids for oper
distributor electrode, of switch means in the
booster circuit between the coil and the elec
trode.
2. In an electric sparking system having 1a
magneto and a distributor in which an electrode
is rotated by the engine and enga-ges contacts
to complete circuits from the magneto to the
spark plugs, the combination with a booster cir
cuit having a grounded booster coil and a booster
connected with the distributor ignition system,
ating said switches, electric circuits for the sole
noids, said solenoid circuits and said booster cir
cuit each having a portion in-common, anda
main control switch in said common portion of
the circuits.
LESTER L. BEL'I‘Z.
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