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Патент USA US3028857

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April 10, 1962
i M. F. STERNER
3,028,847
ENGINE GOVERNOR ACTUATOR
Filed Dec. 2, 1957
INVENTOR.
MELvlN ESTERNER
BY W
)
Y ATToRNE s
tice
geraet? y
vPatented Apr. 10, ‘i962
2
3,023,847
ENGÍNE GOVERNOR ACTUATÜR
Melvin F. Steruer, Blooxntieid Hilis, Mich., assîgnor to
Holley Carburetor Company, Van Dyke, Mich., a cor
poration of Michigan
Fiied Dec. 2, 1957, Ser. No. 699,970
6 Claims. (Cl. 12S-_103)
The present invention relates generally to engine gov
connected a rod 20 the opposite end of which is in turn
»secured to a flexible diaphragm 22 mounted in a housing
indicated generally at 24 and composed of housing sec
tions 26 and 28 between which the edges of the diaphragm
22 are clamped. The diaphragm divides the interior of
the housing 24 into chambers 30 and 32, the chamber 32
being a pressure chamber as will subsequently be de
scribed. The chamber 30 is vented to atmosphere as
indicated at 34 and includes a compression spring 36
ernors, and more specifically to means for actuating such 10 biasing -the diaphragm to the right as viewed in FIGURE
1 and hence in a direction to maintain the governor
governors.
'
y
In the past engine governors for internal combustion
engines using carbureting means have been provided which
employed vacuum as the source of power for operating
the speed control means, usually the throttle. Under cer
tain conditions it becamerditiicult and costly to produce a
vacuum actuated governor having a low r.p.m. spread
without at the same time having a tendency to surge.
throttle plate 14 in positively open position. It will be
understood that suitable stop means (not shown) are pro
vided to limit opening movement of the throttle plate 14
to the position shown. It will be apparent that when
pressure is built up in the chamber 32, the diaphragm 22
moves to the left thus moving the governor throttle plate
14 toward closed position.
Y
This problem has been magnified in the recent past by
In accordance with the present invention the means for
the fact that the automotive industry is using a con 20 supplying hydraulic fluid to the chamber 32 comprises a
tinually increasing percentage of multiple barrel carbu
retors.
unit indicated generally at 40 including a housing portion
Because of this trend the vacuum available for
41 having a pumping chamber 42 therein which receives
operating the governor and other devices has diminished
and the resulting forces are becoming insufficient for
proper governor control.
With the foregoing in mind it is an object of the present
a rotary impeller 44 connected to a drive shaft 46 which
in turn is connected to a rotating part of the internal corn
invention to provide a means for actuating a governor
bustion engine to be controlled, such for example as its
cam shaft. 'Ihe shaft 46 has an axially extending pas~
sage 48 communicating with radially extending passages
which may he designed to have a very low r.p.m. spread.
50 and these in turn communicate with an iniet port 52
It is a further object of the present invention to provide
supplied with hydraulic fluid through a fitting 54 con
a governor as defined in the preceding paragraph char 30 nected to a conduit 56. The impeller 44 includes a ra
acterized by the fact that any tendency to surge has been
dially extending passage 58 which communicates with the
axially extending passage 48. Accordingly, as the shaft
46 is rotated by operation of the engine, pressure of the
hydraulic ñuid in the chamber 42 is built up by centrif
ent on a supply of vacuum.
35 ugal action resulting from rotation of the impeller 44.
It is a further object of the present invention to provide _
The housing portion 41 includes a recess 60 enclosed
hydraulic fluid pressure actuated motive means for op
by a cover portion 62 which clamps the edges of a ilexible
erating a speed control member, in combination with a
diaphragm 64 thereby providing an internal pressure
source of hydraulic pressure variable in accordance with
chamber 66. Between the flexible diaphragm 64 and the
eliminated.
'
It is a further object of the present invention to provide
a means for actuating the governor which is not depend
engine speed.
bottom of the recess 60 there is provided a compression
spring 68 and the space containing the spring is Vented
to atmosphere as indicated at 70. The flexible diaphragm
pressure dependent on engine speed.
64 carries a valve element 72 cooperable with an outlet
Still more specifically, it is an object of the present in»
valve port 74. The pressure 0r pumping chamber 42 is
vention to provide, for use in conjunction with an inter 45 connected by a conduit or passage 76 with the pressure
nal combustion engine, a source of hydraulic liuid under
chamber 66.
a Variable pressure dependent on engine speed, in com
The unit 40 is connected to a supply conduit 78 to the
bination with means to prevent supply of hydraulic ñuid
interior of the pressure chamber 32. In addition a fluid
at a pressure less than that corresponding to a predeter
return line St) is provided extending from the pressure
More specifically, it is an object of the present inven
tion to provide a source of hydraulic fluid under a Variable
mined minimum engine speed.
Other objects and features of the invention will become
apparent as the description proceeds, especially when
taken in conjunction ‘with the accompanying drawing, il
lustrating preferred embodiments of the invention, where
1n:
FIGURE 1 is a schematic sectional View illustrating
the present invention.
FIGURE 2 is a sectional View illustrating a modifica
50 chamber 32 to the reservoir or other source of hydraulic
fluid. A restriction S2 is providediin the return passage
80 so as to establish some point of critical iiow.
With the foregoing construction in mind it will be
observed that when the engine is started rotation is im~
55 parted to the shaft 46 and pressure of the hydraulic ñuid
in the pressure chamber 42 increases as a result of the
action of the impeller 44. This pressure is transmitted
through the passage ’7 6 to the pressure chamber 66. How
ever, escape of lluid under pressure is prevented since the
tion of the control valve.
"
FÍGURE 3 is a sectional view of a modified pressure 60 valve ’72 is on its seat and remains in closed relation until
the pressure within the pressure chamber 66 reaches a_
supply unit.
value as determined by the strength of the spring 68 which
In the embodiment of the invention illustrated in FIG~
corresponds to some predetermined engine speed. At this
URE 1 there is provided a unit for supplying hydraulic
time the valve 72 opens and hydraulic fluid under pres
iluid under a variable pressure dependent on the speed of
an internal combustion engine to be controlled. The in 65 sure is supplied to the pressure chamber 32 where it estab- Y
ternal combustion engine includes the usual air intake
passage 12 associated with a carburetor for supplying fuel
and having a throttle 14 associated therewith. The
lishes a force against the flexible diaphragm 22 tending
to close the governor throttle plate 14. A continuous liow
of fluid takes place through the pressure chamber 312, this
flow being restricted by the restriction 82 to maintain the
throttle 14 in the figure is shown in open position and is
pressure within the chamber 32 at a value dependent upon
70
mounted for pivotal movement about a pivot support 16
the pressure developed by rotation of the impeller 44. _
and is provided with an operating arm j18 to which is
Accordingly, Abelow a predetermined engine speed, no
apesar?
3
pressure acts on the flexible diaphragm 22 and the throttle
plate 14 remains in full open position. However, at some
predetermined engine speed, the valve 72 opens and
hydraulic fluid under pressure is admitted to the pressure
chamber 32. The pressure within the pressure chamber
32 is dependent upon the pressure developed by the im
peller 44 and the amount of opening of the valve 72.
A
Operation
As the engine speed increases the shaft 46 or 116,
which is driven at some constant ratio to the engine
speed, rotates the impeller 44 or 114. This in turn causes
the pressure of the tiuid in the chamber 42 or 112 to
increase and this pressure is transmitted to the chamber
66 or 130. When the engine has reached sufficient speed
and the pressure reaches some predetermined correspond
ing value the spring 68 or 142 will be overcome by the
The valve 72 may move from fully closed to fully open
position upon a very small change in pressure in the pres
sure chamber 66. The movement of the governor 10 pressure on the diaphragm 64 or 128.
throttle plate 14 is controlled by pressure in the chamber
32 overcoming the effect of the spring 36 and accordingly,
the throttle plate 14 may move from fully open to fully
closed position with an extremely small r.p.m. spread.
When this con
dition is reached the valve 72 or 140 opens and hydraulic
huid under pressure then ílows to the chamber 32. As
the hydraulic ñuid reaches a point of critical Ílow through
the restriction 82 or 146, pressure will correspondingly
At the same time, the valve 72 has the elîect of prevent 15 increase in the chamber 42 with an increase in engine
ing a throttling action on the gear throttle plate 14 at
speed. As the pressure continues to increase the dia
speeds below the predetermined governed speed.
phragm 22 will be moved to the left as seen in FIGURE
Referring now to FIGURE 2, there is illustrated a
l, against spring 36, and rotate the governor throttle
modiñcation of the valve which prevents supply of fluid
plate 14 so as to limit the intake of combustible mixture
from the unit at speeds below a predetermined minimum 20 by the engine.
speed.
In this figure there is illustrated a cylindrical
The drawing and the foregoing specification constitute
chamber 90 one end of which is vented to atmosphere as
a description of the improved engine governor actuator
indicated at 92 and which contains a compression spring
in such full, clear, concise and exact terms as to enable
94 engaging one end of a piston 96 movable longitudinally
any person skilled in the art to practice the invention,
25
of the chamber. Connected to the chamber is a passage
the scope of which is indicated by the appended claims.
9S corresponding to the passage 76 of FIGURE 1, and
What I claim as my invention is:
adapted to receive ñuid under pressure from a pumping
1. An engine speed governor for an internal combus
chamber corresponding to the pumping chamber 42. At
tion engine having a movable speed control member, a
one side of the cylinder 90 is a port 160 to which is
hydraulic fluid motor comprising an operating pressure
connected a fluid supply passage 162 corresponding to 30 chamber having a movable wall, actuating means connect
the passage 78 shown in FIGURE 1. It will be observed
ed to said wall and adapted to move said speed control
that the piston 96 operates as a valve in conjunction
member in a speed reducing direction upon admission of
with the port 100. Thus, as pressure supplied through
pressure ñuid to said chamber, a hydraulic pump adapted
the lpassage 98 builds up the piston is moved upwardly
to be driven at a speed dependent on engine speed and to
35
against the spring 94 until the port 100 is uncovered and
develop a pressure dependent on engine speed, said pump
thereafter, hydraulic fluid under pressure is supplied to
having a single outlet port, a supply passage connecting
the speed control unit.
the outlet port of said pump to said chamber to deliver
Referring now to FIGURE 3 there is illustrated a
the entire output of said pump to said chamber, a nor
construction in which a separate return conduit such as
mally closed pressure responsive valve in said passage,
shown at 80 in FIGURE 1 is eliminated. In this em 40 said valve having means responsive to the pressure of
bodiment of the invention the unit is self-contained and
hydraulic ñuid developed by said pump operable to open
includes a ñrst housing member 110 having a pumping
said valve at a ñuid pressure corresponding to a predeter
chamber 112 therein in which is mounted a rotary impeller
mined engine speed, said passage being relatively unre
114 connected to a shaft 116 which in turn is adapted to
stricted, and a relatively restricted exhaust passage con
be connected to a rotating part of the engine such for 45 nected to said pressure chamber of the motor.
example as its cam shaft. A ñuid supply passage 118 is
2. An engine speed governor for an internal com»
provided which communicates with the axially extending
passage 120 in the shaft 116, the latter in turn com
bustion engine having a movable speed control member,
a hydraulic ñuid motor comprising an operating pressure
municating with the radially extending passages 122 in
chamber having a movable wall, actuating means con
the impeller. The unit includes a second housing assembly 50 nected to said wall and adapted to move said speed con
124 connected to the first member 110 and having a
trol member in a speed reducing direction upon admis
sion of pressure ñuid to said chamber, a hydraulic pump
into a pressure chamber 130 and a second chamber 132
adapted to be driven at a speed dependent on engine
vented to atmosphere as indicated at 134. The chambers
speed and to develop a pressure dependent on engine
112 and 126 are connected by a passage 136 to deliver 55 speed, said pump having a single outlet port, a nor
fluid from the chamber 112 to the pressure chamber 126.
mally closed valve having a pressure chamber, a valve
The chamber 126 is provided with a passage 138 which
element controlling discharge of fluid from said pres
leads to the speed control mechanism. Carried by the
sure chamber, a resilient means operatively connected to
flexible diaphragm 128 is a valve 140 adapted to prevent
said valve element and urging said valve element toward
delivery of hydraulic ñuid under pressure to the passage 60 closed position, a substantially unrestricted passage con»
138 until pressure within the chamber 13€) reaches a
necting the outlet port of said pump to said pressure
predetermined minimum value as determined by a com
chamber of said valve to deliver the entire output of said
pump to said chamber of said Valve and effective to main
pression spring 142 contained in the chamber 132.
tain the pressure of ñuid in said valve pressure chamber
Formed within the housing members 110 and 124 is a
passage 144 extending from the outlet passage 133 to the 65 substantially at pump discharge pressure, a passage con~
necting the pressure chamber' of said valve and the oper
inlet passage 118. The passage 144 is provided with a
ating pressure chamber of said fluid motor to deliver the
restriction 146 to establish a critical point of flow. It
entire output of said pump to said motor when said valve
will of course be appreciated that the passage 144 and
restriction 146 correspond functionally to the external 70 is open, and a relatively restricted exhaust passage con
nected to said operating pressure chamber.
passage or conduit 86 and its restriction 82.
3. An engine speed governor for an internal comb
The unit illustrated in FIGURE 3 is thus adapted to
bustion engine having a movable speed control member,
provide a supply of hydraulic fluid under a pressure which
a hydraulic ñuid motor comprising an operating pressure
is determined by engine speed whenever the engine speed
is at or above a predetermined minimum speed.
75 chamber having a movable wall, actuating means con
chamber 126 therein divided by a ñexible diaphragm 128
3,028,847
6
nected to said wall and adapted to move said speed con
trol member in a speed reducing direction upon admis
sion of pressure ñuid to said chamber, a hydraulic pump
adapted to be driven at a speed dependent on engine
speed and to deliver hydraulic fluid at a pressure depend
ent on engine speed, a normally closed valve having a
turn passage is located within said housing and connects
a portion of the supply passage downstream from and
adjacent said valve to the pump inlet passage.
6. An engine speed governor for an internal combus
tion engine having a movable speed control member, a
hydraulic ñuid motor comprising an operating pressure '
pressure chamber, a valve element controlling discharge
chamber having a movable Wall, actuating means con
of fluid from said pressure chamber, resilient means op
nected to said wall and adapted to move said speed con- '
eratively connected to said valve element and urging said
trol member in a speed reducing direction upon attain
valve element toward closed position, said pump having 10 ment of a predetermined pressure in said operating pres
«il
a single outlet port, a substantially unrestricted passage
sure chamber, a centrifugal hydraulic pump adapted to
connecting the outlet port of said pump to said pressure
be driven at a speed dependent on engine speed and to
chamber of said valve to deliver the entire output of said
develop a pressure dependent On engine speed, said pump
pump to said pressure chamber of said valve and eiîec
having a single outlet port, a normally closed valve hav
tive to maintain the pressure of fluid in said valve pres 15 ing a pressure chamber including a movable Wall sub
sure chamber substantially at pump discharge pressure,
jected at one side to hydraulic pressure Within the pres
a substantially unrestricted passage connecting said valve
sure chamber of said valve and at the other side to at
and the operating pressure chamber of said ñuid motor,
mospheric pressure, resilient means connected to said
and a relatively restricted exhaust passage connected to
Wall to bias said wall in a direction opposing movement
said operating pressure chamber.
,
induced by an increase in pressure Within the pressure
4. A hydraulic engine speed governor for an internal
chamber of said valve, the pressure chamber of said valve
combustion engine having a movablespeed control mem
having a single inlet port and a single outlet port, a valve
ber, a hydraulic motor connected to said member and
element connected to said movable wall controlling the '
operable when supplied with hydraulic ñuid under pres
single outlet port of the pressure chamber of said valve
sure to move said member in speed reducing direction, a. 25 and movable in opening direction upon attainment of a
housing having a pump chamber therein, an inlet passage
predetermined pressure Within the pressure chamber of
connected to said pump chamber, a centrifugal pump
said valve, a substantially unrestricted passage connect
rotor in said chamber, means for connecting said rotor
ing the single outlet port of said pump to the single inlet
to the engine for rotation thereby at a speed dependent
port of the pressure chamber of said valve, a substantially
on engine speed to maintain hydraulic fluid in said pump 30 unrestricted passage connecting the single outlet port of
chamber at a pressure dependent on engine speed, a valve
the pressure chamber of said valve to the operating pres
chamber in said housing having a movable Wall therein,
sure chamber of said motor, and a restricted exhaust pas
said pump having a single outlet port, a substantially un
sage connected to the operating pressure chamber of said
restricted pump outlet passage connecting said pump
outlet port and said valve chamber for delivery of the 35
References Cited in the iile of this patent
entire output of said pump to said valve chamber, a valve
port in said valve chamber, a valve connected t0 said
UNITED STATES PATENTS
movable Wall for actuation thereby, resilient means urg
1,902,340
.Schmidt _____________ __ Mar, 21, 1933
ing said valve to closed position and yieldable to open
2,359,231
Mallory _____________ __ Sept. 26, 1944
said valve upon development of a predetermined ele
2,450,199
Liebing _____________ __ Sept. 28, 1948
vated pressure of hydraulic fluid in said valve chamber,
2,517,501
Mennesson ___________ __ Aug. 1, 1950
an unrestricted supply passage connecting said valve
chamber to said motor, and a restricted return passage
FOREiGN PATENTS
motor.
v
`
located downstream from said valve to establish a critical
ilow point and to provide for delivery of hydraulic fluid 45
to said motor when said valve is opened at pressure sub
stantially equal to the pressure in said pump chamber and
said valve chamber.
'
5. A governor as deñned in claim 4 in which said re
388,129
497,900
795,372
58,297
Great Britain _________ __ Feb. 23,
Great Britain _________ __ Dec. 30,
France _______________ __ Jan. 6,
France ______________ __ June 17,
(Addition to No. 941,544)
1933
1938
1936
1953
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