close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2121666

код для вставки
June 21, 1938.
D, w_ LATTA
2,121,666
GOVERNOR CONTROLLED, COMPRESSION IGNITION
INTERNAL COMBUSTION INJECTION ENGINE
Filed 001:. 23, 1936
I‘
57 '
50
Q52
\
—_>_1|\
63
f
.19
-
a Q
0
~-
1
0
°
.
0 Q
j
20
‘Q
"15 ~79
/24 n 17
“I”
‘
L22
l5
-
—
l2
56
55
‘ ‘22\
I
[j
/
" ~° ‘
2,121,666
Patent-ed June 21,1938
1
PATENT oFricE
1 UNITED STATES
' 2,121,666
GOVERNOR CONTROLLED
COMPRESSION
IGNITION INTERNAL COMBUSTION IN
JECTION ENGINE
David Wilson ‘Latte, Canton, Ohio, as‘slgnor to
Hercules Motors Corporation, Canton, Ohio, a
‘corporation of Ohio
Application October 23, 1936, Serial No. 107,198
5 Claims.
(Cl. 123-140)
My invention relates to compression ignition in
ternal combustion injection engines, such as set
forth in ‘U. S. Reissue Letters Patent No. 19,742.
‘
The fuel supply means for such‘ an engine in—
5 cludes a fuel injection pump which successively
injects separate quantities or charges of‘ liquid
hydrocarbon fuel such as Diesel oil into the com
bustion chambers of the , engine at successive
timed intervals, one charge being injected into
the combustion chamber of each cylinder during
each four stroke cycle of the piston operating in
the cylinder, and in which the air for combustion
is introduced into the cylinders and combustion
chambers through an air. intake manifold or duct
15 and valve means such as may be usual in internal
combustion engines.
The tendency to overspeed is always present in
20_
a compression ignition internal combustion in
jection engine, and one- form of governor means
for the fuel injection pump of such an engine
which is frequently used is a'vacuum type gover
nor which is actuated by changes in pressure in
a venturi located in' the air intake manifold, the
changes in pressure being communicated to the
25 governor through a ?exible tubing.
'
In such a governor controlled compression ig
nition internal combustion injection engine,
which maybe for example used as the motive
power of a truck, upon a sudden release of the
30 load on the engine,‘ as' when the truck climbs a
steep hill and passes over the top of the hill, the
usual forms of vacuum governors are frequently
too sluggish in action, with the result that serious
overspeeding of the engine occurs and the truck
35 may run away‘and get out of control of the driver
_with the‘possible result of a serious and damaging
collision, or overturning of the truck upon leav
ing the road out of control.
~
. The objects of the present improvements in
40 clude the provision of a governor controlled com
pointed out and set forth in the appended claims
forming part hereof.
The nature of the present invention maybe '
described in general terms as including in a com
pression ignition internal combustion injection.
engine, air intake duct means or an intake mani
fold for the engine, fuel injection pump means
for the engine, a vacuum type governor which
may be termed a 'di?erential pressure diaphragm
actuated means controlling the rate of fuel injec 10
tion of the pump means, preferably a venturi in
the air intake duct means, tube means operatively
associated preferably with the venturi in the ‘air
intake duct means and the diiferential pressure
diaphragm actuated means for actuating the dia 15
phragm means according to variations in pressure
vin they air intake duct means.
The speed of the engine is controlled by a. '
manually operable valve means for varying the >
air intake opening of the air intake duct. means,
20'
which manually operable valve means may be a
usual butter?y valve which may be located in the
venturi of the intake duct means.
Preferably in advance of the manually operable
valve means, with respect to the direction of air 25
flow through the air intake duct means, air ve- ‘
locity actuated valve means, preferably vane
valve means, are located in the air intake duct
means, and normally arranged to permit air ?ow
through the air intake duct means and operative 30
to automatically reduce the air ?ow by the at
tainment of a predetermined velocity of air ?ow,
so as to prevent overspeeding of the engine, as
when the load on the engine is suddenly released.
By way of example, a compression ignition in-_
ternal combustion injection engine including the
present improvements, is illustrated in they ac
companying drawing forming part hereof, in
which
'
Figure 1 is a slde'perspective view of. the fuel
pump and air intake side of the compression ig
pression ignition internal combustion injection
engine, and which may have a vacuum type gov?
nition internal combustion injection engine in
by the improvements, apparatus, parts, combina
the present improvements; and
cluding the present improvements;
'
ernor, and which is provided with additional gov
erning means which are operative substantially ‘ Fig. 2, an enlarged fragmentary elevation view
45 instantaneously with a sudden release of load on of the same side thereof, with portions of the air 45
the engine to e?ectively reduce the fuel supply intake duct means and associated parts and por
tions of the fuel supply means broken away and
and thus the speed of the engine.
The foregoing and other objects are attained illustrated in section for more clearly illustrating
50 tions, and sub-combinations, which comprise the
present invention, and the nature of which is set
forth in the following general statement, and pre
ferred embodiments of which, together with their
mode of use are set forth in the following descrip ,
55 tion, and which are particularly and distinctly
Fig. 3, a fragmentary elevation view of portions
of Fig. 1 showing one form of velocity actuated
vane valve or governor means adapted for use in _
the present improvements, with the‘ cover plate
thereof removed and with portions being illus
trated‘in section.
55
2
Similar
2,121,666
parts
throughout the drawing. _
numerals
refer
to
similar
a transfer or supply pump 2| attached to the side
of the lower part of the casing i1, and one or
The compression ignition internal combustion
injection engine including among others the pres
more fuel ?lters, not shown, may be interposed
in the fuel supply line to the injection pump M.
ent improvements is indicated generally at ill,
and as illustrated is a six cylinder, four stroke
vided with a vacuum or differential pressure
cycle, single action, high speed, compression ig
nition internal combustion injection‘ engine, in
which the air for combustion is obtained normally
10 directly from the atmosphere, and in which sep
arate quantities or charges of the preferred liquid
hydrocarbon fuel, suchas Diesel oil, are succes
sively injected into the combustion chambers of
the engine at successive timed intervals, one
15 charge being injected into the combustion cham
ber of each cylinder during each four stroke cycle
of the piston operating in the cylinder.v
The illustrated engine includes the improve
ments in Compression ignition internal combus
20 tion engines set forth in the United States re
issue patent of 0. D. Treiber, 19,742, relating
more particularly to an improved and preferred
arrangement of’ cylinder chambers, side com
bustion chambers, and connecting passageways,
-25 and a preferred character of fuel jet injected.
into each side combustion chamber, which need
not be described more in detail ‘herein.
The engine l0 furthermore includes air intake
duct means indicated generally. by H through
The injection pump it as illustrated is pro
governor means indicated generally by 22, and
which as shown is of a usual type, and which
may be termed differential pressure diaphragm
actuated means controlling the rate of fuel in 10
Jection of the pump I! through the tubes i9
and the fuel nozzles into the combustion cham
bers of the engine.
-
'
In effecting control of the rate of fuel injec
tion of the pump 14 by means of the differential 16
pressure governor means 22, the fuel pump in
cludes valve or variable metering means for each -
fuel pump cylinder controlling the quantity of I
liquid fuel admitted to each pump cylinder from
the main supply tube, and thus controlling the 20
quantity of fuel in each charge pumped out of;
each pump cylinder into its associated engine
cylinder combustion chamber, on the pressure .;
stroke of the piston of the pump cylinder.
_
The fuel pump it furthermore includes a valve
setting or throttle rod 23 which ‘is operatively
associated with each of- the valve means for
each of the pump cylinders and which is arranged
for reciprocation in normal horizontal opposite
30 which‘the air supply for the engine is introduced . directions in the casing ll of the pump H.
and caused to ?ow into thev cylinder chambers
through overhead valve means, not shown, but
The rod 23 when displaced to its extreme posi
tion in the direction of the arrow S in Fig. 2
I which are included beneath the air intake valve
actuates’ the valve means so as to shut off the
mechanism cover‘ i2, and which overhead valve
?ow of liquid fuel into the pump cylinders and
35 means may be as set forthin said U. S. Reissue
Patent 19,742.
thus stop the engine.
,
For thus stopping the engine a stop lever 24 is
'
The engine i0 furthermore includes fuel sup
ply means indicated generally by l3 and which
operatively associated with the rod 23.
includes a fuel injection pump is operatively
mounted at one side of the engine as shown in
the arrow F actuates the pump valve means to
Figs. land 2.
I
The illustrated fuel injection pump l4 ‘isof
usual construction and arrangement, and is a
Bosch fuel injection, pump, made by Robert
Bosch, A. G., Stuttgart, Germany, and includes
a shaft l5, driven by a chain ,and sprocket con
nection with the ‘cam shaft of the engine con
tained in a gear and chain housing ii of the
engine.
1
Y
The gearing and sprocket connection with the
as
'
Displacement of the rod 23 in the direction of
increase the rate of flow of liquid fuel into the 40
pump cylinders, the greater the displacement of
the rod 23 in the direction of the arrow F, the
greater the rate of flow of liquid fuel into the
pump cylinders.
The vacuum or di?erential pressure governor 46
means 22 includes a casing indicated generally
by 25 and having mounted therein intermediate
the ends thereof diaphragm means 26 for form
ing at one side of the diaphragm means 26 a
diaphragm chamber 21 and at the other side
engine cam shaft of the fuel injection pump drive ' of the diaphragm means 23 a diaphragm cham
shaft I5 is not shown and may be of usual con
ber 23.
.
struction and arrangement, and the cam shaft
The diaphragm means 26 is connected by link
,of'the engine is driven in a usual manner, not means 29 with the governor control rod 23 and
shown, by a gear connection with the crank shaft accordingly movements of the diaphragm means 56
of the engine.
,
.
.
' 26 caused by pressure differences in'the chambers
The fuel injection pump i4 includes a casing 21 and 28, impart movements to the control rod
I‘! in which plunger pistons, not shown, are oper
23 in the opposite directions S and F.
atively mounted, each in a pump cylinder, not
The. diaphragm chamber 28 is vented to the.
shown, formed in the casing l1, one pump plunger atmosphere, and the diaphragm chamber 21 com 60
piston and cylinder being provided for each cyl
municates through tubing means 30 with the al
inder of the engine.
The plunger pistons are actuated in a ‘usual
manner by cams on a cam shaft portion, not
shown, of the shaft ii, the cam shaft portion
being located within a cam shaft chamber of th
casing l'l.
'
Each pump cylinder communicates with a
discharge outlet i8 which communicatingly con
70 nects with one end of a tube I9, the other end
of which communicatingly connects with the in
take ?tting 20 of a. pintle nozzle discharging. into
the combustion chamber of one of the engine
cylinders.
75
‘
The injection pump it as :hown is served by
intake duct means ll.
"
As best shown in Fig. 2, the air intake duct
means ll of the engine preferably includes a
Venturi tube portion 3i located between the pre 65
ferred air cleaner entrance means 32 of the en
glue and the manifolding'portion 33 of the air
intake duct means II. which distributes the air
to the several cylinders through valve means in
a usual manner.
.
,
70
The tubing means 30 communicates with the air
intake duct means at the neck of the Venturi tube‘
portion 3i.
’
Manually operable valve means for varying the
air-intake opening of the air intake duct means 75
,
9,121,660
are provided as shown in the form. of a butter
?y valve 3i operatively located in ‘the Venturi
tube portion 3!, and the butter?y valve 34 is ro
'
3
It is to be noted that the location of the air
velocity actuated vane valve means 31 in advance
of the butter?y valve means, with respect to the
tatable on its shaft 35 by means of the speed direction of the air ?ow through the air intake '
duct means, insures the desired very rapid drop
changing lever 36 as shown in _Fig. 1.
For the purposes of the present improvements, in pressure in the Venturi tube portion 3| so as
air velocity actuated valve means are interposed to eifect a rapid-rand immediate slowing down
“in the air intake duct means I I of the engine and movement of the diaphragm means 26 and the
injection pump control rod 23.
indicated generally at 31.
.
The illustrated air velocity actuated vane valve
means in are such as set forth in U. S. Patent
No. 2,026,948, issued to W. E. 'Leibing, and in
clude a duct casing 38 which is interposed be
tween the Venturi tube portion 3! of the air in
is, take duct means H and the air cleaner 32.
Valve vanes 33 are operatively located in the
duct opening 40 of the duct casing." which‘
forms a portion of the air intake duct means of
the engine.
20
,
I
engine, differential pressure diaphragm actuated
means controlling the rate of fuel injection of the 15
pump means, tube means operatively associated
with the ‘air intake duct means and the di?eren
tial pressure diaphragm‘ actuated means for actu
ating the diaphragm means according to varia
mally and adjustably maintained by the spring
manually operable valve- means for varying the
means indicated generally by ll in Fig. 3. in the
position shown in full lines in Fig. 2, which posi
tion normally permits air flow through the air
air intake opening of the air intake duct means,
and air velocity actuated valve means normally
-
At the attainment of a predetermined velocity,
the valve vanes 39 actuated by 'the increased ve
locity "assume the position shown in dotted lines
in Fig. 2, thus automatically reducing and clos
30 ing c? the air ?ow through the air intake duct
means ii.
,40
-
1. In a compression ignition internal combus
tion injection engine, air intake duct means for
the engine, fuel injection pump means for the
The velocity actuated valve vanes 38 are nor-- ~ tions in pressure in the air intake duct means,
25 intake duct means of the engine.
as
I claim:
arranged to permit air ?ow through the air in
take duct means and operative to automatically
reduce theair ?ow by the attainment of a pre
determined velocity of air ?ow, so as to prevent
overspeeding of the engine, as when the load on
_ the engine is suddenly released.
' 2. In a compression ignition internal combus
tion injection engine, air intakeduct means for
In Fig. 2 the setting of the manually operated , the engine, fuel injection pumpmeans for the en
butter?y valve 34 is for full load speed of the. en- ' gine,. di?erential pressure diaphragm actuated
gine as when the engine is propelling a truck means controlling the rate of fuel injection of the
pump means, tube'means communicatingly con
which is climbing a .hill.‘
'
~
The diaphragm means 218 assumes the position necting at one end with the air intake duct means
shown in Fig. 2 corresponding to the wide open [and at the other end with the differential pres
sure diaphragm actuated means for actuating the
setting of the butter?y valve 34, and manual clos
diaphragm means according to variations in pres
ing of the butter?y valve means 35 is accom
panied by increases in vacuum at the neck of the sure in the air intake duct means, manually op
Venturi tube 3i and such increases in vacuum or
erable valve _means for varying the air intake
drops in pressure are communicated through the ' opening of the air intake duct means, and air
velocity actuated valve means operative in the air
diaphragm casing 27 through the tubing 30 re
ducing the speed of the engine by the diaphragm intake duct means in advance of the connection
with respect to the direction of air ?ow there
shown in Fig. 2.
through.
.
'
The governor 22 connects as aforesaid by the
tubing 3!} with the‘venturi tube portion 8!, and
50
or the tube means with the air intake duct means
means 26 assuming a position displaced in the
direction of the arrow 8 from its position as
with not too sudden changes in speed of the en
gine, also has a governing action on the dia
phragm means 26 tending to maintain the same
at any position correspondingto any particular
setting of the butter?y valve 3d.
This governing action is too sluggish whenthe
55
load on the ermine is suddenly released as when
a truck powered by the engine goes over the top
of a steep hill.
-
,
In the present improvements however, the ve
locity actuated vane valve means 3? are adjusted
to instantaneously operate upon a sudden release
of the load of the engine to reduce andv close o?.
the air ?ow through the air‘ intake duct means
ii, and accordingly the pumping action of the
engine pistons causes a-very rapid ‘drop in pres
65
sure in the air intake duct means beyond the air
velocity actuated vane valve means 8'? in the di
rection of the air flow indicated by the arrow £32,
with a consequent quick movement, of the dia
70 phragm means 25 in the direction of the arrow
S to slow down the engine speed to a safe operat
ing speed, after which the valve vanes 39 auto
matically operate torreturn to the position shown
in Fig. 2 fol-permitting the manual speed control
75 of ~the engine by the butter?y valve means 343.
‘
1
3. In a compression ignition internal combus
tion injection‘ engine, air intake duct means for
the engine, fuel injection supply means for the
engine, means operative by pressure changes in
the air intake duct means for controlling the op
eration of the fuel supply means, manually op
erabie valve means for varyingthe air intake
opening of the air intake duct means, and air ve
locity actuated valve means operative in the air
intake duct means.
'
1i. In a compression ignition internal combus
tion injection engine, air intake duct means for
the engine, fuel injection supply means for the
engine, di?'erential pressure diaphragm actuated
means controlling the operation of the fuel sup- '
ply means, tube means communicatingly connect- ‘
ing at one end with the‘ air intake duct means
and at the other end with the di?erential pres
$5
sure diaphragm actuated means for actuating the
diaphragm means according to variations in
pressure in the air intake duct means, manually
operable valve means for-varying the air intake
opening of the air intake duct means,- and air ve
70
locity actuated valve'means operative in the air
intake duct means in advance of the connection
of the tube means with the air intake dust means
with respect to the direction of A air ?ow there
through.
as
4-
2,121,066
b. In a compression ignition internal combus
tion injection engine, air intake duct means for
the engine, differential pressure diaphragm ac
ated means, and air velocity actuated valve means
tuated means, tube means communicatingly con
voperative in the air intake duct means in advance
of the connection of the tube means‘ with the air
intake duct means with respect to the direction
necting at one end with the‘ air intake duct means
of air flow therethrough.
and communicatingiy connecting at the other end
with the differential pressure diaphragm actu
DAVID WILSON LA'I‘TA.
Документ
Категория
Без категории
Просмотров
0
Размер файла
640 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа