JP2011069237A - Diesel engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diesel engine supplying engine oil to an injection pump holding case while using an electronic governor. <P>SOLUTION: An actuator 8 of the electronic governor is mounted on an oil reservoir case end wall 4b opposing to a bulkhead 17. When an output rod 8b projects toward a fuel metering part 10 of a fuel injection pump 2 through an inside of the oil reservoir case 4 from a rod insertion through hole 8a of the actuator 8, an oil splashing means 5 is composed of plate material oil splashing blades 67 attached to a fuel injection camshaft 3, an eaves 9 is led out toward the oil reservoir case end wall 4b from the bulkhead 17 under the output rod 8b of the actuator 8, and the oil splashing means 5 is held at a position closer to the bulkhead 17 than a led out end edge 9a of the eaves 9 right below under the eaves 9. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a diesel engine, and more particularly to a diesel engine that can supply engine oil to an injection pump housing case while using an electronic governor.

  As a conventional diesel engine, a fuel injection pump is accommodated in an injection pump housing case, a fuel injection camshaft is installed below the fuel injection pump, and an end of the injection pump housing case is attached to a timing transmission gear case. A fuel injection cam gear is attached to an end portion of the injection cam shaft, the fuel injection cam gear is accommodated in a timing transmission gear case, and an oil reservoir case is provided at the other end portion of the injection pump housing case. This oil reservoir case (4) An oil sump is provided at the inner bottom of the oil pan, the engine oil of the oil pan is supplied to the oil sump by the pumping force of the oil pump, and an oil jumping means is attached to the end of the fuel injection cam shaft in the oil sump case, This oil splashing means is immersed in the engine oil in the oil reservoir, and the injection pump housing case and the oil reservoir case The oil supply hole is provided in the partition wall, and the engine oil splashed by the oil splashing means that rotates together with the fuel injection camshaft is supplied from the oil supply hole to the injection pump housing case, and the engine oil in the oil pan is supplied to the oil pump After flowing into the inner bottom portion of the injection pump housing case with the pumping force of the pump, it flows into the timing transmission gear case via the oil outlet of the injection pump housing case and returns to the oil pan (for example, patent Reference 1).

This conventional diesel engine has an advantage that the fuel injection cam of the fuel injection cam shaft is lubricated by the engine oil flowing into the inner bottom portion of the injection pump housing case.
However, the conventional diesel engine has a problem because the oil splashing means is composed of a governor weight.

Japanese Unexamined Patent Publication No. 2000-104592 (see FIG. 1)

The above prior art has the following problems.
<< Problem >> When an electronic governor is used, engine oil cannot be supplied to the injection pump housing case.
When the electronic governor is used, the governor weight, which is the oil splashing means, is eliminated, so that engine oil cannot be supplied to the injection pump housing case.

  This invention makes it a subject to provide the diesel engine which can supply engine oil to an injection pump accommodation case, using the diesel engine which can solve the said problem, ie, an electronic governor.

Invention specific matters of the invention according to claim 1 are as follows.
As illustrated in FIG. 1, a fuel injection pump (2) is stored in an injection pump storage case (1), and a fuel injection camshaft (3) is installed below the fuel injection pump (2) to store the injection pump. The end of the case (1) is attached to the timing transmission gear case (11), the fuel injection cam gear (12) is attached to the end of the fuel injection cam shaft (3), and the fuel injection cam gear (12) is timed. Housed in the transmission gear case (11),
An oil reservoir case (4) is provided at the other end of the injection pump housing case (1), an oil reservoir (4a) is provided at the inner bottom of the oil reservoir case (4), and the engine oil of the oil pan (13) is provided. (14) is supplied to the oil sump (4a) by the pumping force of the oil pump (15),
In the oil sump case (4), an oil splashing means (5) is attached to the end of the fuel injection camshaft (3), and this oil splashing means (5) is used as the engine oil (14) in the oil sump (4a). The oil supply hole (64) is provided in the partition wall (17) between the injection pump housing case (1) and the oil reservoir case (4), and the oil splash that rotates with the fuel injection camshaft (3). The engine oil (14) bounced up by the raising means (5) is supplied from the oil supply hole (64) to the injection pump housing case (1) and flows into the inner bottom portion of the injection pump housing case (1). In the diesel engine, which flows into the timing transmission gear case (11) through the oil outflow passage (20) of the pump housing case (1) and returns to the oil pan (13),
An actuator (8) of an electronic governor is attached to the oil reservoir case end wall (4b) facing the partition wall (17), and the rod insertion hole (8a) of this actuator (8) is passed through the oil reservoir case (4). When the output rod (8b) protrudes toward the fuel metering section (10) of the fuel injection pump (2),
The oil splashing means (5) is composed of a plate-like oil splashing blade (67) attached to the fuel injection camshaft (3),
Below the output rod (8b) of the actuator (8), a gutter (9) is led out from the partition wall (17) toward the oil sump case end wall (4b). A diesel engine characterized in that the oil splashing means (5) is housed in a position closer to the partition wall (17) than the leading edge (9a) of 9).

(Invention according to Claim 1)
<Effect> Engine oil can be supplied to the injection pump housing case while using the electronic governor.
As illustrated in FIG. 1, since the oil jumping means (5) is composed of a plate oil jumping blade (67) attached to the fuel injection camshaft (3), the injection is performed while using an electronic governor. Engine oil (14) can be supplied to the pump housing case (1).

<Effect> It is possible to suppress the ingress of engine oil from the rod insertion hole of the actuator of the electronic governor.
As illustrated in FIG. 1, under the output rod (8 b) of the actuator (8), a ridge (9) is led out from the partition wall (17) toward the oil sump case end wall (4 b). ), The oil splashing means (5) is housed in the position closer to the partition wall (17) than the leading edge (9a) of the flange (9). Most of the engine oil (14) splashed up is blocked by the hook (9) and is difficult to approach the output rod (8b) of the actuator (8), and the engine from the rod insertion hole (8a) of the actuator (8) of the electronic governor The entry of oil (14) can be suppressed.

(Invention according to Claim 2)
In addition to the effect of the invention according to claim 1, the following effect is achieved.
<Effect> The oil splashing means can be configured at low cost.
As illustrated in FIG. 8 (A), the oil splashing means (5) has an oil splashing hole (68a) formed in the peripheral portion of a disc (68) attached to the fuel injection camshaft (3). Therefore, the oil splashing means (5) can be constructed at a low cost.

(Invention according to claim 3)
In addition to the effect of the invention according to claim 1, the following effect is achieved.
<Effect> The oil splashing means can be configured at low cost.
As illustrated in FIG. 8B, the oil splashing means (5) has notches provided at predetermined intervals in the circumferential direction of the peripheral edge of the disc (69) attached to the fuel injection camshaft (3). Since it is composed of the oil splashing protrusion (69b) formed between (69a), the oil splashing means (5) can be constructed at low cost.

(Invention of Claim 4)
In addition to the effects of the invention according to any one of claims 1 to 3, the following effects are provided.
<Effect> Engine oil is prevented from entering the feed pump chamber.
As illustrated in FIG. 3, the protrusion (58) formed at the boundary between the inner bottom portion of the injection pump housing case (1) and the rocker arm insertion passage (54) is removed by a lateral oil passage groove (59). Therefore, even if the engine oil (14) at the inner bottom portion of the injection pump housing case (1) enters the pump interlocking portion housing passage (52), the engine oil (14) remains in the injection pump housing case (1). The engine oil (14) is prevented from entering the feed pump chamber (51) immediately returning to the inner bottom.

  When the ridge (58) is not thinned by the lateral oil passage groove (59), the engine oil (14) in the inner bottom portion of the injection pump housing case (1) is housed in the pump interlocking portion by the vibration of the engine. When entering the passage (52), it is difficult to return to the inner bottom of the injection pump housing case (1), the oil level of the engine oil (14) in the pump interlocking portion housing passage (52) rises, and the engine oil (14) feeds. There is a problem of entering the pump chamber (51), but when the ridge (58) is thinned by the lateral oil passage groove (59), the engine oil (14 ) Immediately returns to the inner bottom of the injection pump housing case (1), and such a problem does not occur. It is presumed that the lateral oil passage groove (59) helps return the engine oil (14) from the pump interlocking portion accommodating passage (52) to the inner bottom portion of the injection pump accommodating case (1).

(Invention according to claim 5)
In addition to the effect of the invention according to claim 4, the following effect is achieved.
<Effect> It is possible to easily form the oil outflow passage and communicate with the inner bottom portion of the injection pump housing case.
As illustrated in FIGS. 1 and 3, the oil outlet passage (20) of the injection pump housing case (1) extends from the end wall (23) of the injection pump housing case (1) to the inner bottom surface of the injection pump housing case (1). An oil outflow hole (20a) is provided in the bottom wall (28) of the injection pump case (1) by a drilling process that advances straight along, and the oil outflow hole (20a) is provided in the injection pump housing case (1). Since it communicates with the inner bottom portion of the injection pump housing case (1) via the lateral oil passage groove (59) provided in the bottom wall (28) of the oil tank, the formation of the oil outflow passage (20) and the injection pump housing Communication with the inner bottom of the case (1) can be easily performed.

(Invention of Claim 6)
In addition to the effect of the invention according to claim 5, the following effect is achieved.
<Effect> Even when the engine is tilted left and right, the ingress of engine oil into the fuel injection pump is suppressed.
As illustrated in FIGS. 1 and 3, the oil outlet passage (20) of the injection pump housing case (1) includes a second oil outlet hole (20b) arranged side by side with the oil outlet hole (20a). The second oil outflow hole (20b) is formed by a drilling process in which the second oil outflow hole (20b) advances straight along the inner bottom surface of the injection pump storage case (1) from the end wall (23) of the injection pump storage case (1). 1) provided in the bottom wall (28) of the injection pump housing case (1) from the lower of the pair of oil outflow holes (20a) and (20b) even when the engine is tilted left and right. The engine oil (14) can be discharged to the timing transmission gear case (11), and the engine oil (14) does not accumulate in a large amount in the injection pump housing case (1). For this reason, the fuel injection cam (34) is not deeply immersed in the engine oil (14), and the entry of the engine oil (14) into the fuel injection pump (2) due to the lifting of the engine oil (14) of this cam is suppressed. Is done.

<Effect> It is possible to easily form the oil outflow passage and communicate with the inner bottom portion of the injection pump housing case.
As illustrated in FIGS. 1 and 3, the oil outflow passage (20) of the injection pump housing case (1) has a second oil outflow hole (20b) arranged side by side with the oil outflow hole (20a). And the second oil outflow hole (20b) is straightened along the inner bottom surface of the injection pump housing case (1) from the end wall (23) of the injection pump housing case (1). A second oil passage groove in the lateral direction provided in the bottom wall (28) of (1) and this second oil outflow hole (20) provided in the bottom wall (28) of the injection pump housing case (1). Since it communicates with the inner bottom part of the injection pump housing case (1) via (61), the formation of the oil outflow passage (20) and the communication with the inner bottom part of the injection pump housing case (1) can be easily performed.

(Invention of Claim 7)
In addition to the effect of the invention according to claim 6, the following effect is achieved.
<Effect> It is possible to prevent the formation of a lateral oil passage groove.
As illustrated in FIG. 3, the lateral oil passage groove (59) and the second oil passage groove (61) pass through the inside of the rocker arm insertion passage (54) from the outside of the injection pump housing case (1). Since it is formed by a series of drilling of a drill that goes straight toward the inner bottom of the storage case (1), at the time of the drilling process, the tip of the drill has a second oil passage groove (61). It is necessary to let the drill enter until it hits the bottom wall (28) of the case (1), and prevents the oil passing groove (59) from making a mistake that the lateral oil passing groove (59) is not opened due to insufficient penetration of the drill. be able to.

<Effect> The number of drilling steps can be reduced.
As illustrated in FIG. 3, the lateral oil passage groove (59) and the second oil passage groove (61) pass through the inside of the rocker arm insertion passage (54) from the outside of the injection pump housing case (1). Since it is formed by a series of drilling processes that go straight toward the inner bottom of the housing case (1), the number of drilling processes can be reduced.

It is a fuel injection pump unit vertical side view used with the diesel engine concerning a 1st embodiment of the present invention. 2A is a cross-sectional view taken along the line IIA-IIA in FIG. 1, and FIG. 2B is a vertical side view of the oil splash blade. It is the III-III sectional view taken on the line of FIG. FIG. 4A is a front view and FIG. 4B is a side view for explaining an injection pump housing case used in the fuel injection pump unit of FIG. 1. It is a rear view of the injection pump storage case used with the fuel injection pump unit of FIG. 1 is a schematic plan view of a diesel engine according to an embodiment of the present invention. It is a vertical side view of the principal part when the engine of FIG. 6 inclines and descends to the front side. FIG. 8A is a front view of a modified example of the oil splashing means in FIG. 2A corresponding to FIG. 2A of the diesel engine according to the second embodiment of the present invention.

  Embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 7 are diagrams for explaining a diesel engine according to a first embodiment of the present invention. In the first embodiment, a vertical multi-cylinder diesel engine will be explained.

The outline of the first embodiment of the present invention is as follows.
As shown in FIG. 6, the cylinder head (31) is attached to the upper part of the cylinder block (30), and the timing transmission gear case (11) is attached to the front part of the cylinder block (30). The lateral end portion (31) of the timing transmission gear case (11) protrudes laterally from the lateral side surface (32) of the cylinder block (30), and fuel is placed on the rear wall (48) of the lateral end portion (31). An injection pump unit (33) is attached.

The configuration of the fuel injection pump unit is as follows.
The fuel injection pump unit (33) includes an injection pump housing case (1), an oil reservoir case (4), its internal components, and a fuel injection cam gear (12).
As shown in FIG. 1, a fuel injection pump (2) is accommodated in an injection pump housing case (1), and a fuel injection camshaft (3) is installed below the fuel injection pump (2), and an injection pump housing case. (1) An oil sump case (4) is provided on the rear end side, the front end side of the injection pump housing case (1) is attached to the timing transmission gear case (11), and the fuel injection camshaft (3) is connected to the front end side. A fuel injection cam gear (12) is attached, and the fuel injection cam gear (12) is accommodated in the timing transmission gear case (11).

  As shown in FIG. 1, the fuel injection pump (2) is a row injection pump provided with a plunger, and the fuel injection cam shaft (3) has four fuel injection cams (34) and one fuel feed cam ( 35). The rear end of the fuel injection camshaft (3) protrudes into the governor housing case (4). The fuel metering unit (10) is a fuel metering rack. The fuel injection cam gear (12) is externally fitted and fixed to the front end portion of the fuel injection cam shaft (3), and is driven from the crank gear (not shown) of the crankshaft (not shown) via the idle gear (39). The timing transmission gear train (29) including the crank gear, the idle gear (39), and the fuel injection cam gear (12) is accommodated in the timing transmission gear case (11).

As shown in FIGS. 4 (A) and 4 (B), the front end wall (23) of the injection pump housing case (1) is provided with an annular fitting portion (65), as shown in FIG. The annular fitting portion (65) is fitted into the fitting hole (66) of the rear wall (48) of the timing transmission gear case (11), and the fuel injection pump unit (33) is timed transmission with a predetermined inclination. It is fixed to the rear wall (48) of the gear case (11).
As shown in FIG. 3, the fuel injection pump unit (33) of this embodiment is tilted and fixed to the fuel feed pump (25) side.

As shown in FIG. 1, an oil reservoir case (4) is provided at the rear end of the injection pump housing case (1), and an oil reservoir (4a) is provided at the inner bottom of the oil reservoir case (4). The engine oil (14) of the pan (13) is supplied to the oil sump (4a) by the pumping force of the oil pump (15), and enters the partition wall (17) between the governor housing case (4) and the injection pump housing case (1). An oil supply hole (64) is provided, and an oil outflow passage (20) of the pump storage case (1) is provided between the injection pump storage case (1) and the timing transmission gear case (11).
As shown in FIG. 1, the engine oil (14) dropped from the governor lever (7) to the inner bottom portion of the governor housing case (4) is transferred to the oil supply hole (64) of the governor housing case (4) shown in FIG. 1 flows into the inner bottom portion of the pump housing case (1) through the inter-race gap (40a) of the rear rolling bearing (40) shown in FIG. 1, and then through the oil outflow passage (20) of the pump housing case (1). Then, it flows into the timing transmission gear case (11) and returns to the oil pan (13).

  As shown in FIG. 2, the oil supply holes (64) are provided on both sides of the rear rolling bearing (40) for bearing the fuel injection camshaft (3). Reference numeral (41) in FIG. 1 denotes a front rolling bearing for bearing the fuel injection camshaft (3). These front and rear rolling bearings (40) and (41) are all ball bearings.

As shown in FIGS. 1 and 2, an electronic governor actuator (8) is attached to the oil sump case end wall (4b) facing the partition wall (17), and the rod (8a) is inserted into the actuator (8). When the output rod (8b) protrudes toward the fuel metering section (10) of the fuel injection pump (2) through the oil sump case (4), the oil jumping means (5) It is composed of a plate-like oil spring blade (67) attached to the fuel injection camshaft (3). The oil splashing blade (67) also serves as a pressing plate for the rolling bearing (40). An inner race of the rolling bearing (40) is sandwiched between the center portion of the oil jumping blade (67) and the fuel injection cam shaft (3).
Below the output rod (8b) of the actuator (8), a gutter (9) is led out from the partition wall (17) toward the oil sump case end wall (4b). The oil splashing means (5) is housed at a position closer to the partition wall (17) than the leading edge (9a) of 9).

  As shown in FIGS. 1 and 7, when the end of the fuel injection camshaft (3) is supported by the end of the injection pump housing case (1) via a rolling bearing (41), An oil blocking wall (24) is provided along the end face of the rolling bearing (41), and the rolling bearing (41) from the injection pump housing case (1) when the engine is inclined downward toward the timing transmission gear case (11). The engine oil (14) about to flow into the timing transmission gear case (11) through the inter-race clearance (41a) is blocked by the oil blocking wall (24). For this reason, even when the engine is inclined downward toward the timing transmission gear case (11), it is possible to prevent the fuel injection cam (34) from becoming insufficiently lubricated.

  As shown in FIG. 3, a fuel feed pump for supplying fuel to the fuel injection pump (2) beside the injection pump housing case (1) when viewed in a direction parallel to the direction in which the fuel injection camshaft (3) is installed. 25) is arranged, a pump interlocking portion accommodating passage (52) is disposed below the feed pump chamber (51) of the fuel feed pump (25), and a rocker arm mounting passage (next to the pump interlocking portion accommodating passage (52)) 53) is arranged, a rocker arm insertion passage (54) of the injection pump housing case (1) is arranged beside the rocker arm attachment passage (53), and the pump interlocking portion accommodation passage (52) is injected with the rocker arm attachment passage (53). The pump housing case (1) communicates with the inner bottom portion of the injection pump housing case (1) via the rocker arm insertion passage (54).

As shown in FIG. 3, the rocker arm (55) attached to the rocker arm attachment passage (53) is inserted into the injection pump housing case (1) via the rocker arm insertion passage (54), and the fuel injection cam shaft (3). The pump operating portion (57) of the feed pump chamber (51) is driven from the fuel feed cam (35) through the rocker arm (55) and the pump interlocking portion (56) in the pump interlocking portion receiving passage (52).
In doing so, the protrusion (58) formed at the boundary between the inner bottom of the injection pump housing case (1) and the rocker arm insertion passage (54) is thinned by the lateral oil passage groove (59). .

  The lateral oil passage groove (59) and the second oil passage groove (61) are formed at the inner bottom of the injection pump housing case (1) from the outside of the injection pump housing case (1) through the rocker arm insertion passage (54). It is formed by a series of drilling of the drill that goes straight toward the.

In the second embodiment shown in FIG. 8 (A), the oil splashing means (5) opens an oil splashing hole (68a) in the peripheral portion of the disc (68) attached to the fuel injection camshaft (3). It is composed of things.
In the modification of the second embodiment shown in FIG. 8B, the oil splashing means (5) is arranged at predetermined intervals in the circumferential direction of the peripheral edge of the disc (69) attached to the fuel injection camshaft (3). It is comprised by the oil splashing protrusion (69b) formed between the notches (69a) provided in this.
Other configurations are the same as those of the first embodiment, and the same elements as those of the first embodiment are denoted by the same reference numerals.

(1) Injection pump housing case
(2) Fuel injection pump
(3) Fuel injection camshaft
(4) Oil reservoir case
(4a) Oil sump
(4b) Oil sump case end wall
(5) Oil splashing means
(7a) First lever
(7b) Second lever
(7c) Governor spring
(8) Actuator
(8a) Rod insertion hole
(8b) Output rod
(9) 庇
(10) Fuel metering section
(11) Timing gear case
(12) Fuel injection cam gear
(13) Oil pan
(14) Engine oil
(15) Oil pump
(20) Oil outflow passage
(25) Fuel feed pump
(35) Fuel feed cam
(51) Feed pump room
(52) Pump interlocking section accommodation passage
(53) Rocker arm attachment passage
(54) Rocker arm insertion passage
(55) Rocker arm
(56) Pump interlocking part
(57) Pump actuator
(58) ridge
(59) Sideways oil passage groove
(61) Sideways second oil passage groove

Claims (7)

Fuel injection pump (2) is accommodated in the injection pump housing case (1), the fuel injection cam shaft below the fuel injection pump (2) (3) are laid one end of the injection pump housing case (1) Is attached to the timing transmission gear case (11), the fuel injection cam gear (12) is attached to the end of the fuel injection cam shaft (3), and the fuel injection cam gear (12) is placed in the timing transmission gear case (11). Contained,
An oil reservoir case (4) is provided at the other end of the injection pump housing case (1), an oil reservoir (4a) is provided at the inner bottom of the oil reservoir case (4), and the engine oil of the oil pan (13) is provided. (14) is supplied to the oil sump (4a) by the pumping force of the oil pump (15),
In the oil sump case (4), an oil splashing means (5) is attached to the end of the fuel injection camshaft (3), and this oil splashing means (5) is used as the engine oil (14) in the oil sump (4a). The oil supply hole (64) is provided in the partition wall (17) between the injection pump housing case (1) and the oil reservoir case (4), and the oil splash that rotates with the fuel injection camshaft (3). The engine oil (14) bounced up by the raising means (5) is supplied from the oil supply hole (64) to the injection pump housing case (1) and flows into the inner bottom portion of the injection pump housing case (1). In the diesel engine, which flows into the timing transmission gear case (11) through the oil outflow passage (20) of the pump housing case (1) and returns to the oil pan (13),
An actuator (8) of an electronic governor is attached to the oil reservoir case end wall (4b) facing the partition wall (17), and the rod insertion hole (8a) of this actuator (8) is passed through the oil reservoir case (4). When the output rod (8b) is projected toward the fuel metering section (10) of the fuel injection pump (2),
The oil splashing means (5) is composed of a plate-like oil splashing blade (67) attached to the fuel injection camshaft (3),
Below the output rod (8b) of the actuator (8), a gutter (9) is led out from the partition wall (17) toward the oil sump case end wall (4b). A diesel engine characterized in that the oil splashing means (5) is housed in a position closer to the partition wall (17) than the leading edge (9a) of 9). The diesel engine according to claim 1,
Instead of the oil splashing means (5) being constituted by a plate oil splashing blade (67) attached to the fuel injection camshaft (3),
The oil splashing means (5) is constituted by an oil splashing hole (68a) formed in a peripheral portion of a disc (68) attached to the fuel injection camshaft (3). diesel engine. The diesel engine according to claim 1,
Instead of the oil splashing means (5) being constituted by a plate oil splashing blade (67) attached to the fuel injection camshaft (3),
Oil splashing means (5) is an oil splash formed between notches (69a) provided at predetermined intervals in the circumferential direction of the peripheral edge of a disc (69) attached to the fuel injection camshaft (3). A diesel engine comprising a raised protrusion (69b). In the diesel engine according to any one of claims 1 to 3,
A fuel feed pump (25) for supplying fuel to the fuel injection pump (2) is disposed beside the injection pump housing case (1) when viewed in a direction parallel to the installation direction of the fuel injection cam shaft (3). A pump interlocking portion accommodating passage (52) is disposed below the feed pump chamber (51) of the fuel feed pump (25), and a rocker arm mounting passage (53) is disposed beside the pump interlocking portion accommodating passage (52). A rocker arm insertion passage (54) of the injection pump housing case (1) is disposed beside the attachment passage (53), and the pump interlocking portion housing passage (52) is provided between the rocker arm attachment passage (53) and the injection pump housing case (1). Communicated with the inner bottom of the injection pump housing case (1) via the rocker arm insertion passage (54),
The rocker arm (55) attached to the rocker arm attachment passage (53) is inserted into the injection pump housing case (1) via the rocker arm insertion passage (54), and the fuel feed cam (35) of the fuel injection cam shaft (3). When the pump operating part (57) of the feed pump chamber (51) is driven through the rocker arm (55) and the pump interlocking part (56) in the pump interlocking part accommodating passage (52),
A protrusion (58) formed at the boundary between the inner bottom of the injection pump housing case (1) and the rocker arm insertion passage (54) is thinned by a lateral oil passage groove (59). diesel engine. The diesel engine according to claim 4, wherein
The oil outlet passage (20) of the injection pump housing case (1) is jetted by a drilling process in which the oil outlet passage (20) goes straight along the inner bottom surface of the injection pump housing case (1) from the end wall (23) of the injection pump housing case (1) An oil outflow hole (20a) provided in the bottom wall (28) of the pump case (1) is provided, and the oil outflow hole (20a) is provided in the bottom wall (28) of the injection pump housing case (1). A diesel engine characterized in that it communicates with the inner bottom of the injection pump housing case (1) through a lateral oil passage groove (59). The diesel engine according to claim 5, wherein
The oil outlet passage (20) of the injection pump housing case (1) includes a second oil outlet hole (20b) arranged side by side with the oil outlet hole (20a). The second oil outlet hole (20b) ) In the bottom wall (28) of the injection pump case (1) by a drilling process that advances straight from the end wall (23) of the injection pump storage case (1) along the inner bottom surface of the injection pump storage case (1). Provided,
The second oil outflow hole (20) is formed in the injection pump housing case (1) through a lateral second oil passage groove (61) provided in the bottom wall (28) of the injection pump housing case (1). A diesel engine characterized in that it communicates with the inner bottom. The diesel engine according to claim 6, wherein
The lateral oil passage groove (59) and the second oil passage groove (61) are formed at the inner bottom of the injection pump housing case (1) from the outside of the injection pump housing case (1) through the rocker arm insertion passage (54). Diesel engine characterized by being formed by a series of drilling process of drill (63) that goes straight toward.

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