JPH0350318A - Engine unit for vehicle - Google Patents

Abstract

PURPOSE:To decrease the width of an engine in the direction of a crank shaft and to improve the mounting characteristic of the engine by placing a water pump on an axis of rotation to which the rotation of the crank shaft is transmitted on the side face of a cylinder block so that it is located within a width in the axial direction of the engine. CONSTITUTION:A water pump 120 is arranged so that it is located at the front side of an engine E and its axis of rotation 121 is parallel to a crank shaft 6 and located within a width of the crank shaft of an engine main body. The water pump is rotated in accordance with the crank shaft 6 through a chain or the like. At the air intake side of the water pump 120, a water inlet 123 is provided and connected to the outlet side of a radiator 5 through a piping 124. The inlet side of the radiator 5 is connected to a cooling water outlet 140 formed on the side portion of a front side of a cylinder block 7 through a piping 141. Then, the discharge port 129 of the water pump 120 is connected to a cooling water inlet 130a provided on the side face of a vehicle front side of the cylinder block and communicates with a cooling water passage 131.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vehicle engine unit, and more particularly to a vehicle engine unit equipped with a water-cooled cooling system.

[Prior Art] In a vehicle such as an automobile, an engine unit having an engine body composed of a cylinder block and a cylinder head is arranged so that the crankshaft extends in the width direction of the vehicle. Install a radiator in front,
Some engines use a water pump to circulate cooling water through the engine unit.

This water pump is attached to one end surface of the cylinder block perpendicular to the crankshaft. Further, a pipe for supplying cooling water from the radiator was connected to the water pump provided so as to protrude from the cylinder block in the vehicle width direction.

[Problems to be Solved by the Invention] As described above, in a vehicle in which the engine unit is arranged so that the crankshaft extends in the vehicle width direction, and the radiator is provided in front of the engine unit, the water pump and piping There is a problem that the engine protrudes from the cylinder block in the crankshaft direction and cannot be accommodated within the width of the engine body.Therefore, it is desired to make the engine width in the crankshaft direction more compact in order to mount the engine unit.

This invention was made against the background of the above circumstances, and an object of the present invention is to provide a vehicle engine unit that can easily secure a space for arranging an auto bomb, and that also simplifies the piping structure to make the engine more compact. There is.

[Means for Solving the Problems] In order to solve the above problems, the vehicle engine unit of the present invention includes an engine unit having an engine body composed of a cylinder block and a cylinder head.
While the crankshaft is arranged to extend in the vehicle width direction,
In a vehicle in which a radiator is provided in front of the engine unit, a rotating shaft to which the rotation of the crankshaft is transmitted is provided parallel to the crankshaft and in front of the engine body, and a water pump is mounted on the rotating shaft on the engine body. The suction side of this water pump and the radiator are connected via piping, and the water pump It is characterized in that it is connected to the discharge port.

[Operation] In the vehicle engine unit of the present invention, the rotating shaft rotates in conjunction with the crankshaft, and the rotating shaft drives the water pump disposed in front of the engine body. As a result, cooling water is supplied from the radiator via piping from the discharge port of the heater bomb to the cooling water inlet provided on the vehicle front side of the engine body, circulates and cools the engine body, and is sent to the radiator.

[Example] Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 is a side view showing the vehicle engine unit of the present invention installed, FIG. 2 is a plan view thereof, FIG. 3 is a side view of the vehicle engine unit, and FIG. 4 is a front view of the vehicle engine unit. Figures 5 and 6 are partially cutaway side views of a vehicle engine unit, and Figure 7 is a side view of the vehicle engine unit shown in Figure 6.
-■ sectional view, Fig. 8 is a -■ sectional view of Fig. 5, Fig. 9 is a plan view of the cylinder block, Fig. 10 is a view seen from the direction of arrow A in Fig. 9, and Fig. 11 is a sectional view of the cylinder block. X-■ sectional view of Figure 10,
Fig. 12 is a vertical cross-sectional view of the cylinder head, and Fig. 13 is a longitudinal cross-sectional view of the cylinder head.
FIG. 2 is a sectional view taken along the line ■-■ in FIG. 2, FIG. 14 is a side view of the cylinder head on the opposite side to where the second chain is provided, and FIG. 15 is a system diagram of the cooling system.

In FIGS. 1 and 2, reference numeral 1 indicates an engine compartment of an automobile, and this engine compartment 1 is formed above and between left and right front wheels 3 connected by a front axle 2.

An engine unit 4 of a four-stroke, six-cylinder engine is mounted in the engine compartment 1, and a radiator 5 is disposed in front of the engine unit 4 in a vehicle. The engine unit 4 has a spacious cabin by arranging the crankshaft 6 so as to extend in the vehicle width direction.

As shown in FIGS. 5 to 7, the crankshaft 6 of the engine unit is supported between a cylinder block 7 and a bearing case 8, and has a piston 9 provided in each cylinder.
is connected to the connecting rod 10 by a connecting rod 10. In addition, a plate 90 having a protrusion 90a on the outer periphery is provided at the end of the crankshaft 6 protruding from the cylinder block 7, as shown by the two-dot chain line in FIGS. The sensor 91 detects the protrusion 90a of the plate 90.
, and the phase of the crankshaft 6 can be detected.

A cylinder head 11 is placed on the cylinder block 7 to constitute an engine body E, and the cylinder head 11 is provided with a herad cover 12, and further, a spark plug 13 is provided in each cylinder.

An oil pan 14 is attached to the bearing case 8, and an oil tank 15 is further connected to the oil pan 14, and the oil tank 15 is arranged in a raised position in front of the vehicle from the bottom to the top of the engine. .

As shown in FIGS. 5 and 6, the cylinder row of the engine is inclined toward the rear of the vehicle with respect to the vertical direction, and the output output shaft 16 for taking out the output from the crankshaft 6 is provided parallel to the crankshaft 6. Furthermore, the output output shaft 16 is connected to the crankshaft 6
It is placed diagonally above the front. An oil tank 1 that stores oil diagonally below the output output shaft 16 and the crankshaft 6.
5 is located, so that the oil tank 15 is in the third position.
It faces toward the front of the vehicle as indicated by the arrow FWD in FIGS. 5, 5, and 6. Further, the angle α formed between the cylinder axis L1 and the line L2 connecting the crankshaft center and the output output shaft center is an acute angle'.

As shown in FIG. 6, a pair of oil passages 17 are formed in the oil pan 14, passing both sides of the guide portion 14a in the vertical direction. The oil is sucked from the lower suction port 17a of the oil passage 17 by the discharge pumps 18 and 19.
The oil is sent to the oil tank 15. Note that the oil pan 14 and the oil tank 15 are separated by a wall portion in which an oil passage 17 is provided. Cylinder block 7, bearing case 8
At the bottom of the crank chamber A formed by the oil pan 14, oil that has lubricated various parts of the engine such as the cylinder block 7 is collected, and a screen 20 is provided at the suction port 17a to prevent dust from being sucked in. A plate 21 is attached to a guide portion 14a inside the oil pan 14.

The oil stored in the oil tank 15 is transferred to the output output shaft 16.
By driving the oil supply pump 24 provided in the
Inhaled through 6. After that, the oil passage 14b formed in the oil pan 14 and the oil passage 8a formed in the bearing case 8 pass through the oil cooler 22 and the oil filter 23, and then the oil passage 7a formed in the cylinder block 7 and cylinder head 11. , lla, it is supplied to each part of the engine. This oil flows through the oil passage 11b of the cylinder head 11 and the oil passage 7b of the cylinder block 7 and is returned to the oil pan 14, and the circulation of this oil is shown by arrows in FIG.

An oil inlet 15a is provided at the top of the oil tank 15 and is closed with a cap 27. A breather portion 15b is provided in the upper portion of the oil tank 15 and has a labyrinth formed by partition walls (not shown).

As shown in FIGS. 7 and 8, a gear 28 is formed on the crankshaft 6 as a crank arm, and this gear 28 meshes with a gear 29 provided on the output shaft 16.

Note that the power transmission from the crankshaft 6 to the output output shaft 16 is not limited to the gears 28 and 29, and a chain may also be used, and the position thereof may be the shaft end of the crankshaft 6 or the crankshaft 6.
You can choose any part of the process.

The intermediate shaft 31 is pivotally supported by the cylinder head 11 so as to be located on the front side of the engine body E, and is connected to the output output shaft 1.
The gear 30 provided at the gear 6 is connected to the gear 32 of the intermediate shaft 31.
The gear 34 provided on the intermediate shaft 31 is connected to the gear 38 of the camshaft 37 of the valve mechanism 36 via the second chain 35 to reduce the speed by, for example, 0.8. .6 deceleration, crankshaft 6
The camshaft 37 is rotated by the rotation of the camshaft 37. The rotation of this camshaft 37 causes the integrally formed cam 39 to
pushes an intake valve and an exhaust valve (not shown) at predetermined valve timing to open and close an intake passage 11c and an exhaust passage 11d formed in the cylinder head 11. The camshaft 37 is attached to the cylinder head 11 with a cam cap 10.
2, and a fuel injector (not shown) is provided in the intake passage lie to supply fuel at a predetermined timing.

The intermediate shaft 31 is above the output output shaft 16 and is pivotally supported by the cylinder head 11 at a position below the intake passage 11c and the intake pipe 41 connected thereto, and aligns the first chain 33 with the cylinder axis. As shown in FIGS. 8 to 10, the second chain 35 is located on one side of the cylinder x1 between the cylinders X1 and X2, and the second chain 35 is located on the other side of the cylinder It is located on the side.

Further, the cylinder head 11 supporting the intermediate shaft 31 has mounting openings 112 and 11 for both gears 32 and 34 of the intermediate shaft 31.
3 is formed, and the mounting opening 112 is connected to the cap 11.
4, and the mounting opening 113 is covered with a cover 116. The attachment opening 112 on the side to which the first chain 33 is connected opens obliquely upward.

A rotating shaft 121 that drives the water pump 120 is supported on the front side of the cylinder block 7 in parallel with the crankshaft 6 and the output shaft 16 so as to be located on the front side of the engine body E. Gear 122 provided
is meshed with the first chain 33, and the rotating shaft 121 rotates in conjunction with the rotation of the crankshaft 6. As shown in FIG. 5, the rotating shaft 121 is provided on the same side of the cylinder axis L1 as the output output shaft 16 that takes out the power from the crankshaft 6. Since it is an essential component to be removed, the rotating shaft 121
By providing this, the width of the engine in the direction perpendicular to the crankshaft 6 does not increase.

As shown in FIGS. 8 and 11, on the rotating shaft 121,
A water pump 120 is provided to be located within the width of the engine body E in the crankshaft direction, and a water inlet 123 is provided on the suction side of the water pump 120, and is connected to the outlet side of the radiator 5 via a pipe 124. has been done. As shown in FIGS. 6 and 15, the water inlet 123 has a built-in regulating valve 125, and this regulating valve 125 is equipped with a thermostat 126, so that when the cooling water in the engine reaches a predetermined temperature, Cooling water is allowed to flow into the water pump 120 from the piping 124.

1 A discharge port 129 on the discharge side of the water pump 120 is connected to a cooling water outlet 1 provided on the side surface of the cylinder block 7 on the vehicle front side.
30, and the cooling water is connected to this cooling water population 130.
From there, the coolant is supplied to a cooling water passage 132 formed in the cylinder head 11 via a cooling water passage 131 formed around the rotating shaft 121 of the cylinder block 7 . Note that as long as the cooling water inlet 130 is on the front side surface of the vehicle, it may be a surface facing in the vehicle width direction as in this embodiment, or of course may be a surface facing the front of the vehicle.

Since the water pump 120 is attached to the cylinder block 7 so that the cooling water port 130 of the cylinder block 7 is covered by the discharge port 129 of the water pump 120, there is no need for piping to connect the cooling water port 130 and the discharge port 129. be. In addition, the cooling water passage 131 and the cooling water passage 130 formed in the cylinder block 7 are formed on the side surface of a bearing portion 133 that is provided to bulge forward from the cylinder block 7 in order to pivotally support the output output shaft 16. Since there is no need to form a special protrusion on the cylinder block 7, the engine body E does not become large.

The cooling water passage 131 formed in the cylinder block 7 is
As shown in FIGS. 9 and 11, the cylinder block 7
It opens at the upper end surface, and the cooling water passage 132 of the cylinder head 11 opens at the lower end surface of the cylinder head 11. And the cooling water passage 13 on the cylinder block side
The first opening 131a opens at a position corresponding to the opening 132a of the cooling water passage 132 on the cylinder head side. As a result, when the cylinder head 11 is placed on the cylinder block 7, the cooling water passage 131 and the cooling water passage 132
is connected.

The cooling water passage 131 does not merge with the water jacket 134 of the cylinder block 7, but rather flows through the cylinder head 1.
The cooling water passage 132 is connected to a cooling water passage 132 formed in the cylinder head 11, and cooling water is guided from the cooling water passage 132 to a water jacket 135 formed in the cylinder head 11. The flow of this cooling water is shown by arrows in FIG.

As shown in FIGS. 12 and 13, the cylinder head 11 is tightened and fixed to the cylinder block 7 by bolts 137 inserted into boss portions 136 between the cylinders, and one side is attached to a portion located above the combustion chamber. An intake passage 11c is formed on one side, and an exhaust passage 1td is formed on the other side, and furthermore, a spark plug 13 is attached to the central part.

The quarter jacket 135 of the cylinder head 11 includes these boss portions 136, the intake passage 11c, and the exhaust passage 11.
A rectifying section 138 is provided between the cylinders, and a guide section 138a for guiding the cooling water is formed in the rectifying section 138 so that the cooling water flows at a predetermined flow rate for cooling. ing. This rectifier 138 is provided on the exhaust side, and is designed to effectively cool the exhaust side, which has a higher temperature than the intake side. Further, the guide portion 138a of the rectifying portion 138 is provided with its tip portion offset from the spark plug 13 by a distance @Z toward the exhaust side, and
Cooling efficiency is increased by directing cooling water towards the exhaust side. This cooling water combing in the cylinder head 11 is
This is indicated by arrows in FIGS. 12 and 13.

Furthermore, as shown in FIG. 6, the cooling water in the water jacket 135 of the cylinder head 11 is
The water is supplied to the water jacket 134 from a communication passage 139 formed in the lower part of the cylinder block 7 through a communication passage 139 formed in the cylinder block 7, and cools the cylinder block 7.

In this way, the cooling water is first introduced to the cylinder head 11, which becomes hot during engine operation, to cool it, and then the cylinder block is cooled, thereby effectively cooling the engine.

Water jacket 1 formed in cylinder block 7
A cooling water outlet 140 communicating with the cylinder block 7
The cooling water outlet 140 is provided close to the water pump 120. A quarter outlet 127 is attached to this cooling water outlet 140, and this quarter outlet 127 is communicated with the inlet side of the radiator 5 via a pipe 141.
The inlet and outlet are symmetrically located, and the flow of cooling water is a cross flow.

This quarter outlet 127 is provided with a water temperature sender 143 and a water temperature sensor 144, as shown in FIG. , are connected to each other by a bypass passage 128, and by providing the water outlet 127, water inlet 123, and water pump 120 in parallel and close to each other, the bypass passage 128 is shortened, making piping easier, and reducing heat loss. becomes less.

Note that the quarter outlet 127 and the water pump 120 are installed in opposite positions, and the rad 1 is attached to the cylinder.
1, cooling water may be supplied to the cylinder block 7.

Furthermore, as shown in FIG. 15, two cooling water pipes 145 and 1466 are provided in the upper part of the cylinder head 11, one of which is connected to the water pump 120 via a heater 147, and the other. The cooling water pipe 146 is connected to the cooling water pipe 1 via an oil cooler 148.
45 and is connected to the water pump 120.

The oil cooler 148 is cooled with this cooling water while the engine is operating, and the heater 147 supplies warm air into the passenger compartment as required during engine operation. Immediately after the engine starts, the temperature of the cooling water is low, so the regulating valve 125 of the water inlet 123 operates the thermostat 126 to cut off the supply of cooling water from the radiator 5 side, and the bypass passage 128
are communicating. When the water pump 120 is driven, cooling water from the cylinder head 11 is circulated through the water outlet 127 and the bypass passage 128 to the cylinder head 11 and the cylinder block 7 via the water pump 120.

When the engine is started and the cooling water reaches a predetermined temperature, the thermostat 126 of the regulating valve 125 is activated to shut off the bypass passage 128 and the water inlet 1
23 and the water pump 120 are communicated, and the cooling water is sent from the water outlet 127 to the radiator 5, where it is cooled by heat exchange, returned to the quarter inlet 123, and then sent to the cylinder via the water pump 120. Cool the cylinder block 7.

During operation of this engine, cooling water is constantly circulated from the cooling water pipe 146 connected to the cylinder head 11 via the oil cooler 148, so that the cooling water is supplied to the cylinder head 11.
Even if the cooling is circulated from the cylinder block 7 to the cylinder block 7, the quarter jacket 135 of the cylinder head 11
This prevents air from accumulating in the area.

Furthermore, the cooling water pipe 146 is not limited to the position shown in FIG.
The water jacket 135 may be connected to the end surface opposite to the side where the chain 35 is provided, and the cooling water pipe 146 is connected to the water jacket 13 in FIG.
Since the water jacket 135 is taken out from the highest position of the water jacket 135, air can be reliably removed from the water jacket 135.

An exhaust pipe 40 and an intake pipe 41 are connected to each cylinder row to the cylinder head 11, and each intake pipe 41 is connected to a surge tank 42.
2 is arranged to extend in the vehicle width direction, and is supported by the cylinder block 7 by a stay 43. A throttle valve 44 is provided on the air intake port side of the surge tank 42.

As shown in FIG. 1, a flywheel 45 and a clutch mechanism (not shown) are provided at one end of the output shaft 16.
Power is transmitted to the front axle 2 of the front wheels 3 via the transmission 47. Further, the primary side of the transmission 47 is arranged on the output output shaft 16, and the secondary side is arranged on the counter shaft 48, and rotates the front axle 2 via a gear 49 provided on the axle 2.

Furthermore, an auxiliary drive pulley 50 is provided at the other end of the output output shaft 16 as shown in FIG. It is positioned so as to fit into the recess 51 facing the bearing 60 of the crankshaft 6. A belt 55 is passed from the auxiliary drive pulley 50 to the pulleys of auxiliary machines such as an alternator 52, a power steering pump 53, and an air conditioner compressor 54, so that these are driven simultaneously by the rotation of the output output shaft 16. ing. The tension of the belt 55 is adjusted by the idler 92. It is carried out by

In this embodiment, the rotation shaft 121 rotated by the first chain 33 that transmits the rotation of the output output shaft 16 to the intermediate shaft 31 is used as the rotation shaft to which the rotation of the crankshaft 6 is transmitted. is used as the output extraction shaft 16, and an auto bomb may be provided on the output extraction shaft 16, and a water pump may be further provided on the intermediate shaft 31.

[Effects of the Invention] As mentioned above, the vehicle engine unit of the present invention has the following effects:
Since the water pump is installed on the rotating shaft 0 to which the rotation of the crankshaft is transmitted so as to be located within the width of the engine body in the direction of the crankshaft, the width of the engine in the direction of the crankshaft can be made compact, which is advantageous for mounting the engine unit. be.

Furthermore, while the suction side of the water pump and the radiator are connected via piping, the girder cooling water inlet installed on the front side of the engine body is connected to the water pump's discharge port, so piping etc. There is no protrusion in the axial direction, and the piping is simple and shortened.

[Brief explanation of drawings]

FIG. 1 is a side view showing the vehicle engine unit of the present invention installed, FIG. 2 is a plan view thereof, FIG. 3 is a side view of the vehicle engine unit, and FIG. 4 is a front view of the vehicle engine unit. Figures 5 and 6 are partially cutaway side views of a vehicle engine unit, and Figure 7 is a side view of the vehicle engine unit shown in Figure 6.
-■ sectional view, Fig. 8 is a -■ sectional view of Fig. 5, Fig. 9 is a plan view of the cylinder block, Fig. 10 is a view seen from the direction of arrow A in Fig. 9, and Fig. 11 is a sectional view of the cylinder block. ℃-℃ sectional view in Figure 10,
Fig. 12 is a vertical cross-sectional view of the cylinder head, and Fig. 13 is a longitudinal cross-sectional view of the cylinder head.
FIG. 2 is a sectional view taken along line 2, FIG. 14 is a side view of the cylinder head on the side opposite to where the second chain is provided, and FIG. 15 is a system diagram of the cooling system. In the figure, 1 is an engine compartment, 6 is a crankshaft, 7 is a cylinder block, 8 is a bearing case, 11 is a cylinder head,
16 is an output extraction shaft, 120 is a water pump, 121 is a rotating shaft, 123 is a water inlet, 127 is a quarter outlet, 128 is a bypass passage, 131, 13
2 is a cooling water passage, and E is the engine body. Indication of procedural amendment case ρ/-/fB B/M Patent application filed on July 19, 1999 (3) Title of the invention
Relationship with the case of a person correcting a vehicle engine unit Address of patent applicant: 2500 Shingai, Iwata City, Shizuoka Prefecture

Claims (1)

[Claims] In a vehicle in which an engine unit having an engine body composed of a cylinder block and a cylinder head is arranged such that the crankshaft extends in the vehicle width direction, and a radiator is provided in front of the engine unit, the crankshaft A rotating shaft to which the rotation of the engine is transmitted is provided parallel to the crankshaft and on the front side of the engine body, and a water pump is provided on this rotating shaft so as to be located within the width of the engine main body in the crankshaft direction, and A vehicle engine unit characterized in that the suction side of the pump and the radiator are connected via piping, and the cooling water inlet provided on the vehicle front side of the engine body is connected to the discharge port of the water pump. .