JP3864042B2 - Multi-cylinder engine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, one end is coupled to the cylinder head, the other end is extended in a direction away from the cylinder head, and then bent along the side surface of the cylinder block, and further bent toward the cylinder block. The present invention relates to a multi-cylinder engine having an intake manifold in which a plurality of intake pipes extended toward the one end side are arranged in parallel.
[0002]
[Prior art]
Various auxiliary machines are attached to the main body of the multi-cylinder engine. For example, a starter motor for applying a starting torque to the crankshaft is generally disposed above the transmission or on the side of the engine.
[0003]
[Problems to be solved by the invention]
However, since this starter motor requires a relatively large installation space including wiring of the battery, the amount of protrusion from the outer contour of the engine body tends to be relatively large.
[0004]
The present invention has been devised to solve such problems of the prior art, and a main object of the present invention is a multi-cylinder engine configured to be able to further promote the downsizing of the engine. Is to provide.
[0005]
[Means for Solving the Problems]
In order to achieve such an object, in the present invention, one end of the cylinder block (14) is coupled to the cylinder head (14), and the other end is extended in a direction away from the cylinder head. And a plurality of intake pipes (A1 to A4) extending toward the one end side after being curved toward the cylinder block and arranged in parallel in the cylinder row direction ( 15), an air conditioning compressor (6) disposed on the side close to the crank pulley (12) in the cylinder block, a thermo case (24) incorporating a thermostat valve , and a side far from the crank pulley in the cylinder block the multi-cylinder engine having a arranged a starter motor (21) (1), the starter motor (21) on the To, together with arranging the magnet switch (22) in parallel with the starter motor, the magnet switch, is retracted into the gap (G) defined between said intake manifold and the cylinder block, the Sir Moke over the scan was assumed, characterized in that disposed below the and the intake manifold is between about cylinder row direction between said air-conditioning compressor the starter motor.
[0006]
In this way, the dead space can be effectively used, and therefore it is possible to reduce the useless space and promote the downsizing of the entire engine.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
[0008]
FIG. 1 shows an inline multi-cylinder engine to which the present invention is applied as viewed from the crank pulley side. An oil pump 2, a tensioner pulley 3, an alternator 4, an engine cooling water pump 5, and an air conditioning compressor 6 from above are disposed on the side of the crank pulley end of the engine body 1 of this in-line multi-cylinder engine. Arranged in this order. These auxiliary machines have a so-called serpentine type with a single (common) endless belt 13 wound between pulleys 7 to 11 and a crank pulley 12 provided in each auxiliary machine. Although it is collectively driven by power, in order to secure the winding angle of the belt 13 with respect to each of the pulleys 7 to 11, the oil pump 2 for the power steering device and the alternator are arranged so that the pulley positions are staggered in the left-right direction in order from the top. 4 and the air-conditioning compressor 6 are separated from the engine body 1 to the right in FIG. 1, and the tensioner pulley 3 and the engine cooling water pump 5 are disposed close to the engine body 1.
[0009]
In this way, the plurality of auxiliary machines 2 to 6 are arranged compactly on one side of the engine body 1 and the plurality of auxiliary machines 2 to 6 can be reliably driven by the single endless belt 13.
[0010]
As shown in FIGS. 2 and 3, an intake manifold 15 is disposed on the side of the cylinder head 14 where these auxiliary machines are disposed. FIG. 2 shows a state in which all the auxiliary machines 2 to 6 are removed. The intake manifold 15 is formed by arranging four intake pipes A1, A2, A3, and A4, which are independent for each cylinder, in parallel in the cylinder row direction, and each of the intake pipes A1, A2, A3, and A4 includes One end is coupled to the cylinder head 14, and the other end extends in a direction away from the cylinder head 14, is then curved, extends downward along the side surface of the cylinder block 16, and further approaches the cylinder block 16. After being bent, it is extended toward the coupling end with the cylinder head 14, that is, upwards, and as a whole has a shape of being wound in a cochlear shape.
[0011]
An intake manifold chamber connected to the throttle body and a rotary valve for changing the intake pipe length in stages are provided at the center around which these intake pipes are wound. To do.
[0012]
A gap G is generated between the intake manifold 15 and the cylinder block 16. A starter motor 21 is disposed in the gap G.
[0013]
In the starter motor 21, a magnet switch 22 for interrupting current from a battery (not shown) to the starter motor 21 is arranged in parallel above the starter motor 21. The magnet switch 22 is disposed so as to be completely immersed in the gap G defined between the intake manifold 15 and the cylinder block 16. This is intended to improve the space efficiency of the entire engine.
[0014]
A thermocase 24 that is integrated with the hose port 23 and has a built-in thermostat valve is disposed between the air conditioning compressor 6 and the starter motor 21 in the cylinder row direction and below the intake manifold 15. Yes.
[0015]
【The invention's effect】
As described above, according to the present invention, the dead space defined between the intake manifold and the cylinder block can be effectively used, so that unnecessary space can be reduced and the entire engine can be made more compact. A great effect can be achieved.
[Brief description of the drawings]
FIG. 1 is a front view of a crank pulley side of an in-line multi-cylinder engine according to the present invention. FIG. 2 is a front view of only a main part of the engine shown in FIG. 1. FIG. 3 is a view of the engine shown in FIG. Figure showing the figure [Explanation of symbols]
1 Engine Body 14 Cylinder Head 15 Intake Manifold 16 Cylinder Block 21 Starter Motor 22 Magnet Switch A1 to A4 Intake Pipe G Gap

Claims (1)

One end thereof is coupled to the cylinder head, the other end is extended in a direction away from the cylinder head, and then bent along the side surface of the cylinder block, and further bent toward the cylinder block. An intake manifold in which a plurality of intake pipes extending in the direction of the cylinder are arranged in parallel in the cylinder row direction, an air conditioning compressor arranged on the side close to the crank pulley in the cylinder block, and a thermostat incorporating a thermostat valve A multi-cylinder engine having a case and a starter motor disposed on the side far from the crank pulley in the cylinder block ,
A magnet switch is arranged in parallel with the starter motor above the starter motor, and the magnet switch is immersed in a gap defined between the intake manifold and the cylinder block,
Multi-cylinder engine, characterized in that said service Moke over scan, placed below and the intake manifold is between about cylinder row direction of the starter motor and the air-conditioning compressor.

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