JP2004003508A - Multiple cylinder engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multiple cylinder engine configured to be able to promote compactification of the engine further highly. <P>SOLUTION: The engine is configured to dispose starter motor (21) coming to attach a magnet switch on the side surface of the cylinder block so that the magnet switch (22) is completely set into a void (G) between an intake manifold and the cylinder block. The multiple cylinder engine (1) includes the intake manifold (15) disposing a plurality of intake tubes (A1-A4), in parallel of which one end is combined to a cylinder head (14) and of which other end is extended along side surface of the cylinder block (16) by being curved after it extends to direction far from the cylinder head, and is extended toward the one end after it is further curved to direction approaching the cylinder block. From this the compactfication of the entire engine can be promoted by reducing spacing as dead space. <P>COPYRIGHT: (C)2004,JPO

Description

According to the present invention, one end is coupled to the cylinder head, and the other end is extended in a direction away from the cylinder head, then curved, extended along the side surface of the cylinder block, and further curved toward the cylinder block. The present invention relates to a multi-cylinder engine having an intake manifold in which a plurality of intake pipes extending toward the one end side are arranged in parallel.

Various accessories are attached to the main body of the multi-cylinder engine. For example, a starter motor for applying a starting torque to a crankshaft is generally disposed above a transmission or beside an engine.
Japanese Patent Application Laid-Open No. 5-179983 (FIGS. 1 and 2)

However, since this starter motor requires a relatively large installation space including wiring of the battery, the protrusion amount from the outer contour of the engine main body tends to be relatively large, which promotes an increase in the size of the engine. There was a tendency.

According to the present invention, in order to solve such a problem and to further promote the downsizing of the engine, one end thereof is connected to the cylinder head (14), and the other end extends in a direction away from the cylinder head. A plurality of intake pipes (A1 to A4) which are curved after being extended, extended along the side surface of the cylinder block (16), and further curved toward the cylinder block, and then extended toward the one end side. ) Are arranged in parallel so that the magnet switch (22) is completely immersed in the gap (G) between the intake manifold and the cylinder block. Characterized in that a starter motor (21) provided with a magnet switch is arranged on a side surface of a cylinder block, or one end thereof. It is connected to the cylinder head, the other end extends in the direction away from the cylinder head, is curved, extends along the side surface of the cylinder block, and is further curved toward the cylinder block, and then is directed toward the one end side. An intake manifold formed by arranging a plurality of extended intake pipes in parallel, and a multi-cylinder engine in which a plurality of accessories are arranged on the side surface of the cylinder block, on a surface of the cylinder block facing the intake manifold, An air-conditioning compressor (11) is arranged at the end on the crank pulley side, and a starter motor is arranged at an end on the side opposite to the crank pulley. (24) is arranged.

According to the present invention having such a configuration, the space between the intake manifold and the cylinder block, and the space between the end faces of the air conditioning compressor and the starter motor in the cylinder row direction can be effectively used. A great effect can be achieved in reducing the space and further promoting the compactness of the entire engine.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the in-line multi-cylinder engine to which the present invention is applied, as viewed from the crank pulley side. An oil pump 2 for a power steering device, a tensioner pulley 3, an alternator 4, a water pump 5 for cooling an engine, and a compressor 6 for air conditioning are arranged on the side of the crank pulley end of the engine body 1 of the in-line multi-cylinder engine from above. They are arranged in this order. These auxiliary machines have a so-called serpentine type formed by a single (common) endless belt 13 wound between pulleys 7 to 11 and a crank pulley 12 provided on each of the auxiliary machines. Although driven collectively by power, the oil pump 2 for the power steering device and the alternator are arranged so that the pulley positions are alternately arranged in the left-right direction in order from the top in order to secure the winding angle of the belt 13 with respect to each of the pulleys 7 to 11. The air conditioner compressor 4 and the air conditioning compressor 6 are separated from the engine main body 1 to the right in FIG. 1, and the tensioner pulley 3 and the engine cooling water pump 5 are arranged close to the engine main body 1.

Thus, the plurality of accessories 2 to 6 are compactly arranged on one side of the engine body 1, and the plurality of accessories 2 to 6 can be reliably driven by one endless belt 13.

As shown in FIGS. 2 and 3, an intake manifold 15 is provided on the side of the cylinder head 14 where these auxiliary devices are provided. FIG. 2 shows a state in which all of the auxiliary devices 2 to 6 have been removed. The intake manifold 15 has four independent intake pipes A1, A2, A3, and A4 arranged in parallel in the cylinder row direction for each cylinder. Each intake pipe A1, A2, A3, and A4 has its own intake pipe. One end is coupled to the cylinder head 14, and the other end is curved and extends downward along the side surface of the cylinder block 16 after extending in a direction away from the cylinder head 14, and further toward the cylinder block 16. After being bent, it extends toward the coupling end side with the cylinder head 14, that is, extends upward, and has a shape that is entangled like a cochlea as a whole.

At the center where these intake pipes are wound, an intake collecting chamber connected to the throttle body and a rotary valve for changing the intake pipe length in a stepwise manner are provided, but their description is omitted. I do.

空 A gap G is formed between the intake manifold 15 and the cylinder block 16. Below this gap G, a starter motor 21 is provided.

(4) The starter motor 21 is provided with a magnet switch 22 for intermittently supplying current from a battery (not shown) to the starter motor 21 in parallel above the starter motor 21. The magnet switch 22 is disposed so as to be completely immersed in a 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.

A thermo case 24 that is integral with the hose port 23 and has a built-in thermostat valve is disposed between the end faces of the air conditioning compressor 6 and the starter motor 21 that are opposed to each other in the cylinder row direction and below the intake manifold 15. I have. As shown in FIG. 1, the plurality of auxiliary devices are accommodated in the entire width of the engine body 1 with the protruding end of the intake manifold 15 on the side of the cylinder block 16.

The multi-cylinder engine according to the present invention can be suitably applied to an automobile that wants to increase the cabin space after further reducing the body size.

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. 2 is a diagram showing the engine shown in FIG. 1 as viewed obliquely upward from below.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Engine body 6 Air-conditioning compressor 14 Cylinder head 15 Intake manifold 16 Cylinder block 21 Starter motor 22 Magnet switch 23 Hose port 24 Thermocase A1-A4 Intake pipe G Air gap

Claims (2)

One end thereof is connected to the cylinder head, and the other end is bent after extending in a direction away from the cylinder head, extends along the side surface of the cylinder block, and further bent in a direction approaching the cylinder block. A multi-cylinder engine having an intake manifold in which a plurality of intake pipes extending toward the side are arranged in parallel,
A multi-cylinder wherein a starter motor provided with the magnet switch is disposed on a side surface of the cylinder block so that the magnet switch is completely immersed in a gap between the intake manifold and the cylinder block. engine. One end thereof is connected to the cylinder head, and the other end is bent after extending in a direction away from the cylinder head, extends along the side surface of the cylinder block, and further bent in a direction approaching the cylinder block. A multi-cylinder engine in which a plurality of intake pipes arranged in parallel with a plurality of intake pipes extending toward the side and a plurality of accessories are arranged on a side surface of the cylinder block,
On the surface of the cylinder block facing the intake manifold, an air conditioning compressor is arranged at an end on the crank pulley side, and a starter motor is arranged on an end on the side opposite to the crank pulley,
A multi-cylinder engine, wherein a case of a thermostat valve is arranged between opposing surfaces of the air conditioning compressor and the starter motor in the cylinder row direction.

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