JPH0217694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a slant type engine having an inclined cylinder bore, and relates to an engine auxiliary equipment mounting structure that balances the left and right sides of the engine as much as possible.

(Prior art) A slant-type engine is one in which the cylinder bore is inclined to shorten the engine height as much as possible in order to house the engine under the seat, such as in a cab-over vehicle. As with regular engines, auxiliary equipment such as the alternator and cooler compressor were attached to the left and right sides of the cylinder block, which caused the engine's center of gravity to shift toward the slant, resulting in poor weight balance and increased vibration. As a result, the engine mount structure for absorbing vibrations became complicated, resulting in problems such as the inability to absorb vibrations sufficiently.

(Object of the Invention) In order to solve the above-mentioned problems, the present invention provides an engine supplement that improves the left-right balance of the engine, weakens the rolling moment in the slant direction, reduces vibration, and facilitates the engine mount structure. The purpose is to provide an instrument mounting structure.

(Structure of the Invention) To achieve the above object, the present invention includes a cylinder block whose cylinder bore is inclined with respect to the vertical direction of the vehicle in an installed state, and with respect to a plane perpendicular to the vehicle passing through the central axis of the crankshaft. This is an engine auxiliary equipment mounting structure in which the center of gravity of the main engine is offset to one side, and the center of gravity of the entire auxiliary equipment such as the alternator and cooler compressor is offset to one side with respect to the perpendicular plane. This is an engine auxiliary equipment mounting structure in which the auxiliary equipment is arranged on the opposite side of the offset direction of the center of gravity of the engine main body.

In this way, the center of gravity of the main body of the engine is offset from the center of the crankshaft to the slant side, but by considering the mounting position of accessories, the center of gravity of the entire engine including accessories can be adjusted to the center of the crankshaft. This improves the left-right balance of the engine, reduces vibration, and simplifies the mount structure that supports the engine.

Note that when the vehicle is stopped on a horizontal road, the vertical direction of the vehicle is the vertical direction.

(Example) Examples of the present invention will be described below based on the drawings.

1 is a cylinder block in which the cylinder bore is inclined to the right in the figure by an angle (θ) with respect to a plane perpendicular to the vehicle passing through the central axis of the crankshaft 2 (hereinafter simply referred to as the vertical plane), and a cylinder head is attached to the upper end. 3
is included.

Therefore, cylinder block 1, cylinder head 3
The center of gravity of the main body of the engine is offset to the right in the figure from the vertical plane.

4 is an alternator, and 5 is a cooler compressor, both of which are the main auxiliary equipment, and the cooler compressor 5, which is the heaviest of the auxiliary equipment, is placed farthest to the left when viewed from the vertical plane. Next, the heavy alternator 4 is placed slightly to the left of the vertical plane, and the center of gravity of the alternator 4, cooler compressor 5, and other auxiliary equipment is aligned toward the vertical plane. More to the left,
It is located on the opposite side of the vertical plane from the center of gravity of the main body of the engine, and is almost horizontally balanced to reduce vibration and weaken the rolling moment in the slant direction.

Reference numerals 6 and 6a designate engine mounts that support the entire engine on the vehicle body via brackets 7 and 7a, respectively, and absorb vibrations.The engine mount 6 on the slant side is attached to the liner attachment boss 8 and the skirt attachment boss 8 of the cylinder block 1. The boss 9 reinforces each part, and by bending the bracket 7 into a nearly U-shape, an engine mount 6 connecting the liner and skirt parts can be formed, and the engine mount can be placed at the ideal center of rolling. 6, the mounting effect can be maximized, and the size and weight can be reduced.

Furthermore, the bracket 7 also has the effect of functioning as a reinforcing member that connects the liner portion and the skirt portion.

In this regard, in the past, the engine mount was attached to either the liner part or the skirt part, which was far from the center of rolling and had poor reinforcing effect.

Further, the bracket 7a on the opposite side also plays a role of reinforcing the skirt portion of the cylinder block 1 on the side opposite to the slant side, which extends particularly long and is prone to vibrations, and serves to reduce vibrations together with the mounting boss.

(Effects of the Invention) According to the present invention as described above, by considering the attachment of auxiliary equipment, the left and right balance of the slant type engine, which tends to be unbalanced, can be almost balanced, and vibrations can be reduced.
The rolling moment in the slant direction can be weakened, and the structure of the engine mount can be simplified to make it smaller and lighter.

[Brief explanation of drawings]

The drawing is a partially cutaway front view showing an example of an engine having the auxiliary equipment mounting structure of the present invention. 1... Cylinder block, 2... Crankshaft, 3... Cylinder head, 4... Alternator, 5... Cooler compressor.

Claims (1)

[Claims] 1 Equipped with a cylinder block whose cylinder bore is inclined with respect to the vertical direction of the vehicle when installed,
An engine accessory mounting structure in which the center of gravity of the main engine is offset to one side with respect to a plane perpendicular to the vehicle that passes through the central axis of the crankshaft, and the center of gravity of the entire accessory is offset to one side of the plane perpendicular to the vehicle passing through the central axis of the crankshaft. An accessory mounting structure for an engine, characterized in that the accessories are arranged on the opposite side of the offset direction of the center of gravity of the engine main body with respect to a flat plane.