JPH03213427A - Engine device of small-size vehicle - Google Patents

Abstract

PURPOSE:To reduce a longitudinal dimension and equalize the front and rear load distribution by slanting the cylinder of an engine from a crankcase toward the outside, and installing a starter generator on the upper side of a crankcase and on the front side of a crankshaft. CONSTITUTION:An engine 1 in a small-sized vehicle such as a golf car is slanted toward the rear side from a crankcase 3 to which a crankshaft 2 is journaled, and is provided with a cylinder 4, a cylinder head 5 and so on. On the other hand, a starter generator 6 is installed on the upper side of the crankcase 3 and on the more forward side than the crankshaft 2 to balance the weight with the cylinder 4 and so forth. The center of gravity of the engine 1 is located on the perpendicular line of the crankshaft 2. It is thus possible to reduce a longitudinal demension and the like of the engine room and equalize the load applied to front and rear mount rubbers 11 of a mount metal piece to attenuate vibration of the engine 1 with good efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an engine device for a small vehicle such as a golf car.

[Conventional technology]

Small vehicles such as golf cars use an engine mounted at the rear of the vehicle to drive the two rear wheels.

Since a passenger seat is provided above the engine, the vertical height of the engine must be low. For this reason,
The engine is lowered by tilting the cylinder forward, and
The starter generator is installed on the front side of the crankcase. For example, see JP-A-61-218710.

[Problem to be solved by the invention]

Placing the starter generator in the front of the crankcase can reduce the vertical dimensions of the engine, but it increases the length from front to back and requires a long engine room from front to back. In addition, the engine is mounted on the vehicle body via a mounting bracket, but the length of the mount bracket is longer, and by attaching the starter generator to the front,
The center of gravity of the engine is at the front. Then, the load distribution between the front and rear parts of the mount metal fittings is disrupted, resulting in a disadvantage that a large load is applied to the front side.

In view of these points, this invention tilts the engine cylinder rearward, arranges the starter generator above the crankcase, reduces the front-rear dimensions of the engine, and shortens the front-rear length of the mount fittings. The purpose of the present invention is to obtain an engine device for a small vehicle in which the center of gravity of the engine is located approximately near the perpendicular line of the medium-heat crankshaft, and the load distribution between the front and rear mount fittings is balanced.

[Means to solve the problem]

In order to achieve the above object, the engine device for a small vehicle of the present invention has an engine mounted in the engine room at the rear of the vehicle body, and drives two rear wheels with the engine, and the engine cylinder is moved from the crankcase to the rear side. The starter generator is mounted on the upper side of the crankcase, slightly in front of the crankshaft, so that the center of gravity of the engine is approximately perpendicular to the crankshaft.

[Effect]

By tilting the engine cylinder toward the rear from the crankcase, space is created to place the starter generator above the crankcase, allowing the front-to-back length of the engine to be shortened and the front-to-back dimensions of the engine compartment to be shortened. In addition, by placing the starter generator above the crankcase and slightly forward of the crankshaft position, the weight of the starter generator is balanced with the cylinder tilted to the rear, and the center of gravity is placed near the crankshaft where the crankcase is in the middle. can be located. As a result, the length of the mount fitting attached to the lower side of the crankcase and mounted on the vehicle body can be shortened, and the load applied to the parts attached to the vehicle body in front and behind the mount metal can be distributed in a well-balanced manner.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The engine 1 is mounted with a cylinder 4, a cylinder head 5, etc. tilted rearward from a crankcase 3 in which a crankshaft 2 is mounted. The starter generator 6 is installed above the crankcase 3, slightly forward of the crankshaft 2, so as to maintain a weight balance with the cylinder 4, etc., and the center of gravity of the engine 1 is approximately on a perpendicular line to the crankshaft 2. Do it like this. The starter generator 6 is interlocked with the crankshaft 2 through a pulley and a belt. Further, the crankshaft 2 is connected to two rear wheels 9 via a continuously variable V-belt transmission 7 and a transmission 8 equipped with an automatic centrifugal clutch. A mount fitting 10 is connected to the lower side of the crankcase 3, and the mount fitting 10 is attached to the car body 12 with the engine 1 floating through the mount rubber 11 at two places on the front and back. Install it inside the engine room 13.

〔Effect of the invention〕

As explained above, since the present invention is configured as described above, by tilting the cylinder rearward from the crankcase, the starter generator can be mounted above the crankcase, and the front-rear dimension of the engine is improved. can be made smaller, and the front and rear dimensions of the mounting fittings and engine room can also be made smaller. Also, by placing the starter generator on the second side of the crankcase, slightly in front of the crankshaft, it is possible to balance the weight with the cylinder tilted to the rear, and it is placed near the crankshaft in the center of the engine. A center of gravity can be set. This makes it possible to balance the loads applied to the mount rubbers at the front and rear of the mount fitting, and to efficiently damp engine vibrations transmitted to the vehicle body. Additionally, the starter generator is located above the crankcase, making maintenance such as belt adjustment easy.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a side view of the engine portion, and Fig. 3 is a plan view thereof. 1...engine, 2...crankshaft, 3...
・Crankcase, 4...Cylinder 6...Starter generator 9...Rear two wheels, 12...Vehicle body, 13...Engine room.

Claims (1)

[Claims] The engine is mounted in the engine room at the rear of the vehicle, and the engine drives the two rear wheels.The engine cylinder is tilted backwards from the crankcase, and the starter generator is located above the crankcase, slightly in front of the crankshaft. An engine device for a small vehicle, characterized in that the center of gravity of the engine is located approximately at a perpendicular portion of the crankshaft.