JPH03159819A - Power unit device for automobile - Google Patents

Abstract

PURPOSE:To shorten the whole length of the power unit device of an FF-type automobile by disposing a transmission mechanism more on the rear side than an engine as well as at a higher part than a differential gear mechanism and substantially parallel to the engine at the time of mounting the engine horizontally. CONSTITUTION:At the time of mounting an in-line six-cylinder engine 5 horizontally in an engine room located at the front of an automobile, the engine 5 is mounted at a part more on the front side than a differential gear mechanism 3, horizontally so that the crankshaft 6 of the engine 5 is approximately right- angled to the advancing direction of the automobile as well as the axis 8 of a cylinder bore 7 in each cylinder is inclined frontward by an appropriate angle thetain relation to the vertical surface 9 including the crankshaft axis from the view of the direction of the crankshaft 6. A transmission mechanism 10 is then disposed more on the rear side than the engine 5 as well as at a higher part than the differential gear mechanism 3, in such a way that an input and an output shafts 11, 12 in the transmission mechanism 10 are parallel to the crankshaft 6.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a power unit device for driving the vehicle in a front engine/front drive type vehicle, in which a plurality of cylinders are arranged in a straight line as an engine. The present invention relates to a power unit device using an in-line multi-cylinder engine that can be installed in a powerful in-line multi-cylinder engine.

[Conventional technology]

Generally, if the car is a regular car with a displacement of 1000 cc or more, even if the engine used for the front engine/front drive power unit is an in-line 4-cylinder engine, the crank of the in-line 4-cylinder engine is Since the length in the axial direction is relatively short compared to the internal width of the engine room, this 4-cylinder engine can be placed in the front with the transmission mechanism directly connected to one end of the engine. It can be mounted horizontally in the room (that is, with the crank axis oriented horizontally at approximately right angles to the direction of travel of the automobile).

In addition, if the vehicle is a light vehicle with a displacement smaller than the above, even if the engine used for the Freon 1-engine front drive power uniso I device is an in-line 3-cylinder engine, the in-line type Since the length of the three-cylinder engine in the crankshaft direction is relatively short compared to the internal width of the engine room, the front end of the three-cylinder engine is connected directly to the transmission mechanism. - Can be mounted horizontally in the engine room.

However, if the engine in a regular car is an in-line multi-cylinder engine with five or more cylinders, and if the engine in a light car is an in-line multi-cylinder engine with four or more 20 cylinders. In this case, the length of these engines in the crankshaft direction is significantly longer than the internal width of the engine compartment, so it is recommended to use an in-line type with five or more cylinders as described above. When a multi-cylinder engine is applied to the power unit device of the above-mentioned ordinary car or light car, the engine is directly connected to one end of the engine with a driving transmission mechanism connected to the fluorocarbon 1.
-It cannot be installed in the Yokoyama J due to engine room issues.

Therefore, in the past, an in-line multi-cylinder engine with five or four or more cylinders was applied to a power unit system in a Freon l engine, Freon one drive type ordinary car or light car. In some cases, the multi-cylinder engine is made into a V-type engine, the length in the crankshaft direction is reduced, and the engine is mounted horizontally in the engine room, or the in-line multi-cylinder engine is It is mounted vertically in the engine room (in other words, the crank axis is oriented vertically, almost parallel to the direction of movement of the automatic military), with the running tension mechanism directly connected to one end of the engine. .

[Problem to be solved by the invention]

j However, replacing the multi-cylinder engine mounted horizontally like the former with an expensive V-type engine will result in a significant increase in price.

On the other hand, like the latter, an in-line multi-cylinder engine with five or more cylinders is installed vertically in the engine compartment of a regular or light vehicle with a driving transmission mechanism directly connected to one end. Mounting it in the opposite direction avoids the need for an amplifier that costs a lot of money, but on the other hand, the total length of the power unisol device, that is, the total length from the front end of the engine to the rear end of the running tension mechanism, becomes significantly longer, which reduces the rigidity of the power unisol device. Not only does this significantly reduce the vibration of the vehicle body, but the longitudinal dimensions of the engine compartment must be increased, resulting in an increase in the overall length of the vehicle. Since the overhang dimension from the drive shaft to the front end surface of the power unit device also increases, there is a problem in that the turning performance of the automobile deteriorates.

Furthermore, in the latter case, conventionally, in order to lower the height of the power unit, the drive shaft for the front wheels was configured to pass through the oil pan of the vertically mounted engine. In addition, the structure becomes extremely complicated, oil leakage occurs, and the efficiency of maintenance such as inspection and repair of the power unit 1 and equipment is greatly reduced.

It is an object of the present invention to provide a power unisolating device for a fluorocarbon 1 engine front drive automobile that eliminates these problems.

[Means to solve the problem]

In order to achieve this object, the present invention includes an in-line multi-cylinder engine mounted in an engine room at the front of an automobile, a traveling transmission mechanism having an input shaft and an output shaft for power from the engine, and a traveling transmission mechanism. In a power unit system 1 device comprising a differential gear mechanism that transmits power from an output shaft in the mechanism to a drive shaft for both left and right front wheels, the engine is connected to a portion on the front side of the differential gear mechanism 6. , the axis of the crankshaft in the engine is perpendicular to the direction of travel of the vehicle, and the axis of the cylinder bore in each cylinder includes the axis of the crankshaft when viewed from the direction of the axis of the crankshaft. The drive transmission mechanism is mounted so as to be tilted forward with respect to a vertical plane, and the input shaft and output of the drive transmission mechanism are mounted at a position rearward of the engine and higher than the differential gear mechanism. The shaft is disposed approximately parallel to the axis of the crankshaft in the engine.

[Action/effect of the invention]

When an in-line engine having a plurality of cylinders is installed horizontally in the engine room of an automobile, the driving transmission mechanism is placed behind the engine and higher than the differential gear mechanism, as described above. In the part,
By arranging the input shaft and output shaft of the traveling mission mechanism substantially parallel to the crankshaft of the engine, the in-line multi-cylinder engine and the traveling mission mechanism can overlap in the longitudinal direction thereof. As a result, the total length of the power unit 1/device in the crankshaft direction is much shorter than in the case where the traveling miso-generating mechanism is directly connected to one end of the in-line engine as described above.

Furthermore, by arranging the traveling transmission mechanism at a higher position than the differential gear mechanism, the traveling main solution and the differential gear mechanism are in rotation with respect to the traveling direction of the vehicle, so that the power unit The width dimension along the traveling direction of the vehicle can be narrowed, and the overhang dimension from the drive shaft for both front wheels to the front end face of the power unit can be reduced, as in the conventional case, by attaching the driving transmission to one end. It can be shorter than when an in-line multi-cylinder engine with directly connected mechanisms is mounted vertically.

Moreover, by mounting the in-line multi-cylinder engine so that the axis of each cylinder bore is inclined forward with respect to the vertical plane when viewed from the direction of the crankshaft, the height of the power unit 1/device can be reduced. The drive shaft for the front wheels passes through the oil pan in the engine, without increasing the width dimension along the traveling direction of the vehicle in the power uni-soto device and the overhung dimension in the power uni-soto device, and as in the conventional case. Rather than arranging to do so, it can be made lower.

Therefore, according to the present invention, when a power unisolating device using an in-line multi-cylinder engine having a plurality of cylinders is installed horizontally in a fluorocarbon engine room, the structure of the power unisolating device becomes complicated, oil It is possible to reduce the size without causing leakage and difficulty in maintenance, and also has the effect of significantly improving the rigidity and reducing the overhang dimension.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 indicates a body frame of an automobile, reference numeral 2 indicates front wheels 9 on both left and right sides of the automobile, and reference numeral 3 indicates a space between the two front wheels 2. The reference numeral 4 indicates a drive shaft for transmitting power from the differential gear mechanism 3 to both front wheels 2.

Reference numeral 5 designates an in-line multi-cylinder engine in which six cylinders are arranged in a straight line. The cylinder pores 7 in each cylinder
The crankshaft 6 is mounted so that its axis 8 is tilted forward by an appropriate angle (θ) with respect to a vertical plane 9 including the crankshaft 6 when viewed from the direction of the crankshaft 6.

Reference numeral 10 indicates an input shaft 11, an output shaft 12, and both shafts 11.
, 12, the traveling mission mechanism is operated by a plurality of gear trains provided between 10 and 12.
The input shaft 11 and output shaft 12 of the traveling mission mechanism 10 are located behind the engine 5 and higher than the differential gear mechanism 3, and the input shaft 11 and the output shaft 12 of the engine 5 are referred to as a crank shaft 6. Arrange them so that they are parallel.

In addition, the input shaft l1 in the traveling mechanism 10
, a flyboil 3 for the engine 5 is rotatably provided, and a silent chain 1 is provided between the flyboil 13 and the crankshaft 6 of the engine 5.
4 is wound around the crankshaft 6 to transmit the rotation of the crankshaft 6 to the flywheel 13. A clutch mechanism 15 for intermittent transmission of power is provided between the flywheel l3 and the input shaft 1; The pinion gear 1G fitted on the differential gear mechanism 12 is meshed with the final driven gear 17 of the differential gear mechanism 3, thereby transmitting power to the differential gear mechanism 3.

In this configuration, when the crankshaft 6 rotates due to starting of the engine 5, the flywheel 13 rotates in conjunction with this rotation. Therefore, the power transmission is turned ON for the Kurasochi mechanism 15.
When the operation is performed, the rotation is transmitted to the input shaft 11 of the traveling transmission mechanism 19, and this rotation is shifted to an appropriate speed by a plurality of gear trains between the input shaft 11 and the output shaft 12, and then transferred to the differential drive. The signal is transmitted to the vehicle mechanism 3, and both the left and right front vehicle shafts 2 are rotationally driven, so that the vehicle travels forward.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the front part of an automobile, and FIG. 2 is a developed sectional view taken along the line 1--2 of FIG. 1...Vehicle frame, 2...Front wheel, 3...
・Differential gear mechanism, 4...Drive shaft, 5...Engine, 6...Crankshaft, 7...Cylinder bore, 8...Cylinder bore axis, 9... Vertical plane, 10... Traveling mission mechanism, 11... Input shaft, 12... Output shaft, l3... Fly point, I4... Siren 1 chain, 15... Clasochi mechanism, 16...pinion gear, 17...final drive wheel.

Claims (1)

[Claims] (1) An in-line multi-cylinder engine mounted in the engine room at the front of the automobile, a travel transmission mechanism having an input shaft and an output shaft for the power from the engine, and a travel transmission mechanism that receives the power from the output shaft of the travel transmission mechanism. In a power unit device comprising a differential gear mechanism that transmits power to a drive shaft to both left and right front wheels, the engine is located at a position on the front side of the differential gear mechanism, and the engine is located at a position on the front side of the differential gear mechanism, and the crankshaft of the engine is The axis is horizontal and substantially perpendicular to the direction of travel of the vehicle, and the axis of the cylinder bore in each cylinder is inclined forward with respect to a vertical plane including the axis of the crankshaft when viewed from the direction of the axis of the crankshaft. At the same time, the traveling mission mechanism is mounted at a location rearward of the engine and higher than the differential gear mechanism, and the input shaft and output shaft of the traveling mission mechanism are approximately parallel to the axis of the crankshaft of the engine. A power unit device for an automobile, characterized in that the power unit device is arranged in parallel.