JPH0338018Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a power unit arrangement structure in an automobile.

In automobiles equipped with a horizontally opposed engine, by utilizing the longitudinal misalignment between the left bank and right bank of the horizontally opposed engine, and by placing a radiator in front of the bank on the side that is retracted to the rear, A device with a shortened overhang was previously developed by the present applicant and is already known in Japanese Patent Publication No. 56-15327.

The present invention further develops the idea of the above-mentioned prior art and aims to shorten the overall length of the power unit by utilizing the deviation of the left and right banks in the longitudinal direction of the vehicle body. Explain with reference to an example.

In the figure, reference numeral 14 is an OHC (overhead camshaft) type horizontally opposed engine, and as shown in the first figure in the plan view of the engine 14, the left bank and the right bank are relative to the center line in the longitudinal direction of the vehicle body. The front surface of the engine 14 has a stepped shape in the front and back direction between the left and right sides.

In the present invention, the left and right timing belts 8 and 7, which transmit the power of the crankshaft located at the center of the engine to the left and right camshafts located at the tops of the left and right banks, respectively, are placed close to each other in front of the left bank and the right bank, respectively. For example, the side recessed to the rear of the front surface of the engine 14
The timing belt 8 on the left bank side in the illustration is disposed so as to fit within the retraction space α, and
On the front part of that side are pulleys for each auxiliary equipment, idler pulley 6, and crank pulley for driving auxiliary equipment such as the water pump 2, alternator 3, compressor 4 of the air conditioner, and oil pump 5 of the power steering device. By installing a power transmission device for driving auxiliary equipment consisting of V-belts 9, 10, etc. suspended between the engine 14, the transmission 15, and the various auxiliary equipment mentioned above, the total length of the power unit can be shortened. In addition, the radiator fan 13 of the radiator 12 disposed on the front surface of the power unit is disposed on the front side of the timing belt 7 on the side projecting forward from the front of the engine 14, for example, on the right bank side in the first figure. As a result, the radiator fan 13 is located in the stepped space b between the timing belt 7 on the right bank side and the power transmission device for driving auxiliary equipment on the front side of the left bank,
The gap between the power unit and the radiator 12 can be narrowed significantly compared to the conventional one, and the length of the front part of the vehicle body in the longitudinal direction can be shortened, and the minimum turning radius of the vehicle body can be reduced accordingly. This is what I did. In FIG. 1, 11 is a timing belt cover, and 16 is a body side frame.

As mentioned above, in the present invention, the steps in the front and rear directions of the left and right banks of the horizontally opposed engine are utilized, and the timing belt on the side that is retracted rearward is arranged so as to fit within the retraction space created by the steps. In addition, drive power transmission devices such as pulleys and V-belts for driving auxiliary machinery are arranged on the front side, and the front and back sides of the power transmission device for driving auxiliary machinery and the timing belt on the side that protrudes forward from the front of the engine are installed. By utilizing the step in the direction and arranging the radiator fan on the front side of the timing belt on the projecting side, the overall length of the power unit including the engine can be shortened and the layout of auxiliary equipment can be made more compact. , it is possible to shorten the length of the front part of the vehicle body in the longitudinal direction, expand the degree of freedom in designing the entire vehicle body, reduce the minimum turning radius of the vehicle body, and reduce the weight of the vehicle body, which has many practical effects. It is possible to bring about

[Brief explanation of the drawing]

FIG. 1 is an explanatory plan view showing an embodiment of the present invention, and FIG. 2 is an explanatory front view showing an example of the arrangement of the auxiliary equipment shown in FIG. 1...Crank pulley, 2...Water pump, 3
... Alternator, 4... Compressor, 5... Oil pump, 7, 8... Timing belt, 9, 10...
V-belt, 12...Radiator, 13...Radiator fan, 14...Engine, 15...Transmission.

Claims (1)

[Scope of utility model registration request] A horizontally opposed engine has a crankshaft installed at the center of the engine, and a left bank and a right bank, each having a camshaft at the top, are offset in the front-rear direction. In the automobile, the left and right timing belts, which respectively transmit the power of the crankshaft to the camshaft, are arranged close to the front surfaces of the left bank and the right bank, respectively, and the side that is retracted rearward. A power transmission device such as a pulley for driving auxiliary equipment, a V-belt, etc. is arranged on the front side of the timing belt, and the power transmission device is placed in the space formed by the front side of the timing belt protruding forward and the radiator. An automobile power unit arrangement structure characterized by a radiator fan.