JPH01110830A - Horizontally opposed type engine - Google Patents

Abstract

PURPOSE:To increase the output of an engine by simplifying the shape of an exhaust pipe by installing each oil pan on the right and left side cylinder head sides and installing a supercharger behind each bank. CONSTITUTION:As for a horizontally opposed type engine equipped with the right and left cylinder heads 2, the lateral width of an oil pan 3a in the integral constitution with a crankcase 3 is reduced drastically, and another oil pan 15 is installed on the lower side of each cylinder head 2, and lubrication is achieved on the cylinder head side by an oil pump. A supercharger 11 and an exhaust turbine 11a for driving the exhaust turbine 11 are installed behind each bank, and each exhaust turbine 11a communicates to the exhaust pipes 18 of the right and left cylinders. When the engine is thus constituted, a sufficient space is for the pass of the exhaust pipe 18 is secured under each bank, and the exhaust pipe 18 is arranged in reasonable form. Thus the hydrodynamics loss can be eliminated. Therefore, the efficiency of the supercharger 11 can be improved, and the output of the engine can be improved.

Description

[Detailed description of the invention] [Industrial application field]

The present invention is directed to a horizontally opposed engine with a supercharger.

[Conventional technology]

In a conventional horizontally opposed engine, when using a supercharger to increase air filling efficiency and increase engine output, the supercharger is installed at the rear of one bank, and the exhaust port on that bank side is installed. The exhaust gas taken out from the bank is supplied from the exhaust pipe to the exhaust turbine of the supercharger, but the exhaust gas taken out from the exhaust port on the opposite bank is supplied from the exhaust pipe to the exhaust turbine of the supercharger. Since it is detoured from the front of the engine to the other side bank and joins the above-mentioned exhaust pipe here, there is a large hydrodynamic loss. In addition, in the above-mentioned horizontally opposed engine, a pump is used from the oil pan to lubricate the crankshaft, cylinder head, and valve train, and oil is returned from each bank to the oil pan. Therefore, it was necessary to greatly expand the oil pan from side to side to ensure smooth return of oil from each bank. Furthermore, since the oil pan was generally made of sheet metal, the engine mounts were placed on the left and right sides of the oil pan. For this reason, the space under each bank is extremely narrow.
The reality is that the exhaust pipe cannot be routed without making a large bend to avoid interference with the engine mount or cross member, and this also causes large hydrodynamic losses in the exhaust. (WIi problem to be solved by the invention) In this way, when a horizontally opposed engine uses a supercharger and an exhaust turbine is used as its power source, the exhaust pipe must be routed around and the exhaust pipe must be forced to bend. The present invention has been made based on the above-mentioned circumstances, and the present invention has been developed to improve the type of oil lubrication so that sufficient space can be secured under the left and right banks of the engine. In addition, by installing a turbocharger for each bank, the horizontally opposed system simplifies the routing of the exhaust pipe, creates an exhaust system with no hydrodynamic loss, and increases the efficiency of the turbocharger. The aim is to provide an engine.

[Means to solve the problem]

Therefore, in the present invention, in a horizontally opposed engine in which an oil pan is provided under the crankcase and cylinder heads are provided on the left and right sides of the crankcase, the oil pan is provided on each of the cylinder head sides, and the oil pan is provided on the crankcase side and cylinder head side. The head side is configured to be independent 1rlIIW4, the engine mount is installed on the lower surface of the oil pan under the crankcase, a supercharger is installed on the rear side of each bank of the engine, and the exhaust of the supercharger is installed on the rear side of each bank of the engine. The turbine is connected to left and right exhaust pipes led out from the exhaust port of each bank.

[For production]

Therefore, the width of the oil pan under the crankcase can be reduced to the extent that it does not interfere with the engine mount.Each bank has an independent oil pan, and each bank is pumped with oil, so the width of the oil pan under each bank can be reduced to the extent that it does not interfere with the engine mount. This will ensure sufficient space for the exhaust pipe to pass through. Therefore, even when the exhaust pipe is arranged avoiding the cross member, the exhaust pipe can be extended with a sufficiently large radius of curvature, and a configuration with less hydrodynamic loss can be achieved. In addition, since each bank is equipped with a turbocharger at the rear, the exhaust pipes for each bank can be connected to the respective exhaust turbines, eliminating the need for complicated exhaust pipe routing and reducing hydrodynamic losses. It will be resolved.

【Example】

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, reference numeral 1 is the engine body equipped with cylinder heads 2゜2 on the left and right, and a crankcase 3 in the center.
．． An oil pan 3a integrated therewith is installed on the lower side thereof. Auxiliary machines such as an alternator 4 and a compressor 5 are installed on the front side of the upper part of the crankcase 3, and are designed to receive driving force from the crankshaft via a belt transmission system 6. Moreover, on the rear side of the alternator 4 and compressor 5,
A water-cooled intercooler 7 is installed in the upper part of the crankcase 3.
is installed, and the intake pipes 8 installed on the left and right banks
．． 8 through throttle chambers 9.9 installed corresponding to each bank. The water-cooled intercooler 7 is internally divided into left and right sections, and air is supplied to each section from an air supply pipe 10 disposed at the upper center of the water-cooled intercooler 7. Further, the air supply pipe 10 includes a supercharger 1111 arranged tangentially to the left and right banks.
．． 11 through an air supply pipe 12.12 that merges in the center, and the supercharging vs11.11 communicates with an air cleaner (not shown) via an air supply pipe 13.13 that merges in the center. The intake pipe 8.8 extends in the front-rear direction and communicates with the intake ports 14 in the cylinder head via branch pipes 8a. On the other hand, an oil pan 15.15 is constructed below each of the cylinder heads 2.2, and a crankcase 3.
Independently from oil lubrication using an oil pan 3a on the side, independent rA slipping on the cylinder head side is achieved using an oil pump driven by a camshaft or the like. For this reason, the left and right width of the oil pan 3a is reduced as much as possible, and a large space is secured below each bank between it and the cross member 17. In this embodiment, since the cylinder head side is independent rIJ, the distance 111H from the cylinder center line to the lower side of the crankcase 3 can be made smaller, and the lower side of the bank required to accommodate the exhaust pipe can be made larger. ing. An engine mount 16 is mounted on the oil pan 3a.
is installed on the cross member 17. In addition, the exhaust pipe 18 that corresponds to each bank and communicates with the intake port has a detour shape with a large radius of curvature that makes the most of the above-mentioned dimensions, and is connected to the exhaust turbines 11a and 11a in the aforementioned supercharger 11.11. is communicated with. In the figure, reference numeral 19 is an intake pulp, 20 is an exhaust valve, 21 is a fuel injection valve, and 22 is a throttle valve disposed within the throttle chamber 9. In such a configuration, the exhaust pipe 18 is independently rIJWi for each cylinder block, and in order to install the engine mount to the central oil pan,
By sufficiently expanding the space under each bank, the piping can be laid in a shape that allows for easy bending, reducing hydrodynamic losses and supplying sufficient kinetic energy to the exhaust turbine 11a. Become. Moreover, the exhaust pipe 18 has a supercharger 11.1 corresponding to each bank.
Since the exhaust pipe is connected to the exhaust turbines 11a and 11a of No. 1, there is no need to route the exhaust pipe around the front side of the engine to the exhaust system of the opposite bank, as in the conventional case, so there is no hydrodynamic loss caused by this. disappears.

【Effect of the invention】

As described in detail above, the present invention has improved the oil lubrication format to ensure sufficient space under the left and right banks of the engine, and installed a supercharger for each bank to improve the exhaust gas. Hydrodynamic losses in the pipes are reduced, the efficiency of the supercharger is increased, and higher engine output is achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
FIG. 3 is a front view showing the arrangement of the exhaust system, and FIG. 3 is a side view showing the exhaust system. 1...Engine body, 2...Cylinder head, 3.
...Crankcase, 3a...Oil pan, 15...
・Oil pan, 1G...Engine mount, 17...
- Cross member, 18...exhaust pipe, 11...supercharger, 11a...exhaust turbine. Patent applicant: Fuji Heavy Industries Co., Ltd. Agent: Patent attorney: Makoto Komaki, Ukiyo Patent attorney: Susumu Murai

Claims (1)

[Claims] In a horizontally opposed engine in which an oil pan is installed under the crankcase and cylinder heads are installed on the left and right sides of the crankcase, an oil pan is installed in each of the cylinder heads, and the crankcase side and cylinder head side are independently lubricated. At the same time, the engine mount is installed at the bottom of the oil pan at the bottom of the crankcase, a supercharger is installed at the rear of each bank of the engine, and the exhaust turbine of the supercharger is led out from the exhaust port of each bank. A horizontally opposed engine characterized by having left and right exhaust pipes connected to each other.