CN108317007B

CN108317007B - High-power V-shaped 12-cylinder diesel engine

Info

Publication number: CN108317007B
Application number: CN201810123073.8A
Authority: CN
Inventors: 沈捷; 黄永仲; 黄第云; 毛平安; 谢夏琳
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2018-02-07
Filing date: 2018-02-07
Publication date: 2023-05-26
Anticipated expiration: 2038-02-07
Also published as: CN108317007A

Abstract

The invention discloses a high-power V-shaped 12-cylinder diesel engine, which comprises a V-shaped cylinder body and 12 single cylinder covers; the oil supply system comprises a left oil pipe and a right oil pipe, and the left oil pipe and the right oil pipe are correspondingly connected with 12 electric control unit pumps through vertical high-pressure oil pipes respectively; an air inlet system for supplying fresh air to the high-power V-12 cylinder diesel engine; a lubrication system; and a cooling system including a high-temperature water circulation circuit including a rear radiator and a low-temperature water pump, the low-temperature water circulation circuit being used to cool the engine oil cooler, and the high-temperature water circulation circuit including a front radiator and a high-temperature water pump, the high-temperature water circulation circuit being used to cool the V-block and the 12 single cylinder heads. The machine body is compact, high in power and high in torque.

Description

High-power V-shaped 12-cylinder diesel engine

Technical Field

The invention relates to the field of engines, in particular to a high-power V-shaped 12-cylinder diesel engine.

Background

The high-power high-speed diesel engine is generally applied to generator stations, petrochemical industry, high-speed light ships, ships and vessels and the like. Basically, the four-stroke engine is a high-power high-speed diesel engine, and has high single-machine power, so that the high-load requirement is higher than that of a common diesel engine, and the average effective pressure of the high-speed diesel engine is up to 3MPa and the highest detonation pressure is up to 20MPa for an advanced foreign high-speed diesel engine. Because the high-power high-speed diesel engine has the characteristics of high power and high torque, the requirements on several important key systems are relatively high, such as a cylinder assembly system, a power system, a diesel oil system, a cooling system, a lubricating system and the like.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The invention aims to provide a high-power V-shaped 12-cylinder diesel engine which is compact in engine body, high in power and large in torque.

In order to achieve the above object, the present invention provides a high-power V-shaped 12-cylinder diesel engine, comprising: a V-shaped cylinder block, on which 12 two rows of cylinder bores are arranged in a V-shaped arrangement, the included angle between the two rows of cylinder bores is 90 degrees, and sleeves corresponding to the number of cylinder bores are respectively cast on the V-shaped cylinder block outside the two rows of cylinder bores; 12 single cylinder heads which are respectively and correspondingly arranged at the cylinder opening part of the V-shaped cylinder body; the oil supply system comprises a diesel tank, an oil supply pipeline and 12 electric control unit pumps, wherein the 12 electric control unit pumps are respectively and correspondingly arranged in a sleeve, the 12 electric control unit pumps are respectively used for controlling the injection of diesel oil to each cylinder, the diesel tank is communicated with the oil supply pipeline, the oil supply pipeline comprises a left side oil pipe and a right side oil pipe, and the left side oil pipe and the right side oil pipe are respectively and correspondingly connected through a vertical high-pressure oil pipe and the 12 electric control unit pumps; an air inlet system for supplying fresh air to the high-power V-12 cylinder diesel engine; the lubricating system comprises an oil pan, a pre-supply oil pump, an oil filter and an oil cooler, wherein the oil pan is arranged at the bottom of the V-shaped cylinder block, the pre-supply oil pump is arranged at the front side of the oil pan, the oil pump is arranged at the left lower position of the front end of the V-shaped cylinder block, and the oil filter and the oil cooler are both arranged at the left upper position of the front end of the V-shaped cylinder block; and a cooling system including a high-temperature water circulation circuit including a rear radiator and a low-temperature water pump, the low-temperature water circulation circuit being used to cool the engine oil cooler, and the high-temperature water circulation circuit including a front radiator and a high-temperature water pump, the high-temperature water circulation circuit being used to cool the V-block and the 12 single cylinder heads.

Preferably, pistons with W combustion chambers are arranged in two rows of cylinder bores of the V-shaped cylinder block, an internal cooling oil duct is arranged in the pistons, and four ring grooves are formed in the circumferential wall of each piston.

Preferably, the air intake system comprises a left side air inlet pipe, a right side air inlet pipe, a left side supercharger, a right side supercharger, a left side intercooler and a right side intercooler, wherein the left side intercooler and the right side intercooler are respectively arranged on two sides above the rear end of the V-shaped cylinder body, the left side supercharger and the right side supercharger are correspondingly arranged above the left side intercooler and the right side intercooler and are respectively protruded out of the top of the V-shaped cylinder body, the left side supercharger is connected with a left side air filter, the right side supercharger is connected with a right side air filter, and the left side air inlet pipe and the right side air inlet pipe are respectively communicated with the left side intercooler and the right side intercooler and then are arranged at the upper end positions of two sides of the V-shaped cylinder body.

Preferably, the low-temperature water pump is arranged at a position, close to the upper part of the oil pump, of the front end of the V-shaped cylinder block, the high-temperature water pump is arranged at a position, close to the upper part of the diesel distributor, of the front end of the V-shaped cylinder block, the low-temperature water pump, the high-temperature water pump, the oil pump and the diesel distributor surround the crank pulley, the crank pulley drives the low-temperature water pump and the high-temperature water pump respectively, cooling liquid flowing through the V-shaped cylinder block and the 12 single cylinder heads enters the front radiator through the water outlet header pipe, three parallel-connection thermostats are connected between the water outlet header pipe and the front radiator, the thermostats are arranged at the right upper part of the front end of the V-shaped cylinder block and are communicated with the front radiator through radiator water pipes, and the radiator water pipes are arranged at the top of the V-shaped cylinder block.

Preferably, the low-temperature water circulation circuit includes a low-temperature water distributor fixed at a position where the front end of the V-block is close to above the crank pulley, and the low-temperature cooling water in the low-temperature water pump is distributed to the engine oil cooler and the left and right intercoolers via the low-temperature water distributor.

Preferably, the left intercooler and the right intercooler are square shells, an air circulation cavity is formed in the square shells around the air circulation cavity, a cooling liquid flow channel is formed in the square shells around the air circulation cavity, an additional shell is arranged on the front side of the square shells, an intermediate shell is arranged between the left intercooler and the right intercooler, two sides of the intermediate shell are respectively connected with inner side end faces of the additional shells of the left intercooler and the right intercooler, a circulation channel communicated with the cooling liquid flow channel inside the left intercooler and the right intercooler is arranged in the additional shells and the intermediate shell, and a water inlet and a water outlet of the circulation channel are arranged on the front end faces of the intermediate shells and are communicated with a low-temperature water distributor through water pipes.

Preferably, the diesel supply system further comprises a diesel distributor, the diesel distributor is fixed at the front end of the V-shaped cylinder body, diesel in the diesel tank is respectively communicated with the left side oil pipe and the right side oil pipe through the diesel distributor, diesel filters are respectively connected into the left side oil pipe and the right side oil pipe, and the diesel filters on the left side and the right side are respectively arranged on two sides of the V-shaped cylinder body.

Preferably, the diesel supply system further comprises an oil transfer pump and a diesel filter, wherein the oil transfer pump is connected between the diesel tank and the diesel filter, the diesel filter is respectively communicated with the left oil pipe and the right oil pipe, the oil transfer pump is fixed below the right of the front end of the V-shaped cylinder body, and the diesel filter is fixed on the right side of the V-shaped cylinder body.

Preferably, the ratio of stroke to cylinder diameter of the high power V12 cylinder diesel engine is 1.1-1.3.

Preferably, the ratio of the center distance between adjacent cylinders of the high-power V-shaped 12-cylinder diesel engine to the cylinder diameter is 1.3-1.45.

Compared with the prior art, the invention has the following beneficial effects: through setting up V-arrangement cylinder body, 12 monomer cylinder heads, diesel oil feed system realizes two side fuel feeding, two sets of supercharged intercooler of air intake system support, and compressed air makes its density further improve through cooling, is favorable to improving the power of engine, improves the performance, and cooling system adopts high low temperature water separately cooling, and high temperature and low temperature part classification cooling like this can reduce air intake temperature and engine oil temperature, reduces heat energy loss simultaneously, and the engine saves more oil, satisfies high power, the requirement of big moment of torsion of high-power V-arrangement 12 jar diesel engine, and the organism is compacter, and intensity is big.

Drawings

FIG. 1 is a schematic view of the structure of a V-block of a high power V-12 cylinder diesel engine according to the present invention;

FIG. 2 is a schematic view of a construction in which a single cylinder head is disposed on a V-block of a high power V-12 cylinder diesel engine according to the present invention;

FIG. 3 is a diagram of the overall structure of a high power V-12 cylinder diesel engine according to the present invention;

FIG. 4 is a block diagram of an oil supply line in a high power V-12 cylinder diesel engine according to the present invention;

FIG. 5 is a block diagram of another oil supply line in a high power V-12 cylinder diesel engine according to the present invention;

FIG. 6 is a schematic diagram of a cooling system for a high power V-12 cylinder diesel engine according to the present invention;

fig. 7 is a structural view of an intercooler in a high power V-type 12 cylinder diesel engine according to the present invention.

Detailed Description

The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

According to the high-power V-shaped 12-cylinder diesel engine, in order to meet the requirements of high power and high torque of a high-power high-speed diesel engine, the scheme provides the high-power V-shaped 12-cylinder diesel engine, and the high-power V-shaped 12-cylinder diesel engine is improved from a cylinder body assembly system, a power system, a fuel system, a cooling system and a lubrication system. The electric control unit pump technology is adopted, the injection pressure is high, the injection quantity can be accurately and dynamically adjusted, the diesel engine is guaranteed to be atomized well, combusted fully, the transient speed regulation performance is good, the loading capacity is strong, the oil consumption is low, and the minimum fuel consumption rate reaches 195 g/kW.h under the condition of different loads. The electric control unit pump with one cylinder is adopted, the pressure at the pump end is high, the control is simple, the electric control unit pump is matched with an oil sprayer with high injection pressure, the atomization is good, the combustion is sufficient, the oil consumption is low, and each unit pump is provided with a correction code, so that the consistency is ensured. The design of one cover of each cylinder has high strength. The high-low temperature water is adopted for cooling separately, the low temperature water is adopted for cooling the two intercoolers and the engine oil cooler, and the high temperature water is adopted for cooling the cylinder body and the cylinder cover. And the diesel oil supply system, the air inlet system, the lubricating system and the cooling system are reasonably arranged on the engine body, so that the engine body is more compact while the strength is high, the power is high and the torque is high.

Specifically, as shown in fig. 1 to 3, a high-power V-shaped 12-cylinder diesel engine according to an embodiment of the present invention includes a V-

shaped cylinder block

100, 12 single cylinder heads 200, a diesel supply system, an intake system, a lubrication system, and a cooling system, wherein 12 two banks of cylinder bores arranged in a V-shape are arranged on the V-shaped cylinder block 100, an included angle between the two banks of cylinder bores of the V-shaped cylinder block 100 is 90 degrees, sleeves corresponding to the number of cylinder bores are cast on the V-shaped cylinder block 100 outside the two banks of cylinder bores, and the 12 single cylinder heads 200 are mounted at the cylinder port portions of the V-shaped cylinder block 100, respectively. The diesel supply system comprises 12 electric control unit pumps 14, a diesel tank and an oil supply pipeline, wherein the 12 electric control unit pumps 14 are respectively and correspondingly arranged in the sleeve, the 12 electric control unit pumps 14 are respectively used for controlling the injection of diesel to each cylinder, the diesel tank is communicated with the oil supply pipeline, and the embodiment provides two specific oil supply pipelines (see below in detail). In general, the oil supply pipeline comprises a left oil pipe and a right oil pipe, and the left oil pipe and the right oil pipe are correspondingly connected with 12 electric control unit pumps through vertical high-pressure oil pipes respectively. The air inlet system is used for supplying fresh air to the high-power V-shaped 12-cylinder diesel engine. The lubrication system comprises an oil pan, a pre-supply oil pump 7, an oil pump 5, an oil filter 2 and an oil cooler 1, wherein the oil pan is arranged at the bottom of the V-shaped cylinder block 100, the pre-supply oil pump 7 is arranged at the front side of the oil pan, the oil pump 5 is arranged at the left lower position of the front end of the V-shaped cylinder block 100, and the oil filter 2 and the oil cooler 1 are both arranged at the left upper position of the front end of the V-shaped cylinder block 100. The cooling system includes a high-temperature water circulation circuit including a rear radiator and a low-temperature water pump 4 for cooling the engine oil cooler 1, and a high-temperature water circulation circuit including a front radiator and a high-temperature water pump 9 for cooling the V-

block

100 and 12 single cylinder heads.

As a preferred embodiment, pistons with W combustion chambers are provided in two rows of cylinder bores of the V-shaped cylinder block 100, an internal cooling oil passage is provided in the piston, and four ring grooves are provided on the circumferential wall of the piston. In the scheme, the W combustion chamber technology is adopted, so that the air inflow is large, the mixing is uniform, the combustion is more sufficient, and the power range area with low oil consumption is wide. The piston adopts an internal cooling oil duct structure, so that the cooling is good, the four-ring groove structure is adopted, and the sealing effect is better.

As shown in fig. 4 and 5, this embodiment provides two specific diesel supply systems, fig. 4 shows one of the diesel supply lines, and in combination with fig. 3, the diesel supply system includes 12 electric control unit pumps 14, a diesel tank and an oil supply line, the 12 electric control unit pumps 14 are respectively used to control injection of diesel into each cylinder, the diesel tank and the oil supply line are communicated, the oil supply line includes a left side oil pipe 43 and a right side oil pipe 42, the right side oil pipe 42 and the left side oil pipe 43 are respectively connected by a vertical high

pressure oil pipe

46 and 12 electric control unit pumps, the diesel supply system further includes a diesel distributor 49, the diesel distributor 49 is fixed at the front end of the V-shaped cylinder block 100, diesel in the diesel tank is respectively communicated with the right side oil pipe 42 and the left side oil pipe 43 via the diesel distributor 49, and diesel filters on the left side and the right side are respectively connected in the right side oil pipe 42 and the left side oil pipe 43, and the left side diesel filters are respectively mounted on both sides of the V-shaped cylinder block 100 (see fig. 3, the right side diesel filter 11 is shown). In this diesel supply line, the fuel pump 8 (see fig. 3) pumps diesel fuel into the diesel fuel distributor 49 through the fuel pipe 41, and diesel fuel in the diesel fuel distributor 49 is connected to the right side fuel pipe 42 and the left side fuel pipe 43 in two branches, respectively, and the joints in the lines of the right side fuel pipe 42 and the left side fuel pipe 43 are connected to the corresponding diesel fuel filters, see fig. 4. The right side oil pipe 42 and the left side oil pipe 43 are respectively connected with corresponding electric control unit pumps through an upright high-pressure oil pipe 46 and a high-pressure connecting pipe 47, return oil of the electric control unit pumps flows back into overflow valves through a left side oil return pipe 45 and a right side oil return pipe 44 respectively, and the overflow valves are integrated in a diesel distributor 49. In addition, the high-pressure oil pipe 46 and the high-pressure adapter pipe 47 of the present embodiment are fixed at positions near the cylinder head on both sides of the V-block 100 by brackets 48.

As shown in fig. 5, fig. 5 shows another diesel supply line of the present embodiment, and in combination with fig. 3, the diesel supply system further includes an oil pump 8 and a diesel filter 11, the oil pump 8 is connected between the diesel tank and the diesel filter 11, diesel in the diesel tank is input into the diesel filter 11 through the oil pipe 31 by the oil pump 8, the diesel filter 11 has two outlets respectively communicating with the left side oil pipe 32 and the right side oil pipe 33, the oil pump 8 is fixed at the right lower side of the front end of the V-shaped cylinder block 100 (see fig. 3), the diesel filter 11 is fixed at the right side of the V-shaped cylinder block 100, and fig. 3 shows a second diesel supply line. The left side oil pipe 32 and the right side oil pipe 33 are respectively and correspondingly connected with the electric control unit pump through the vertical high-pressure oil pipe 36 and the high-pressure connecting pipe 37, and return oil of the electric control unit pump flows back into the overflow valve 39 through the left side oil return pipe 35 and the right side oil return pipe 34. In addition, the high-pressure oil pipe 36 and the high-pressure adapter pipe 37 of the present embodiment are fixed to both sides of the V-block 100 near the cylinder head by brackets 38.

As a preferred embodiment, as shown in fig. 3, the intake pipe, supercharger, intercooler, air cleaner and exhaust pipe which are present are partially labeled in fig. 3. The air intake system includes left side air intake pipe, right side air intake pipe 15, left side booster, right side booster 18, left side intercooler and right side intercooler 16 are installed respectively in the both sides of V-arrangement cylinder block 100 rear end top, left side booster and right side booster 18 are installed respectively in the top of left side intercooler and right side intercooler 16 and all bulge V-arrangement cylinder block 100, be connected with left side air cleaner on the left side booster, be connected with right side air cleaner 17 on the right side booster 18, left side air intake pipe and right side air intake pipe 15 are arranged in the both sides upper end position of V-arrangement cylinder block 100 after putting through with left side intercooler and right side intercooler 16 respectively. The left supercharger is provided with a post-swirl exhaust pipe 19, and the right supercharger 18 is also provided with a post-swirl exhaust pipe. In practice, the high-power V-type 12-cylinder diesel engine further includes a corresponding exhaust system including exhaust pipes 21 (two left and right), the exhaust pipes 21 (two left and right) being connected to the left supercharger and the right supercharger, the exhaust pipes 21 (two left and right) being disposed at the top intermediate position of the V-block 100.

As a preferred embodiment, the low temperature water pump 4 is disposed at a position where the front end of the V-shaped cylinder block 100 is close to the upper side of the oil pump 5, the high temperature water pump 9 is disposed at the front end of the V-shaped cylinder block 100, the high temperature water pump 9 and the low temperature water pump 4 are disposed at both sides above the crank pulley, respectively, the low temperature water pump 4, the high temperature water pump 9, the oil pump 5 and the oil pump 8 are disposed around the crank pulley (the crank pulley is provided with the silica gel damper 6), the crank pulley drives the low temperature water pump 4 and the high temperature water pump 9, respectively, the cooling liquid flowing through the V-shaped cylinder block 100 and the 12 single cylinder heads 200 enters the front row radiator 242 via the water outlet header pipe, three thermostat 23 connected in parallel are connected between the water outlet header pipe and the front row radiator 242, the thermostat 23 is disposed at the upper right position of the front end of the V-shaped cylinder block 100, the radiator pipe 20 is communicated with the front row radiator 242, and the radiator pipe 20 is disposed at the top of the V-shaped cylinder block 100.

As shown in fig. 3 and 6, as a preferred embodiment, the low-temperature water circulation circuit includes a low-temperature water distributor 3, the low-temperature water distributor 3 being fixed to the front end of the V-block 100 at a position close to above the crank pulley, the low-temperature water distributor 3 being provided for the purpose of cooling the engine oil cooler 1 and the two intercoolers simultaneously. To this end, as shown in fig. 6, the embodiment proposes to use low-temperature water to cool the two intercoolers and the engine oil cooler 1 separately, and the high-temperature water to cool the cylinder block and the cylinder head, where the cooling system belongs to a forced closed circulation water cooling system, and the cooling liquid should use an anti-freezing and anti-rust cooling liquid. The high-temperature water and the low-temperature water are adopted for cooling separately, the two intercoolers and the engine oil cooler are cooled, the high-temperature water cools the cylinder body and the cylinder cover, the outlet water temperature of the high-temperature water is controlled at 75-95 ℃, and the engine oil temperature is controlled at 80-110 ℃ preferably. In this system, a water pump, a fan, a radiator, and an oil cooler are main components of a cooling system. When the engine runs, the crankshaft timing gear drives the high-low temperature water pump through the left idler gear and the right idler gear respectively to drive the water pump impeller to rotate, and the cooling liquid generates certain pressure under the action of the centrifugal force of the water pump and flows out from the water pump outlet. The cooling liquid pressed out by the high-temperature water pump enters the cooling water jackets of the cylinder body and the cylinder head, and after cooling the cylinder body and the cylinder head, the cooling liquid reaches the water outlet header pipe and flows into the radiator after passing through the thermostat. The thermostat is arranged at the end part of the water outlet pipe, the thermostat automatically controls the temperature, when the temperature of the cooling liquid is higher than 75 ℃, the thermostat is opened, when the temperature of the cooling liquid is higher than 85 ℃, the thermostat is fully opened, and at the moment, the cooling liquid completely enters the radiator and flows back to the water pump. If the temperature of the cooling liquid is less than 75 ℃, the cooling liquid directly flows to the water pump to be cooled again without being cooled by heat dissipation of a radiator. The low-temperature water pump cools the two intercoolers and the engine oil cooler, and then returns to the radiator for heat dissipation. The high-temperature and low-temperature components are cooled in a classified mode, so that the air inlet temperature and the engine oil temperature can be reduced, heat energy loss is reduced, and the engine is more oil-saving.

As shown in fig. 7, as a preferred embodiment, the present embodiment proposes a specific intercooler structure, the left intercooler and the right intercooler are square shells 501, the inside of the square shells 501 has an air circulation cavity, cooling liquid flow channels are arranged in the square shells around the air circulation cavity, an additional shell 502 is arranged on the front side of the square shells 501, an intermediate shell 503 is arranged between the left intercooler and the right intercooler, two sides of the intermediate shell 503 are respectively connected with inner side end surfaces of the additional shell 502 of the left intercooler and the right intercooler, circulation channels communicated with cooling liquid flow channels inside the left intercooler and the right intercooler are arranged in the additional shell 502 and the intermediate shell 503, a water inlet 504 and a water outlet 505 of the circulation channels are arranged on the front end surface of the intermediate shell 503, the water inlet 504 and the water outlet 505 are communicated with a low-temperature water distributor through water pipes, and then low-temperature cooling water in the low-temperature water pump 4 is distributed to the engine oil cooler 1 and the left intercooler 16 through the low-temperature water distributor 3.

In the above scheme, the existing exhaust gas turbocharging technology is adopted. The left and right sides are respectively provided with a set of independent supercharging and intercooling systems. When the supercharged engine works, exhaust gas from an exhaust pipe of the engine enters the turbine, and heat energy in the pressure of the exhaust gas rotates the turbine and a compressor coaxial with the turbine. The compressor draws in and compresses air, which then passes through a duct into an engine intake, and cooled and expanded exhaust gases exiting the turbine are directed by the turbine housing to an engine exhaust system and into the atmosphere. After the air is compressed, the air density of the air filled into the cylinder is improved, more fuel can be fully combusted under the good cooperation of an oil supply system, the power is improved, and the economical efficiency is improved.

As a preferred embodiment, the high power V12 cylinder diesel engine has a stroke to bore ratio of 1.1-1.3. In this scheme, select for use less stroke and cylinder diameter ratio, can reduce the height, width and the weight of diesel engine, the rotational speed of diesel engine can increase, has improved the power of diesel engine.

As a preferred embodiment, the ratio of the center distance between adjacent cylinders to the cylinder diameter of the high-power V-shaped 12-cylinder diesel engine is 1.3-1.45. In the scheme, the ratio of the center distance of the cylinders to the diameter of the cylinders is 1.25-1.4, the length of the diesel engine is more compact, the strengthening degree of the diesel engine is higher, and the rigidity of the crankshaft and the engine body is stronger. As the length of the crankshaft is shortened, the torsional rigidity is enhanced, the self-vibration circular frequency of the shafting is improved, and the torsional vibration performance is improved.

In summary, the high-power V-shaped 12-cylinder diesel engine of this embodiment, through setting up V-shaped

cylinder block

100, 12 monomer cylinder heads 200, the diesel oil feed system realizes two side oil supply, two sets of supercharging intercoolers of air intake system matched with, compressed air is through cooling, make its density further improve, be favorable to improving the power of engine, improve the performance, cooling system adopts high-temperature water separately cooling, high-temperature and low-temperature part classification cooling like this, can reduce air intake temperature and engine oil temperature, simultaneously reduce heat energy loss, the engine saves more oil, satisfy high-power, the requirement of big moment of torsion of high-power high-speed diesel engine, the organism is compacter, and intensity is big.

The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A high power V-12 cylinder diesel engine comprising:

a V-shaped cylinder block, wherein 12 two rows of cylinder holes which are arranged in a V shape are arranged on the V-shaped cylinder block, an included angle between the two rows of cylinder holes is 90 degrees, and sleeves corresponding to the number of the cylinder holes are respectively cast on the V-shaped cylinder block outside the two rows of cylinder holes;

12 single cylinder heads which are respectively and correspondingly arranged at the cylinder opening part of the V-shaped cylinder body;

the diesel oil supply system comprises a diesel oil tank, an oil supply pipeline and 12 electric control unit pumps, wherein the 12 electric control unit pumps are respectively and correspondingly arranged in the sleeve, the 12 electric control unit pumps are respectively used for controlling the injection of diesel oil to each cylinder, the diesel oil tank is communicated with the oil supply pipeline, the oil supply pipeline comprises a left oil pipe and a right oil pipe, and the left oil pipe and the right oil pipe are respectively and correspondingly connected through a vertical high-pressure oil pipe and the 12 electric control unit pumps;

an air intake system for supplying fresh air to the high power V-12 cylinder diesel engine; the air inlet system comprises a left side air inlet pipe, a right side air inlet pipe, a left side supercharger, a right side supercharger, a left side intercooler and a right side intercooler, wherein the left side intercooler and the right side intercooler are respectively arranged on two sides above the rear end of the V-shaped cylinder block, the left side supercharger and the right side supercharger are correspondingly arranged above the left side intercooler and the right side intercooler and are respectively protruded out of the top of the V-shaped cylinder block, the left side supercharger is connected with a left side air filter, the right side supercharger is connected with a right side air filter, and the left side air inlet pipe and the right side air inlet pipe are respectively communicated with the left side intercooler and the right side intercooler and then are arranged at the upper end positions of two sides of the V-shaped cylinder block;

the lubricating system comprises an oil pan, a pre-supply oil pump, an oil filter and an oil cooler, wherein the oil pan is arranged at the bottom of the V-shaped cylinder block, the pre-supply oil pump is arranged at the front side of the oil pan, the oil pump is arranged at the left lower position of the front end of the V-shaped cylinder block, and the oil filter and the oil cooler are both arranged at the left upper position of the front end of the V-shaped cylinder block; and

a cooling system including a high-temperature water circulation circuit including a rear-row radiator and a low-temperature water pump, the low-temperature water circulation circuit being used to cool the engine oil cooler, the high-temperature water circulation circuit including a front-row radiator and a high-temperature water pump, the high-temperature water circulation circuit being used to cool the V-block and the 12 single cylinder heads; the low-temperature water pump is arranged at a position, close to the upper part of the oil pump, of the front end of the V-shaped cylinder body, the high-temperature water pump is arranged at a position, close to the upper part of the diesel oil distributor, of the front end of the V-shaped cylinder body, the diesel oil distributor is fixed at the front end of the V-shaped cylinder body, diesel oil in the diesel oil tank is respectively communicated with the left side oil pipe and the right side oil pipe through the diesel oil distributor, diesel oil filters are respectively connected into the left side oil pipe and the right side oil pipe, and the diesel oil filters on the left side and the right side are respectively arranged on two sides of the V-shaped cylinder body; the low-temperature water pump, the high-temperature water pump, the oil pump and the diesel oil distributor surround the periphery of a crank pulley, the crank pulley drives the low-temperature water pump and the high-temperature water pump respectively, cooling liquid flowing through the V-shaped cylinder block and the 12 single cylinder heads enters the front-row radiator through a water outlet main pipe, three parallel thermostats are connected between the water outlet main pipe and the front-row radiator, the thermostats are arranged at the right upper position of the front end of the V-shaped cylinder block, the thermostats are communicated with the front-row radiator through radiator water pipes, and the radiator water pipes are arranged at the top of the V-shaped cylinder block.

2. The high-power V-shaped 12-cylinder diesel engine according to claim 1, wherein pistons with W combustion chambers are arranged in two rows of cylinder bores of the V-shaped cylinder block, an internal cooling oil passage is arranged in the pistons, and four ring grooves are arranged on the circumferential wall of the pistons.

3. The high-power V-type 12-cylinder diesel engine according to claim 1, wherein the low-temperature water circulation circuit includes a low-temperature water distributor fixed at a position where a front end of the V-shaped cylinder block is close to above the crank pulley, the low-temperature cooling water in the low-temperature water pump being distributed to the engine oil cooler and the left-side intercooler and the right-side intercooler via the low-temperature water distributor.

4. The high-power V-type 12-cylinder diesel engine according to claim 3, wherein the left intercooler and the right intercooler are square shells, an air circulation cavity is formed in the square shells around the air circulation cavity, a cooling liquid flow passage is formed in the square shells, an additional shell is arranged on the front sides of the square shells, an intermediate shell is arranged between the left intercooler and the right intercooler, two sides of the intermediate shell are respectively connected with inner side end surfaces of the additional shells of the left intercooler and the right intercooler, a circulation channel communicated with cooling liquid flow passages in the left intercooler and the right intercooler is formed in the additional shells and the intermediate shell, a water inlet and a water outlet of the circulation channel are formed in the front end surfaces of the intermediate shells, and the water inlet and the water outlet are communicated with the low-temperature water distributor through water pipes.

5. The high power V-12 cylinder diesel engine of claim 1, wherein said diesel supply system further comprises an oil pump and a diesel filter, said oil pump being interposed between said diesel tank and said diesel filter, said diesel filter being in communication with said left side oil pipe and said right side oil pipe, respectively, said oil pump being fixed in a lower right position at a front end of said V-block, said diesel filter being fixed in a right side of said V-block.

6. The high power V-12 cylinder diesel engine of claim 1, wherein the high power V-12 cylinder diesel engine has a stroke to bore ratio of 1.1-1.3.

7. The high power V-12 cylinder diesel engine of claim 1, wherein the ratio of adjacent cylinder center to cylinder diameter of the high power V-12 cylinder diesel engine is 1.3-1.45.