Cylinder block of a two-cylinder engine

Abstract

The utility model discloses a cylinder block of a two-cylinder engine, comprising a cylinder body of a gantry-type structure, wherein the cylinder body is provided with two cylinder holes, wherein the axis of the cylinder holes and the axis of the crankshaft hole are not in the same plane, wherein a closed water jacket assembly is provided on the top of the cylinder body, wherein a plurality of water jackets in the closed water jacket assembly are arranged along the outer peripheral wall of the cylinder hole, wherein an inter-cylinder water hole connected with the water jacket is provided between the two cylinder holes, wherein the inter-cylinder water hole forms a V-shaped distribution with adjacent water jackets; wherein the cylinder body is provided with a balancing shaft mounting hole for mounting the balancing shaft; wherein the cylinder body is provided with a main oil circuit, a main oil supply oil circuit, and an auxiliary oil supply oil circuit, wherein the gantry-type cylinder body is adopted, and wherein the closed water jacket assembly and the balancing shaft mounting hole are provided on the top of the cylinder body, thereby greatly improving the structural strength of the top surface of the cylinder body, reducing the deformation of the cylinder hole, and significantly improving the NVH performance of the engine after assembling the balancing shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of engine mechanical manufacturing, in particular to a cylinder body of a two-cylinder engine. Background Art

[0002] In the field of passenger cars, in order to meet the power requirements of the entire vehicle, the engine is usually an inline three-cylinder or four-cylinder structure, and two-cylinder engines have not yet been used.

[0003] In the motorcycle field, due to space limitations, the engine is usually an upright single-cylinder, twin-cylinder or V-type two-cylinder structure. For the cylinder block of a two-cylinder engine, a cylinder liner and crankcase split structure is usually adopted.

[0004] The existing two-cylinder engine cylinder blocks on the market usually have the following problems: due to the split structure, the cylinder block is heavy, affecting the total weight of the engine; the cylinder bore deformation of the cylinder block is relatively large, resulting in large piston leakage and oil consumption; and the cylinder block is not equipped with a balance shaft structure, resulting in poor NVH performance; Utility Model Content

[0005] In view of the above technical problems existing in the existing cylinder blocks, the purpose of the utility model is to provide a cylinder block for a two-cylinder engine, which adopts a gantry-type cylinder block, and sets a closed water jacket assembly and a balance shaft mounting hole on the top of the cylinder block, thereby greatly improving the structural strength of the top surface of the cylinder block, reducing the deformation of the cylinder hole, and significantly improving the NVH performance of the engine after assembling the balance shaft;

[0006] In order to achieve the above-mentioned object, the cylinder block of a two-cylinder engine provided by the utility model comprises a cylinder body of a gantry structure, wherein the cylinder body is provided with two cylinder holes, wherein the axis of the cylinder hole and the axis of the crankshaft hole are not in the same plane, wherein a closed water jacket assembly is provided on the top of the cylinder body, wherein a plurality of water jackets in the closed water jacket assembly are arranged along the outer peripheral wall of the cylinder hole, wherein an inter-cylinder water hole communicating with the water jacket is provided between the two cylinder holes, wherein the inter-cylinder water hole forms a V-shaped distribution with adjacent water jackets;

[0007] The cylinder body is provided with a balancing shaft mounting hole for mounting the balancing shaft;

[0008] The cylinder body is provided with a main oil circuit, a main oil supply circuit, and an auxiliary oil supply circuit.

[0009] The main oil supply circuit includes a feedback oil circuit and a cylinder oil supply circuit. The two ends of the feedback oil circuit are respectively connected to the oil pump and the main oil circuit. The input end of the cylinder oil supply circuit is the oil inlet of the cylinder, and the output end is connected to the main oil circuit through the oil filter and cooling module.

[0010] The auxiliary oil supply circuit includes a control valve oil circuit and a piston cooling nozzle oil circuit. The control valve oil circuit is provided with a control valve and is respectively connected to the main oil circuit and the piston cooling nozzle oil circuit. The piston cooling nozzle oil circuit is connected to a plurality of piston cooling nozzles. The control valve can control the opening and closing of the engine oil flowing from the control valve oil circuit to the piston cooling nozzle oil circuit.

[0011] Furthermore, the cylinder body as a whole is composed of a front-end timing cover mounting surface, a rear-end generator matching surface, an intake side surface, an exhaust side surface, a top cylinder head mounting surface, and a bottom oil pan mounting surface.

[0012] Furthermore, one side of the front timing cover mounting surface is provided with a first balance shaft mounting hole, a tensioner mounting surface, a first oil hole, a second oil hole, a third oil hole, a piston cooling nozzle oil circuit, and a transverse oil circuit;

[0013] The first balancing shaft mounting hole is used to mount the balancing shaft front bearing, and the tensioner mounting surface is used to provide mounting for the tensioner;

[0014] The first oil hole is the oil outlet hole of the feedback oil circuit, and the first oil hole is connected to the oil pump, and is used to connect the feedback oil circuit to the oil pump; the second oil hole is the oil inlet hole of the cylinder oil supply circuit;

[0015] The third oil hole is the oil inlet hole of the control valve oil circuit. The third oil hole is connected with the main oil circuit through the transverse oil circuit. The piston cooling nozzle oil circuit is respectively connected with the control valve oil circuit and the piston cooling nozzle.

[0016] Furthermore, the rear end generator mating surface is provided with a plurality of mounting holes, a water inlet hole, a main oil circuit, a second balance shaft mounting hole and a crankshaft rear oil seal seat mounting surface;

[0017] The plurality of mounting holes are used to fix the generator; the water inlet hole is the water inlet of the closed water jacket assembly;

[0018] The main oil circuit is the main oil circuit on the air intake side of the cylinder body. The oil treated by the oil filter and cooling module enters the main oil circuit. An oil hole is provided in the crankshaft hole to communicate with the main oil circuit.

[0019] The second balance shaft mounting hole is used to provide mounting support for the balance shaft rear bearing; the crankshaft rear oil seal seat mounting surface is used to provide mounting support for the crankshaft rear oil seal seat assembly.

[0020] Furthermore, the intake side is provided with a plurality of first suspension bracket mounting holes, the crankshaft position sensor mounting hole, the first oil pressure sensor mounting hole, a water outlet, a knock sensor mounting hole, and an oil filter and cooling module mounting surface;

[0021] The plurality of first suspension bracket mounting holes provide mounting support for the engine suspension bracket;

[0022] The crankshaft position sensor mounting hole is used to mount the crankshaft position sensor;

[0023] The first oil pressure sensor mounting hole is located in the main oil circuit and is used for mounting the oil pressure sensor;

[0024] The water outlet is located at the upper part of the air inlet side, on which a thermostat assembly is installed, and is communicated with the closed water jacket assembly, and is the water outlet of the closed water jacket assembly;

[0025] The knock sensor mounting hole is located at the upper part of the intake side and between the two cylinder holes, and is used to mount the knock sensor;

[0026] The oil filter and cooling module installation surface is located on the right side of the air intake side, and is used to install the oil filter and cooling module. The oil enters the cylinder oil supply oil circuit through the second oil hole, and is filtered and cooled by the oil filter and cooling module. After filtering and cooling, the oil enters the main oil circuit and the third oil hole.

[0027] Further, the exhaust side is provided with a plurality of second suspension bracket installations, a second oil pressure sensor installation hole, a supercharger oil inlet hole, a supercharger oil return hole, a supercharger bracket installation hole, a piston cooling nozzle control valve installation hole, and an oil return channel;

[0028] The plurality of second suspension bracket mounting holes provide mounting support for the engine suspension bracket;

[0029] The second oil pressure sensor mounting hole is located in the piston cooling nozzle oil path and is used to mount the oil pressure sensor;

[0030] The supercharger bracket mounting hole is located in the middle of the exhaust side and is used to install the supercharger bracket;

[0031] The supercharger oil inlet hole is connected to the transverse oil circuit at the front end of the cylinder body, and is connected to the supercharger input end through an external pipe to provide oil for the supercharger. The supercharger oil return hole is located in the middle of the exhaust side, is connected to the oil return channel, and is connected to the supercharger output end through an external pipe to return the oil in the supercharger to the oil pan.

[0032] The piston cooling nozzle control valve mounting hole is located between the control valve oil circuit and the piston cooling nozzle oil circuit, and can control the opening and closing of the piston cooling nozzle oil circuit;

[0033] The oil return channel is located at the right part of the exhaust side and is used to return the engine oil on the cylinder head to the oil pan.

[0034] Furthermore, the top cylinder head mounting surface is provided with a plurality of positioning pin holes, a plurality of cylinder head bolt holes, a closed water jacket assembly, a cylinder head oil return hole, an oil-gas separator oil return channel, an oil hole, and two curved air intake channels;

[0035] The plurality of positioning pin holes are used to install positioning pins to ensure the position accuracy of cylinder head assembly, and the plurality of cylinder head bolt holes are distributed around the cylinder hole and are used to connect the cylinder head;

[0036] The cylinder head oil return hole is connected to the oil return channel on the exhaust side, and the cylinder head oil return hole is the oil inlet hole of the oil return channel, and the engine oil in the cylinder head flows into the oil return channel from the cylinder head oil return hole;

[0037] The oil return channel of the oil-gas separator is used to communicate with the outlet of the oil-gas separator;

[0038] The oil hole is connected to the main oil circuit, and the oil in the main oil circuit flows out through the oil hole to supply oil to the cylinder head;

[0039] The two curved air intake channels are located on the top cylinder head mounting surface close to the air intake side, and the output ends of the two curved air intake channels are connected to the inlet of the oil-gas separator, so that the oil-gas mixture in the crankcase can be introduced into the oil-gas separator for separation;

[0040] Furthermore, the bottom oil pan mounting surface is provided with a plurality of oil pan mounting holes, a first oil return port, two air intake ports, a plurality of piston cooling nozzle mounting holes, and a second oil return port;

[0041] The plurality of oil pan mounting holes are used to fix the oil pan;

[0042] The first oil return port is communicated with the oil return passage of the oil-gas separator and is the oil outlet of the oil return passage of the oil-gas separator. The oil in the oil return passage of the oil-gas separator flows out through the first oil return port.

[0043] The second oil return port is communicated with the oil return channel on the exhaust side, and is the oil outlet of the oil return channel. The oil in the oil return channel enters the oil pan through the oil return port.

[0044] The two air intake ports are respectively connected to the input ends of the two curved air intake channels on the top cylinder head mounting surface, and the oil and gas in the crankcase are introduced into the curved air intake channels through the two air intake ports;

[0045] The plurality of piston cooling nozzle mounting holes are in communication with the piston cooling nozzle oil circuit and are used for mounting the piston cooling nozzles.

[0046] Further, the closed water jacket assembly includes a water jacket, an external water jacket, and an inter-cylinder water hole. The water jacket is a closed water jacket, and is arranged along the outer peripheral wall of the cylinder hole with a peripheral contour that is roughly annular. The annular water jacket is a circulating cooling water channel arranged around the outer peripheral wall of the entire cylinder hole. The external water jacket is arranged along the outer peripheral wall of the annular water jacket, and the external water jacket is connected to the water jacket through the water hole.

[0047] The inter-cylinder water hole is arranged in the nose bridge area between the two cylinder holes, the inter-cylinder water hole is communicated with the water jacket, and forms a V-shaped distribution with the adjacent water jacket.

[0048] Furthermore, a water jacket spacer column mounting hole is provided in the water jacket for mounting the water jacket spacer column.

[0049] The cylinder block of the two-cylinder engine provided by the utility model has the following beneficial effects:

[0050] (1) The cylinder body adopts a gantry structure, which can improve the structural strength of the cylinder body and reduce the number of parts;

[0051] (2) Closed water jacket improves the structural strength of the cylinder block top surface and reduces cylinder bore deformation;

[0052] (3) There is a "V"-shaped water hole feature between the cylinders, which reduces the temperature of the nose bridge area between the cylinders;

[0053] (4) The crankshaft hole is offset toward the main thrust side, which can reduce the friction when the piston does work;

[0054] (5) With a balance shaft mounting hole, the NVH performance of the engine can be significantly improved after the balance shaft is installed;

[0055] (6) The main and auxiliary oil circuits are structured such that one circuit supplies oil to the main bearing hole and the other circuit supplies oil to the piston cold nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The present invention is further described below in conjunction with the accompanying drawings and specific implementations.

[0057] Figure 1 A schematic structural diagram of a cylinder block of a two-cylinder engine provided by the utility model from a first perspective;

[0058] Figure 2 A second perspective structural schematic diagram of a cylinder block of a two-cylinder engine provided by the utility model;

[0059] Figure 3 A schematic diagram of the structure of the front end timing cover mounting surface of the cylinder block of a two-cylinder engine provided by the utility model;

[0060] Figure 4 A schematic diagram of the structure of the generator matching surface at the middle and rear end of the cylinder block of a two-cylinder engine provided by the utility model;

[0061] Figure 5 A schematic structural diagram of the air intake side of a cylinder block of a two-cylinder engine provided by the utility model;

[0062] Figure 6 A schematic diagram of the structure of the exhaust side of the cylinder block of a two-cylinder engine provided by the utility model;

[0063] Figure 7 A schematic diagram of the structure of the top cylinder head mounting surface in the cylinder block of a two-cylinder engine provided by the utility model;

[0064] Figure 8 The utility model is a schematic structural diagram of the oil pan mounting surface at the bottom end of the cylinder block of a two-cylinder engine.

[0065] Illustration Description:

[0066] Cylinder body 100

[0067] Cylinder bore 101, crankshaft bore 102,

[0068] Front end timing cover mounting surface 110, first balance shaft mounting hole 111, tensioner mounting surface 112, first oil hole 113, second oil hole 114, third oil hole 115, piston cooling nozzle oil circuit 116, transverse oil circuit 117, rear end generator matching surface 120, water inlet hole 121, main oil circuit 122, second balance shaft mounting hole 123, crankshaft rear oil seal seat mounting surface 124, intake side 130, first suspension bracket mounting hole 131, crankshaft position sensor mounting hole 132, first oil pressure sensor mounting hole 133, water outlet 134, knock sensor mounting hole 135, oil filter and cooling module mounting surface 136, first engraved surface 138, exhaust side 140, second suspension bracket mounting hole 141, second oil Pressure sensor mounting hole 142, supercharger oil inlet hole 143, supercharger oil return hole 144, supercharger bracket mounting hole 145, piston cooling nozzle control valve mounting hole 146, oil return channel 147, second engraved surface 148, top cylinder head mounting surface 150, locating pin hole 151, cylinder head bolt hole 152, cylinder head oil return hole 153, oil-gas separator oil return channel 154, oil hole 155, curved air intake channel 156, bottom oil pan mounting surface 160, oil pan mounting hole 161, first oil return port 162, air intake port 163, piston cooling nozzle mounting hole 164, second oil return port 165, closed water jacket assembly 170, water jacket 171, external water jacket 172, inter-cylinder water hole 173, water jacket partition column mounting hole 174. DETAILED DESCRIPTION

[0069] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0070] See also Figure 1-Figure 2 , which is a schematic structural diagram of the cylinder body of the two-cylinder engine provided by the utility model.

[0071] It can be seen from the figure that the cylinder block of the two-cylinder engine provided by the utility model includes a component of a cylinder body 100.

[0072] The cylinder body 100 adopts a gantry structure, which can improve the structural strength of the cylinder body and reduce the number of parts;

[0073] The cylinder body 100 is provided with two cylinder holes 101, and the axis of the cylinder hole 101 and the axis of the crankshaft hole 102 are not in the same plane;

[0074] A closed water jacket assembly 170 is provided on the top of the cylinder body 100. A water jacket 171 in the closed water jacket assembly 170 is arranged along the outer peripheral wall of the cylinder hole 101. An inter-cylinder water hole 173 communicating with the water jacket 171 is provided between two cylinder holes 101. The inter-cylinder water hole 173 forms a V-shaped distribution with adjacent water jackets 171.

[0075] The cylinder body 100 is provided with a balancing shaft mounting hole for mounting the balancing shaft;

[0076] The cylinder body 100 is provided with a main oil circuit, a main oil supply circuit, and an auxiliary oil supply circuit.

[0077] The main oil supply circuit includes a feedback oil circuit and a cylinder oil supply circuit. The two ends of the feedback oil circuit are respectively connected to the oil pump and the main oil circuit. The input end of the cylinder oil supply circuit is the oil inlet of the cylinder, and the output end is connected to the main oil circuit through the oil filter and cooling module.

[0078] The auxiliary oil supply circuit includes a control valve oil circuit and a piston cooling nozzle oil circuit 116. The control valve oil circuit is provided with a control valve and is respectively connected to the main oil circuit and the piston cooling nozzle oil circuit 116. The piston cooling nozzle oil circuit 116 is connected to a plurality of piston cooling nozzles. The control valve can control the opening and closing of the engine oil flowing from the control valve oil circuit to the piston cooling nozzle oil circuit 116.

[0079] Specifically, Figure 1 and Figure 2 The cylinder body 100 as a whole is composed of six surfaces: a front timing cover mounting surface 110, a rear generator matching surface 120, an intake side surface 130, an exhaust side surface 140, a top cylinder head mounting surface 150, and a bottom oil pan mounting surface 160.

[0080] like Figure 3 From the perspective of the front timing cover mounting surface 110, the center axis of the crankshaft hole 102 and the center axis of the cylinder hole 101 are not in the same plane. In this example, the crankshaft hole 102 is offset toward the intake side 130, and the horizontal distance between the center axis of the crankshaft hole 102 and the center axis of the cylinder hole 101 is preferably 8 mm. Such a structure can help reduce the friction when the piston does work.

[0081] like Figure 3The front end timing cover mounting surface 110 is used to mount the timing cover. One side of the front end timing cover mounting surface 110 is provided with a first balance shaft mounting hole 111, a tensioner mounting surface 112, a first oil hole 113, a second oil hole 114, a third oil hole 115, a piston cooling nozzle oil passage 116, and a transverse oil passage 117;

[0082] The first balancing shaft mounting hole 111 is used to mount the front bearing of the balancing shaft, and the balancing shaft can improve the NVH performance of the engine. The tensioner mounting surface 112 is used to provide a mounting for the tensioner for tensioning the timing system chain;

[0083] The first oil hole 113 is the oil outlet hole of the feedback oil circuit. The first oil hole 113 is connected to the oil pump and is used to lead the feedback oil circuit to the oil pump. When the oil pressure in the main oil circuit is too high, the main oil circuit pressure flows through the feedback oil circuit and is fed back to the oil pump through the first oil hole 113. The oil pump pressure relief valve opens to reduce the main oil circuit pressure.

[0084] The second oil hole 114 is the oil inlet hole of the cylinder oil supply circuit. The oil pumped out by the oil pump enters the second oil hole 114 through the oil channel on the timing cover, and then passes through the oil filter and cooling module to the main oil circuit 122 to provide lubrication and cooling for the moving pair.

[0085] The third oil hole 115 is the oil inlet hole of the control valve oil circuit. The third oil hole 115 is connected to the main oil circuit 122 through the transverse oil circuit 117. The piston cooling nozzle oil circuit 116 is respectively connected to the control valve oil circuit and the piston cooling nozzle.

[0086] In actual application, the oil passing through the oil filter and cooling module enters the third oil hole 115 through the transverse oil circuit 117, and then flows into the control valve oil circuit. When the engine is just started, the engine temperature is low and the piston does not need to be cooled. The control valve installed in the control valve oil circuit closes the connection between the third oil hole 115 and the piston cooling nozzle oil circuit 116, so that the oil in the third oil hole 115 cannot flow into the piston cooling nozzle oil circuit 116. When the engine temperature exceeds the set value, the control valve installed in the control valve oil circuit opens the connection between the third oil hole 115 and the piston cooling nozzle oil circuit 116, so that the oil in the third oil hole 115 flows into the piston cooling nozzle oil circuit 116, and then enters the piston cooling nozzle, spraying oil to the bottom of the piston to provide cooling and lubrication for the piston. This can improve the warm-up speed, reduce emissions, and reduce fuel consumption.

[0087] like Figure 4 The rear end generator mating surface 120 is used for mating and connecting with the generator. The rear end generator mating surface 120 is provided with a plurality of mounting holes, a water inlet hole 121, a main oil passage 122, a second balance shaft mounting hole 123 and a crankshaft rear oil seal seat mounting surface 124;

[0088] The above-mentioned several mounting holes are used to fix the generator;

[0089] The water inlet hole 121 is the water inlet of the closed water jacket assembly 170, which is connected to the water outlet of the water pump. Cooling water enters the closed water jacket assembly 170 through the water inlet hole 121 to provide cooling for the cylinder block and the cylinder head.

[0090] The main oil circuit 122 is the main oil circuit on the intake side of the cylinder body 100. The oil treated by the oil filter and cooling module enters the main oil circuit 122. The crankshaft hole 102 is provided with an oil hole connected to the main oil circuit 122, thereby providing lubrication for the crankshaft main journal and connecting rod journal.

[0091] The second balancing shaft mounting hole 123 is used to provide mounting support for the rear bearing of the balancing shaft;

[0092] The crankshaft rear oil seal seat mounting surface 124 is used to provide mounting support for the crankshaft rear oil seal seat assembly for sealing the rear end of the cylinder block.

[0093] like Figure 5 The intake side surface 130 is provided with a plurality of first suspension bracket mounting holes 131, a crankshaft position sensor mounting hole 132, a first oil pressure sensor mounting hole 133, a water outlet 134, a knock sensor mounting hole 135, and an oil filter and cooling module mounting surface 136.

[0094] The plurality of first suspension bracket mounting holes 131 provide mounting support for the engine suspension bracket;

[0095] The crankshaft position sensor mounting hole 132 is used to mount the crankshaft position sensor, through which the crankshaft position sensor provides a crankshaft position signal to the ECU;

[0096] The first oil pressure sensor mounting hole 133 is located on the main oil circuit 122 and is used to mount an oil pressure sensor, which provides an oil pressure signal in the main oil circuit 122 on the intake side 130 of the cylinder block to the ECU.

[0097] The water outlet 134 is located at the upper part of the air intake side 130 , on which a thermostat assembly is installed, and is communicated with the closed water jacket assembly 170 , serving as the water outlet of the closed water jacket assembly 170 , through which the coolant is discharged from the cylinder block.

[0098] The knock sensor mounting hole 135 is located at the upper portion of the intake side surface 130 and between the two cylinder holes 101 and is used for mounting a knock sensor, which provides an engine knock signal to the ECU.

[0099] The oil filter and cooling module installation surface 136 is located at the right part of the air intake side surface 130, and is used to install the oil filter and cooling module. The oil enters the cylinder oil supply oil circuit through the second oil hole 114 and is filtered and cooled by the oil filter and cooling module. After filtering and cooling, the oil enters the main oil circuit 122 and the third oil hole 115.

[0100] like Figure 6 , the exhaust side surface 140 is provided with a plurality of second suspension bracket mounting holes 141, a second oil pressure sensor mounting hole 142, a supercharger oil inlet hole 143, a supercharger oil return hole 144, a supercharger bracket mounting hole 145, a piston cooling nozzle control valve mounting hole 146, and an oil return channel 147;

[0101] The plurality of second suspension bracket mounting holes 141 provide mounting support for the engine suspension bracket;

[0102] The second oil pressure sensor mounting hole 142 is located on the piston cooling nozzle oil circuit 116 and is used for mounting an oil pressure sensor, which provides the piston cooling nozzle oil circuit 116 oil pressure signal to the ECU.

[0103] The supercharger bracket mounting hole 145 is located in the middle of the exhaust side surface 140 and is used to mount the supercharger bracket to provide support for the supercharger.

[0104] The supercharger oil inlet hole 143 is connected to the transverse oil path 117 at the front end of the cylinder body, and is connected to the supercharger input end through an external pipeline to provide oil to the supercharger for lubrication and cooling of the supercharger. The supercharger oil return hole 144 is located in the middle of the exhaust side 140, which is connected to the oil return channel 147 and is connected to the supercharger output end through an external pipeline to return the oil in the supercharger to the oil pan.

[0105] In actual application, the oil in the supercharger oil inlet hole 143 enters the supercharger through the external pipeline, provides cooling and lubrication for the supercharger, and then returns to the supercharger oil return hole 144 through the external pipeline, and then returns to the oil pan through the oil return channel 147.

[0106] The piston cooling nozzle control valve mounting hole 146 is located between the control valve oil circuit and the piston cooling nozzle oil circuit 116, and can control the opening and closing of the piston cooling nozzle oil circuit 116;

[0107] The oil return passage 147 is located at the right portion of the exhaust side 140 and is used to return the engine oil on the cylinder head to the oil pan.

[0108] like Figure 7The top cylinder head mounting surface 150 is used to mount the cylinder head. The top cylinder head mounting surface 150 is provided with a plurality of positioning pin holes 151, a plurality of cylinder head bolt holes 152, a closed water jacket assembly 170, a cylinder head oil return hole 153, an oil-gas separator oil return passage 154, an oil hole 155, and two curved air intake passages 156;

[0109] The plurality of positioning pin holes 151 are used to install positioning pins to ensure the position accuracy of cylinder head assembly, and the plurality of cylinder head bolt holes 152 are distributed around the cylinder hole 101 and are used to connect the cylinder head;

[0110] The cylinder head oil return hole 153 is connected to the oil return channel 147 on the exhaust side 140. The cylinder head oil return hole 153 is the oil inlet hole of the oil return channel 147. The engine oil in the cylinder head flows into the oil return channel 147 from the cylinder head oil return hole 153.

[0111] The oil-gas separator oil return passage 154 is used to communicate with the outlet of the oil-gas separator, and the oil separated by the oil-gas separator returns to the oil pan from the oil-gas separator oil return passage 154;

[0112] The oil hole 155 is connected to the main oil circuit 122, and the oil in the main oil circuit 122 flows out through this hole to supply oil to the cylinder head.

[0113] The two curved air intake channels 156 are located at the top cylinder head mounting surface 150 near the intake side surface 130. The output ends of the two curved air intake channels 156 are connected to the inlet of the oil-gas separator in the cylinder head, and the oil-gas mixture in the crankcase can be introduced into the oil-gas separator for separation.

[0114] like Figure 8 The bottom oil pan mounting surface 160 is used to mount the oil pan, and the bottom oil pan mounting surface 160 is provided with a plurality of oil pan mounting holes 161, a first oil return port 162, two air intake ports 163, a plurality of piston cooling nozzle mounting holes 164, and a second oil return port 165;

[0115] The above-mentioned plurality of oil pan mounting holes 161 are used to fix the oil pan;

[0116] The first oil return port 162 is in communication with the oil-gas separator oil return passage 154 , and is the oil outlet of the oil-gas separator oil return passage 154 . The oil in the oil-gas separator oil return passage 154 flows out through the first oil return port 162 .

[0117] The second oil return port 165 is communicated with the oil return channel 147 on the exhaust side 140 and is the oil outlet of the oil return channel 147. The oil in the oil return channel 147 enters the oil pan through the oil return port 165.

[0118] The two air intake ports 163 are respectively connected to the input ends of the two curved air intake channels 156 on the top cylinder head mounting surface 150 , and the oil and gas in the crankcase are introduced into the curved air intake channels 156 through the two air intake ports 163 .

[0119] A plurality of piston cooling nozzle mounting holes 164 are in communication with the piston cooling nozzle oil circuit 116 and are used for mounting piston cooling nozzles to provide cooling for the piston.

[0120] Furthermore, if Figure 7 The closed water jacket assembly 170 includes a water jacket 171, an external water jacket 172, and an inter-cylinder water hole 173. The water jacket 171 is a closed water jacket, and is arranged along the outer peripheral wall of the cylinder hole 101, and the peripheral contour is roughly annular. The annular water jacket 171 is a circulating cooling water channel arranged around the outer peripheral wall of the cylinder hole 101 as a whole. The external water jacket 172 is arranged along the outer peripheral wall of the annular water jacket 171, and the external water jacket 172 is connected to the water jacket 171 through the water hole.

[0121] The inter-cylinder water hole 173 is disposed in the nose bridge area between the two cylinder holes 101 , the inter-cylinder water hole is communicated with the water jacket 171 , and forms a V-shaped distribution with the adjacent water jacket 171 ;

[0122] This solution can increase the structural strength of the top of the cylinder hole by using a closed water jacket 171, reduce the deformation of the cylinder hole, and form a V-shaped feature by cooperating with the water jacket 171 between the cylinders, which can effectively reduce the temperature of the nose bridge area;

[0123] Furthermore, a water jacket spacer mounting hole 174 is provided in the water jacket 171 for mounting a water jacket spacer, which can play a role in distributing the flow of the coolant.

[0124] Furthermore, a first engraved surface 138 and a second engraved surface 148 are respectively provided on the intake side surface 130 and the exhaust side surface 140 , which are used to engrave cylinder body information and engine information respectively.

[0125] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A cylinder block of a two-cylinder engine, characterized in that: A cylinder body comprising a gantry-type structure, wherein the cylinder body is provided with two cylinder holes, wherein the axis of the cylinder hole is not in the same plane as the axis of the crankshaft hole, wherein a closed water jacket assembly is provided on the top of the cylinder body, wherein a plurality of water jackets in the closed water jacket assembly are arranged along the outer peripheral wall of the cylinder hole, wherein an inter-cylinder water hole communicating with the water jacket is provided between the two cylinder holes, wherein the inter-cylinder water hole forms a V-shaped distribution with adjacent water jackets; The cylinder body is provided with a balancing shaft mounting hole for mounting the balancing shaft; The cylinder body is provided with a main oil circuit, a main oil supply circuit, and an auxiliary oil supply circuit. The main oil supply circuit includes a feedback oil circuit and a cylinder oil supply circuit. The two ends of the feedback oil circuit are respectively connected to the oil pump and the main oil circuit. The input end of the cylinder oil supply circuit is the oil inlet of the cylinder, and the output end is connected to the main oil circuit through the oil filter and cooling module. The auxiliary oil supply circuit includes a control valve oil circuit and a piston cooling nozzle oil circuit. The control valve oil circuit is provided with a control valve and is respectively connected to the main oil circuit and the piston cooling nozzle oil circuit. The piston cooling nozzle oil circuit is connected to a plurality of piston cooling nozzles. The control valve can control the opening and closing of the engine oil flowing from the control valve oil circuit to the piston cooling nozzle oil circuit.

2. The cylinder block of a two-cylinder engine according to claim 1, characterized in that: The cylinder body as a whole is composed of a front timing cover mounting surface, a rear generator matching surface, an intake side surface, an exhaust side surface, a top cylinder head mounting surface, and a bottom oil pan mounting surface.

3. The cylinder block of a two-cylinder engine according to claim 2, characterized in that: One side of the front timing cover mounting surface is provided with a first balance shaft mounting hole, a tensioner mounting surface, a first oil hole, a second oil hole, a third oil hole, a piston cooling nozzle oil circuit, and a transverse oil circuit; The first balancing shaft mounting hole is used to mount the balancing shaft front bearing, and the tensioner mounting surface is used to provide mounting for the tensioner; The first oil hole is the oil outlet hole of the feedback oil circuit, and the first oil hole is connected to the oil pump, and is used to connect the feedback oil circuit to the oil pump; the second oil hole is the oil inlet hole of the cylinder oil supply circuit; The third oil hole is the oil inlet hole of the control valve oil circuit. The third oil hole is connected with the main oil circuit through the transverse oil circuit. The piston cooling nozzle oil circuit is respectively connected with the control valve oil circuit and the piston cooling nozzle.

4. The cylinder block of a two-cylinder engine according to claim 2, characterized in that: The rear end generator mating surface is provided with a plurality of mounting holes, a water inlet hole, a main oil circuit, a second balance shaft mounting hole and a crankshaft rear oil seal seat mounting surface; The plurality of mounting holes are used to fix the generator; the water inlet hole is the water inlet of the closed water jacket assembly; The main oil circuit is the main oil circuit on the air intake side of the cylinder body. The oil treated by the oil filter and cooling module enters the main oil circuit. An oil hole is provided in the crankshaft hole to communicate with the main oil circuit. The second balance shaft mounting hole is used to provide mounting support for the balance shaft rear bearing; the crankshaft rear oil seal seat mounting surface is used to provide mounting support for the crankshaft rear oil seal seat assembly.

5. The cylinder block of a two-cylinder engine according to claim 2, characterized in that: The intake side is provided with a plurality of first suspension bracket mounting holes, a crankshaft position sensor mounting hole, a first oil pressure sensor mounting hole, a water outlet, a knock sensor mounting hole, and an oil filter and cooling module mounting surface; The plurality of first suspension bracket mounting holes provide mounting support for the engine suspension bracket; The crankshaft position sensor mounting hole is used to mount the crankshaft position sensor; The first oil pressure sensor mounting hole is located in the main oil circuit and is used to mount the oil pressure sensor; the water outlet is located at the upper part of the air intake side, on which a thermostat assembly is mounted and connected to the closed water The jacket assembly is connected to the water outlet of the closed water jacket assembly; The knock sensor mounting hole is located at the upper part of the intake side and between the two cylinder holes, and is used to mount the knock sensor; The installation surface of the oil filter and cooling module is located on the right side of the air intake side and is used to install the oil filter and cooling module. The engine oil enters the cylinder oil supply circuit through the second oil hole and is filtered and cooled by the oil filter and cooling module. After filtering and cooling, it enters the main oil circuit and the third oil hole.

6. The cylinder block of a two-cylinder engine according to claim 2, characterized in that: The exhaust side is provided with a plurality of second suspension bracket mounting holes, a second oil pressure sensor mounting hole, a supercharger oil inlet hole, a supercharger oil return hole, a supercharger bracket mounting hole, a piston cooling nozzle control valve mounting hole, and an oil return channel; The plurality of second suspension bracket mounting holes provide mounting support for the engine suspension bracket; The second oil pressure sensor mounting hole is located in the piston cooling nozzle oil path and is used to mount the oil pressure sensor; The supercharger bracket mounting hole is located in the middle of the exhaust side and is used to install the supercharger bracket; The supercharger oil inlet hole is connected to the transverse oil circuit at the front end of the cylinder body, and is connected to the supercharger input end through an external pipe to provide oil for the supercharger. The supercharger oil return hole is located in the middle of the exhaust side, is connected to the oil return channel, and is connected to the supercharger output end through an external pipe to return the oil in the supercharger to the oil pan. The piston cooling nozzle control valve mounting hole is located between the control valve oil circuit and the piston cooling nozzle oil circuit, and can control the opening and closing of the piston cooling nozzle oil circuit; The oil return channel is located at the right part of the exhaust side and is used to return the engine oil on the cylinder head to the oil pan.

7. The cylinder block of a two-cylinder engine according to claim 2, characterized in that: The top cylinder head mounting surface is provided with a plurality of positioning pin holes, a plurality of cylinder head bolt holes, a closed water jacket assembly, a cylinder head oil return hole, an oil-gas separator oil return channel, an oil hole, and two curved air intake channels; The plurality of positioning pin holes are used to install positioning pins to ensure the position accuracy of cylinder head assembly, and the plurality of cylinder head bolt holes are arranged around the cylinder hole to connect the cylinder head; The cylinder head oil return hole is connected to the oil return channel on the exhaust side, and the cylinder head oil return hole is the oil inlet hole of the oil return channel, and the engine oil in the cylinder head flows into the oil return channel from the cylinder head oil return hole; The oil return channel of the oil-gas separator is used to communicate with the outlet of the oil-gas separator; The oil hole is connected to the main oil circuit, and the oil in the main oil circuit flows out through the oil hole to supply oil to the cylinder head; The two curved air intake channels are located on the top cylinder head mounting surface close to the intake side, and the output ends of the two curved air intake channels are connected to the inlet of the oil-gas separator, so that the oil-gas mixture in the crankcase can be introduced into the oil-gas separator for separation.

8. The cylinder block of a two-cylinder engine according to claim 2, characterized in that: The bottom oil pan mounting surface is provided with a plurality of oil pan mounting holes, a first oil return port, two air intake ports, a plurality of piston cooling nozzle mounting holes, and a second oil return port; The plurality of oil pan mounting holes are used to fix the oil pan; The first oil return port is communicated with the oil return passage of the oil-gas separator and is the oil outlet of the oil return passage of the oil-gas separator. The oil in the oil return passage of the oil-gas separator flows out through the first oil return port. The second oil return port is communicated with the oil return channel on the exhaust side, and is the oil outlet of the oil return channel. The oil in the oil return channel enters the oil pan through the oil return port. The two air intake ports are respectively connected to the input ends of the two curved air intake channels on the top cylinder head mounting surface, and the oil and gas in the crankcase are introduced into the curved air intake channels through the two air intake ports; The plurality of piston cooling nozzle mounting holes are in communication with the piston cooling nozzle oil circuit and are used for mounting the piston cooling nozzles.

9. The cylinder block of a two-cylinder engine according to claim 7, characterized in that: The closed water jacket assembly includes a water jacket, an external water jacket, and an inter-cylinder water hole. The water jacket is a closed water jacket, and is arranged along the outer peripheral wall of the cylinder hole with a peripheral contour roughly in an annular shape. The annular water jacket is a circulating cooling water channel arranged around the outer peripheral wall of the entire cylinder hole. The external water jacket is arranged along the outer peripheral wall of the annular water jacket, and the external water jacket is connected to the water jacket through the water hole. The inter-cylinder water hole is arranged in the nose bridge area between the two cylinder holes, the inter-cylinder water hole is communicated with the water jacket, and forms a V-shaped distribution with the adjacent water jacket.

10. The cylinder block of a two-cylinder engine according to claim 9, characterized in that: The water jacket is provided with a water jacket spacer column mounting hole for mounting the water jacket spacer column.

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