Range-extending type engine

Abstract

The invention provides an extended-range engine which comprises an engine body, the engine body comprises a cylinder body and a crank case, the cylinder body comprises a left air cylinder and a right air cylinder, a left piston and a right piston are arranged in the left air cylinder and the right air cylinder respectively, a crankshaft is arranged in the crank case, and the left piston and the right piston are arranged in the crank case. The left piston and the right piston are connected to the two ends of a crankshaft through a left connecting rod and a right connecting rod correspondingly. A generator rotor is arranged on the crankshaft, the generator rotor comprises a rotor winding, and the rotor winding is arranged on a crank of the crankshaft to form a first balancing weight; and a generator stator is adaptively arranged in the machine body. The power assembly has the advantages that the rotor winding is arranged on the crank of the crankshaft to form the first balancing weight, the weight and the size of the power assembly can be reduced, the space arrangement difficulty is optimized, the driving performance of the whole vehicle is improved, and meanwhile the cost of the power assembly can be reduced; layered arrangement of the windings maximizes the line length of magnetic induction lines cut by the rotor windings, and improves the working efficiency of the generator rotor in unit volume.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile engines, and in particular to a range-extended engine. Background Art

[0002] As environmental protection issues are taken seriously by countries around the world, Chinese regulations are leaning towards new energy vehicles, and new energy vehicles are gradually opening up the market. Some OEMs adopt pure electric drive solutions, which can solve problems such as difficult power compartment layout and poor driving performance, but will lead to reduced mileage and increased costs. Some OEMs use extended-range engines, but the currently commonly used extended-range new energy vehicles have some obvious disadvantages, such as: the coexistence of engines, generators, batteries, and electric motors, which is costly; the power compartment is complex, and the use of traditional fuel vehicle engines is large and difficult to arrange; the traditional fuel vehicle engine is heavy, which leads to an increase in the weight of the vehicle, damages driving performance, and increases energy consumption; the engine requires less power, which prompts the OEM to choose a three-cylinder engine, which makes it difficult to optimize the engine and vehicle suspension, and the vehicle comfort is poor, which is often criticized by the market; some OEMs use four-cylinder engines as extended-range engines, which can solve the problem of poor comfort to a certain extent, but the cost, space and driving performance problems cannot be solved. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present invention provides an extended-range engine, in which the rotor winding of the generator is arranged on the crank of the crankshaft to form a first counterweight block, and the engine and the generator are integrated.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] A range-extended engine comprises a body, wherein the body comprises a cylinder block and a crankcase, the cylinder block comprises a left cylinder and a right cylinder, a left piston and a right piston are respectively arranged in the left cylinder and the right cylinder, a crankshaft is arranged in the crankcase, the left piston and the right piston are respectively connected to the two ends of the crankshaft through a left connecting rod and a right connecting rod; a generator rotor is arranged on the crankshaft, the generator rotor comprises a rotor winding, and the rotor winding is arranged on the crank of the crankshaft to form a first counterweight block; a generator stator is adaptively arranged in the body, and the engine and the generator are integrated.

[0006] Furthermore, the crankshaft includes multiple cranks, at least one rotor winding and at least one second counterweight, and the rotor winding and the second counterweight are respectively arranged on each crank; or, the crankshaft includes multiple cranks, and a rotor winding is arranged on each crank, and the rotor winding can be flexibly arranged on the crankshaft.

[0007] Further, when the rotor winding and the second counterweight are respectively arranged on each crank, the projections of each rotor winding and the second counterweight on the cross section of the crankshaft are evenly distributed along a 360° circumference;

[0008] When a rotor winding is arranged on each crank, the projections of each rotor winding on the crankshaft cross section are evenly distributed along a 360° circle; or, the projections of one part of the rotor winding on the crankshaft cross section and the projections of another part of the rotor winding on the crankshaft cross section are symmetrically arranged relative to the axis of the crankshaft main shaft, so that the crankshaft still remains balanced.

[0009] Furthermore, the engine includes a two-cylinder engine, the left cylinder and the right cylinder are horizontally opposed, and the axes of the left cylinder and the right cylinder are not coaxial; the crankshaft includes four cranks and a first rotor winding A, a second rotor winding B, a third rotor winding C and a fourth rotor winding D, which are respectively arranged on the four cranks and distributed in sequence along the main axis extension direction of the crankshaft, thereby improving the comfort of the whole vehicle and reducing the volume of the engine.

[0010] Further, the projections of the first rotor winding A and the second rotor winding B on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft, and the projections of the third rotor winding C and the fourth rotor winding D on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft; or the projections of the first rotor winding A and the fourth rotor winding D on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft, and the projections of the second rotor winding B and the third rotor winding C on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft; or the projections of the first rotor winding A and the third rotor winding C on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft, and the projections of the second rotor winding B and the fourth rotor winding D on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft.

[0011] Furthermore, the projections of the first rotor winding A, the second rotor winding B, the third rotor winding C and the fourth rotor winding D on the cross section of the crankshaft are evenly distributed along a 360° circumference.

[0012] Furthermore, the rotor winding is in an arc shape surrounding the main axis of the crankshaft, and the center angle α of the arc is 90°-160°, preferably, the center angle α of the arc is 130°-160°; each rotor winding is provided with a plurality of iron cores along the radial direction of the crankshaft, and each iron core is provided with a sub-winding; preferably, the number of the iron cores is 4-6, the distance between adjacent iron cores is 8-15mm, and the radial thickness of the sub-winding is 40-60mm. The rotor winding is arranged in layers to improve the unit volume working efficiency of the generator rotor.

[0013] Furthermore, the machine body also includes a main bearing seat, and a generator collector ring is arranged in the main bearing seat.

[0014] Furthermore, the left cylinder and the right cylinder are respectively provided with a left cylinder head and a right cylinder head, a left cylinder head cover, a right cylinder head cover, a left DVVT timing mechanism and a right DVVT timing mechanism; the left cylinder head and the right cylinder head are both provided with a cylinder water inlet and a cylinder water outlet, and the right cylinder head is provided with a water pump, the water outlet and the water inlet of the water pump body are respectively directly connected to the cylinder water inlet and the cylinder water outlet of the right cylinder head, and the water outlet and the water inlet of the water pump housing are respectively connected to the cylinder water inlet and the cylinder water outlet of the left cylinder head through a cooling pipeline; the front part of the left cylinder head cover is connected to the camshaft support seat of the left DVVT timing mechanism and the right DVVT timing mechanism, and the rear part of the right cylinder head cover is provided with a power take-off port; preferably, the oil channel, water channel and moving part cavity of the left cylinder head and the right cylinder head are the same, so that the cooling system is integrated with the machine body.

[0015] Furthermore, the engine body is integrated with a lubrication system, an oil cooler and an oil filter are arranged on the lower right side of the engine body, an oil dipstick and an oil-gas separator are arranged on the upper left side of the engine body, and an oil pump is arranged on the front end cover of the crankshaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The engine and generator are integrated, and the rotor winding is set on the crank of the crankshaft to form the first counterweight block. This can reduce the weight and volume of the powertrain, optimize the difficulty of spatial layout, and improve the driving performance of the vehicle. At the same time, it can reduce the cost of the crankshaft counterweight, generator housing, generator rotor and its bearings in the powertrain; the winding is arranged in layers to maximize the length of the rotor winding cutting the magnetic flux line, thereby improving the work efficiency per unit volume of the generator rotor.

[0018] (2) The horizontally opposed two-cylinder layout has the same two pairs of moving masses on the left and right sides of the crankshaft at the same operating point, compared with the in-line layout, which greatly optimizes the vibration and improves the comfort of the whole vehicle. Compared with four-cylinder or three-cylinder, the volume of the two-cylinder is smaller, the difficulty of vehicle layout is reduced, and the room for improving the driving performance of the whole vehicle is increased. At the same time, the number of moving parts is reduced, the production and processing technology is simplified, and the cost is greatly reduced.

[0019] (3) It can reduce the accessories such as generator, starter, turbocharger, etc., reduce the weight of the powertrain, and reduce the fuel consumption of the whole vehicle.

[0020] (4) By using a staggered layout, the lubrication system components and the cooling system components are arranged using gaps to make the structure more compact and the functions more optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0022] Figure 1 It is a schematic structural diagram of the crank-connecting rod mechanism of the range-extended engine of the present invention.

[0023] Figure 2 It is a schematic diagram of the distribution structure of the rotor winding embodiment 1 of the range-extended engine of the present invention.

[0024] Figure 3 It is a schematic diagram of the distribution structure of the rotor winding embodiment 2 of the range-extended engine of the present invention.

[0025] Figure 4 It is a schematic diagram of the distribution structure of the rotor winding embodiment 3 of the range-extended engine of the present invention.

[0026] Figure 5 It is a schematic diagram of the distribution structure of the rotor winding embodiment 4 of the range-extended engine of the present invention.

[0027] Figure 6 It is a schematic diagram of the distribution structure of the rotor winding embodiment 5 of the range-extended engine of the present invention.

[0028] Figure 7 It is a schematic diagram of the front view structure of the range-extended engine of the present invention.

[0029] Figure 8 It is a schematic diagram of the structure of a top view of the range-extended engine of the present invention.

[0030] In the figure: 11-left cylinder; 111-left piston; 112-left connecting rod; 12-right cylinder; 121-right piston; 122-right connecting rod; 2-crankshaft; 3-rotor winding; 41-left DVVT timing mechanism; 42-right DVVT timing mechanism; 43-gear train cover; 51-water pump; 52-cooling line; 61-oil cooler; 62-oil filter; 63-oil dipstick; 64-oil-gas separator; 65-oil pan; 71-intake manifold; 72-air filter; 73-intake throttle valve; 8-reinforcement plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0032] In the description of the present invention, it should be noted that the term "including" and its variations represent open inclusion, that is, "including but not limited to". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In order to at least partially solve the above problems and one or more of other potential problems, the present invention provides an extended-range engine, such as Figure 1 As shown, it includes a machine body, the machine body includes a cylinder block and a crankcase, the cylinder block includes a left cylinder 11 and a right cylinder 12, the left cylinder 11 and the right cylinder 12 are respectively provided with a left piston 111 and a right piston 121, the crankcase is provided with a crankshaft 2, the left piston 111 and the right piston 121 are respectively connected to the two ends of the crankshaft 2 through a left connecting rod 112 and a right connecting rod 122; a generator rotor is provided on the crankshaft 2, the generator rotor includes a rotor winding 3, the rotor winding 3 is provided on the crank of the crankshaft 2, forming a first counterweight block; a generator stator is adapted to be provided in the machine body. The machine body also includes a main bearing seat, which is provided below the machine body for fixing the crankshaft 2, and a generator collector ring can be provided in the main bearing seat. The generator can also adopt an excitation method combining self-excitation and external excitation to avoid being unable to start due to exhaustion of power. In this way, the engine and generator are integrated to reduce the weight and volume of the powertrain, optimize the difficulty of space layout, improve the driving performance of the whole vehicle, and at the same time reduce the cost of the crankshaft 2 counterweight, generator housing, generator rotor and its bearings in the powertrain. It can also reduce accessories such as generators, starters, turbochargers, etc., reduce the weight of the powertrain, and reduce the fuel consumption of the whole vehicle.

[0034] The crankshaft 2 includes a plurality of cranks. In order to balance the rotational centrifugal force and torque of the crankshaft 2, the reciprocating inertia force and torque of the connecting rod, the crankshaft 2 is usually provided with a second counterweight. When the rotor winding 3 is provided on the crank, the crankshaft 2 includes at least one rotor winding 3 and at least one second counterweight. The rotor winding 3 and the second counterweight are provided on each crank, respectively. The rotor winding 3 and the second counterweight are provided in a mixed manner so that the rotor winding 3 cooperates with the original second counterweight to balance the crankshaft 2. The second counterweight can also be removed, and the rotor winding 3 is provided on each crank to increase the power generation of the generator. At the same time, the rotor windings 3 cooperate with each other to balance the crankshaft 2. The rotor winding 3 can be flexibly provided on the crankshaft 2 as needed.

[0035] Specifically, when the crank of the crankshaft 2 is provided with a second counterweight, the second counterweight can be removed or partially removed and replaced with the rotor winding 3. Preferably, the mass and shape of the rotor winding 3 can be consistent with the removed second counterweight, so that when the crankshaft 2 moves, the scanning trajectory of the rotor winding 3 is consistent with the scanning trajectory of the original second counterweight. When the two cranks adapted to the crankshaft 2 are not provided with counterweights themselves, the rotor windings 3 can also be provided on the two cranks respectively, so that the shapes of the two rotor windings 3 can be consistent with the shapes of the original cranks, and the size of the rotor winding 3 can also be increased according to the layout space to prevent the rotor winding 3 from interfering with the crankshaft 2 when the crankshaft 2 moves, and at the same time, the masses of the two rotor windings 3 are the same, and the static / dynamic balance of the original crank-connecting rod mechanism itself is not destroyed. In this way, when the rotor winding 3 moves with the crankshaft 2, interference can be prevented, while the volume of the rotor winding 3 is maximized, and the crankshaft 2 is still balanced. A mounting hole may be provided on the crank, and the rotor winding 3 may be detachably connected to the crank by bolts, or the rotor winding 3 may be detachably connected to the crank by a winding mounting base, in which case the winding mounting base and the rotor winding 3 form a first counterweight. The mass of the second counterweight of the crankshaft 2 has been reduced to a minimum for weight reduction and cost reduction considerations. Under the condition of ensuring the mechanical strength of the crankshaft 2, the original heavy iron counterweight is eliminated and the second counterweight is replaced by the rotor winding 3, which can further reduce the weight of the crankshaft 2.

[0036] In order to keep the crankshaft 2 balanced, when the rotor winding 3 and the second counterweight are respectively arranged on each crank, the projections of each rotor winding 3 and the second counterweight on the cross section of the crankshaft 2 are evenly distributed along a 360° circumference. When the rotor winding 3 is arranged on each crank, the projections of each rotor winding 3 on the cross section of the crankshaft 2 are evenly distributed along a 360° circumference; or, the projections of a part of the rotor winding 3 on the cross section of the crankshaft 2 and the projections of another part of the rotor winding 3 on the cross section of the crankshaft 2 are respectively symmetrically arranged relative to the axis of the main shaft of the crankshaft 2.

[0037] It can be understood that the cross section of the crankshaft 2 can be selected as the cross section at the center of the body, or can be selected as the cross section passing through the main axis of the crankshaft 2, or can be selected as the cross section of the connecting rod shaft of the crankshaft 2.

[0038] As a preferred embodiment of the present invention, Figure 1 As shown, the engine includes a two-cylinder engine, the left cylinder 11 and the right cylinder 12 are horizontally opposed, the left cylinder 11 and the right cylinder 12 are located on the same horizontal plane and arranged on both sides of the crankshaft 2, respectively extending to the left and right sides of the engine, and the axes of the left cylinder 11 and the right cylinder 12 are not coaxial, and the left piston 111 and the left connecting rod 112 and the right piston 121 and the right connecting rod 122 are running in opposite directions in any operating condition of the engine. The engine adopts a horizontally opposed two-cylinder arrangement. Compared with the in-line arrangement, the two pairs of moving masses on the left and right sides of the crankshaft 2 at the same operating point are the same, the vibration is greatly optimized, and the comfort of the whole vehicle is improved; compared with the four-cylinder or three-cylinder, the two-cylinder volume is reduced, the difficulty of the whole vehicle arrangement is reduced, and the space for improving the driving performance of the whole vehicle is increased; at the same time, the number of moving parts is reduced, the production and processing technology is simplified, and the cost is greatly reduced. Correspondingly, the crankshaft 2 includes four cranks and a first rotor winding A, a second rotor winding B, a third rotor winding C and a fourth rotor winding D which are respectively arranged on the four cranks and are sequentially distributed along the main axis extension direction of the crankshaft 2.

[0039] In one embodiment of the present invention, Figure 2 As shown, the projections of the first rotor winding A and the second rotor winding B on the cross section of the crankshaft 2 are symmetrically arranged relative to the axis of the main shaft of the crankshaft 2, and the projections of the third rotor winding C and the fourth rotor winding D on the cross section of the crankshaft 2 are symmetrically arranged relative to the axis of the main shaft of the crankshaft 2, so that the two rotor windings 3 located on both sides of the central cross section of the body are symmetrically arranged.

[0040] A rotor winding 3 located on one side of the central cross section of the machine body may also be arranged symmetrically with a rotor winding 3 located on the other side of the central cross section of the machine body.

[0041] In one embodiment of the present invention, Figure 3 As shown, the projections of the first rotor winding A and the fourth rotor winding D on the cross section of the crankshaft 2 are symmetrically arranged relative to the axis of the main shaft of the crankshaft 2, and the projections of the second rotor winding B and the third rotor winding C on the cross section of the crankshaft 2 are symmetrically arranged relative to the axis of the main shaft of the crankshaft 2.

[0042] In one embodiment of the present invention, Figure 4 As shown, the projections of the first rotor winding A and the third rotor winding C on the cross section of the crankshaft 2 are symmetrically arranged relative to the axis of the main shaft of the crankshaft 2, and the projections of the second rotor winding B and the fourth rotor winding D on the cross section of the crankshaft 2 are symmetrically arranged relative to the axis of the main shaft of the crankshaft 2.

[0043] The two symmetrically arranged rotor windings 3 form a pair of rotor windings 3, such as Figure 2-Figure 4 As shown, the projections of the two pairs of rotor windings 3 on the cross section of the crankshaft 2 can be arranged alternately. Figure 5 As shown, the projections of the two pairs of rotor windings 3 on the cross section of the crankshaft 2 may also overlap.

[0044] Preferably, if Figure 6 As shown, the projections of the first rotor winding A, the second rotor winding B, the third rotor winding C and the fourth rotor winding D on the cross section of the crankshaft 2 are evenly distributed along a 360° circumference.

[0045] The two pairs of rotor windings 3 can be set to have the same mass and size, or the sizes and masses can be set separately according to the balance of the crankshaft 2. It can be understood that Figure 2-Figure 6 In order to distinguish the two pairs of rotor windings 3, the sizes of the two pairs of rotor windings 3 are set differently for exemplary purposes only.

[0046] The axial length of the crankshaft 2 is short, and the layout space is limited, but the circumferential space is sufficient. In order to increase the power generation of the generator, the rotor winding 3 can be arranged in layers along the radial direction of the crankshaft 2. The rotor winding 3 is in the shape of an arc around the axis of the main shaft of the crankshaft 2, and the center angle α of the arc is 90°-160°. Preferably, the center angle α of the arc is 130°-160°. For example, the center angle α of the arc can be set to 90°, 95°, 100°, 105°, 110°, 115°, 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, etc., to increase the length of the rotor winding 3 cutting the magnetic flux line while avoiding the rotor winding 3 being 360° circular to affect the operation and dynamic balance of the crankshaft 2. Each of the rotor windings 3 is provided with a plurality of cores along the radial direction of the crankshaft 2, and each core is provided with a sub-winding, so that the length of the magnetic flux line cut by the rotor winding 3 is maximized by arranging the sub-windings in layers, thereby improving the unit volume work efficiency of the generator rotor. Preferably, the number of the cores is 4-6, the distance between adjacent cores is 8-15mm, and the radial thickness of the sub-winding is 40-60mm. For example, an iron core can be arranged every 10mm, and 4, 5 or 6 iron cores can be arranged according to the layout space in the crankcase, and each core is processed into a sub-winding, and the radial thickness of each sub-winding can be set to 40mm, 45mm, 50mm, 55mm, 60mm, etc., to avoid the limited space being occupied by the longitudinal coil.

[0047] refer to Figure 7 and Figure 8As shown, the left cylinder 11 and the right cylinder 12 are respectively provided with a left cylinder head and a right cylinder head, a left cylinder head cover, a right cylinder head cover, a left DVVT timing mechanism 41 and a right DVVT timing mechanism 42. The engine body is integrated with a cooling system, and a water pump 51 is installed on the rear end surface of the right cylinder head through a water pump mounting seat. The left cylinder head and the right cylinder head are both provided with a cylinder water inlet and a cylinder water outlet. The water outlet and the water inlet of the water pump 51 body are directly connected to the cylinder water inlet and the cylinder water outlet of the right cylinder head, respectively, so that the water pump 51 body is directly connected to the water channel of the right cylinder head, reducing the connection pipeline and saving the layout space. The water pump 51 shell is provided with a water inlet and a water outlet. The water outlet and the water inlet of the water pump 51 shell are respectively connected to the cylinder water inlet and the cylinder water outlet of the left cylinder head and the oil cooler 61 through the cooling pipeline 52. The water pump 51 body is integrated with an electronic thermostat to control the cooling water temperature. The pipelines and flow channels can be designed by CFD simulation calculation to make the cooling water flow and flow resistance of the cylinder heads on both sides consistent. The engine body adopts a split cylinder head. Preferably, the oil channel, water channel and moving part cavity of the two cylinder heads are the same, which can reduce the number and types of molds.

[0048] The two cylinders use a dual variable valve timing mechanism (DVVT). The sprockets of the left and right timing mechanisms are set at the front end of the crankshaft 2. The gears take power from the sprockets through the chain to drive the camshafts on the left and right sides. The sprockets, chains and camshafts are covered by a gear train cover 43 to prevent dust from entering and causing wear of the gear train, reducing its service life. A multi-V belt pulley can also be set at the front end of the crankshaft 2 to facilitate power take-off of other components of the vehicle.

[0049] The front of the left cylinder head cover is connected to the camshaft support seat of the left DVVT timing mechanism 41 and the right DVVT timing mechanism 42, which is used to cover and support the camshaft of the cylinder at the far end of the gear train. The rear of the right cylinder head cover is provided with a power take-off port, which drives the water pump 51 to operate through a chain drive, and the water pump 51 takes power from the DVVT exhaust side cam.

[0050] refer to Figure 7 and Figure 8As shown, the engine body is also integrated with a lubrication system, with an oil cooler 61 and an oil filter 62 arranged on the lower right side of the engine body, the oil cooler 61 located above the oil filter 62, an oil dipstick 63 and an oil-gas separator 64 arranged on the upper left side of the engine body, an oil pump arranged on the front end cover of the crankshaft 2, and the oil cooler 61 is cooled by cooling water drawn from the engine body. The oil pump draws oil from the oil pan 65 through a filter and delivers it to the engine body oil passage, first filtering impurities through the oil filter 62, and then entering the oil cooler 61 to reduce the oil temperature to the standard temperature. The first branch of the treated oil flows into the main oil passage and is pressed into the gaps between the three main bearings and the crankshaft 2 respectively, the second branch flows into the cylinder body and is transferred to the moving part cavity of the cylinder head to lubricate the moving parts, and the third branch is sprayed into the inner surface of the piston through the piston cooling nozzle to cool the piston after the oil pressure reaches the limit. The internal air pressure of the crankcase increases due to the oil mist, which can be filtered through the oil-gas separator 64 and then flow into the intake manifold 71. A pressure control valve is provided in front of the intake manifold 71 to avoid an increase in negative pressure oil in the crankcase.

[0051] The fuel system of the engine adopts a high-pressure common rail system. The fuel pump is powered by the DVVT intake cam and supplied to the injectors on both sides through the common rail pipe. The intake system of the engine adopts a naturally aspirated form. The air is sucked in by the axial filtering air filter 72, and the intake volume is controlled by the intake throttle valve 73 before being conducted to the two-way intake manifold 71, and enters the left cylinder 11 and the right cylinder 12 respectively. The intake pipeline can be designed by CFD simulation calculation to make the intake flow and flow resistance of the two cylinders consistent. In order to improve the load-bearing capacity of the body, preferably, the body can adopt a gantry body, and the gantry frames on both sides are connected by a reinforcing plate 8 to optimize the body strength.

[0052] Integrating the engine and generator can reduce the weight and volume of the powertrain, optimize the difficulty of spatial layout, and improve the driving performance of the vehicle. At the same time, it can reduce the cost of the crankshaft 2 counterweight, the generator housing, the generator rotor and its bearings in the powertrain. It can also reduce accessories such as the generator, starter, and turbocharger, reduce the weight of the powertrain, and reduce the fuel consumption of the vehicle. The engine integrates the cooling system and lubrication system, and the layout is staggered. The lubrication system components and cooling system components are arranged in gaps, making the structure more compact and the functions more optimized.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A range-extended engine, comprising a body, the body comprising a cylinder block and a crankcase, the cylinder block comprising a left cylinder and a right cylinder, the left cylinder and the right cylinder are respectively provided with a left piston and a right piston, the crankcase is provided with a crankshaft, the left piston and the right piston are respectively connected to the two ends of the crankshaft through a left connecting rod and a right connecting rod; characterized in that: The crankshaft is provided with a generator rotor, the generator rotor includes a rotor winding, and the rotor winding is provided on the crank of the crankshaft to form a first counterweight block; the body is adaptively provided with a generator stator.

2. The range-extended engine according to claim 1, characterized in that: The crankshaft comprises a plurality of cranks, at least one rotor winding and at least one second counterweight, wherein the rotor winding and the second counterweight are respectively arranged on each crank; or the crankshaft comprises a plurality of cranks, and a rotor winding is arranged on each crank.

3. The range-extended engine according to claim 2, characterized in that: When the rotor winding and the second counterweight are respectively arranged on each crank, the projections of each rotor winding and the second counterweight on the cross section of the crankshaft are evenly distributed along a 360° circumference; When a rotor winding is arranged on each crank, the projections of each rotor winding on the crankshaft cross section are evenly distributed along a 360° circle; or, the projections of one part of the rotor winding on the crankshaft cross section and the projections of another part of the rotor winding on the crankshaft cross section are symmetrically arranged relative to the axis of the crankshaft main shaft.

4. The range-extended engine according to claim 3, characterized in that: The engine includes a two-cylinder engine, the left cylinder and the right cylinder are horizontally opposed, and the axes of the left cylinder and the right cylinder are not coaxial; the crankshaft includes four cranks and a first rotor winding A, a second rotor winding B, a third rotor winding C and a fourth rotor winding D which are respectively arranged on the four cranks and distributed in sequence along the main axis extension direction of the crankshaft.

5. The range-extended engine according to claim 4, characterized in that: The projections of the first rotor winding A and the second rotor winding B on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft, and the projections of the third rotor winding C and the fourth rotor winding D on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft; or the projections of the first rotor winding A and the fourth rotor winding D on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft, and the projections of the second rotor winding B and the third rotor winding C on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft; or the projections of the first rotor winding A and the third rotor winding C on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft, and the projections of the second rotor winding B and the fourth rotor winding D on the cross section of the crankshaft are symmetrically arranged relative to the axis of the crankshaft main shaft.

6. The range-extended engine according to claim 5, characterized in that: The projections of the first rotor winding A, the second rotor winding B, the third rotor winding C and the fourth rotor winding D on the cross section of the crankshaft are evenly distributed along a 360° circumference.

7. The range-extended engine according to any one of claims 1 to 6, characterized in that: The rotor winding is in an arc shape surrounding the axis of the crankshaft main shaft, and the central angle α of the arc is 90°-160°. Preferably, the central angle α of the arc is 130°-160°; each of the rotor windings is provided with a plurality of iron cores along the radial direction of the crankshaft, and each iron core is provided with a sub-winding; preferably, the number of the iron cores is 4-6, the distance between adjacent iron cores is 8-15mm, and the radial thickness of the sub-winding is 40-60mm.

8. The range-extended engine according to claim 1, characterized in that: The machine body also includes a main bearing seat, in which a generator collector ring is arranged.

9. The range-extended engine according to claim 1, characterized in that: The left cylinder and the right cylinder are respectively provided with a left cylinder head and a right cylinder head, a left cylinder head cover, a right cylinder head cover, a left DVVT timing mechanism and a right DVVT timing mechanism; the left cylinder head and the right cylinder head are both provided with a cylinder water inlet and a cylinder water outlet, and the right cylinder head is provided with a water pump, the water outlet and the water inlet of the water pump body are respectively directly connected to the cylinder water inlet and the cylinder water outlet of the right cylinder head, and the water outlet and the water inlet of the water pump housing are respectively connected to the cylinder water inlet and the cylinder water outlet of the left cylinder head through a cooling pipeline; the front part of the left cylinder head cover is connected to the camshaft support seat of the left DVVT timing mechanism and the right DVVT timing mechanism, and the rear part of the right cylinder head cover is provided with a power take-off port; preferably, the oil channel, water channel and moving part cavity of the left cylinder head and the right cylinder head are the same.

10. The range-extended engine according to claim 1, characterized in that: The engine body is integrated with a lubrication system, an oil cooler and an oil filter are arranged on the lower right side of the engine body, an oil dipstick and an oil-gas separator are arranged on the upper left side of the engine body, and an oil pump is arranged on the front end cover of the crankshaft.

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