Range extender assembly taking natural gas as fuel

Abstract

The utility model discloses a range extender assembly with natural gas as fuel, and belongs to the technical field of automobile power systems. The device mainly comprises a gas engine and a generator, the generator is fixedly connected with the gas engine, a flywheel and a torsion damper are arranged between the gas engine and the generator, the flywheel is fixedly connected with the rear end of a crankshaft of the gas engine, and the torsion damper is fixedly arranged on the side, away from the crankshaft of the engine, of the flywheel. The power output end of the generator is connected with the torsion damper. By means of natural gas and electricity hybrid power, the problems of gasoline steam loss and emission are solved, parts such as a high-pressure oil tank are omitted, the production cost is greatly reduced, natural gas is used as fuel, and the fuel cost of a user is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of automotive power system technology, and more specifically, it relates to a range extender assembly that uses natural gas as fuel. Background Technology

[0002] With the rapid development of new energy vehicles, hybrid vehicles have also occupied an important position in the market. Because vehicles can utilize two energy sources simultaneously during operation, they can automatically select the optimal energy combination based on different driving conditions to achieve the best driving performance and fuel economy. Existing hybrid vehicles mainly use a mixture of fuel and electricity. For example, patent CN112009454A discloses a method for optimizing the fuel consumption of range-extended hybrid vehicles. This method allows for battery-powered range extension under normal conditions, while using fuel when the battery charge is low. It also achieves high-efficiency and constant-power output from the range extender, effectively avoiding frequent switching and power fluctuations, fully demonstrating the enormous potential of hybrid vehicles in terms of range and energy saving.

[0003] However, the above-mentioned hybrid electric vehicles also have the following drawbacks: 1. To prevent fuel vapor leakage, hybrid electric vehicles require high-pressure fuel tanks, FTIV valves, and other parts to lock the fuel vapor in the fuel tank when the engine stops running, which increases costs; 2. In remote areas such as Xinjiang and Gansu, gas stations are scarce, making fuel replenishment for hybrid electric vehicles difficult and extremely inconvenient to use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a range extender assembly that uses natural gas as fuel. By using a combination of natural gas and electric power, it solves the problems of gasoline vapor loss and emissions, thereby eliminating parts such as high-pressure fuel tanks, greatly reducing production costs, and using natural gas as fuel reduces fuel costs for users.

[0005] The range extender assembly using natural gas as fuel includes a gas engine and a generator. The generator is fixedly connected to the gas engine. A flywheel and a torsional damper are provided between the gas engine and the generator. The flywheel is fixedly connected to the rear end of the crankshaft of the gas engine. The torsional damper is fixedly installed on the side of the flywheel away from the engine crankshaft. The power output end of the generator is connected to the torsional damper.

[0006] Preferably, a gas supply mechanism is fixedly connected to the gas engine. The gas supply mechanism includes a gas injection rail, which is connected to the gas supply system. Multiple gas pipes are connected to the gas injection rail, and the gas pipes are connected to the intake manifold on the gas engine cylinder block.

[0007] Preferably, the bottom of the gas injection rail is fixedly connected with an injection rail support, an L-shaped support is fixedly connected on the injection rail support, and the L-shaped support is fixedly connected with the top of the gas engine.

[0008] Preferably, a water pump is fixedly connected on the gas engine, the water pump is a mechanical water pump, a transmission wheel one is rotatably connected on the water pump, a transmission wheel two is arranged on the front end of the crankshaft, and the transmission wheel one is in transmission connection with the transmission wheel two through a transmission member.

[0009] Preferably, the transmission wheel one is a belt wheel, the transmission wheel two is a damping belt wheel, and the transmission member is a transmission belt.

[0010] Preferably, a gas pressure reducing valve is arranged on the gas engine, and the gas supply system is connected with the gas injection rail through the gas pressure reducing valve.

[0011] Preferably, a water inlet of the pressure reducing valve and a water outlet of the pressure reducing valve are arranged on the gas pressure reducing valve, a water inlet circuit and a water outlet circuit are arranged on the gas engine, one end of the water inlet circuit and the water outlet circuit are respectively in communication with the water pump, the other end of the water inlet circuit is in communication with the water inlet of the pressure reducing valve, and the other end of the water outlet circuit is in communication with the water outlet of the pressure reducing valve.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. The gas supply mechanism is additionally arranged on the gas engine, the gas supply mechanism divides the natural gas into multiple paths through the gas injection rail, and then the natural gas enters the corresponding intake manifold of each cylinder of the gas engine, mixes with air in the intake manifold to form mixed gas, and then enters the cylinder for combustion, so that the gas supply mechanism ensures the accurate supply of the natural gas, the gas engine realizes more sufficient combustion, and the fuel utilization rate is improved.

[0014] 2. The front end of the gas engine only has one load of the water pump, the engine waste heat is used to heat the gas pressure reducing valve, the temperature of the natural gas in the pressure reducing process is prevented from being reduced, the temperature of the natural gas is kept more suitable, and full combustion is facilitated.

[0015] 3. The utility model uses natural gas as fuel, the price is cheaper than gasoline, the use of natural gas as fuel greatly reduces the fuel cost of users, the emission pollutants of natural gas are less, the loss and emission of gasoline vapor do not need to be considered, the structures such as a high-pressure oil tank, a carbon tank, a carbon tank electromagnetic valve, an adsorption pipeline, a desorption pipeline and an FTIV valve are omitted, the structure of the range extender assembly is more simple, and the production cost is greatly reduced.

[0016] 4. The utility model is suitable for remote areas such as Xinjiang and Gansu, gas stations are less distributed, natural gas is more convenient to add, and the problem of fuel supply difficulty in remote areas is solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model discloses a structure schematic drawing of the utility model;

[0018] Figure 2 The utility model discloses a split schematic drawing of the utility model;

[0019] Figure 3 It is the connection schematic drawing of gas engine and gas supply mechanism;

[0020] Figure 4 It is the connection schematic drawing of gas engine and water pump;

[0021] Figure 5 It is the structure schematic drawing of gas supply mechanism.

[0022] In the drawing, 1, gas engine;101, transmission wheel two;102, pressure reducing valve water inlet;103, pressure reducing valve water outlet;2, generator;3, gas supply mechanism;301, gas jet rail;302, gas pipe;303, jet rail support;304, L-shaped support;4, water pump;401, transmission wheel one;402, transmission part;5, flywheel;6, torsional damper. DETAILED DESCRIPTION

[0023] The utility model will be further explained in connection with the drawings:

[0024] The orientation terms involved in the paragraph of detailed description are only for the convenience of the person skilled in the art to understand the technical solutions recorded in the application according to the visual orientation shown in the drawings. Except for explicit provisions and limitations, the terms "set", "install", "connect" and the like should be understood broadly, and the person skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances.

[0025] As Figures 1 to 5 As shown in the figure, a range extender assembly with natural gas as fuel includes a gas engine 1 and a generator 2, the generator 2 is connected with the gas engine 1 through bolt fastening, a flywheel 5 and a torsional damper 6 are arranged between the gas engine 1 and the generator 2, the flywheel 5, the torsional damper 6 and the generator 2 are all prior art and are commercially available. When installing, the flywheel 5 is fixedly connected with the rear end of the crankshaft of the gas engine 1 through a plurality of bolts, the flywheel 5 can store energy during the power stroke of the gas engine 1 and release energy during other strokes, so as to ensure the stability of the operation of the gas engine 1. The torsional damper 6 is fixedly connected with the side of the flywheel 5 away from the crankshaft of the engine through a plurality of bolts, so that the torsional vibration generated during the operation of the gas engine 1 can be effectively reduced, and the vibration is avoided from being transmitted to the generator 2, so as to improve the working stability and power generation efficiency of the generator 2 and prolong the service life of the generator 2.

[0026] The power output end of the generator 2 is connected with the torsional damper 6, specifically, the power output end of the generator 2 is a spline shaft, the middle part of the torsional damper 6 is provided with a spline groove matched with the spline shaft, and the power output of the generator 2 is realized through the direct connection of the spline shaft and the spline groove. In the embodiment, the speed ratio of the gas engine 1 and the generator 2 is 1:1, and there is no speed change transmission mechanism, that is, the rotating speed of the generator 2 always keeps consistent with the rotating speed of the gas engine 1, and the mechanical energy output by the gas engine 1 is converted into electric energy.

[0027] The gas supply mechanism 3 is fixedly connected to the gas engine 1, the gas engine 1 is provided with a gas pressure reducing valve, the gas supply mechanism 3 comprises a gas injection rail 301, the gas injection rail 301 is communicated with the gas supply system through the gas pressure reducing valve, and the gas pressure reducing valve can reduce the pressure of the high-pressure natural gas delivered by the gas supply system, so that the pressure reaches the range in which the gas engine 1 can be normally used, and the safety and stability of the gas supply are ensured. The gas injection rail 301 is communicated with a plurality of gas pipes 302, in the embodiment, the gas pipes 302 are four, and the gas pipes 302 are communicated with the intake manifolds on the cylinder body of the gas engine 1. That is, the natural gas is introduced into the gas injection rail 301 from the gas supply system (gas tank) through the pipeline and the gas pressure reducing valve, and then is divided into four paths through the gas injection rail 301, and is evenly introduced into the corresponding intake manifolds of the cylinders of the gas engine 1, respectively, mixes with air in the intake manifolds to form a mixture, and then is introduced into the cylinders for combustion. The gas supply mechanism 3 ensures the accurate supply of natural gas, so that the gas engine 1 realizes more sufficient combustion and improves the fuel utilization rate.

[0028] In order to ensure the stable installation of the gas injection rail 301, the gas injection rail 301 is fixedly connected with a rail support 303 at the bottom, the rail support 303 is fixed with an L-shaped support 304, and the L-shaped support 304 is fixed to the position near the intake side of the cylinder cover side of the top of the gas engine 1 through two screws. In this way, the length of the gas pipe 302 is shortened, the structure is more compact, and the L-shaped support 304 can prevent the displacement or loosening of the gas injection rail 301 of the gas engine 1 during vibration or vehicle driving, and ensure the stability of the gas supply when the gas injection rail 301 is firmly fixed on the gas engine 1.

[0029] The gas engine 1 is fixedly connected with a water pump 4, the water pump 4 is a mechanical water pump, a transmission wheel one 401 is rotatably connected to the water pump 4, a transmission wheel two 101 is arranged at the front end of the crankshaft, and the transmission wheel one 401 is in transmission connection with the transmission wheel two 101 through a transmission member 402. Specifically, the transmission wheel one 401 is a belt wheel, the transmission wheel two 101 is a damping belt wheel, and the transmission member 402 is a transmission belt. The gas engine 1 is preferably a 2.0L self-suction engine, the front end of the engine has only the mechanical water pump, and parts such as a high-pressure oil tank and an FTIV valve are omitted, so that the structure is more simple and convenient. When the crankshaft of the gas engine 1 rotates, the transmission wheel two 101 is driven to rotate, power is transmitted to the transmission wheel one 401 through the transmission belt, and thus the water pump 4 is driven to work. The transmission mode is simple and reliable, and can ensure that the water pump 4 works synchronously with the operation of the gas engine 1, so as to provide stable power for the cooling system of the gas engine 1.

[0030] The gas pressure reducing valve is provided with a pressure reducing valve water inlet 102 and a pressure reducing valve water outlet 103, the gas engine 1 is provided with an inlet water circuit and an outlet water circuit, one end of the inlet water circuit and the outlet water circuit is in communication with the water pump 4, the other end of the inlet water circuit is in communication with the pressure reducing valve water inlet 102, and the other end of the outlet water circuit is in communication with the pressure reducing valve water outlet 103. The engine waste heat is used to heat the gas pressure reducing valve, so that the temperature of the natural gas is prevented from being reduced during the pressure reducing process, the natural gas is kept at a more suitable temperature, and full combustion is facilitated.

[0031] Working principle:

[0032] The gas supply system supplies natural gas to the gas injection rail 301 through the pipeline and the gas pressure reducing valve, the gas injection rail 301 adjusts and distributes the natural gas, the natural gas uniformly enters the corresponding intake manifold of each cylinder of the gas engine 1 through the gas pipe 302, and the natural gas is mixed with air in the intake manifold to form a mixture, and then enters the cylinder for combustion. The gas engine 1 generates energy by burning natural gas, and then drives the flywheel 5, the torsional damper 6 and the generator 2 in sequence, the rotor in the generator 2 rotates in the stator, performs a cutting magnetic induction line motion, generates an induced electromotive force, discharges to the outside, charges the power battery or directly provides energy for the driving motor.

[0033] When the gas engine 1 works, the transmission wheel two 101 drives the transmission wheel one 401 to rotate, the water pump 4 starts to work, and the inlet water circuit and the outlet water circuit form a loop. The water heated by the gas engine 1 enters the gas pressure reducing valve through the pressure reducing valve water inlet 102, heats the gas pressure reducing valve, and then flows into the water inlet of the water pump 4 through the pressure reducing valve water outlet 103, so as to complete the water heating cycle of the gas pressure reducing valve, so that the temperature of the natural gas is prevented from being reduced during the pressure reducing process, the natural gas is kept at a more suitable temperature, and full combustion is facilitated.

[0034] Compared with other oil-electricity hybrid assemblies, the utility model only takes natural gas as fuel, and the natural gas has less emission pollutants, and the loss and emission of gasoline vapor do not need to be considered, so that the high-pressure oil tank, carbon tank, carbon tank solenoid valve, adsorption pipeline, desorption pipeline, FTIV valve and other structures are omitted, the range extender assembly structure is more simple and convenient, and the production cost is greatly reduced.

[0035] Finally, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A range extender assembly using natural gas as fuel, characterized in that: It includes a gas engine (1) and a generator (2). The generator (2) is fixedly connected to the gas engine (1). A flywheel (5) and a torsional damper (6) are provided between the gas engine (1) and the generator (2). The flywheel (5) is fixedly connected to the rear end of the crankshaft of the gas engine (1). The torsional damper (6) is fixedly installed on the side of the flywheel (5) away from the engine crankshaft. The power output end of the generator (2) is connected to the torsional damper (6). The gas engine (1) is fixedly connected to a gas supply mechanism (3), which includes a gas injection rail (301). The gas injection rail (301) is connected to the gas supply system. Multiple gas pipes (302) are connected to the gas injection rail (301). The gas pipes (302) are connected to the intake manifold on the cylinder block of the gas engine (1). The bottom of the gas injection rail (301) is fixedly connected to the injection rail bracket (303), and an L-shaped bracket (304) is fixed on the injection rail bracket (303). The L-shaped bracket (304) is fixedly connected to the top of the gas engine (1).

2. The range extender assembly using natural gas as fuel according to claim 1, characterized in that: A water pump (4) is fixedly connected to the gas engine (1). The water pump (4) is a mechanical water pump. A transmission wheel (401) is rotatably connected to the water pump (4). A transmission wheel (101) is provided at the front end of the crankshaft. The transmission wheel (401) is connected to the transmission wheel (101) through a transmission component (402).

3. The range extender assembly using natural gas as fuel according to claim 2, characterized in that: The first transmission wheel (401) is a pulley, the second transmission wheel (101) is a shock-absorbing belt pulley, and the transmission component (402) is a transmission belt.

4. The range extender assembly using natural gas as fuel according to claim 2, characterized in that: The gas engine (1) is equipped with a gas pressure reducing valve, and the gas supply system is connected to the gas injection rail (301) through the gas pressure reducing valve.

5. The range extender assembly using natural gas as fuel according to claim 4, characterized in that: The gas pressure reducing valve is provided with a pressure reducing valve inlet (102) and a pressure reducing valve outlet (103). The gas engine (1) is provided with an inlet circuit and an outlet circuit. One end of the inlet circuit and the outlet circuit are respectively connected to the water pump (4). The other end of the inlet circuit is connected to the pressure reducing valve inlet (102), and the other end of the outlet circuit is connected to the pressure reducing valve outlet (103).

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