Range extender capable of improving reliability and reducing oil consumption and range-extended vehicle

Abstract

The utility model relates to the technical field of range extender engines, in particular to a range extender capable of improving reliability and reducing oil consumption and a range-extended vehicle. The range extender comprises an engine, a generator and a front end wheel train. The generator and the front-end wheel train are arranged at the two axial ends of a crankshaft of the engine respectively, the front-end wheel train is provided with a transmission wheel set and a crankshaft position sensor, and one belt pulley of the transmission wheel set is provided with a signal gear ring. In the application, any belt pulley in the transmission wheel set of the front wheel train is provided with the signal gear ring, and the crankshaft position sensor is aligned with the signal gear ring to detect the rotation state of the crankshaft. Therefore, on the basis that a flywheel shell structure is omitted, the signal gear ring and the front-end gear train are combined, so that the original axial length is kept, and the problem that the crankshaft position sensor is interfered by the generator is solved.

Description

Technical Field

[0001] This application relates to the field of range extender engine technology, and more particularly to a range extender and range-extended vehicle that improves reliability and reduces fuel consumption. Background Technology

[0002] In range-extended electric vehicles, the engine of the range extender drives a generator to produce electricity, which in turn charges the vehicle's battery. The transmission connection between the engine and generator can be either a rigid connection or a flexible connection.

[0003] In a flexible connection structure, the drive shafts of the engine and generator are not coaxial. In a rigid connection structure, the drive shafts of the generator and engine are coaxial. The range extender with a rigid connection structure has a smaller overall size and a more compact layout.

[0004] In rigid connection structures, the generator is directly mounted on one side of the flywheel housing, and the engine crankshaft is fixed to the generator rotor. To improve the integration of the range extender, existing designs combine the crankshaft flywheel and generator rotor, removing the traditional engine flywheel housing and reducing the axial length between the generator and the engine.

[0005] While this structure, which eliminates the flywheel housing, reduces the axial length, it presents a technical problem: the crankshaft position sensor may experience electromagnetic interference from a nearby generator.

[0006] To prevent electromagnetic interference to the crankshaft position sensor caused by the proximity of the generator and engine, this application provides a range extender and range-extended vehicle that improves reliability and reduces fuel consumption. Utility Model Content

[0007] To overcome the problems existing in the related technologies, this application provides a range extender that improves reliability and reduces fuel consumption, including: an engine, a generator, and a front-end wheel system;

[0008] The generator and the front-end gear train are respectively disposed at both ends of the crankshaft of the engine in the axial direction; one end of the crankshaft is driven to the rotor of the generator, and the other end of the crankshaft is driven to the front-end gear train;

[0009] The front-end gear train is equipped with a transmission wheel set and a crankshaft position sensor. One of the pulleys of the transmission wheel set is equipped with a signal gear ring, and the crankshaft position sensor is arranged radially along one side of the signal gear ring.

[0010] In one embodiment, the front-end pulley system includes a crankshaft pulley, a water pump pulley, and a drive belt; the crankshaft pulley is fixedly connected to the crankshaft along the axial direction, and the drive belt drivesly connects the water pump pulley and the crankshaft pulley.

[0011] In one embodiment, the signal gear ring is disposed on the crankshaft pulley circumferentially along the crankshaft pulley.

[0012] In one embodiment, a shock-absorbing wheel is further provided between the crankshaft pulley and the crankshaft.

[0013] In one embodiment, the engine is equipped with a water-cooled turbocharger;

[0014] The water-cooled turbocharger includes a pressurized end and an intermediate body; the intermediate body is provided with a cooling channel for circulating coolant to dissipate heat.

[0015] In one embodiment, the engine cylinder is provided with a valved cooling spray nozzle.

[0016] The oil injection port of the valved cooling spray hook faces the moving pair inside the cylinder.

[0017] In one embodiment, the compression ratio of the engine cylinders is 20:1.

[0018] A second aspect of this application provides a range-extended vehicle, including the range extender described in any one of the first aspects of this application, which improves reliability and reduces fuel consumption.

[0019] The technical solution provided in this application may include the following beneficial effects:

[0020] In this application, the crankshaft position sensor is moved from the original flywheel housing to the front-end gear train structure. A signal gear ring is installed on any one of the pulleys in the front gear train's drivetrain, and the crankshaft position sensor is aligned with this signal gear ring to detect the crankshaft rotation status. By eliminating the flywheel housing structure and combining the signal gear ring with the front-end gear train, this application avoids the problem of the crankshaft position sensor being interfered with by the generator while maintaining the original axial length.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0022] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0023] Figure 1 This is a perspective view of the range extender shown in the embodiment of this application;

[0024] Figure 2 for Figure 1A three-dimensional view of the range extender from another perspective;

[0025] Figure 3 This is a cross-sectional view of the cylinder of an engine shown in an embodiment of this application;

[0026] Attached diagram labels: 1. Engine; 10. Cylinder; 11. Cooling spray hook with valve; 2. Generator; 3. Front-end gear train; 30. Transmission pulley set; 31. Crankshaft position sensor; 300. Crankshaft pulley; 301. Signal gear ring. Detailed Implementation

[0027] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0028] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0029] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] Example 1

[0031] In highly integrated range extenders, existing designs combine the crankshaft flywheel and generator rotor, removing the traditional engine flywheel housing, thereby reducing the axial length between the generator and the engine.

[0032] The aforementioned range extender structure also presents a technical problem where the crankshaft position sensor can be subject to electromagnetic interference from nearby generators.

[0033] To prevent electromagnetic interference to the crankshaft position sensor caused by the proximity of the generator and engine, embodiments of this application provide a range extender that improves reliability and reduces fuel consumption, such as... Figure 1 As shown, it includes: engine 1, generator 2 and front wheel system 3.

[0034] Specifically, the generator 2 and the front-end gear train 3 are respectively located at opposite ends of the crankshaft of the engine 1 along its axial direction. One end of the crankshaft is driven to the rotor of the generator 2, and the other end of the crankshaft is driven to the front-end gear train 3.

[0035] Furthermore, the front-end gear train 3 is provided with a transmission gear set 30 and a crankshaft position sensor 31. One of the pulleys of the transmission gear set 30 is provided with a signal gear ring 301, and the crankshaft position sensor 31 is arranged radially along one side of the signal gear ring 301.

[0036] In this embodiment, the crankshaft position sensor 31 is moved from the original flywheel housing side to the structure of the front gear train 3. A signal gear ring 301 is provided on any one of the pulleys in the transmission wheel set 30 of the front gear train, and the crankshaft position sensor 31 is aligned with the signal gear ring 301 to detect the crankshaft rotation status. This embodiment, by eliminating the flywheel housing structure, combines the signal gear ring 301 with the front gear train 3, thereby maintaining the original axial length while avoiding interference from the generator 2 to the crankshaft position sensor 31.

[0037] Example 2

[0038] To further illustrate the front-end wheel train structure of the range extender in Embodiment 1, this application also provides a range extender that improves reliability and reduces fuel consumption, based on Embodiment 1, such as... Figure 1 As shown, it includes an engine 1, a generator 2, and a front wheel system 3.

[0039] Specifically, such as Figure 2 As shown, the front-end gear train 3 includes a crankshaft pulley 300, a water pump pulley, and a drive belt. The crankshaft pulley 300 is axially fixedly connected to the crankshaft, and the drive belt drivesly connects the water pump pulley and the crankshaft pulley 300.

[0040] For example, the signal gear ring 301 is disposed on the crankshaft pulley 300 along the circumference of the crankshaft pulley 300.

[0041] It is understood that the signal gear ring 301 in the embodiments of this application can be set in any transmission wheel of the front end gear train 3, such as idler wheel, tensioner wheel, etc.

[0042] To prevent vibration of the front wheel system from reducing the accuracy of the crankshaft position sensor 31, a shock-absorbing wheel is further provided between the crankshaft pulley 300 and the crankshaft.

[0043] To improve the durability of the range extender, the engine 1 in this embodiment is further provided with a water-cooled turbocharger. Specifically, the water-cooled turbocharger includes a pressure end and an intermediate body. The intermediate body is provided with cooling channels for circulating coolant to dissipate heat.

[0044] Furthermore, such as Figure 3 As shown, a valved cooling spray nozzle 11 is provided inside the cylinder 10 of the engine 1, with the spray port of the valved cooling spray nozzle 11 facing the moving part inside the cylinder 10. Furthermore, the compression ratio of the cylinder 10 of the engine 1 is 20:1. The cylinder 10 of the engine 1 in the range extender of this embodiment can improve fuel economy and durability through the above-described structural improvements.

[0045] Example 3

[0046] A range-extended vehicle includes a range extender as described in Embodiment 1 or Embodiment 2, which improves reliability and reduces fuel consumption.

[0047] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A range extender that improves reliability and reduces fuel consumption, characterized in that, include: Engine (1), generator (2) and front wheel system (3); The generator (2) and the front gear train (3) are respectively located at both ends of the crankshaft of the engine (1) along the axial direction; one end of the crankshaft is connected to the rotor of the generator (2) and the other end of the crankshaft is connected to the front gear train (3); The front-end gear train (3) is provided with a transmission gear set (30) and a crankshaft position sensor (31). One of the pulleys of the transmission gear set (30) is provided with a signal gear ring (301). The crankshaft position sensor (31) is arranged radially along the signal gear ring (301) on one side of the signal gear ring (301).

2. The range extender with improved reliability and reduced fuel consumption according to claim 1, characterized in that, The front-end gear train (3) includes a crankshaft pulley (300), a water pump pulley, and a transmission belt; the crankshaft pulley (300) is fixedly connected to the crankshaft along the axial direction, and the transmission belt drives the water pump pulley and the crankshaft pulley (300).

3. The range extender with improved reliability and reduced fuel consumption according to claim 2, characterized in that, The signal gear ring (301) is arranged circumferentially on the crankshaft pulley (300).

4. The range extender with improved reliability and reduced fuel consumption according to claim 3, characterized in that, A shock-absorbing wheel is also provided between the crankshaft pulley (300) and the crankshaft.

5. A range extender with improved reliability and reduced fuel consumption according to claim 1, characterized in that, The engine (1) is equipped with a water-cooled turbocharger; The water-cooled turbocharger includes a pressurized end and an intermediate body; the intermediate body is provided with a cooling channel for circulating coolant to dissipate heat.

6. The range extender with improved reliability and reduced fuel consumption according to claim 1, characterized in that, The cylinder (10) of the engine (1) is equipped with a valved cooling spray hook (11); The oil injection port of the valved cooling spray hook (11) faces the moving pair inside the cylinder (10).

7. The range extender with improved reliability and reduced fuel consumption according to claim 1, characterized in that, The compression ratio of the cylinder (10) of the engine (1) is 20:

1.

8. A range-extended vehicle, characterized in that, The range extender includes the improved reliability and reduced fuel consumption as described in any one of claims 1 to 7.

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