JP2514570Y2 - Flywheel controller for twin roller chassis dynamometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to a flywheel control device in a twin roller chassis dynamometer.

B. Overview of the Invention This invention is a flywheel control device inside a free roller in a twin-roller chassis dynamometer. By providing a flywheel via a clutch to the shaft that connects the free rollers, the weight of the flywheel can be significantly reduced, and vehicles with various vehicle weights can be tested. .

C. Conventional technology Chassis dynamometers used for vehicle performance tests (running resistance, climbing slopes, vehicle weight, etc.) can easily perform experiments equivalent to running on a real road indoors with good reproducibility. It is widely used for testing exhaust gas characteristics and fuel consumption characteristics. However, in using it, there are many items that must be controlled, including the inertial amount of the vehicle weight. Therefore, if this control is inappropriate, a satisfactory simulation cannot be performed. Inertial simulation is one of the factors. To simulate this inertia, a flywheel (FW) was connected to the chassis dynamometer roller.

D. Problems to be solved by the invention In recent years, a chassis dynamometer called a twin roller type has been used for a chassis dynamometer. This twin-roller chassis dynamometer is one in which the wheels of the test vehicle are placed between two rollers, one roller is connected to the dynamometer, and the FW is connected to the other roller, especially the latter. This roller is called a free roller. Among such chassis dynamometers, it has become possible to store the FW in a free roller to which the FW is connected.

However, if the FW is housed in the free roller at a rotation ratio of 1: 1, the diameter of the FW is large and the weight is heavy. Therefore, the diameter of the free roller must be increased. However, since there is a limit to increase the diameter of the free roller, there is a problem that the diameter cannot be increased so much. Also,
Since the FW, which is heavy in weight, is stored in the free roller, bending, vibration, and
There is also a problem that noise cannot be reduced.

The present invention has been made in view of the above circumstances, and it is possible to significantly reduce the weight of the flywheel, reduce the generation of noise, etc., and to support vehicle tests of various vehicle weights. It is an object of the present invention to provide a flywheel control device for a twin roller chassis dynamometer.

E. Means for Solving the Problems This invention is to connect a roller dynamometer and a load roller, and to provide a pair of free rollers corresponding to the roller dynamometer and the load roller, respectively. A flywheel is provided through a clutch on a shaft for connecting a free roller and a shaft for connecting a free roller, and a transmission device is provided for a connecting shaft for the roller dynamometer and the load roller and a connecting shaft for the free roller. .

F. Action The flywheel in the free roller and the flywheel between the free rollers are controlled via the transmission device so as to be accelerated by the rotation speed of the roller dynamometer. For example, if the flywheel speed is doubled, the weight of the flywheel will be 1/4. Therefore, the inertia amount can be finely adjusted by adding the flywheel according to the weight of various vehicles. While various vehicle tests can be done.

G. Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of a twin roller chassis dynamometer in which a roller dynamometer, a load roller and a pair of free rollers are provided at regular intervals in the front-rear direction. 11b is a roller dynamometer and a load roller, and 12a and 12b are a pair of free rollers. The wheels of the test vehicle are mounted between the roller dynamometer 11a and the free roller 12a and between the load roller 11b and the free roller 12b. The roller dynamometer and the load rollers 11a and 11b are supported by bearings 13a and 13b and 14a and 14b, and the rotation axis of the roller dynamometer 11a and the rotation axis of the load roller 11b are connected by a shaft 15. This axis 1
When connecting by 5, couplings 16 and 17 are provided and connected. A bearing 18, a pulley 19 for applying a timing belt described later, and a brake 20 are provided on the shaft between the coupling 17 and the rotating shaft of the load roller 11 b.

The free rollers 12a, 12b are supported by bearings 21a, 21b and 22a, 22b, and the flywheel mounting rotary shafts 23, 37 inserted through the free rollers 12a, 12b are connected as shown below. It 23 is the rotation axis of the flywheel 38,
The rotary shaft 23 is connected to one rotary shaft 26 of a flywheel 25 of 250 kg, for example, via a first clutch 24. 27 is a bearing.

The other rotating shaft of the flywheel 25 is connected to a shaft 29 via a second clutch 28. The shaft 29 is connected via a third clutch 30 to one rotary shaft of a flywheel 31 of, for example, 125 kg. The other rotating shaft 32 of the flywheel 31 is supported by a bearing 33 and is connected to the fourth clutch 34. 35 is the rotating shaft 32
A timing belt 36 is stretched between the pulley 35 and the pulley 19 attached to the pulley. The pulleys 19 and 35 and the timing belt 36 are transmissions for increasing the speed of the flywheel. A rotary shaft 37 of a flywheel 39 is connected to the fourth clutch 34. In the free rollers 12a, 12b, the flywheel 38,
39 are stored. Flywheel 38, 39 each 1
Use 000kg and 500kg. 46a, 46b and 47a, 47b are bearings for the rotary shafts 23 and 37 of the flywheels 38 and 39.

Although not shown, the roller dynamometer 11a is provided with a stator core at the center and a rotor core on the outer periphery of the stator core. The rotor core is a roller body 4 that constitutes the roller dynamometer 11a.
Attached to the inner peripheral surface of 0 The stator core is supported by swing bearings 41 and 42 provided inside the roller body 40. 43 is a frame that constitutes a room for housing the chassis dynamometer, and 44 and 45 are bearing bases. Although not shown, the roller dynamometer is designed to be driven by a control signal from the outside, and the obtained measurement data is also displayed on a measuring instrument (not shown).

Next, the operation of the embodiment configured as described above will be described. In a normal vehicle test, the first to fourth clutches 2
Cut 4,28,30,34. As a result, the vehicle weight is adjusted in a state of the minimum inertia in which only the roller dynamometer 11a, the load roller 11b, and the free rollers 12a and 12b rotate (the flywheels are not all connected or are not rotating). At this time, if the inertial amount with respect to the vehicle weight is insufficient, in order to compensate for the insufficient inertial amount, the
Inertia of flywheels 25 and 31 by connecting the first and second clutches 24 and 28, the clutches of the third and fourth clutches 30 and 34, or all the clutches of the first to fourth clutches 24, 28, 30, and 34. If it is added to, it becomes possible to carry out a test with an inertial amount extremely close to the vehicle weight.

Further, even when the flywheels 25 and 31 are added, the rotation of the roller dynamometer 11a is transmitted to the flywheels 25, 31, 38, 39 via the timing belt 36. When set to 2: 1, the pulley 35 will rotate about twice as fast as the pulley 19. Therefore, the flywheel 25,31,38,39
Is 1/4 because of the principle that is inversely proportional to the square of the speed increasing ratio. From this result, there is no problem even if the weight of the flywheel is increased so that the vehicle weight of various vehicles can be finely adjusted. Since the flywheel is provided on the shaft connecting the free rollers 12a and 12b, the installation space is not expanded.

H. Effect of the Invention As described above, according to the present invention, in addition to the flywheel provided with the free roller, the flywheel for fine adjustment of the inertial amount is provided between the free rollers by the clutch,
Since the fine adjustment flywheel is installed, it becomes possible to support the vehicle weight of various vehicles, and the advantage of reducing the weight of the flywheel and suppressing the generation of noise is is there.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of this invention. 11a: Roller dynamometer, 11b: Road roller,
12a, 12b …… Free roller, 24,28,30,34 …… First to fourth
Clutch, 27,31,38,39 …… Flywheel, 19,35 ……
Pulley, 36 …… Timing belt.

Claims (1)

(57) [Scope of utility model registration request] 1. A roller dynamometer and a load roller are connected to each other, and a pair of free rollers are provided corresponding to the roller dynamometer and the load roller. A flywheel is provided in the free roller and a free roller is provided. A flywheel control device for a twin roller chassis dynamometer, characterized in that a flywheel is provided on a connecting shaft via a clutch, and a transmission device is provided on a connecting shaft of the roller dynamometer and the load roller and a connecting shaft of the free roller. .