JP3173883B2 - Diesel vehicle with anti-slip function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diesel vehicle having an idling prevention function.

[0002]

2. Description of the Related Art Conventionally, power transmission is performed via a torque converter (liquid transmission) in a railway diesel vehicle. This is because according to the torque converter, the torque particularly in the low-speed range is enhanced, which is advantageous for enhancing the starting acceleration performance of the vehicle. However, in the above-described conventional diesel vehicles, the wheels may slip due to excessive driving torque. Then, once idling occurs, there is a problem that slip between the wheel and the rail increases, adhesion decreases, and idling diverges. As a method of suppressing the divergence of the slip, there is known a method of reducing the rotational force of the wheel according to the state of the generated slip. That is, in the electric vehicle, the current flowing to the main motor is gradually reduced, and in the diesel vehicle, the fuel injection amount is gradually reduced. When the idling condition is large, the rate of the gradual decrease is set to be large, and when the idling condition is small, the ratio is set to be small.

[0003]

However, in this method, the decreasing rate of the wheel rotational force in accordance with the idling condition is usually set to a constant value in advance, and therefore, an appropriate anti-skid effect can always be obtained. Often not. Since the adhesion between the rails and the wheels varies in a variety of ways, it is not possible to obtain an appropriate anti-spinning effect by always performing a constant torque reduction control in accordance with the idling situation. In order to solve such a problem, a method of introducing the concept of learning control and gradually reducing the wheel rotational force to an optimum value may be considered. However, the anti-slip control needs to be performed in a very short time, and it is difficult to introduce the learning control within such a short time to detect the optimum value.

The present invention has been made in view of the above-mentioned problems, and has an extremely simple configuration, but has an idling prevention function capable of converging generated idling in a short time or suppressing idling to a minute range. An object of the present invention is to provide a diesel vehicle provided with the above.

[0005]

In order to achieve the above object, in a diesel vehicle having an anti-spin function according to the present invention, a diesel engine controlled by an engine governor having the function of a full speed governor is provided. In a diesel vehicle that drives a driving shaft via a torque converter, the vehicle includes an idling detection unit that detects idling of the driving shaft, and a speed detection unit that detects a traveling speed of the vehicle from the rotation speed of a slave shaft, Rotation speed command means for instructing the engine speed governor a constant speed determined according to the traveling speed of the vehicle when idling of the driving shaft is detected; and a full speed governor. Diesel engine controlled by an engine governor that can switch both the top and bottom governor functions, detects idle running of the driving shaft in a diesel vehicle that drives the driving shaft via a torque converter Idling detection means, speed detection means for detecting the running speed of the vehicle from the rotation speed of the slave shaft, and a constant rotation speed determined according to the running speed of the vehicle when idling of the drive shaft is detected. Rotation speed commanding means for instructing the engine governor, wherein the function is switched to a full speed governor during idling detection by the idling detecting means.

[0006]

In the diesel vehicle having the anti-spin function of the present invention having the above configuration, the anti-skid detecting means detects the slip of the running wheel. When idling is detected, the rotational speed of the diesel engine is maintained at a constant value. Then, an optimum rotation speed according to the traveling speed of the vehicle is selected as the rotation speed. Here, if idling of the driving shaft is about to diverge, the speed ratio of the torque converter (the rotation speed ratio between the input shaft and the output shaft) increases,
The torque is transmitted to the output shaft, and the rotational torque rapidly decreases. As a result, the idling quickly converges or is suppressed to a minute range.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a diesel vehicle having an anti-spin function according to the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a block diagram showing the configuration of the embodiment. As shown in the figure, in this vehicle, a diesel engine 1 drives a drive shaft 3 via a torque converter 2, and the diesel engine 1 is controlled by a control command 5 from an engine governor 4.
Here, the engine governor 4 is a full-speed, maximum-minimum dual-purpose electronic type having both the function of the full-speed governor and the function of the maximum / minimum governor. Will be In the full speed governor mode, the rotational speed of the diesel engine 1 is held at the rotational speed indicated by the rotational speed command information 7, while in the maximum and minimum governor modes, the fuel injection from the master controller 8 is performed. The output of the diesel engine 1 is controlled by the injection amount according to the amount command 9. Then, during normal operation, the mode is set to the maximum and minimum governor, and the crew operates the master controller 8 to control the vehicle speed.

Next, a moving shaft generator 10 is provided on the moving shaft 3 so as to detect the number of rotations of the driving wheels. Similarly, a slave shaft generator (not shown) is provided with a slave shaft generator 11,
The rotation speed of a driven wheel (slave shaft) is detected. Then, the rotation speeds of both are respectively set in the dynamic shaft speed information 12.
The vehicle speed information 13 is input to the slip detection device 14. The slip detection device 14 determines that slip occurs when the difference between the two pieces of speed information exceeds a predetermined value. At this time, the idling detection device 14 switches the mode switching command 6 from the maximum and minimum speed control function to the full speed control function, and outputs an operation command 15 to the rotation speed command device 16. The rotation speed command device 16 has a built-in map for selecting an optimum engine rotation speed according to the running speed of the vehicle. To output the rotation speed command information 7. As described above, when idling of the driving shaft is detected, the rotation speed of the diesel engine 1 is maintained at a constant rotation speed determined according to the traveling speed of the vehicle. FIG. 2 is a graph showing the characteristics of the torque converter 2 used in the present embodiment, and shows the relationship between the speed ratio and the transmission torque under the condition that the input shaft is maintained at a constant rotation speed. As is apparent from the figure, when the rotation speed of the output shaft increases while the rotation speed of the input shaft of the torque converter is kept constant, the torque transmitted to the output shaft sharply decreases. That is, if the rotational speed of the diesel engine 1 is maintained at a constant value, the speed ratio of the torque converter 2 increases and the rotational torque transmitted to the dynamic shaft 3 rapidly decreases even if the idling of the dynamic shaft 3 tries to diverge. As a result, the slip is quickly converged or suppressed to a very small range.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the control of the diesel engine 1 is controlled by the fuel injection amount during normal operation, and the rotation speed is controlled only when idling occurs. However, the present invention can be applied to a torque converter that performs speed control under all operating conditions in the same manner. In addition, the idling detection means may determine that idling has occurred when the temporal change in the rotation speed of the driving shaft 3 exceeds a predetermined value.

[0010]

As described above, according to the diesel vehicle provided with the anti-skid function of the present invention, the speed of the diesel engine 1 is maintained at a constant speed when the slip of the driving shaft is detected. In spite of the extremely simple configuration, the generated idling can be converged in a short time, or the idling can be suppressed to a minute range.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a diesel vehicle having an anti-spin function according to the present invention.

FIG. 2 is a graph showing a relationship between a speed ratio of a torque converter and a transmission torque.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Diesel engine 9 ... Fuel injection amount command 2 ... Torque converter 10 ... Driving shaft generator 3 ... Driving shaft 11 ... Slave shaft generator 4 ... Engine speed control Machine 12 ... Driving axis speed information 5 ... Control command 13 ... Vehicle speed information 6 ... Mode switching command 14 ... Spin detector 7 ... Rotation speed command information 15 ... Operation command 8 Master controller 16 Rotation speed command device

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-61-123848 (JP, A) JP-A-5-116562 (JP, A) JP-A-3-200469 (JP, A) JP-A-61-123 106932 (JP, A) JP-A-4-60122 (JP, A) JP-A-64-67470 (JP, A) JP-A-3-203508 (JP, A) (58) Fields investigated (Int. ⁷ , DB name) F02D 29/00-29/06 F02D 41/00-45/00 395 F02D 1/00-1/18 B61C 15/12

Claims (2)

(57) [Claims] In a diesel vehicle in which a diesel engine controlled by an engine governor having the function of a full-speed governor drives a dynamic shaft via a torque converter, an idling detection for detecting idling of the dynamic shaft is provided. Means, and speed detection means for detecting the running speed of the vehicle from the rotation speed of the slave shaft, and when the idling of the driving shaft is detected, the constant rotation speed determined according to the running speed of the vehicle, A diesel vehicle having an idling prevention function, comprising: a rotation speed command means for commanding an engine governor. 2. A diesel vehicle in which a diesel engine controlled by an engine governor having both functions of a full-speed governor and a maximum / minimum governor so as to be freely switchable drives a driving shaft via a torque converter. In, idle detection means for detecting the idling of the driving shaft, speed detection means for detecting the running speed of the vehicle from the rotation speed of the slave shaft, and according to the running speed of the vehicle when the idling of the driving shaft is detected A rotational speed commanding means for instructing the engine governor at a predetermined constant rotational speed, wherein the function is switched to a full speed governor during idling detection by the idling detecting means. Diesel vehicle with anti-slip function.