JPH0221299Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention automatically controls the speed change by an electronic control unit such as a microcomputer that receives the selection signal of the speed change pattern selection switch and the detection signal of the sensor. The present invention relates to an operating state display device for an electronically controlled automatic transmission for automobiles.

[Problems that conventional technology and ideas try to solve]

Conventional display devices of this type display which shift pattern the driver has selected. For example, on the display screen shown in FIG. 4, the display position corresponding to the selected position of the shift pattern selection switch was lit. In other words, when "L" lights up, 1
"2" means automatic transmission between 1st and 2nd speeds, "D" means automatic transmission between 1st and 3rd speeds or overdrive, "N" means neutral gear position, "R" ” indicates the selection of the gear reverse position and “P” indicates the selection of the gear parking position. Therefore, it is difficult to tell which gear position the automobile is in during automatic gear shifting, or whether the gear is actually being automatically shifted, which may cause a sense of anxiety for the driver.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an operating state display device for an electronically controlled automatic transmission of an automobile, which allows the user to more reliably grasp the operating state of the automatic transmission.

[Means and actions for solving problems]

In order to achieve this objective, the present invention includes a display control circuit attached to the display device that converts control signals instructing gear position and lockup into display signals,
At least what gear position the vehicle is running in, such as 1st to 3rd gear or overdrive, and whether or not the lock-up is operating at each gear position are displayed.

[Example of idea]

In FIG. 1, as is well known, numeral 1 outputs a control signal to the transmission by performing calculations based on various sensor detection signals in response to a selection signal corresponding to the selection position of the transmission pattern selection switch by the driver. It is a microcomputer that sends out data. In order to facilitate checking, this microcomputer is equipped with an operation check terminal 1a which outputs an analog voltage whose level changes in response to a control signal, as shown in FIG.

Reference numeral 10 designates a display control circuit utilizing this well-known operation check terminal 1a, and is comprised of an A/D converter 11 for digitizing the analog voltage, and OR gates 12-15. 20
This is a display device that has a display surface on which the characters shown in FIG. 3 are drawn, and is equipped with associated light emitting diodes 21 to 25 for lighting up the characters, respectively.

The operation is as follows.

When the microcomputer 1 is outputting the 1st speed control signal, the A/D converter 11 has
OV is input, and an output voltage of a predetermined level is generated at its "O" terminal. As a result, the light emitting diode 21 lights up and "1" on the display surface of the display device 20 (FIG. 3) is illuminated. When the second speed control signal is issued, 2V is input, an output voltage of a predetermined level is generated at the "2" terminal, and the light emitting diode 22 is turned on through the OR gate 12, so that "2" is illuminated. In the lock-up state of the second speed, 3V is input, an output voltage is generated at the "3" terminal, and the light emitting diodes 22 and 25 are lit through the OR gates 12 and 15, so that "2" and "L/U" are illuminated. When the driver selects overdrive 0/D and actually reaches the overdrive gear position, "0/D" is selected in the same way.
is illuminated and further locked up,
"L/U" is also illuminated.

Incidentally, the display control circuit may be configured to receive a digital or analog control signal itself other than the operation check terminal of the microcomputer, and the display may display a symbol instead of simply lighting. Furthermore, it is also possible to display "N", "R" and "P" in FIG. 4 together on the display.

[Effect of idea]

As described above, according to the present invention, it is possible to confirm not only the shift pattern itself selected by the driver, but also the actual gear state during driving in response to the shift pattern, thereby making it possible to drive the vehicle in accordance with a manual vehicle. Furthermore, it becomes easier to detect abnormalities in automatic shift control.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of an operating state display device for an electronically controlled automatic transmission of a vehicle according to an embodiment of the present invention, and FIG. 2 is an explanation of the output voltage of a microcomputer that becomes an input signal to the A/D converter. figure,
FIG. 3 is an explanatory diagram of the display surface, and FIG. 4 is an explanatory diagram of the conventional display surface.

Claims (1)

[Scope of utility model registration request] Operating state of an electronically controlled automatic transmission of an automobile that automatically shifts gears by sending a control signal to the transmission from an electronic control unit that receives a selection signal from a shift pattern selection switch and a detection signal from a sensor. The display device is equipped with a display control circuit that converts the control signal for commanding the gear position and lock-up into a display signal, so that the display device displays at least the gear position during traveling and the presence or absence of lock-up operation. An operating status display device characterized by: