JPH0442601Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention compares detection signals from an engine rotation speed detection means, a vehicle speed detection means, and a selector with a shift map stored in a control unit to determine whether shift change conditions are satisfied. When the shift change is performed based on the judgment result that the shift change condition is satisfied, and the shift change is performed by specifying the shift stage using the selector with the map rewrite button on the control unit turned on. This invention relates to an improvement in an automatic transmission for a vehicle, which is equipped with a learning circuit that reads the vehicle speed at the time of upshifting into a memory and rewrites a map.

[Prior art]

As an automatic system that achieves both easy drive and fuel efficiency, the conventional mechanical clutch and transmission are combined with sensors such as an engine rotation speed detection means, i.e., an engine rotation sensor, and a vehicle speed detection means, i.e., a vehicle speed sensor, to operate the clutch and transmission. A mechanical automatic system is known in which an actuator is added and these are electronically controlled by a control unit. Furthermore, a semi-automatic system is also known in which only the clutch operation at the time of starting is performed manually, and all other gear shifting operations are performed automatically. With this system, to change gears while driving, the driver simply specifies the desired range using the selector lever, and all subsequent clutch and transmission operations are controlled optimally by electronic control. Additionally, when auto range is specified, the system also has the function of sequentially upshifting according to a pre-stored map as the vehicle speed increases. Furthermore, the present applicant has developed an automatic transmission device for a vehicle that is equipped with a learning circuit that reads the vehicle speed at the time of upshifting into memory and rewrites the map when the map rewriting button is turned on and the shift stage is designated by the selector and the shift up is performed. However, with this device, when rewriting the map, for example, in the case of a 6-speed transmission, the shift up from the start to the 6th gear is not completed all at once.
If you stop shifting up by shifting to neutral or downshifting midway through, press the map rewrite button when you reach the remaining gears again after restarting.
There is the hassle of turning it on and rewriting, and in Japan's road traffic conditions, where cars cut in from the side, children jump out, and traffic lights change quickly, there are roads where the front is empty and there are no traffic lights. Otherwise, there is a problem in that it is difficult to complete the rewriting of the map.

[Purpose of invention]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an automatic transmission device for a vehicle that can easily perform map rewriting control without being affected by road traffic conditions.

[Structure of the idea]

According to the present invention, the detection signals from the engine speed detection means, the vehicle speed detection means and the selector are compared with a shift map stored in the control unit to determine whether shift change conditions are satisfied.
A shift change is performed based on the judgment result that the shift change conditions are satisfied, and when a shift change is performed by specifying a shift stage using the selector with the map rewrite button turned on in the control unit, the vehicle speed at the time of shift up is stored in memory. In an automatic transmission for a vehicle equipped with a learning circuit that reads and rewrites the map, the control unit has a control unit that specifies a shift gear after a shift change that is higher than the previous gear and that the selector specifies the shift gear within a specified time from the previous gear. The map is rewritten only when the map is rewritten, and even if the next shift up to the same shift stage is performed, the map is not rewritten, and when all shift stages have been rewritten, this is displayed and the rewriting is completed. A map rewriting determination circuit is provided.

[Function and effect of the idea]

Therefore, even if you shift up all at once from the start to the highest gear, and then change it to neutral or downshift to stop the upshifting, the map for the remaining shift gears can be automatically rewritten the next time you accelerate again. Turn on map rewrite button
To easily perform map rewriting control without being affected by road traffic conditions without having to take the trouble of

[Preferred embodiment]

When implementing the present invention, a map rewriting indicator lamp is installed on the transmission position indicator that displays the transmission position.
It is preferable that the light be turned on when the map rewrite button is turned ON, and turned off when the map rewrite is completed.Also, write status display lamps should be provided opposite to each shift stage of the transmission position indicator, and the rewrite shift selector should be provided. It is preferable to provide a gear designation button and rewrite the writing status display lamp so that, in response to the shift gear designation button, the shift gears that do not require writing are lit and the shift gears that have been written are lit. Preferably, it is seconds.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a hardware configuration diagram and a control block diagram of a diesel engine equipped with an automatic transmission device embodying the present invention. In FIG. 1, a transmission 30 is attached to an engine 10 via a mechanical clutch 20, and its output shaft is connected via a propeller shaft 35 to a rear axle (not shown).

The engine 10 is provided with a fuel injection pump 12 equipped with an electronic governor 11 and an engine rotation sensor 13.

The clutch 20 includes a clutch actuator 21 that engages and disengages the clutch, and a clutch stroke sensor 22 that detects the stroke amount of the clutch.
is provided.

The transmission 30 includes a transmission actuator 31 that shifts the transmission, a shift position sensor 32 provided inside the transmission actuator 32 that detects the shift position, and a vehicle speed sensor that detects the rotational speed of the output shaft. 33, and a countershaft rotation sensor 34 that detects the rotational speed Ng of the countershaft.

Reference numeral 40 is a selector provided in the driver's cab for specifying the shift stage when changing the shift.The shift lever 40a can select each shift stage of reverse R, six shift stages from 1st to 6th gear, and neutral N. It is equipped with a switch corresponding to each shift stage. 41 is a map rewrite button that specifies map rewriting, 42 is a rewrite shift stage designation button that specifies the shift stage to be rewritten, 43
44 is an accelerator pedal, 45 is an accelerator switching device, 45a is a transmission display that displays the transmission position, and 46 is a map that displays when the map is being rewritten. A rewriting indicator lamp 47 indicates a shift stage that is not to be rewritten and a writing status display lamp that displays a rewritten shift stage, and 48 a selector error lamp that displays a selector error.

In FIG. 2, a control unit 50 compares signals from a selector 40, engine rotation sensor 13, vehicle speed sensor 33, and shift position sensor 32 with a shift map and outputs a shift change command when shift change conditions are satisfied. In addition, a shift change control circuit 51 lights up the selector error lamp 48 when an error occurs in the selector 40, and a signal from the shift position sensor 32 when a shift change command is output from the shift change control circuit 51. Synchronization judgment that calculates the synchronization speed NSYC at the shift stage specified by the input from the vehicle speed sensor 33 based on the above, and compares the calculated value with the rotation speed Ng from the countershaft rotation sensor 34 to determine the synchronization state. 52, a transmission control circuit 53 that outputs a control command to the transmission actuator 31 based on the synchronization determination signal from the synchronization determination unit 52, and a clutch actuator based on the command from the shift change control unit 51. Clutch control circuit 5 outputting control commands to 21
4, an accelerator control circuit 55 that outputs an accelerator switching designation to the accelerator switching device 45 based on a command from the shift change control unit 51 to switch the accelerator operation from manual to automatic, and a selector with the map rewrite button 41 turned on. A learning circuit 56 reads the vehicle speed at the time of shift up into the memory and rewrites the map when the shift step is specified by 40 and the map is rewritten, and a map rewriting indicator lamp 4 is activated when the map rewrite button 41 is turned on.
7, determines the shift stage that does not require rewriting based on the signal from the rewriting shift stage designation button 42, and lights up the writing status display lamp 47 of the shift stage,
Only when the shift gear after the shift change is specified by the selector 40 within a specified time, e.g. 2 seconds, from the previous shift gear, the map is rewritten and the writing status display lamp 46 for that shift gear is displayed. The map is not rewritten even if the next shift is performed to the same shift stage, that is, the shift stage where the writing status display lamp 46 is lit, and the map is rewritten when all shift stages have been rewritten. A map rewriting determination circuit 57 that turns off the middle indicator lamp 46 to indicate completion of writing.
are provided, each part 51, 52, each circuit 53-5
Control signals are exchanged between the terminals 7 and 7. Note that the map rewriting determination circuit 57 includes:
A clock section 57a is provided.

Next, the operation of the present invention will be explained mainly with reference to FIGS. 3 and 4.

FIG. 3 shows the basic flow of map rewriting. When the map rewriting button 41 is turned on, the map rewriting determination circuit 57 activates the map rewriting indicator lamp 4.
6 is turned on (step S1).

In FIG. 4, it is determined whether the selector 40 is in reverse R (step S1), and if YES, the shift change control section 51 specifies reverse and the transmission control circuit 53 outputs the reverse to the transmission actuator 31. Outputs the control command, sets the reverse gear, and ends the control (Step S)
2). If NO in step S1, selector 4
Determine whether 0 is neutral N (step S
3) If YES, map rewriting determination circuit 57
The clock section 57a of the transmission controller 57a starts a time count (step S4), then the shift change control section 51 specifies neutral, and the transmission control circuit 53 controls the transmission actuator 3.
1, a control command is output, the control is set to neutral, and the control ends (step S5). NO at step S3
In this case, it is determined whether the auto button 43 is ON or not (step S6), and if YES, the shift change control section 53 is activated based on the signal from the vehicle speed sensor 33.
reads the shift map (step S7), and determines whether or not a shift is necessary based on the signal from the shift position sensor 32 (step S8); if NO, the control ends; if YES, determines whether to shift up or not. (step S9), and if YES, perform shift up control (step S10).
If NO, shift down control is performed and the control ends (step S11). If NO in step S6, it is determined whether the selector 40 is in 1st or 6th gear (step S12), and if NO, the selector error lamp 48 is turned on (step S13).
If YES, that is, if one of the 1st to 6th speeds is specified, the timer 57a stops the time count and stores the elapsed time from the start of counting in step S4 in the memory (step S4).
14) Determine whether or not a shift is necessary based on the signal from the shift position sensor 32 (step S1).
5). If NO, the control ends, and if YES, the vehicle speed data from the vehicle speed sensor 33 at that time is read into the memory of the map rewrite determination circuit 57 (step S16), and then the synchronization determination unit 52 determines whether or not it is a shift up. (Step S1
7). If YES, that is synchro rotation speed
If NSYC≦countershaft rotational speed Ng, shift up control is performed (step S18),
If NO, that is, if synchro rotation speed NSYC>counter shaft rotation speed Ng, downshift control is performed (step S19). Next, the map rewriting judgment circuit 57 turns on the map rewriting lamp 46.
is lit (step S2).
0), if NO, control ends; if YES,
Determine whether the writing status display lamp 47 of the shift stage is lit (step S21);
If YES, the control ends; if NO, it is determined whether the elapsed time from step S4 to step S14 stored in the memory in step S14 is within a specified time, that is, 2 seconds (step S22).
If NO, the control ends; if YES, the current shift gear is compared with the previous shift gear to determine whether it corresponds to a shift up (step S23).
If NO, the control ends, and if YES, the map is rewritten (step S24), and the writing status display lamp 47 of the shift stage concerned is turned on (step S25). Finally, the map rewriting determination circuit 57 determines whether rewriting of all shift stages has been completed, that is, whether all writing status display lamps 47 are lit (step S26).
If NO, the control ends; if YES, the map rewriting indicator lamp 46 is turned off and the control ends (step S27).

〔summary〕

As explained above, according to the present invention, the map is written in the control unit only when the shift gear after a shift change is higher than the previous gear and the shift gear is specified by the selector within a specified time from the previous shift gear. A map rewriting determination circuit is provided that controls the map so that it does not rewrite the map even if the next shift up to the same shift stage is performed, displays this when rewriting has been performed to all shift stages, and controls the rewriting to end. Because it is provided, even if you shift up from oscillation to the highest gear at once and then shift to neutral or downshift and stop the upshift,
At the next re-acceleration, only the map for the remaining shift gears can be rewritten automatically, saving you the trouble of turning on the map rewrite button, allowing you to easily control map rewriting without being affected by road traffic conditions. It can be performed.

[Brief explanation of the drawing]

FIG. 1 is a hardware configuration diagram of a diesel engine equipped with an automatic transmission according to the present invention, FIG. 2 is a control block diagram, and FIGS. 3 and 4 are control flowcharts. 13... Engine rotation sensor, 33... Vehicle speed sensor, 40... Selector, 41... Map rewriting button, 46... Map rewriting indicator lamp, 4
7...Writing status display lamp, 50...Control unit, 56...Learning circuit, 57...Map rewriting determination circuit.

Claims (1)

[Scope of utility model registration request] The detection signals from the engine speed detection means, vehicle speed detection means, and selector are compared with the shift map stored in the control unit to determine whether or not the shift change conditions are satisfied, and the determination result is that the shift change conditions are satisfied. It is equipped with a learning circuit that reads the vehicle speed at the time of shift-up into the memory and rewrites the map when the shift change is performed by specifying the shift stage with the selector with the map rewrite button on the control unit turned on. In automatic transmissions for vehicles, the control unit rewrites the map and updates the map only when the shift gear after a shift change is higher than the previous gear and the shift gear is specified by the selector within a specified time from the previous shift gear. A map rewriting determination circuit is provided which controls the map to be controlled so that the map is not rewritten even if a shift up to the same shift stage is performed, and the map is displayed when rewriting to all shift stages has been performed and the rewriting is completed. An automatic transmission device for vehicles featuring: