JPS646436Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shift-up control device for an auto transmission, which aims to shorten the acceleration time of an automobile equipped with an auto transmission.

An auto transmission device that automatically switches and controls the shift position according to driving conditions has been proposed in the past (Japanese Patent Application Laid-Open No. 1983-1999).
Publication No. 31669, Utility Application No. 187160, etc.). The shift-up method in these conventional autotransmissions was a method in which gears were shifted up one gear at a time starting from a low gear.

However, depending on the load conditions on the vehicle, it may be possible to shorten the vehicle's acceleration time by shifting up one step at a time, and the conventional auto transmission shift-up method is not necessarily rational. In a multi-stage transmission having a sub-transmission, both the main and sub-speed transmissions may be operated when shifting up to the next gear, resulting in a large time loss during acceleration.

This idea was made in view of the above circumstances.
The shift position immediately before the shift up during acceleration driving and the vehicle load condition based on the accelerator opening and vehicle acceleration are detected, and for each shift position one of the vehicle load conditions predetermined based on the accelerator opening and vehicle acceleration is detected. The vehicle load condition corresponding to the detected shift position is compared with the actual vehicle load condition based on both the detected values of the accelerator opening degree and vehicle acceleration, and the shift position is changed to the next gear or a shift gear skipped one gear based on the comparison result. The purpose of the present invention is to solve the conventional problems by automatically controlling the switching.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

This embodiment shows an example in which the present invention is applied to a 10-speed automatic transmission, and FIG. 1 shows the overall configuration thereof.

In the figure, an autotransmission 3 is connected to the output shaft of an engine 1 via a clutch 2. The engine 1 is provided with a rotation speed sensor 4 that detects the engine rotation speed and a governor actuator 5 that drives a governor control lever of the fuel injection pump, and the clutch 2 is provided with a clutch position detection sensor 6 and a clutch position detection sensor 6. An actuator 7 is provided. Further, the autotransmission 3 is provided with a vehicle speed sensor 8, a shift position detection sensor 9, and a shift change actuator 10. Further, at the base end of the accelerator pedal 11, there is an accelerator opening detection sensor 1 that detects the accelerator opening from the amount of depression of the accelerator pedal 11.
2 is provided. Signals from the aforementioned sensors are input to the control unit 20, and each actuator is driven and controlled based on these input signals.

FIG. 2 is a block diagram showing an example of the configuration of the control unit 20. As shown in FIG.

In the figure, signals from a shift position detection sensor 9 and an accelerator opening detection sensor 12 are directly input to a shift-up determination circuit 21, and a signal from a vehicle speed sensor 8 is differentiated by a differentiation circuit 22 and input to the shift-up determination circuit 21 as an acceleration signal. . Further, a signal is also input from the timer 23 to the shift-up determination circuit 21. Then, this shift-up determination circuit 21 reads the vehicle load condition map corresponding to the shift position detected by the shift position detection sensor 9 from the map of vehicle load conditions for each shift position set in advance, and reads the vehicle load condition map corresponding to the shift position detected by the shift position detection sensor 9. 12 and an acceleration signal based on the vehicle speed signal from the vehicle speed sensor 8, and determines whether or not the vehicle load condition detected satisfies the set condition, and shifts up based on the determination result. A shift up command to shift to the next gear or skip one gear is sent to the shift change operation control circuit 24.

The shift change operation control circuit 24 receives signals from a rotation speed sensor 4 that detects engine rotation, a vehicle speed sensor 8, a shift position detection sensor 9, and an accelerator opening detection sensor 12, and is further referred to as a shift up determination circuit 21, which will be described later. Control signals from a transmission control circuit 25 and a clutch control circuit 26 are input, and based on these, the shift position switching operation is controlled. The transmission control circuit 25, the clutch control circuit 26, and the shift change operation control circuit 24 each have control signals inputted to each circuit, and the transmission control circuit 25 is connected to the shift change operation control circuit 24 and the shift position detection sensor. The clutch control circuit 26 drives the clutch actuator 7 based on the signals from the clutch position detection sensor 6 and the shift change operation control circuit 24 to shift the clutch.
Turn on and off.

Next, the series of operations of the shift-up judgment circuit is explained in the third section.
This will be explained in detail with reference to the flowchart shown in the figure.

First, the shift position immediately before the shift up is detected by a signal from the shift position detection sensor 9 (step 1). Next, the above-mentioned detection is performed from a map of vehicle load conditions for each shift stage based on pre-stored acceleration and accelerator opening (in the case of a 10-speed transmission as in this embodiment, up to 8 speeds are sufficient). The map corresponding to the shifted position is read (step 2). Then, steps 3 and 4 are executed sequentially to detect acceleration and accelerator opening, and step 5
Then, it is determined whether the actual vehicle load based on the detected acceleration and accelerator opening matches the vehicle load condition of the selected map.

Here, the vehicle load conditions stored are load capacity, accelerator opening, and road condition (flat road, slope).
It is sufficient to set various load conditions for the vehicle, experiment the acceleration state at each shift stage, and decide based on the data. For example, for 4th and 6th speeds, as shown in Figures 4 and 5. In step 5, it is determined whether the detected vehicle load condition is within the shaded area. In addition, 4 in Figure 4
In the speed map, the vehicle load condition shown in the shaded area is 1 second.
If the above continues, the gear is shifted to the next gear, that is, 5th gear, and otherwise the gear is shifted up to 6th gear by skipping one gear.In the map for 6th gear in Fig. 5, on the contrary, the shaded area shows the area where the gear is shifted up by skipping one gear. .

In step 5, when it is determined that the detected vehicle load condition is in the shaded area of the map (YES), the timer counter starts integrating (step 6), and then the YES determination is performed for a predetermined period of time (1 sec). ) determine whether the time has elapsed (step 7),
Once the time has elapsed, turn on the shift up switch (step 8).

Furthermore, if the first detected vehicle load condition does not match the map, or if it does not continue for a predetermined period of time even if it matches, the determination in step 5 is NO and the shift-up switch is turned OFF (step 9). Turn on these shift-up switches or
After executing OFF, clear the timer counter (step 10) and prepare for the next acceleration operation.
Then, turn on/off the shift up switch.
Based on this, a shift up command to a predetermined shift stage is sent to the shift change operation control circuit 24.

For example, when accelerating from 4th gear, if the shift-up switch is ON, a shift-up command to 5th gear is issued, and the shift-up switch is turned on.
When it is OFF, it sends a shift up command to 6th gear, skipping one gear. In the case of 6th gear, conversely, when the shift-up switch is ON, a shift-up command is issued to 8th gear by skipping one gear, and when the shift-up switch is OFF, a shift-up command is issued to the next 7th gear. Let's do it.

Based on these shift up commands, the shift change operation control circuit 24, transmission control circuit 25 and clutch control circuit 26
A control signal is sent to the shift change actuator 10 and the clutch actuator 7, respectively.
to perform a shift operation to a predetermined shift stage.

In this way, an extremely rational acceleration operation can be performed and the acceleration time can be shortened. In particular, it is extremely effective for multi-stage autotransmissions equipped with main and auxiliary transmissions where both the main and auxiliary transmissions need to be operated depending on the shift position. Furthermore, since the acceleration of the vehicle is used as one of the conditions for selecting a shift stage at the time of upshifting, it is possible to reflect the effects of the vehicle's load capacity, road gradient, etc., and it is possible to optimally control upshifting according to these conditions.

As described above, according to the present invention, the vehicle load condition immediately before the shift-up operation is detected based on the accelerator opening degree and vehicle acceleration, and the next gear or the next gear is shifted depending on the detected actual vehicle load condition. Since it is possible to shift up, extremely efficient acceleration operation can be performed, acceleration time can be shortened, and the most effective acceleration can be achieved. Furthermore, since the vehicle acceleration is used as a condition for selecting a shift stage, the influence of the vehicle load, road gradient, etc. can be reflected upon upshifting, and optimum shift control can be performed according to these conditions.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention;
Fig. 2 is a block diagram of the control system of the same embodiment as above, Fig. 3 is a flowchart of shift-up determination, and Fig. 4
5 and 5 show examples of maps of vehicle load conditions set for each shift position. FIG. 4 is a map for 4th speed, and FIG. 5 is a map for 6th speed. 1... Engine, 2... Clutch, 3... Auto transmission, 4... Rotation speed sensor, 6
... Clutch position detection sensor, 7 ... Clutch actuator, 8 ... Vehicle speed sensor, 9 ... Shift position detection sensor, 10 ... Shift change actuator, 11 ... Accelerator pedal, 12 ... Accelerator opening Detection sensor, 21...Shift-up judgment circuit, 22...Differential circuit, 23...Timer, 2
4...Shift change operation control circuit, 25...Transmission control circuit, 26...Clutch control circuit.

Claims (1)

[Scope of utility model registration request] In an auto transmission that automatically switches and controls a shift position, a shift position detection means, an accelerator opening detection means, a vehicle acceleration detection means,
For each shift position, a vehicle load condition corresponding to the shift position detected by the shift position detection means is selected from predetermined vehicle load conditions based on the accelerator opening degree and vehicle acceleration, and this vehicle load condition and the accelerator are selected. Shift-up determining means compares actual vehicle load conditions based on values detected by both the opening degree detecting means and the vehicle acceleration detecting means, and determines whether to shift up to the next gear or to a shift gear skipped one gear based on the comparison result; 1. A shift-up control device for an auto transmission, comprising: a shift position switching control means for controlling the shift position to be switched to a predetermined shift stage based on the determination result of the shift-up determination means during acceleration driving.