JPS62151655A - Automatic speed change control device - Google Patents

Abstract

PURPOSE:To always attain favorable drivability even if the weight of a crew or the weight of a cargo changes by providing shift pattern select means adapted to memory a plurality of shift patterns, and select one shift pattern of the plural shift patterns according to a detected weight of a car. CONSTITUTION:A micro-processor 2 memories shift patterns 1, 2, 3. The shift patterns 1, 2, 3 are in the order of decreasing the number of low speed gears used. When the weight of a car is light, the shift pattern 1 is favorable, when the weight of the car is heavy, the shift pattern 3 is favorable, and when the weight is middle between the above, the shift pattern 2 is favorable. According to a load signal from pressure sensors PS1 selects a shift pattern. Thus, corre sponding to increase and decrease of the weight of a crew and a cargo, the shift pattern is changed in three stages, so that deterioration of drivability due to a change of the weight of a car can be prevented to always attain favor able drivability.

Description

Detailed Description of the Invention 3. Field of Industrial Application of the Invention The present invention relates to an automatic transmission control device, and more specifically,
An automatic transmission control device stores a plurality of shift patterns and appropriately selects one of the plurality of shift patterns.

An automatic transmission control device is a device that automatically switches gears according to vehicle speed, throttle opening, etc., and stores a shift pattern for the switching in advance.

Since this shift pattern has a large effect on drivability, the optimum shift pattern is determined depending on the type of vehicle, taking into consideration the purpose of the vehicle, engine displacement, etc.

Furthermore, in order to be able to obtain drivability tailored to driving conditions and driver preferences, even in the same car, multiple shift patterns can be memorized and one of them can be selected as appropriate using a changeover switch. There is something like this. A well-known example of a vehicle capable of selecting such a shift pattern is a vehicle equipped with "economy" and "power" pattern select switches.

Further, a similar conventional example is disclosed in Japanese Patent Laid-Open No. 101830/1983.

The weight of the car has a major influence on the drivability of the car, but the weight of the car is affected by the number of passengers actually on board and the amount of luggage carried on board. It changes depending on.

However, conventional shift patterns are determined assuming a constant vehicle weight, and do not take into account actual changes in vehicle weight as described above.

Therefore, there is a problem in that it is impossible to deal with the fact that drivability actually changes depending on the number of passengers and the amount of luggage.

OBJECTS OF THE INVENTION It is an object of the present invention to provide an automatic transmission control device that can select an optimal shift pattern in response to actual changes in vehicle weight depending on the number of passengers, amount of luggage, etc. There is a particular thing. In other words, this is an attempt to always obtain good drivability.

Structure of the Invention The automatic transmission control device of the present invention is an automatic transmission control device that automatically switches gears according to vehicle speed, throttle opening, etc. and based on a predetermined shift pattern, and includes vehicle weight detection means for detecting vehicle weight. , and shift pattern selection means for storing a plurality of soft patterns and selecting one of the plurality of shift 1 patterns based on the detected vehicle weight.

Function: In the automatic transmission control device of the present invention, the vehicle weight detection means detects the vehicle weight, and the shift pattern selection means selects an appropriate shift pattern based on the detected weight.

Therefore, even if there are changes in the number of passengers or the amount of luggage, a shift pattern corresponding to the change is selected, and good drivability can always be obtained.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below based on embodiments shown in the drawings. Here, FIG. 1 is a block diagram of the main parts of an automatic transmission control device according to an embodiment of the present invention, FIG. 2 is a flowchart of the main parts, and FIG. 3 is a shift pattern diagram of tag, +b+, and (C1). However, the present invention is not limited to the embodiments shown in the figures.

In the automatic shift control device 1 shown in FIG. 1, the microprocessor 2 is the central part of shift control, and receives a vehicle speed signal from a vehicle speed sensor S and a throttle opening signal from a throttle sensor TS.

Shift position signal from shift lever 3L and pressure sensor PS1 embedded under the seat and luggage compartment
The load m signal from PS5 and the pattern select signal from the soft pattern selection instruction switch SP are input, and the solenoid C3I for changing gears is input.
A gear change signal is output to C32.

Furthermore, the microprocessor 2 processes the shift pattern 1.fat shown in FIG. Shift pattern 2 shown in Figure 3 (bl) and shift pattern 3 shown in Figure 3 FC+ are stored.These patterns 1, 2.3 are patterns that use many low speed gears in this order. That is, shift pattern 1 is preferable when the vehicle weight is light, shift pattern 3 is preferable when the vehicle weight is heavy, and shift pattern 2 is preferable between them.

Selection of the shift pattern is performed as shown in FIG.

That is, the microprocessor 2 first reads the shift pattern selection instruction switch SP, determines whether it is "automatic", "power", or "economy", and if it is other than "automatic", selects the corresponding shift pattern. Move to
If it is "automatic", the process shifts to detecting the vehicle weight and selecting a shift pattern (Sl).

In the process of detecting vehicle weight and selecting a shift pattern, sensors PSI to PS! The output of l is read and data D1
~D5 (Sl).

These data D, ~D, are calculated using weights w, -W
, (S3).

Since the weight of the car body itself is constant, step S above
The sum of the carts W and -W obtained in step 3 is the increment W of the cart m (S4).

A preset first level Wa (e.g. Eva 200k
g> and the vehicle weight increase W are compared (S5), and if W<Wl, the vehicle weight has not increased that much, so shift pattern 1 is selected.

If W<Wa, the second level Wb (for example, 3
00kg) (S6), and if W<W+, then
Shift pattern 2 is selected because the vehicle weight has increased moderately.

If W<W+, the vehicle weight has increased significantly, so shift pattern 3 is selected.

After a shift pattern is selected, the shift gears are controlled in accordance with the vehicle speed and throttle opening based on the selected shift pattern, which is similar to the conventional process.

As understood from the above explanation, this automatic transmission control device i! According to No. 1, the shift pattern is changed to 3rd gear according to the increase or decrease in the weight of the occupants and luggage, so deterioration of drivability due to changes in vehicle weight is prevented, and good drivability is always obtained. be able to.

In another embodiment, the vehicle weight detection means may be one that detects the amount of depression of the suspension and obtains the vehicle weight based on this.

Effects of the Invention According to the present invention, there is provided an automatic transmission control device that automatically switches transmission gears according to vehicle speed, throttle opening, etc. and based on a predetermined shift pattern.

A vehicle weight detection means for detecting the vehicle weight, and a shift pattern selection means for storing a plurality of soft patterns and selecting one of the plurality of shift patterns based on the detected 1ffl! 4 automatic shift control devices are provided, which selects a shift pattern that matches changes in vehicle weight, so even if there are changes in passenger capacity or cargo weight, the shift pattern remains stable. You can get excellent drivability.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the main parts of an automatic transmission control device according to an embodiment of the present invention, FIG. 2 is a flowchart of the main parts, and FIG.
l, (bl, +c+ are soft pattern diagrams respectively. Explanation of symbols l... Automatic transmission control device 2... Microprocessor vS... Vehicle speed sensor TS... Throttle sensor SL... Shift lever ps ,~PS,...Pressure sensor SP...Shift pattern selection instruction switch C31,C
3. Solenoid for gear switching.

Claims (1)

[Claims] 1. An automatic transmission control device that automatically switches transmission gears according to vehicle speed, throttle opening, etc. and based on a predetermined shift pattern, includes a vehicle weight detection means for detecting vehicle weight, and a vehicle weight detection means for storing a plurality of shift patterns and detecting the shift patterns. An automatic transmission control device comprising shift pattern selection means for selecting one of the plurality of shift patterns based on the weight of the vehicle.