JP3692487B2 - Vehicle shift control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes shift pattern storage means for storing a shift pattern of the transmission, and shift state setting means for setting the shift state of the transmission with reference to the shift pattern storage means in accordance with the driving state of the vehicle. The present invention relates to a vehicle shift control device, and more particularly to a vehicle shift control device having learning means for learning a correction amount so as to correct the shift pattern to a higher vehicle speed side even in accordance with an operating state of a brake.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, proposals have been made for providing an automatic transmission, storing a driver's shift pattern, learning the shift pattern, and automatically performing the shift pattern on condition that the accelerator is OFF.
JP-A-7-280076 is one of them.
[0003]
[Problems to be solved by the invention]
The technology of this publication learns a shift map according to the operating state of the main brake.
However, the heavy use of the main brake speeds up the wear of brake members such as brake shoes and brake linings, so the exhaust pipe is closed and the engine acts as a compressor, and an exhaust brake that obtains a braking force greater than the usual shift down is obtained. There are drivers that are frequently used as auxiliary brakes, and overdrive can be released as another auxiliary brake.
[0004]
For a driver using such an auxiliary brake, it is not possible to learn an accurate deceleration method for the driver only by learning the operating state of the main brake.
[0005]
SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a vehicle shift control device that can learn an accurate deceleration method of a driver regardless of the operating state of a main brake and an auxiliary brake operated by the driver. It is for the purpose.
[0006]
[Means for Solving the Problems]
The present invention solves such a problem. A shift pattern storage means for storing a shift pattern of the transmission and a shift pattern stored in the shift pattern storage means in accordance with the driving state of the vehicle are referred to. In a vehicle shift control device having a shift state setting means for setting a shift state , an evaluation value is assigned to a plurality of categories for a brake operation frequency within a predetermined time for each of a main brake and an auxiliary brake operated by a driver. The shift pattern storage means calculates the shift pattern correction amount for correcting the shift down vehicle speed to the higher speed side as the brake request degree is larger. It is characterized by having a learning means for inputting to.
That is, in the present invention, the transmission is automatically shifted down according to the driving state of the vehicle, and the method is applied to both the main brake and auxiliary brake operating states by the driver's operation. Memorize and learn and correct the shift pattern of the transmission.
[0007]
In the present invention, since the driver's method can be learned for any operating state of the main brake, the exhaust brake, and the release of the overdrive, such as the release of the overdrive, by the driver's operation, a beginner who makes heavy use of the main brake To a veteran driver using a lot of auxiliary brakes, and from a light vehicle to a heavy vehicle such as a truck that requires a large braking force.
[0008]
It is also an effective means of the present invention to change the correction amount of the learning means in accordance with the operating frequency of each brake.
Here, “the operation frequency of each brake” is a concept including an operation time within a predetermined time or the number of operations, but in the main brake, the number of operations, the release of the exhaust brake and the overdrive is the operation time. It is desirable to measure and obtain.
[0009]
Further, the present invention is characterized in that the correction amount of the learning means is changed according to the brake operation frequency calculated according to the brake signals generated by a plurality of brakes .
For example, the operation frequency of the brake signal generated by the main brake and auxiliary brake, or between multiple auxiliary brakes, is classified into small (small group), large (many group), and medium (group between small and large). Then, the correction amount is obtained by accumulating signals generated by a plurality of brakes.
Preferably, this classification is set in a stepless manner or in a plurality of steps with a small number of steps, and the correction amount is changed, so that the driver's driving method can be more matched .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Not too much.
[0011]
FIG. 1 is an electrical block diagram of a shift control apparatus used in the present invention, FIG. 2 is a shift-down diagram, FIG. 3 is a driver brake requirement degree determination table, and FIG. 4 is a flowchart.
In FIG. 1, a shift control device 1 stores a shift state setting means 2 for determining an optimum shift stage of an automatic transmission according to the conditions of a vehicle speed signal 5 and an accelerator opening signal 6, and stores a plurality of shift patterns to store the shift state. A shift pattern storage means 3 for giving one of the shift patterns to the shift state setting means 2 at the request of the setting means 2, an accelerator opening signal 6, a foot brake signal 8, an exhaust brake ON signal 7 as an auxiliary brake, and an overload A drive OFF signal 9 is received, and the operation frequency of each brake is measured every predetermined time, a correction amount for correcting the shift pattern is calculated and sent to the shift pattern storage means 3 and learning means 4 for correcting the shift pattern is provided. ing.
[0012]
The exhaust brake operating member and the overdrive operating member of the auxiliary brake are arranged at positions where the driver can operate, although not shown.
The exhaust brake operation member is operated to set the exhaust brake mode, and when the accelerator is depressed, the exhaust brake is turned off and the exhaust brake is canceled.
Further, the overdrive mode is set by operating the overdrive operating member, the overdrive is turned off by releasing the accelerator, and the overdrive mode is restored by depressing the accelerator.
[0013]
Next, the learning means 4 will be described in more detail. The learning means 4 sets the operation frequency of the overdrive OFF signal 9, the exhaust brake ON signal 7 and the foot brake (main brake) signal 8 to a small (small group), large (many group), medium (small and large intermediate). The correction amount is obtained by accumulating signals generated by a plurality of brakes as shown in FIG.
[0014]
Each brake operation signal can be taken into the learning means at all times while the engine is being driven, and is taken every predetermined time (for example, 30 minutes).
In the case of the overdrive OFF signal 9, the brake operation frequency is set to the overdrive mode by operating the overdrive operation member. In that state, the time is measured from the time when the OFF signal comes in by releasing the accelerator. When the accelerator is stepped on again, the OFF signal is stopped. The time from the arrival of the signal to the stop is accumulated within a predetermined time, and is classified into small, medium and large in the order of short accumulated time, and stored in the learning means 4 as shown in the first column of FIG.
[0015]
In the case of the exhaust brake ON signal 7, the exhaust pipe is closed by releasing the accelerator and operating the exhaust brake operation member, the exhaust brake ON signal comes in, the time is measured from that point, and the accelerator is depressed again. The ON signal stops. The time from the arrival of the signal to the stop is accumulated within a predetermined time, and is classified into small, medium and large in order of short accumulated time, and stored in the learning means 4 as shown in the second column of FIG.
[0016]
In the case of the foot brake 8, the foot brake ON signal comes in by releasing the accelerator and stepping on the foot brake petal, and the frequency of foot brake use is measured from at least one of the number of times, the time per step, and the amount of depression. The footbrake usage frequency is stored in the learning means 4 as shown in the third column of FIG.
[0017]
The above-mentioned overdrive OFF signal time, exhaust brake ON signal time, and foot brake usage frequency are calculated as a total for each of small (a), medium (b), and large (c) to obtain a brake request level.
When the brake requirement is small (a), it is determined that the driver prefers to drive at low speed without using the brake so much. When the brake requirement is medium (b), the brake is used relatively fast. It is determined that the driver prefers to travel at high speed, and if the degree of brake demand is large (c), it is determined that the driver prefers traveling at high speed that often uses the brake.
[0018]
FIG. 2 is an explanatory diagram for explaining the vehicle speed to be corrected in accordance with the above-described brake request level with respect to the basic shift pattern.
In the figure, when the degree of brake demand is small (a), the basic speed as shown in (a) for the vehicle speed V1 on the basic shift pattern for shifting down from the 4th speed to the 3rd speed of the 4-speed transmission. Shift down when the accelerator is released on the high speed side near the vehicle speed V1.
[0019]
Further, when the brake demand level is medium (b), the vehicle shifts down on the high speed side farther from the basic vehicle speed V1 than (a), and when the brake demand level is large (c), the basic level is based on (b). Shift down on the high-speed side farther to the vehicle speed V1
If the operation signal of each brake does not come within a predetermined time, the brake request degree cannot be calculated, so that the downshift is performed according to the shift pattern stored up to the previous time.
[0020]
It should be noted that the shift pattern correction amount in the present embodiment is preferably corrected when the accelerator opening is zero for correction based on the brake requirement.
In addition, the shift pattern correction amount in the present embodiment is a correction amount for the previously stored shift pattern.
[0021]
Further, in this embodiment, the brake requirement level is divided into three stages of small, medium, and large, but this division can be set steplessly or in steps of a plurality of steps. Or, of course, it is possible to match the driving method of the driver more by changing the correction amount by setting in a plurality of steps with fine steps.
[0022]
Next, the flow of the shift pattern correction portion will be described with reference to FIGS.
While the vehicle engine is being driven, the vehicle speed signal 5, the accelerator opening signal 6, the exhaust brake ON signal 7, the foot brake signal 8, and the overdrive OFF signal 9 are taken into the learning means 4 by each sensor (20).
[0023]
In the learning means 4, the above-described brake request level is calculated and a correction amount is calculated (21).
When a brake demand level equal to or greater than a predetermined amount is calculated (22), a correction amount is sent to the shift pattern storage means 3, and the shift pattern stored in the shift pattern storage means 3 is corrected based on this correction amount, A new shift pattern is stored (23).
Then, downshifting is performed according to the shift pattern.
On the other hand, if a brake demand level equal to or greater than a predetermined amount is not calculated within a predetermined time (24), a downshift is performed according to the previously stored shift pattern.
[0024]
In addition, the brake demand changes from moment to moment due to road surface conditions, traffic conditions, or driver changes, but the shift pattern is corrected to a new shift pattern at each capture time, so it is gradually updated to a driver-specific shift pattern. It will be calmed down.
[0025]
In addition, since the shift pattern is corrected to a new shift pattern at each capture time, the road surface or traffic condition at that time can be set by appropriately setting the capture time and / or weighting at each stage when determining the brake demand level. The shift pattern can be automatically changed according to the above.
[0026]
In this embodiment, the engine brake or exhaust brake with overdrive OFF is used as the auxiliary brake. However, as an auxiliary brake, not only an electromagnetic or fluid type retarder but also an engine exhaust valve is compressed. Needless to say, it may be a compression pressure release type engine auxiliary brake that opens in the vicinity of the stroke top dead center.
Moreover, in the conventional learning of the shift pattern using only the foot brake, it is possible to learn the optimum shift pattern even for the truck and the bus.
[0027]
【The invention's effect】
As described above, the present invention can learn the driver's method for any operating state of the main brake and the auxiliary brake, so from beginners to veteran drivers, it is possible to run, stop, etc. on downhill roads and urban areas Downshifting is performed automatically, and an appropriate engine brake can be obtained.
[Brief description of the drawings]
FIG. 1 is an electrical block diagram of a shift control device used in the present invention.
FIG. 2 is a shift-down diagram.
FIG. 3 is a determination table of a driver's brake request degree.
FIG. 4 is a flowchart according to the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shift control apparatus 2 Shift state setting means 3 Shift pattern storage means 4 Learning means

Claims (1)

Shift pattern storage means for storing the shift pattern of the transmission, and shift state setting means for setting the shift state of the transmission with reference to the shift pattern stored in the shift pattern storage means in accordance with the driving state of the vehicle. In a vehicle shift control apparatus comprising:
The brake operation frequency within a predetermined time in each of the main brake and the auxiliary brake by the operation of the driver is divided into a plurality of categories with an evaluation value, and a brake request degree is obtained from the total of the evaluation values in each brake, A shift control apparatus for a vehicle comprising learning means for calculating a correction amount of a shift pattern for correcting the downshift vehicle speed to a higher speed as the brake requirement level is larger and inputting the correction amount to the shift pattern storage means.

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