JPH03258931A - Automatic variable speed control device - Google Patents

Abstract

PURPOSE:To reduce speed-change shock by providing a mean for forcedly stopping an auxiliary device when a car is in accelerated conditions, and a means for putting the auxiliary device in operating conditions when a variable speed switching means shifts the transmission ratio from high gear to low gear. CONSTITUTION:After a vehicle having an automatic transmission is kicked-down first gear in order to obtain acceleration, and an air conditioner 12 is forced to be stopped by an air-conditioning stopping means 8, a throttle sensor 2 and a car-speed sensor 3 judge whether the car speed is increased to be shifted-up from first gear to second gear or not. When the car is shifted-up, a switching signal is outputted to a gear change part 10, and when an air-conditioning switch 5 is turned on and air-conditioning-cut control is performed, the switching signal is outputted to an air-conditioning operating means 9 to operate the air conditioner 12 again. When air-conditioning-cut control is not performed, the set ignition timing is treated to be corrected based on an engine condition detecting sensor 6. When the car is not shifted-up, a counter operates the air conditioner again if a specified time is exceeded. In this case, the ignition timing is managed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic transmission control device, and is used, for example, in a device for alleviating the transmission shock of an automatic transmission.

[Prior Art] In order to improve the acceleration performance of a vehicle, conventional automatic transmissions downshift to first or second gear during acceleration (for example, when the accelerator is strongly depressed). For the same purpose, there is a device that forcibly stops the air conditioner to reduce the load on the engine if the auxiliary equipment, such as the air conditioner, is in operation during acceleration (for example, see Utility Model Application No. 62-101048). ).

[Problem to be solved by the invention]

However, in the conventional vehicle described above, the vehicle speed increases as the accelerator is depressed and the vehicle accelerates.

Then, the automatic transmission performs an upshift (for example, from 1st gear to 2nd gear) based on an automatic gear shift diagram determined using the vehicle speed and throttle opening as parameters.

At this time, since the accelerator is being depressed, the engine speed increases, and the driving torque (torque transmitted from the engine to the automatic transmission) increases accordingly.

Under the above situation, when the clutch in the automatic transmission is disengaged due to the shift amplifier, the engine becomes unloaded and the engine speed increases.6 Also, since the accelerator is depressed, the driving torque also increases. go.

On the other hand, the wheels that receive driving torque from the engine via the automatic transmission are disconnected from the engine when the clutch in the automatic transmission is disengaged. Therefore, the torque that causes the wheels to kick off the ground and move the vehicle forward, that is, the propulsion torque (the torque generated between the automatic transmission and the wheels) decreases, and the wheel rotation speed also decreases.

When the clutch in the automatic transmission is then engaged, the increased drive torque and decreased propulsion torque are momentarily combined. Then, there is a problem in that a shift shock occurs due to the difference in magnitude between the driving torque and the propulsion torque. In other words, since the driving torque is greater than the propulsion torque, there is a problem in that a shift shock occurs.

Therefore, an object of the present invention is to alleviate the shift shock that occurs when upshifting in a vehicle that is equipped with an automatic transmission and a device that forcibly stops the auxiliary device if the auxiliary device is in operation during acceleration. shall be.

[Means for Solving the Problems] Therefore, the present invention provides: an acceleration detection means for detecting an acceleration state of an engine of a vehicle; and an auxiliary equipment driven by the engine when the engine is in an acceleration state by the acceleration detection means. auxiliary equipment stopping means for forcibly stopping the auxiliary equipment when the auxiliary equipment is in an operating state; a gear changeover means for automatically changing the gear position of the transmission; If the auxiliary equipment has been forcibly stopped by the auxiliary equipment stop means when switching from 1 to 2 to a gear with a lower gear ratio, auxiliary equipment activation causes the auxiliary equipment to be put into operation again at the time of the switching. The present invention employs an automatic transmission control device characterized by comprising means.

[Effect]

With the above configuration, the auxiliary equipment operating means is such that when the gear changeover means switches from a gear position with a high gear ratio to a gear position with a low gear ratio, the auxiliary equipment device is forced to operate in response to acceleration by the auxiliary equipment stop means. If the auxiliary equipment has been stopped, the auxiliary equipment is brought into operation again when changing gears.

That is, when changing the gear stage, the auxiliary equipment is put into operation again, and the load on the engine is increased again. Therefore, due to this increase in engine load, the driving torque of the engine can be reduced.

[Effects of the Invention] As described above, in the present invention, when changing gears, the load on the engine is increased and the driving force of the engine is reduced.

Therefore, the difference between the propulsion torque and the drive torque of the wheels is suppressed, which has the excellent effect of alleviating the shift shock that occurs when changing gears.

Furthermore, since the auxiliary equipment is put into operation again to increase the load on the engine, the present invention can be configured using existing equipment.

[Example: The present invention will be described below based on an example shown in the drawings. In the embodiment, a case will be described in which an air conditioner is used as an auxiliary device.

FIG. 1 is a block diagram showing an outline of the apparatus of the present invention. In FIG. 1, a throttle sensor 2 is a sensor that detects the opening degree of a throttle valve (not shown), and a vehicle speed sensor 3 is a sensor that detects the speed of a vehicle. In addition, the detection signals from the throttle sensor 2 and vehicle speed sensor 3 are manually inputted to an electronic control unit (ECU) 7.
7, the acceleration determining unit 1 determines the acceleration state based on both signals. Here, each detection signal of the throttle sensor 2 and the vehicle speed sensor 3 is used in the shift shock mitigation determination section 13 forming the ECU 7 in addition to the acceleration determination. The acceleration detection means 4 includes a throttle sensor 2, a vehicle speed sensor 3, and an acceleration determination section 1.

The air conditioner switch 5 is operated by the driver or the like to switch the auxiliary device C (hereinafter referred to as the air conditioner) 1, since it is an air conditioner in this embodiment.
2 is commanded (on) or not (off), and outputs a signal to the ECU 7. Furthermore, air conditioner 12
is driven by rotational driving force from an engine (not shown).

The engine state detection sensor 6 includes an engine rotation sensor, an air flow meter, and the like. The ECUT also includes a device that operates the energization timing to the ignition coil, that is, the ignition timing, in response to the engine condition detection sensor 6 and the change processing described later. The equipped device is disclosed in, for example, Japanese Patent Application Laid-open No. 56-399.
Since it is publicly known from Japanese Patent No. 25, the explanation will be omitted in this embodiment.

The auxiliary machine stop means (hereinafter referred to as the air conditioner stop processing unit) 8 is
The air conditioner 12 is stopped by a stop signal output from the ECU 7. In addition, the auxiliary equipment operation means (hereinafter referred to as the air conditioner operation processing section) 9 is a shift shift relaxation determination section 1 of the ECU 7.
The air conditioner 12 is operated by the operation signal output from the air conditioner 3.

In addition, the gear shift switching means (hereinafter referred to as a gear stage switching unit) 10 is
A switching signal corresponding to the shift position determined by the ECU 7 based on the detection signals of the throttle sensor 2 and the vehicle speed sensor 3 is input, and the gear stage is switched.

Next, the operation of the above configuration will be explained using FIG. 1 and a flowchart showing the operation of the shift shock mitigation determining section 13 of the ECU 7 in FIG. 2.

In this embodiment, a vehicle with an automatic transmission performs kickdown (downshift in a region where the throttle opening is close to 100%, for example, downshift from 4th gear to 1st gear) in order to obtain acceleration. The control performed when the air conditioner that is in operation is forcibly stopped by the air conditioner stop means, and then the vehicle speed increases and the vehicle shifts from 1st gear to 2nd gear will be explained. The flowchart in Figure 2 uses kickdown (for example, 4
12 is a flowchart after performing a downshift from speed to l speed. Further, since this shift control such as kickdown is well known, the explanation thereof will be omitted in this embodiment. Furthermore, for the same purpose (improving acceleration performance), there is also a control for forcibly stopping (air conditioner cut) the air conditioner that is operating during acceleration, as there is, for example, Japanese Utility Model Application Publication No. 1983-101048, so this explanation will not be given in this example. Omitted.

In step 100 in FIG. 2, after kinking down to 1st gear, the vehicle speed increases to determine whether to shift up from 1st gear to 2nd gear using detection signals from throttle sensor 2 (FIG. 1) and vehicle speed sensor 4. Judgment is made based on. Incidentally, such a determination means is known in the control of a well-known automatic transmission. If the shift door or shift is not to be performed, the process proceeds to step 106; if it is to be performed, the process proceeds to step 101 to perform upshift processing (outputting a switching signal to the gear change section 10 (Fig. 1)), and then proceeds to step 102. .

The steering wheel 102 determines whether the air conditioner switch is on or not based on the signal from the near console inch 5 (FIG. 1). If the near cons inch is off, the process proceeds to step 103; if it is on, the process proceeds to step 104.

In step 104, it is determined whether the air conditioner cuff control is being performed or not by determining whether a signal is output to the air conditioner stop processing section 8 (FIG. 1). If the air conditioner cut control is not being performed, the process proceeds to step 103 and a process is executed to correct the ignition timing set based on the engine condition sensor 6 so as to alleviate the shift shock. In response to this process, the ignition timing for alleviating the shift shock is controlled.

If the air conditioner cut control is being performed in step 104, the process proceeds to step 105, where the air conditioner 12 (FIG. 1)
In order to operate the air conditioner again, the air conditioner operation processing section 9 (Fig. 1)
Outputs an activation signal to and finishes the process.

If it is determined in step 100 that upshifting is not to be performed, the process proceeds to step 106.

In step 106, similarly to step 102, it is determined whether the air conditioner switch is on. If the air conditioner switch is off, the process ends; if it is on, the process proceeds to step 107.

In step 107, similarly to step 104, it is determined whether air conditioner cuff control is being performed. If the air conditioner cant control is not being performed, the G' process is completed; if it is being performed, the process proceeds to step lo8.

In step 108, the counter C is incremented by one, and the process proceeds to step 109. In step 109, the predetermined time T and the counter C are compared, and the counter C indicates the predetermined time T.
If it is below, the process returns to step 100. However, counter C
If the time exceeds the predetermined time T, the process proceeds to step 110, where an activation signal is output to the air conditioner activation processing section 9 (FIG. 1) in the same manner as in step 1.5, and the process ends.

According to this embodiment described above, when the gear is shifted from the first gear to the second gear, if the air conditioner switch is on and the air conditioner cut control is being performed, the air conditioner is operated again. Therefore, the load on the engine increases and the driving torque of the engine is suppressed. Then, as mentioned above, when the clutch in the automatic transmission is engaged and the driving torque of the engine and the propulsion torque of the wheels are integrated, the difference in magnitude between the driving torque and the propulsion torque occurs because the driving torque is suppressed. becomes smaller and the shift shock is alleviated.

If the air conditioner is not restarted as described above, the shift shock is alleviated by controlling the ignition timing.

Furthermore, even if the shift amplifier is not performed, if the counter C exceeds the predetermined time T, the air conditioner is restarted.

Therefore, in cases where it takes time to shift from 1st to 2nd gear (such as when the car is pitched), the advantage is that the comfort in the cabin can be maintained by not forcing the air conditioner to stop for a long time. There is. In this case, the shift shift is alleviated by controlling the ignition timing.

Next, a time chart showing the passage of time in the above-described embodiment will be explained based on FIGS. 3 and 4.

FIG. 3 is a time chart when the vehicle is traveling on a flat road. In FIG. 3, when acceleration is detected, the air conditioner is turned off and the shift position is shifted down from 4th gear to 1st gear. Then, when the vehicle speed increases and you shift from 1st gear to 2nd gear, turn on the air conditioner again. Therefore, as described above, shift shock can be alleviated.

Next, FIG. 4 is a time chart when the vehicle is running on a boarding road. In FIG. 4, when acceleration is detected, the air conditioner is turned off and the shift position is shifted down from 4th gear to 1st gear. However, due to the road being uphill, the vehicle's speed only increases gradually, so it takes time to shift from 1st to 2nd gear. If the predetermined time T has elapsed since the air conditioner was turned off, the air conditioner is turned on again. As a result, the comfort inside the vehicle can be maintained without forcing the air conditioner to stop for a long period of time.

In this case, the shift shock is alleviated by controlling the ignition timing.

In this embodiment, the air conditioner is stopped during acceleration, but other in-vehicle auxiliary devices driven by the engine, such as an alternator and a water pump, may be stopped in addition to the air conditioner.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing one embodiment of the present invention, Fig. 2 is a flowchart showing the operation of the ECU used in the above embodiment, and Fig. 3 is a case where the vehicle is running on a flat road in the above embodiment. FIG. 4 is a time chart when the vehicle is running on a boarding road in the above embodiment. 4... Acceleration detection means, 8... Air conditioner stop processing unit (
9... Air conditioner operation processing section (auxiliary machine operation means), 10... Gear stage switching section (speed change switching means).

Claims (2)

[Claims] (1) acceleration detection means for detecting the acceleration state of the engine of the vehicle; and when the auxiliary equipment driven by the engine is in the operating state when the engine is in the acceleration state, the auxiliary equipment is detected by the acceleration detection means; An auxiliary equipment stop means for forcibly stopping the device; a gear change means for automatically changing the gear position of the transmission; and a gear change means for automatically changing the gear position of the transmission; and auxiliary equipment operating means for putting the auxiliary equipment into an operating state again at the time of the switching, if the auxiliary equipment is forcibly stopped by the auxiliary equipment stopping means when the auxiliary equipment is switched. Control device. (2) In the gear changeover means, when a shift from a gear with a high gear ratio to a gear with a low gear ratio is not performed even after a predetermined time has elapsed, the auxiliary equipment operating means activates the auxiliary equipment at the predetermined time. 2. The automatic transmission control device according to claim 1, wherein the automatic transmission control device is configured to put the gear into operation again.