JP2898484B2 - Output control device for vehicles with automatic transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output control device for controlling an engine output of a vehicle equipped with an automatic transmission, and more particularly to an output control device capable of reducing a shock when a shift lever is switched when the vehicle is stopped.

[0002]

2. Description of the Related Art Automatic transmissions are usually provided with a neutral range (hereinafter referred to as N range) and a parking range (hereinafter referred to as P range).
And a drive range (hereinafter referred to as a D range) and a reverse range (hereinafter referred to as an R range). And at the start,
The vehicle is started by shifting from the N range or the P range to the D range or the R range.

[0003]

However, at the time of sudden start such as shifting to the D range or the R range in a state where the engine is idled and the rotation speed is increased in the N range or the P range, a large torque is suddenly increased. Acts on the automatic transmission, and as a result, a shock or a noise may be generated when the vehicle starts, or in extreme cases, the clutch may be abnormally worn.

The present invention has been made in view of the above circumstances, and in a vehicle equipped with an automatic transmission, the automatic transmission equipped with an automatic transmission capable of reliably reducing shock and noise when starting the vehicle and preventing abnormal wear of the clutch. It is intended to provide a vehicle output control device.

[0005]

According to a first aspect of the present invention, there is provided an output control apparatus for a vehicle equipped with an automatic transmission, wherein a throttle opening at a shift shift from a neutral range or a parking range to a drive range or a reverse range is set to a predetermined value. At least one of the engine output reduction amount and the reduction time in the following cases is smaller than at least one of the engine output reduction amount and the reduction time when the throttle opening is equal to or more than a predetermined value, and the throttle opening is The engine output is controlled so that at least one of the engine output reduction amount and the reduction time when the throttle opening at the time of the shift shift is equal to or more than the predetermined value is kept constant so that the degree decreases as the degree decreases. It is characterized by having output control means for controlling.

According to a second aspect of the present invention, there is provided an output control device for a vehicle equipped with an automatic transmission, wherein the engine has a low throttle opening when a shift shift from a neutral range or a parking range to a drive range or a reverse range is performed. At least one of the output reduction amount and the reduction time is smaller than at least one of the engine output reduction amount and the reduction time when the throttle opening is the middle throttle opening, and the throttle opening is a high throttle. In the case of the opening, an output for controlling the engine output such that at least one of the reduction amount and the reduction time of the engine output is larger than the low throttle opening and smaller than the medium throttle opening. It is characterized by having control means.

According to the output control apparatus for a vehicle equipped with an automatic transmission according to the first aspect of the present invention, when the throttle opening during a shift shift from a neutral range or a parking range to a drive range or a reverse range is smaller than a predetermined value. The output control means sets at least one of the engine output reduction amount and the reduction time to be smaller than at least one of the engine output reduction amount and the reduction time when the throttle opening is equal to or more than a predetermined value, and If the throttle opening during the shift is equal to or greater than the predetermined value, at least one of the engine output reduction amount and the reduction time is kept constant. Is controlled as follows.

Thus, in the high engine speed region where the throttle opening is equal to or more than a predetermined value, at least one of the engine output reduction amount and the reduction time is large and constant, so that the shock and noise at the time of starting the vehicle are reduced. As a result, the clutch can be reliably reduced, and abnormal wear of the clutch can be prevented. Also,
In the low engine speed region where the throttle opening is equal to or less than the predetermined value, at least one of the engine output reduction amount and the reduction time is small and decreases as the throttle opening decreases. Can be.

According to the output control device for a vehicle equipped with an automatic transmission according to the second aspect of the present invention, the output control means reduces the throttle opening during a shift shift from the neutral range or the parking range to the drive range or the reverse range. In the case of the throttle opening, at least one of the reduction amount and the reduction time of the engine output is set to be smaller than that in the case of the medium throttle opening, and when the throttle opening is a high throttle opening, the engine output is reduced. The engine output is controlled so that at least one of the amount and the reduction time is larger than the low throttle opening and smaller than the medium throttle opening.

Thus, in a region where the engine speed is relatively high, that is, at a medium throttle opening, at least one of the reduction amount and the reduction time of the engine output is large, so that the shock and noise when starting the vehicle are surely reduced. It is possible to reduce abnormal wear of the clutch. Also, in the low engine speed region where the throttle opening is low,
Since at least one of the reduction amount and the reduction time of the engine output is small, the normal start can be performed without any trouble. Further, in a high engine speed region where the throttle opening is high, at least one of the engine output reduction amount and the reduction time is larger than the low throttle opening and smaller than the medium throttle opening. It can satisfy the driver's acceleration demand.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a Ravigneaux-type four-speed automatic transmission and a control device for describing an output control device of a vehicle equipped with an automatic transmission according to a first embodiment of the present invention. In both cases, the throttle opening and E at the start of the vehicle
6 is a table showing a relationship with a / G retard amount or a torque down amount. In Table 1, a vehicle having a displacement of 1600 cc is taken as an example.

In FIG. 1, an automatic transmission 10 includes a torque converter 1 with a lock-up mechanism, first and second sun gears S1 and S2, first and second pinion gears P1 and P2,
And a transmission gear device 2 having a Ravigneaux gear train composed of a ring gear 9 and first to third clutches C1 to C3.
And an input path switching device 3 composed of

In the torque converter 1, a pump impeller 1f is connected to a converter case 1e connected to a crankshaft 1d of an engine, and a turbine liner 1a is disposed opposite to the pump impeller 1f. (Not shown) so as to be rotatable. The lock-up mechanism is not shown in the figure.

The second sun gear S2 of the transmission 2
Is rotatably arranged around an output side shaft 14 coaxially arranged with the input shaft 1b. The first sun gear S1 is rotatably arranged on a boss portion of the second sun gear S2. A boss portion of the carrier 8 is spline-fitted to the output side shaft 14. The carrier 8 rotatably supports the first and second pinion gears P1 and P2. The second pinion gear P2 is connected to the second sun gear S2, and the first pinion gear P1 is connected to the first sun gear S1.
It is in mesh with the first and second pinion gears P2, respectively.
A one-way clutch C4 and a second brake B2 are provided on the outer peripheral portion 8b of the carrier 8. Further, the boss of the output take-out ring gear 9 meshed with the first pinion gear P1 is rotatably mounted on the boss of the carrier 8.

The operation of each engagement element is controlled by supplying hydraulic pressure to a hydraulic servo provided corresponding to each engagement element. The supply of the hydraulic pressure is controlled by solenoid valves 21, 22, 23 provided in the hydraulic control device 20. A microcomputer 24 operated by a predetermined program includes a CPU connected to each other by a bus 25.
26, ROM 27, RAM 28, A / D converter 29
And the I / O port 30, and outputs the energizing signals a 1, a 2, a 3 and the ignition signal b sent to the solenoid valves 21, 22, 23 and the ignition device 31 to the vehicle speed V, the intake throttle opening θ, the intake air The calculation is based on the flow rate Q and the like.

[0016]

[Table 1] Table 1 is stored in the ROM 27 of the microcomputer 24.
Is stored. In this table, when the throttle is fully opened and the opening is 100%, the range is changed from N range or P range to D range or R range.
When the throttle opening θ at the time of shifting to the range is 15% or more, the E / G retard amount is 40 °, and the throttle opening θ is 1
At 5% or less, the E / G retard amount is set to 0 ° to 40 °. Note that in the range where the throttle opening θ is 15%, the E / G retard amount may be set so as to gradually decrease as the opening θ gradually decreases. Each numerical value in Table 1 is a particularly preferable numerical value in the case of this vehicle having a displacement of 1600 cc.

Next, the operation and effect of this embodiment will be described. When the throttle opening signal θ is input when the vehicle starts, the microcomputer 24 performs control based on the table shown in Table 1. That is, when the throttle opening θ is 15% or more, the E / G retard amount is set to be constant at 40 °, and when the throttle opening θ is 15% or less, the E / G retard amount is in the range of 0 ° to 40 °. And it is set so as to decrease as the throttle opening decreases. Then, the ignition signal b is transmitted to the ignition device 31. As a result, the ignition timing is controlled based on the E / G retard amount.

In this case, the throttle opening θ is 15%
In the above-described high engine speed region, the E / G retard amount is set to 40 °, and the amount of decrease in engine output is large. Thereby, shock and noise at the time of sudden start can be reduced, and abnormal wear of the clutches C1 to C3 can be suppressed. In a region where the throttle opening θ is 15% or less, the amount of decrease in the engine output is small, so that normal start can be performed without any trouble.

In the above-described embodiment, an example is described in which the amount of reduction in engine output is controlled by manipulating the amount of retard of the engine ignition timing. However, the application of the present invention is not limited to this. The reduction time of the engine output may be appropriately controlled, or both the reduction amount and the reduction time may be controlled. Further, the amount of reduction in engine output may be controlled by manipulating the amount of fuel injected from the fuel injection valve.

[0020]

[Table 2] Further, instead of the table shown in Table 1, the table shown in Table 2 can be adopted.
2 is a second embodiment according to the invention of FIG. In Table 2, when the throttle opening θ is low, the engine torque down amount is D1,
It is set to D2 for the medium opening and D3 for the high opening. However, there is a relationship of D2>D3> D1 between them.

In this case, when the throttle opening signal θ is input when the vehicle starts, in a region where the throttle opening is a medium throttle opening and the engine speed is relatively high, the torque reduction amount is the largest at D2. large. This allows
Shock and noise when starting the vehicle can be reliably reduced, and abnormal wear of the clutch can be prevented. Further, in a low engine speed region where the throttle opening is low, the amount of torque reduction is small, so that normal starting can be performed without any trouble. Further, in a high throttle opening degree region where the engine speed is high, the amount of torque reduction is smaller than that in the middle throttle opening region, so that it is possible to satisfy the driver's acceleration demand.

In this case, as a method of reducing the engine torque, in addition to controlling the retard amount of the ignition timing of the engine in the same manner as in the above-described embodiment, the method of controlling the fuel injection amount from the fuel injector is controlled. You may do so.
Further, the torque down time may be controlled in addition to the torque down amount, and both the torque down amount and the torque down time may be controlled.

[0023]

As described above, in the output control apparatus for a vehicle equipped with an automatic transmission according to the first aspect of the present invention, when the throttle opening at the time of starting the vehicle is equal to or less than a predetermined value, the engine output reduction amount or reduction time is reduced. At least one of them is small, and is decreased in accordance with the decrease in the throttle opening, so that normal start can be performed without any trouble. Further, when the throttle opening is equal to or more than a predetermined value, at least one of the engine output reduction amount and the reduction time is set to be large and constant, so that shock and noise at the time of sudden start can be reduced, There is an effect that abnormal wear of the clutch can be suppressed.

In the output control apparatus for a vehicle equipped with an automatic transmission according to the second aspect of the invention, when the throttle opening is low, at least one of the engine output reduction amount and the reduction time is reduced. Therefore, normal starting can be performed without any trouble, and when the throttle opening is a medium throttle opening, at least one of the engine output reduction amount and the reduction time is increased, so that when starting the vehicle, Shock and noise can be reliably reduced,
It is possible to prevent abnormal wear of the clutch, and when the throttle opening is a high throttle opening, at least one of the engine output reduction amount and the reduction time is larger than at the time of the low throttle opening and the medium throttle is opened. Since the opening is smaller than the opening, there is an effect that the driver's acceleration demand can be satisfied.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a Ravigneaux-type four-speed automatic transmission and a control device in a vehicle equipped with an automatic transmission according to an embodiment of the present invention.

[Explanation of symbols]

 10 automatic transmission 24 microcomputer b ignition signal θ throttle opening signal

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-60-4433 (JP, A) JP-A-3-70829 (JP, A) JP-A-3-279635 (JP, A) JP-A-1- 113562 (JP, A) Japanese Utility Model 63-193754 (JP, U) Japanese Utility Model Application 1-105736 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F02D 29/00-29 / 06 F02D 41/00-41/40

Claims (2)

(57) [Claims] 1. An output control device for a vehicle equipped with an automatic transmission, wherein the engine output is reduced or reduced when the throttle opening during a shift shift from a neutral range or a parking range to a drive range or a reverse range is equal to or less than a predetermined value. at least one of time, be reduced in accordance with the throttle opening is at least either one more small the amount of reduction or reduction time of the engine output in the case of more than a predetermined value, and the throttle opening is decreased
In addition, the throttle opening during the shift
If the engine output is less than the specified value,
An output control device for an automatic transmission, further comprising output control means for controlling an engine output so as to keep at least one of the reduction times constant . 2. An output control device for a vehicle equipped with an automatic transmission, wherein the amount of reduction in engine output when the throttle opening is low during a shift shift from a neutral range or a parking range to a drive range or a reverse range, or at least one of reduction time, reduce the amount or at least one from the small city of reduction time of the engine output when the throttle opening degree is medium throttle opening, the throttle opening is in the case of high throttle opening is at least one of reducing the amount or reduction time of the engine output, with an output control means for controlling the engine output so as to be smaller than the large a and when the in throttle opening than at the low throttle opening An output control device for a vehicle equipped with an automatic transmission.