JPS62209257A - Automatic transmission - Google Patents

Abstract

PURPOSE:To make it possible to set an accelerating condition from starting according to a driver's will, by providing means for computing a depression speed of an accelerator pedal and means for controlling an engaged condition of a clutch according to the depression speed as computed above. CONSTITUTION:A microprocessor 1 computes a depression speed of an accelerator pedal 3 from a depression distance and a depression time of the accelerator pedal 3, and controls an engaged condition of a clutch 8 according to the depression speed as computed above, thereby effecting a quick start or a slow start. In other words, when the depression speed of the accelerator pedal is high, a semi-engaged condition is shortened to effect the quick start, while when the depression speed is low, the semi-engaged condition is elongated to effect the slow start.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic transmission device for an automobile equipped with a mechanical automatic transmission. In particular, the present invention relates to an automatic transmission device that controls the connection state of a clutch in accordance with the depression speed of an accelerator pedal when starting a vehicle, thereby enabling sudden or slow starting.

[Conventional technology]

Conventionally, in mechanical automatic transmissions, when the accelerator pedal is depressed when starting the vehicle, the clutch is first engaged and transmits the drive torque from the engine to the drive wheels.

At this time, the clutch is engaged after passing through a half-clutch state so that the drive torque is transmitted smoothly and the vehicle speed changes gradually. Similarly, when the vehicle is running, the clutch is engaged and disconnected in order to switch to an appropriate gear, depending on the engine speed, vehicle speed, and amount of depression of the accelerator pedal.

[Problem that the invention seeks to solve]

However, in such conventional mechanical automatic transmissions, when starting, the clutch is gradually engaged after the accelerator pedal is depressed and the engine speed has increased to a certain degree. The connection speed is pre-programmed and
Things didn't go according to the driver's wishes.

In other words, when a sudden start was required, even if the accelerator pedal was suddenly depressed, acceleration could not be obtained and the vehicle would become limp.

The present invention solves these conventional problems,
An object of the present invention is to provide an automatic transmission device capable of controlling clutch connection according to the depression speed of an accelerator pedal.

[Means for solving problems]

The present invention includes a mechanical clutch provided on the power transmission shaft of an engine, a transmission gear provided between the mechanical clutch and the axle, and a transmission gear that controls the rotational speed of the engine, the vehicle speed, and the amount of accelerator pedal depression. In the automatic transmission device, the control means includes a means for calculating an accelerator pedal depression speed, and a control means for programmatically controlling the selection of the transmission gear and the engagement/disengagement of the clutch. and means for controlling the connection state of the clutch according to the magnitude of the depression speed.

Preferably, the accelerator pedal depression speed is calculated from the amount of depression per predetermined time, or from the elapsed time until reaching the predetermined amount of depression.

[For production]

The present invention calculates the accelerator pedal depression speed from the accelerator pedal depression amount and depression time, and controls the clutch connection state according to this depression speed to perform a sudden start or a slow start.

That is, when the accelerator pedal depression speed is high, the half-clutch state can be shortened to enable a sudden start, and when the depression speed is slow, the half-clutch state can be lengthened to enable a slow start.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, a microprocessor 1 is connected via an input/output control device 2 to a stroke sensor 4 for detecting the amount of depression of an accelerator pedal 3, which is connected to an output shaft of a transmission 5 as vehicle speed detection means. A rotational speed detection sensor 7 that detects the rotational speed of the propeller shaft 6 and a solenoid valve 10 that drives and controls an actuator 9 that connects and disconnects the clutch 8 are connected. Furthermore, a transmission position sensor 1) that detects the gear position of the transmission 5, and an engine 1
a rotation speed sensor 13 that detects the rotation speed of the engine 2; and an engine exhaust pump 14 that is linked to the accelerator pedal 3.
etc. are also connected. A mechanism for switching gears of the transmission 5 is omitted in the drawing.

Normally, when the clutch 8 is connected or disconnected, the microprocessor 1 inputs the amount of depression of the accelerator pedal 3 detected by the stroke sensor 4 and the rotation speed information of the propeller shaft 6 detected by the rotation speed detection sensor 7, and inputs the rotation speed of the propeller shaft 6. Clutch 8 so that the speed changes gradually
control the connection state of

The present invention is characterized in that it includes means for controlling the connection state of the clutch 8 in accordance with the depression speed of the accelerator pedal 3.

FIG. 2 is a diagram showing a start pattern region corresponding to the depression speed of the accelerator pedal. The horizontal axis is time t (se
c), where the vertical axis indicates the amount of depression of the accelerator pedal 3. The depression speed of the accelerator pedal 3 is calculated from the amount of depression per predetermined time, or from the elapsed time until reaching the predetermined amount of depression.

In this embodiment, the depression speed is divided into three stages: sudden start area ■, normal start area ■, and slow start area ■.
shall be.

FIG. 3 is a diagram showing the state of clutch connection control.

The horizontal axis represents time t (sec), and the vertical axis represents the connected state of the clutch.

The engagement process of the clutch 8 is controlled so that the clutch is quickly brought from the disengaged state to the half-clutch position (mode 1), and from the half-clutch position, it is slowly brought to the clutch engaged state (mode 2). This allows for a smooth start.

Here, the operation of the automatic transmission of the present invention will be explained using FIG.

The automatic transmission device of the present invention controls the timing of transition from mode 1 to mode 2 according to the depression speed (■ to ■) of the accelerator pedal 3.

In other words, when the accelerator pedal 3 is depressed rapidly (■), the clutch 8 is brought to a near-engaged position all at once.
(time tl), the transmission timing of the engine torque is advanced, and the time in mode 2 is shortened, thereby making it possible to make a sudden start.

When the accelerator pedal 3 is depressed at a normal speed (■), the clutch 8 is moved to the normal half-clutch position (time tz), and engine torque is gradually transmitted to smoothly start the vehicle.

If the speed at which the accelerator pedal 3 is depressed is even slower (■
), it is possible to delay the transmission of engine torque by shifting to mode 2 early (time t3), and to make a slow start possible by extending the time in mode 2 and transmitting the engine torque slowly. can.

In this embodiment, an example of control is shown in which the timing of transition from mode 1 to mode 2 is changed depending on the depression speed of the accelerator pedal 3, and a sudden start or a slow start is possible. The present invention can be implemented similarly by changing the speed in mode 1 or by changing the clutch engagement speed in mode 2.

〔Effect of the invention〕

As described above, the present invention can control the clutch engagement operation according to the depression speed of the accelerator pedal, so that the acceleration state from the start can be set according to the driver's intention.

That is, there is an excellent effect in that a sudden start or a slow start can be freely performed by operating the accelerator pedal.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a diagram showing a start pattern region corresponding to the depression speed of the accelerator pedal. FIG. 3 is a diagram showing the state of Sakuramochi control of the clutch. ■... Microprocessor, 2... Input/output control device, 3... Accelerator pedal, 4... Stroke sensor, 5... Transmission, 6... Propeller shaft, 7... Rotation speed Detection sensor, 8...Clutch, 9...Actuator, IO...Solenoid valve, 1)
...Transmission position sensor, 12...Engine, 13...Rotational speed sensor, 14...Injection pump. Agent: Patent attorney A Moku Ide. 4+ Embodiment of the present invention Fig. 1 Time t (sac) Fig. 2 Fig. 3

Claims (3)

[Claims] (1) A mechanical clutch installed on the power transmission shaft of the engine, a transmission gear installed between the mechanical clutch and the axle, and the rotational speed of the engine, vehicle speed, and amount of depression of the accelerator pedal are acquired. , an automatic transmission comprising control means for programmatically controlling selection of the transmission gear and engagement/disengagement of the clutch, the control means comprising means for calculating an accelerator pedal depression speed; An automatic transmission device comprising: means for controlling a clutch engagement state according to a magnitude of a depression speed. (2) The automatic transmission device according to claim (1), wherein the accelerator pedal depression speed is calculated from the depression amount per predetermined time. (3) The automatic transmission device according to claim 1, wherein the accelerator pedal depression speed is calculated from the elapsed time until reaching a predetermined depression amount.