JPS62278349A - Electronic controller for automatic speed change gear - Google Patents

Abstract

PURPOSE:Make it possible to compensate secular change in the coefficient of friction for the clutch and the brake of a speed change mechanism by determining electromagnetic solenoid duty ratio at the time of speed change according to vehicle running states both before the said speed change and at the time of past speed change. CONSTITUTION:Information 1 on a vehicle running state such as vehicle speed, the input-output number of revolutions of a speed change gear, and throttle opening is converted into a signal 3 for the vehicle running state in a detecting circuit 2 for the vehicle running state, and a judging circuit 4 for speed change range determines the speed change rarge on the said signal 3. In addition to that, a speed change range signal 5 determined by the judging circuit 4 for the speed change range is sent with the signal 3 for the vehicle running state into a determining means 7 for speed change solenoid on-off duty ratio, which determines the duty ratio according to the vehicle running states both at the time of past vehicle speed change and at present. Thus, a hydraulic circuit 10 is controlled through an eleotromagnetic solenoid driving part 6 according to a duty ratio signal 8 to control a speed change mechanism 11.

Description

DETAILED DESCRIPTION OF THE INVENTION 3. Detailed Description of the Invention Technical Field The present invention relates to an automatic transmission electronic control system, and more particularly to an automatic transmission line electronic control system for automobiles that is applied to vehicles equipped with an automatic transmission.

Prior Art Conventionally, in this type of automatic transmission electronic control device for automobiles, as a method to avoid shocking torque fluctuations during gear shifting, during a transient state of gear shifting, the electromagnetic solenoid drive output signal for gear shifting is controlled to It outputs a special predetermined pattern that is not used during steady driving, and selects an intermediate gear ratio to reduce torque impact during gear changes.

The conventional method described above outputs a predetermined special pattern to the shift solenoid during gear shifting, but it cannot cope with changes over time in the friction coefficient of the clutches and brakes that are responsible for torque transmission, and does not produce sufficient torque impact. Can't be avoided.

OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to provide an automatic transmission mechanism for automobiles that can reduce shocking torque fluctuations during gear shifting.
11 devices.

Structure of the Invention According to the present invention, a vehicle running state detection circuit that generates a vehicle running state signal according to a vehicle running state, an electromagnetic solenoid that operates in response to the vehicle running state signal, and a circuit that is controlled by the electromagnetic solenoid. A shift R electronic control device for an automobile, comprising a hydraulic circuit and a shift I driven by the hydraulic circuit, and supplies a repeating ON/OFF signal to the electromagnetic lens during a certain period during a shift transient state. hand,
There is obtained an automatic transmission electronic control device for an automobile, characterized in that the duty ratio of the on/off repetition signal is determined according to the current vehicle running state and changes in the vehicle running state during past gear changes.

Embodiment Next, the present invention will be explained in more detail with reference to the drawings showing an embodiment of the present invention.

Referring to FIG. 1, in one embodiment of the present invention, a vehicle running state detection circuit 2 converts vehicle running state information 1 such as vehicle speed, input/output rotation speed of a transmission, and throttle opening into a vehicle running state signal. change. More specifically, this vehicle running state information 1 includes vehicle running speed, transmission input/output shaft rotation, accelerator distance, radiator water temperature, and other state information. A vehicle running state signal 3 from the vehicle running state detection circuit 2 is sent to a gear position determination circuit 4 to determine the gear position. The gear position signal 5 from the gear position determination circuit 4 is sent to the gear change solenoid on/off duty ratio determining means 7 together with the vehicle running state signal 3. This shift solenoid on/off duty ratio determining means 7 determines the duty ratio according to the vehicle running state at the time of the past vehicle shifting and the current vehicle running state.

The electromagnetic solenoid on/off duty ratio signal 8 determined in this manner is sent to the electromagnetic solenoid drive unit 6. The electromagnetic solenoid drive section 6 generates an electromagnetic on/off signal @9 according to the current and past vehicle running conditions, and supplies it to the hydraulic circuit 10. The hydraulic circuit 10 drives the speed change mechanism 11 to perform a speed change operation of the vehicle.

As described in detail, the present invention is configured to determine the electromagnetic solenoid duty ratio during gear shifting based on the vehicle running state before shifting and the vehicle running state during past gear shifting.
1 of the clutch and brake of the transmission mechanism! ! It has the effect of absorbing changes in the friction coefficient over time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention. Explanation of symbols of main parts 2... Vehicle running state detection circuit 4... Gear stage determination circuit 6... Electromagnetic solenoid drive section 7... Gear shift solenoid on /Off-duty determining means

Claims (1)

[Claims] A vehicle running state detection circuit that generates a vehicle running state signal according to the vehicle running state, an electromagnetic solenoid that operates in response to the vehicle running state signal, a hydraulic circuit controlled by the electromagnetic solenoid, and the hydraulic circuit. A transmission electronic control device for an automobile, comprising a transmission driven by the user, and supplies a repetitive ON/OFF signal to the electromagnetic solenoid during a certain period during a shift transient state, the electronic control device comprising: An automatic transmission electronic control device for an automobile, characterized in that a duty ratio is determined according to a current vehicle running condition and a change in the vehicle running condition during a past shift.