JPH0547606U - Automatic shift control device - Google Patents

Abstract

(57) [Summary] [Purpose] The driver's will is determined from the transitional state of shifting to kickdown, the gear position after that is determined, and shift control is performed without discomfort. [Structure] When the microcomputer control device 1 determines that the kick down is performed by the kick down SW 4 shown in FIG. 1, the microcomputer control device controls so that the acceleration intended by the driver can be obtained by the depression amount of the accelerator 3 at that time. Judgment is made and a shift command is sent to the automatic shift transmission 2 to perform shift control with no discomfort and improve drivability. [Effects] According to the present invention, by performing the shift control intended by the driver, the shift can be made comfortable and the drivability is improved, and the engine speed is not increased by an extra downshift, which is economical. Is also excellent.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 When determining a kickdown, the gear is normally shifted according to the vehicle speed and accelerator opening in that state according to a shift line map stored in advance, but by using this control, the kick intended by the driver can be achieved. Down control is possible, discomfort in shifting shock due to careless kick down is eliminated, and drivability is improved.

[0002]

[Prior Art]

 According to the contents of JP-A-56-83646, the upshift line after the downshift is changed during the kickdown, but this control does not consider the determination method during the downshift, so the driver There is a possibility that an unintended downshift may occur, impairing drivability. However, according to the present invention, by controlling to determine how to perform the downshift during kick down, it is possible to shift gears closer to the will of the driver, which leads to improvement of drivability.

[0003]

[Problems to be solved by the device]

 In the past, when determining a kickdown, the gear position after the kickdown was determined by the vehicle speed and accelerator opening in that state, but this method automatically determines the gear position even if the driver does not need to accelerate suddenly. It will be downshifted.

If the downshift is two gears lower than the current gear position, a large shift shock is given to the driving vehicle, which causes discomfort.

However, by using this control, the change in the state of shifting to shock down is determined, the gear position is determined, and gear shifting is performed to perform a downshift without a feeling of discomfort and improve drivability.

[0006]

[Means for Solving the Problem] A kickdown SW is input to determine the kickdown state, and the accelerator opening stepping speed at that time is determined based on the throttle opening input signal to determine whether a sudden acceleration is required. If it is determined, the gear position is determined based on the shift line map stored in advance.

Next, when it is determined that the slow acceleration is requested, the control is performed not to the above-described control, but to shift to a gear position one step lower than the current gear position.

[0008]

[Action]

 Using the throttle sensor signal, the microcomputer captures the accelerator pedal depression amount to determine whether the driver's vehicle is requesting sudden acceleration or gentle acceleration, and shift control with no discomfort. I do.

[0009]

【Example】

 A system diagram of an automatic shift control device using a microcomputer is shown in FIG.

The structure is composed of a microcomputer control device 1, an automatic transmission 2, an accelerator 3, and a kickdown SW 4. This microcomputer control device changes the accelerator depression amount into an electric signal and takes it into the microcomputer control device 1. Depending on the amount of depression at that time, the kick-down SW4 is turned on, and the microcomputer controller 1 takes in the signal and determines that it is a kick-down (when the state of A changes to the state of B shown in FIG. 2). When the microcomputer determines that the accelerator opening degree is required based on the amount of depression, and sudden acceleration is required, the gear position is determined from the pre-stored shift line map shown in FIG. , Shift control is performed.

Next, when the amount of change in the throttle opening does not require rapid acceleration (a rapid acceleration is not required when the time change from the state A shown in FIG. 2 to the state B is not rapid). If the microcomputer determines that it is the amount of change in the throttle opening), the shift line map shown in FIG. 2 is ignored and the gear position is set one step lower than the current gear position.

In addition to the above-described means for detecting the amount of change in the accelerator, an output signal from the airflow sensor can be used as means for determining the amount of acceleration intended by the driving vehicle.

[0013]

[Effect of the device]

 If the present invention is used, the existing system can be used as it is, that is, there is no item to be added according to the present invention, so that there is no increase in cost and it is possible to perform acceleration without discomfort according to the driver's intention. It is also economical because it can improve the drivability and prevent the engine speed from rising due to extra downshifting.

[Brief description of drawings]

FIG. 1 is a system connection diagram of a microcomputer control device using the present invention.

FIG. 2 is a diagram showing a shift line map stored in advance.

[Explanation of symbols]

1 ... Microcomputer control device, 2 ... Automatic transmission, 3 ... Accelerator, 4 ... Kickdown SW.

Claims (1)

[Scope of utility model registration request] 1. An automatic shift control device using a microcomputer, wherein a shift line map stored in advance by a vehicle speed axis and an accelerator opening axis when a driver requires a rapid acceleration when determining a kickdown. The normal control to judge the gear position is carried out by, and when the driver does not need sudden acceleration,
An automatic shift control device characterized by performing a kick-down correction control for shifting to a gear one step lower than the current gear position regardless of the shift line map, instead of the above-mentioned normal control.