JPS63195456A - Automatic transmission device for gear transmission - Google Patents

Abstract

PURPOSE:To promote the improvement of fuel consumption and acceleration characteristic, by providing an external signal setter, in which the driver enables an output signal, able to be added to and subtracted from a vehicle speed signal, to be optionally set and output, so that the driver can select a speed change point by his will. CONSTITUTION:A CPU5e in a control unit 5 reads a car speed from a car speed sensor 2 and an accelerator opening from an accelerator opening sensor 3, subsequently reading a set signal in an external signal setter 4. Next the CPU5e, if a select bar 11 is placed in a D range (drive position), performs virtual car speed calculation, determining a speed change point from this car speed and the input accelerator opening being based on an automatic speed change diagram and generating a speed change instruction signal to a shift actuator 6 and a select actuator 7, and a gear transmission 1 changes its gear meshing by actuating each solenoid valve of the actuators 6, 7 and each hydraulic cylinder.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an improvement of an automatic transmission in a gear type transmission, and particularly relates to an automatic transmission in which the selection of shift points can be made according to the will of the driver. It is.

(Prior art and its problems) Conventionally, in an automatic transmission device for a gear transmission, automatic shifting is performed by electronic control based on an automatic shifting diagram as shown in FIG. 4, for example. , the solid line in the figure is an automatic transmission diagram during upshifting, and the broken line is an automatic transmission diagram during downshifting.

In the figure, A, B, C, D, and E indicate a first speed region, a second speed region, a third speed region, a fourth speed region, and a fifth speed region, respectively. Now, when the accelerator opening degree shown on the vertical axis and the vehicle speed (kfl/h) shown on the horizontal axis are changing along the straight line R in the figure, when the vehicle accelerates, if the point a1 is exceeded, the automatic shift will occur. The shift actuator and select actuator that make up the device operate, and the meshing of the gear transmission automatically shifts up from 1st gear to 2nd gear, and if point b1 is exceeded, it also shifts from 2nd gear to 2nd gear. It is shifted up to 3rd gear. Conversely, when downshifting, when point b is exceeded, the gear is automatically downshifted from third gear to second gear, and when point a is exceeded, the gear is automatically downshifted from second gear to first gear.

The automatic transmission diagram shown in FIG. 4 is stored in advance in the control unit of the automatic transmission, and is based on the accelerator opening signal from the accelerator opening sensor, which can be separately input to the control unit, and the vehicle speed sensor. Based on the input vehicle speed signal, a shift point based on such an automatic shift diagram is determined in the control unit, and a shift command signal is issued to the shift actuator, select actuator, etc. attached to the gear transmission. It had a structure.

In this way, in the conventional structure, the shift points were set constant based on a preset automatic shift diagram, so some drivers may shift at a different shift point than their intention. There have been problems in that the acceleration characteristics desired by the driver cannot be obtained and fuel-saving driving cannot be achieved.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and it is an object of the present invention to provide an automatic transmission device for a gear transmission in which the shift points can be changed according to the driver's will. The purpose is to determine a shift point according to a pre-stored automatic shift diagram based on an accelerator pedal depression signal that can be fully input from an accelerator opening sensor and a vehicle speed signal that can be fully input from a vehicle speed sensor. In an automatic transmission device for a gear transmission equipped with a control unit that issues a shift command signal to an actuator that selects a meshing position of the gear transmission, the driver can arbitrarily set and output an output signal that can be added to or subtracted from the vehicle speed signal. The vehicle is equipped with an external signal setting device capable of controlling the vehicle, and is configured to calculate an apparent vehicle speed within the control unit based on an output signal from the external signal setting device, and to determine a shift point based on the vehicle speed. That's true.

(Function) When the driver sets the external signal setting device to any position according to his/her preference, the output signal set from the external signal setting device is input into the control unit, and this external signal is input into the control unit. The output signal from the setting device and the vehicle speed signal input from the vehicle speed sensor are added together to calculate the apparent vehicle speed, and based on this calculated vehicle speed, the automatic A shift command signal is issued to the actuator that determines the shift point according to the shift diagram and selects the meshing position of the gear transmission, so an upshift or downshift can be achieved earlier or later than the pre-stored shift point. This allows the driver to obtain shift points according to his/her wishes.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 shows a schematic diagram of the automatic transmission of a gear transmission, and Figure 2 shows the configuration of the control unit in the equipment.
FIG. 3 shows a control program within the control unit.

In the figure, a gear-type transmission 1 connected to an engine E
The gear transmission 1 includes a shift actuator 6 and a select actuator 7 that are a set of hydraulic cylinders that can change the meshing position of the gears in the gear transmission 1, and a set of hydraulic cylinders that can connect and disconnect the clutch that is interposed between the engine E and the gear transmission 1. A clutch actuator 8 is provided, and the engine E
is provided with a throttle actuator 10 that can adjust the opening degree of the throttle. The shift actuator 6 can change gears in the shift direction shown in FIG. 5, and the select actuator 7 can change gears in the select direction shown in FIG.

These shift actuator 6, select actuator 7, clutch actuator 8, and throttle actuator 10 are structured to operate based on command signals from a control unit 5 that can be configured with a microcomputer. It is configured so that signals from the sensor 2, the accelerator opening sensor 3, the external signal setting device 4, the select lever 11, and the engine rotation sensor 9 are input.

The select lever 11 is installed in the vehicle interior and is selected to a position such as reverse or drive based on the driver's intention. A contact switch is provided at each select position such as drive or reverse. A select position signal from the switch is input to the control unit 5. Further, the accelerator opening sensor 3 detects the amount of depression of the accelerator pedal by the driver, and is constituted by a potentiometer or the like, and the accelerator opening is input into the control unit 5.

Further, an engine rotation sensor 9 is installed on the crankshaft of the engine E, and inputs the rotation speed of the crankshaft to the control unit 5. Further, a vehicle speed sensor 2 is provided on the output shaft of the gear transmission mechanism and inputs the vehicle speed to the control unit 5. Further, the throttle actuator 10 is constituted by a stepping motor and is connected to a throttle valve shaft, so that the throttle valve can be opened and closed by rotation of the stepping motor.

The shift actuator 6, select actuator 7, and clutch actuator 8 each include a hydraulic cylinder and a solenoid valve that drives the hydraulic cylinder, and each solenoid valve is activated based on a command signal from the control unit 5. Each cylinder is operated by switching the hydraulic boat ON, OFFFL, and solenoid valves.

The control unit 5 has a structure as shown in FIG. 2, and includes a pulse input circuit 5a that inputs pulse signals from the vehicle speed sensor 2 and the engine rotation speed sensor 9, and a pulse input circuit 5a that inputs pulse signals from the accelerator opening sensor 3 and an external circuit. Analog input circuit 5 that inputs analog signals from signal setting device 4
b, a contact input circuit 5c for inputting the selected position from the select bar 11, a CPU 5e composed of, for example, an 8-bit microcomputer, and a step motor for outputting a drive command signal to the throttle actuator unique 10. It mainly consists of a drive circuit 5r and an electromagnetic valve drive circuit 5g that outputs operation command signals to the clutch actuator 8, shift actuator 6, and select actuator 7, and the analog input circuit 5b uses an AD:I inverter. The input signal is converted into a digital signal and inputted to the CPU 5e, and furthermore, the contact input circuit 5c is converted to a digital signal and inputted to the CPU 5e.
The structure is such that a contact input signal is supplied to U5e.

In addition, the external signal installation device 4 in this example is installed in a position in the vehicle interior that is easy for the driver to operate, and the driver can manually change the volume etc. and set it to any position. ing.

In such a structure, the CPU 5e stores an automatic shift diagram that can determine the shift points as shown in FIG. Calculations are performed at , and an operation command signal for the actuator 6.7.8 is appropriately issued to the outside. For example, when a shift command is issued based on an automatic shift diagram, first the throttle actuator 1 is
0, a command is issued to operate the engine throttle in the closing direction, the engine speed decreases due to the operation of the throttle actuator 10, and just before the vehicle shifts from the acceleration state to the coasting state (the input signal from the engine rotation sensor 9 ), a command signal to disengage the clutch is issued to the clutch actuator 8, and the clutch actuator 8 is operated to disengage the clutch. Thereafter, a shift command is issued to the shift actuator 6 and the select actuator 7 based on the automatic shift diagram.
The shift actuator 6 and the select actuator 7 operate alternately to shift the gears to a predetermined gear position and change the speed. Thereafter, a close reading command is issued to the clutch actuator 8, and the clutch actuator 8 is operated to connect the clutch. At the same time, a command is issued to the throttle actuator 10 to open the throttle position to a position that matches the amount of depression of the accelerator pedal (according to the input signal from the accelerator opening sensor 3), and the throttle position is adjusted. Such an operation command is issued every time the gear is changed, and the gear shifting operation is performed in the same flow as the operation normally performed by a driver when changing gears.

Incidentally, the shift command signals to the shift actuator 6 and the select actuator 7 in this example are performed according to the program shown in FIG.

That is, the CPU 5e in the control unit 5 has
The vehicle speed (VsP) from the vehicle speed sensor 2 and the accelerator opening (TH) from the accelerator opening sensor 3 are read (step 1), and then the setting signal (MY) from the external signal setting device 4 is read.
) is read (step 2), and then it is determined whether the select lever 11 is in the D range (drive position) (step 3). If the select lever 11 is in the D range (drive position), then the CPUSc calculates the apparent vehicle speed (VSP=Vsp+MV)
is performed (step 4). Next, based on the apparent vehicle speed (VSP) calculated above and the accelerator opening PH fully input in step 1, a shift point is determined based on the automatic shift diagram shown in FIG. 4 (step 5), and the shift point is determined based on the automatic shift diagram shown in FIG. A shift command signal is issued to the actuator 6 and select actuator 7 (step 6), and each electromagnetic valve of the shift actuator 6 and select actuator 7 is activated, each hydraulic cylinder is activated, and the meshing of the gears of the gear transmission 1 is changed. be done.

Further, when it is determined in step 3 that the select lever 11 is located at a select position other than the D range, the CPU 5e issues a drive command to the shift actuator 6 and select actuator 7, such as selecting a reverse gear. In step 7), a signal is generated, and the shift actuator 6 and select actuator 7 are operated, and the gears are brought into mesh with each other in the reverse position.

In this example, for example, +5kTI from the external signal setting device 4.
When the output signal for IZh is output to the control unit 5, assuming that the actual running speed of the vehicle according to the vehicle speed sensor 2 is 50 knl/h, the CPUSc calculates an apparent value of 55 kT11/h by the calculation in step 4 of FIG. 4, a shift point is determined based on the automatic shift diagram shown in FIG. 4, and a shift command signal is output to the shift actuator 6 and select actuator 7. Therefore, the upshift is performed 5-/h earlier than the automatic shift diagram shown in FIG. 4 which is fully stored in the CPUSe.

Similarly, the driver sets the external signal setting device 4 to -5117Il/h.
When the setting is shifted by 5 km/h, the output signal for -5 km/h can be input to the CPU 5e, and the automatic shift diagram is 5 km/h.
Upshifting is performed at a late stage of ltl/h.

Further, when the output signal of the external signal setting device 4 is 0 ktn/h, a shift point along the normal automatic shift diagram is selected and output.

As described above, in this example, by installing the external signal setting device 4 in the vehicle interior, it is possible to set the external signal setting device 4 to any position according to the driver's wishes. The shift point based on the stored automatic shift diagram can be changed to a desired position, the desired shift point can be selected, and acceleration etc. can be obtained according to the driver's preference.

(Effects of the Invention) The automatic transmission device for a gear transmission according to the present invention receives an accelerator pedal depression amount signal input from an accelerator opening sensor;
Based on the vehicle speed signal that can be input from the vehicle speed sensor,
In an automatic transmission device for a gear transmission, the automatic transmission device includes a control unit that determines a shift point according to a pre-stored automatic shift diagram and issues a shift command signal to an actuator that selects a meshing position of the gear transmission. The control unit includes an external signal setting device that allows the driver to set and output an output signal that can be added or subtracted, and calculates the apparent vehicle speed within the control unit based on the output signal from the external signal setting device. By configuring the shift point to be determined based on the vehicle speed, the shift point can be changed based on the automatic shift diagram stored in advance in the control unit, and the desired shift point can be set according to the driver's will. It has the effect of being able to be selected and expected to improve fuel efficiency and acceleration.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a schematic configuration diagram of an automatic transmission of a gear transmission, Fig. 2 is a block diagram of the configuration of the control unit in Fig. 1, and Fig. 3 is a block diagram of the control unit in Fig. 2. CP of
A flowchart diagram showing a control program in U,
Figure 4 is an automatic transmission diagram stored in advance in the CPU;
The figure is a shift direction diagram showing a shift direction and a select direction. E...Engine 1...Gear transmission 2...
・Vehicle speed sensor 3...Accelerator opening sensor 4...External signal setting device 5...Control unit 6...Shift actuator 7...Select actuator 8...Clutch actuator 9...Engine rotation sensor 10...Throttle actuator 11...Select train/<-5e-CPU patent applicant
Aichi Kikai Kogyo Co., Ltd. agent Yoshihisa Shimizu, patent attorney Drawing No. 2 (No later drawing) -L (Km/1-1) Figure 4

Claims (1)

[Claims] Based on the accelerator pedal depression signal input from the accelerator opening sensor and the vehicle speed signal input from the vehicle speed sensor, the shift point is determined according to a pre-stored automatic shift diagram, and the meshing position of the gear transmission is determined. In an automatic transmission device for a gear transmission equipped with a control unit that issues a shift command signal to an actuator that selects an actuator, an external signal setting device that allows a driver to arbitrarily set and output an output signal that can be added to or subtracted from the vehicle speed signal. A gear, characterized in that the apparent vehicle speed is calculated within the control unit based on the output signal from the external signal setting device, and the gear shift point is determined based on the vehicle speed. Automatic transmission device.