JPS61150841A - Automatic transmission - Google Patents

Abstract

PURPOSE:To simplify driving operation on a snarled road by enabling stating accompanying the release of a brake when an operating means for automatic stating is operated. CONSTITUTION:When an automatic start switch 33 is being pressed in, if a car is stopped and an accelerator pedal 24 is not depressed, a starting action is carried out when a brake is released. Accordingly, the operation of stepping in the accelerator pedal 24 can be omitted when starting on a snarled road. When the automatic start switch is off, an ordinary starting action can be carried out.

Description

[Detailed description of the invention]

FIELD OF THE INVENTION The present invention relates to an automatic transmission that is capable of automatically changing gear ratios, and in particular selects gears to be used by calculation means according to vehicle speed, accelerator opening, etc. The present invention relates to an automatic transmission that meshes selected gears to obtain a predetermined gear A7 ratio. K PRIOR ART In order to change the rotational speed of an automobile engine to an appropriate value, a transmission has conventionally been attached to the engine. In this transmission, the gear to be used is selected in response to the driver's gear change operation, and the engine speed is changed to an appropriate value and transmitted to the drive wheels. However, with such a conventional transmission, the driver has to operate the gear shift lever depending on the driving condition of the vehicle, etc., which makes driving operations extremely complicated. Automatic transmissions have been proposed to overcome these drawbacks. In this automatic transmission, a calculation means such as a microcontroller or a computer selects the gears to be used depending on the vehicle speed, accelerator opening, etc., and an actuator meshes the selected gears to automatically obtain a predetermined gear ratio. This is how it was done. By equipping an automobile with such an automatic transmission, there is almost no need for the driver to operate a lever to change gears. However, even in such an automatic transmission, the accelerator pedal must be depressed when starting the vehicle, and the clutch is engaged by the movement of the accelerator pedal depression to cause the vehicle to start. Therefore, when driving on a congested road or in a vehicle that starts and stops many times, such as a route bus, it is necessary to depress the accelerator pedal each time to start, and it is not always necessary to drive. The disadvantage is that the driver cannot omit complicated driving operations. KObject of the Invention The present invention has been made in view of the above-mentioned problems, and it is possible to perform a starting operation without depressing the accelerator pedal, thereby improving the driver's operation when starting. The object is to provide an automatic transmission that is simplified. K Structure of the Invention The present invention is an automatic system in which a calculation means selects a gear to be used according to vehicle speed, accelerator opening, etc., and an actuator meshes the selected gear to obtain a predetermined gear ratio. The transmission is equipped with an operating means for automatic starting and a means for causing the starting operation even if the accelerator pedal is not depressed when the brake is released, and when the operating means is operated, the brake is activated. This relates to an automatic transmission characterized in that a starting operation is performed when the transmission is released, and when driving on a congested road surface or on a route bus, etc., by operating the above-mentioned operation means. By setting the brake pedal in place, the driver can start the vehicle by simply releasing the brake without depressing the accelerator pedal.

【Example】

The present invention will be explained below with reference to an illustrated embodiment. FIG. 1 shows an engine for an automobile equipped with an automatic transmission according to an embodiment of the present invention, and this engine is composed of a diesel engine 10 for a truck. The diesel engine 10 is equipped with a fuel injection pump 11, which sequentially supplies fuel to each cylinder of the engine 10. The fuel injection pump 11 is connected to the engine 10 via the timer 12.
Moreover, the timing of fuel injection is adjusted by this timer 12. Roughly speaking, the fuel injection pump 11 is equipped with a mechanical governor 13, and the governor 13 is adapted to adjust the amount of fuel to be injected. The flywheel housing 1 is located on the back side of the engine 10.
4 is provided, and a flywheel fixed to the end of the crankshaft is accommodated within this housing 14. A clutch (not shown) is provided on the back side of the flywheel, and a transmission 15 is attached to the back side of the flywheel housing 14 so as to be connected to this clutch. This transmission 15 has an engine 10
The rotational speed of the propeller is changed to an appropriate value and transmitted to the drive wheels via the propeller shaft 16. The transmission 15 constitutes an automatic transmission, and a shift actuator 17 and a selection actuator 18 are provided above the transmission. Further, a clutch actuator 19 is mounted on the outer surface of the casing of the transmission 15 for controlling connection and disconnection of a clutch mounted on the back side of the flywheel. Roughly, a fuel control actuator 20 is provided on the front end side of the fuel injection pump 11 to control the amount of fuel supplied by adjusting the position of the control rack. These four actuators 17, 18, 19, and 20 are each driven based on instructions from the microcomputer 21 via driving means. The input side of the microcomputer 21 is connected to a control box 22 . This control box 22 is equipped with a gear shift lever 23. Furthermore, this microcomputer 21 is connected to an accelerator sensor 25 that detects the opening degree of the accelerator or the amount of depression of the accelerator pedal 24. Further, the microcomputer 21 is connected to a vehicle speed sensor 26, an engine rotation sensor 27, a rack sensor 28, and a clutch sensor 29, respectively. The vehicle speed sensor 26 is provided on the side surface of the transmission 15 and detects the vehicle speed based on the rotational speed of the output side of the transmission 15. Further, the engine rotation sensor 27 is attached to the front side of the engine 10 and is configured to detect the rotation speed of the engine 10. Moreover, the rack sensor 28 is attached to the tip side of the actuator 20, and the rack sensor 28 is attached to the tip side of the actuator 20.
The position of the control rack No. 1 is detected. Further, the clutch sensor 29 is attached to the distal end side of the clutch actuator 19, and is adapted to detect the connected and disconnected states of the clutch. Furthermore, on the input side of the microcomputer 21 constituting the calculation means of the automatic transmission according to this embodiment,
A brake switch 30 is connected. This brake switch 30 is composed of a pressure switch and is attached to the brake cylinder 31. That is, when the brake is activated, an increase in pressure within the brake cylinder 31 is detected. Roughly speaking, an automatic start switch 33 having an operation button 32 is connected to the input side of the microcomputer 21, and this switch 33 allows the start operation to be performed without depressing the accelerator pedal. Furthermore, the input side of this fixture 0':'
The engine is connected to a constant speed driving operation unit 34. 1 This unit 34 is for setting the vehicle speed for constant speed driving and for supplying information regarding the set vehicle speed to the microcomputer 21, and is provided with a set button 35 and a reset button 36, respectively. ing. Next, the operation of this automatic transmission configured as described above will be explained. This operation is performed based on a program preset in the microcomputer 21, and when the shift lever 23 of the control box 22 is in the automatic position, the shift operation is automatically performed. There is. On the other hand, when the gear shift lever 23 is in the manual position, the manually selected gear shift operation is performed by the actuator 17.1.
8. To give an overview of the operation of automatic gear shifting, the microcomputer 21 detects whether the gear shift lever 23 of the control box 22 is in the automatic position, and if it is in the automatic position, the accelerator pedal 24 is depressed at regular intervals. The amount or accelerator opening degree and vehicle speed are read from the accelerator sensor 25 and vehicle speed sensor 26, respectively. The rough micronbutton 21 reads the map stored in its memory, and based on this map,
Performs calculations to determine whether automatic gear shifting is possible. If automatic gear shifting is possible, gear shifting is performed to obtain the calculated gear ratio. On the other hand, if it is determined that automatic gear shifting is not possible, gear shifting is not performed. The specific operation of automatic gear shifting is performed by the microcomputer 21.
Based on the command, the shift actuator 17J5 and the selection actuator 1 are activated via a drive means (not shown).
8 is activated to select a gear of the transmission 15, thereby achieving meshing of the selected gear of the transmission 15. Therefore, a predetermined gear ratio can be obtained in this way. During this shift operation, the actuator 19 switches the clutch to the disconnected state, and at the same time synchronizes with the end of the shift operation, the clutch is brought into the connected state again. Furthermore, according to the automatic transmission according to the present embodiment, when driving on a congested road, or when driving a vehicle such as a route bus, in which starting and stopping are repeated alternately, the accelerator pedal 24 may be depressed. This makes it possible to start the vehicle without performing any operations. Therefore, it is possible to reduce the burden on the driver when driving on a congested road or when driving a route bus. This operation will be explained based on the flowchart shown in FIG. 2. First, the microcomputer 21 reads the output of an automatic start switch 33 having an operation button 32 for automatic start, and determines whether this switch is ON. When this switch is ON, the vehicle speed and the depression position of the accelerator pedal 24 are roughly read by the vehicle speed sensor 26 and the accelerator sensor 25. Then, it is determined whether the vehicle speed is present, that is, whether the vehicle is currently running, and if the vehicle speed is not present and the vehicle is stopped, it is determined whether the accelerator pedal 24 is being depressed. If the accelerator pedal 24 is not depressed, the brake switch 30 attached to the brake cylinder 31 detects whether the brake is operating or not, and if the brake pedal is not depressed, the microcontroller 21 supplies a control signal to the actuator 20 to move the control rack of the fuel injection pump 11 in a direction in which the amount of fuel supplied is increased. Furthermore, this microcomputer 21
A starting operation signal is output, the clutch is connected by the actuator 19, and the starting operation is performed. The feature of this operation is that when the automatic start switch 33 is pressed, the vehicle is stopped and the accelerator pedal 24
When the brake pedal is not depressed and the brake is released by releasing the brake pedal, a starting operation is performed in synchronization with the release of the brake. Therefore, if you release the brake pedal while stopped on a congested road, the vehicle will start automatically. Similarly, if the brake pedal is released after confirming that passengers have boarded and exited the bus and the doors have been closed, the bus will start automatically. Therefore, it is possible to omit the operation of depressing the accelerator pedal 24 when starting the vehicle many times. Note that when the automatic start switch 33 is OFF, a normal start operation is performed. That is, a starting operation is performed when the accelerator pedal 24 is depressed. Furthermore, when the vehicle is running and the vehicle speed is high, the clutch is connected in conjunction with depression of the accelerator pedal. Further, as is clear from the flowchart shown in FIG. 2, if the accelerator pedal is depressed prior to releasing the brake, a starting operation is performed in conjunction with the depression of the accelerator pedal. Furthermore, the above-mentioned automatic start operation without using the accelerator pedal 24 can be used in combination with a constant speed driving device, and the target vehicle speed is set in advance in the constant speed driving operation unit 34, and the set button 35 is pressed. If the set operation is performed, the actuator 20 will move as shown in FIG. 3A.
Accordingly, the accelerator opening degree is automatically controlled. Furthermore, in conjunction with this, as shown in Figure 3B, the vehicle speed increases continuously until it reaches the set vehicle speed, and after reaching a certain vehicle speed, it automatically starts traveling at that speed. Become. In this constant speed running, the microcomputer 21 compares the vehicle speed set by the constant speed running operation unit 34 and the actual vehicle speed detected by the vehicle speed sensor 26, and controls the fuel injection pump 11 based on this comparison. Rack actuator 20
This is achieved by controlling the Effects of the Invention As described above, the present invention provides an operating means for automatic starting;
means for performing a starting operation even if the accelerator pedal is not depressed when the brake is released;
When the operating means is operated, a starting operation is performed in conjunction with the release of the brake. Therefore, according to the present invention, by operating the operating means,
It is possible to start the vehicle by simply releasing the brake without pressing the accelerator pedal, making it easier to drive on congested roads. Furthermore, if applied to route buses, it becomes possible to easily perform many repeated starting operations.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an automatic transmission according to an embodiment of the present invention, FIG. 2 is a flowchart showing automatic start operation by this automatic transmission, and FIG.
The figure is a graph showing the operation in a state in which automatic start and constant speed running are combined. In addition, in the symbols used in the drawings, 15... Transmission 17... Shift actuator 18φ... One select actuator... Clutch actuator 21... Microcomputer 24... Accelerator pedal 25... Accelerator Sensor 26... Vehicle speed sensor 30... Brake switch (pressure switch) 32...
- Operation button 33: Automatic start switch.

Claims (1)

[Claims] An operation for automatic start in an automatic transmission in which a calculation means selects a gear to be used according to vehicle speed, accelerator opening, etc., and an actuator engages the selected gear to obtain a predetermined gear ratio. and means for causing a starting operation even if the accelerator pedal is not depressed when the brake is released, and when the operating means is operated, the starting action is performed in conjunction with the release of the brake. An automatic transmission characterized by: