JPS6011719A - Electronic automatic transmission with braking force keeper - Google Patents

Abstract

PURPOSE:To smoothly start a vehicle uphill, by obtaining input signals from detectors and performing control synchronously with the engagement of a friction clutch. CONSTITUTION:A vehicle is equipped with various detectors which are a vehicle speed sensor 16, an accelerator pedal sensor 20a, an engine rotational frequency sensor 19a, a brake pedal switch 1a, a gear position switch 18 and a selected position switch. An electromagnetic check valve 3 for braking is provided between a master cylinder 2 and a wheel cylinder 4. A solenoid for operating the check valve 3 is controlled by the output of an electronic controller 6. The output signals of the detectors and an operating signal for a fluid actuator 10 for a clutch are synchronized with each other to put the braking check valve 3 into and out of operation.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an automatic conversion device for an automatic vehicle using an electronic control device, and in particular to a brake control system that adds a braking force retention function to a synchronized mesh automatic transmission with a friction clutch. This invention relates to an electronic automatic transmission with a power holding device.

(Prior art) When a vehicle stops and starts on a boarded road, complicated operations are required using hands and feet while coordinating the brake and accelerator, making it difficult to start smoothly. There have been problems with the so-called engine stalling and causing the vehicle to back up. This is especially difficult for female drivers and elderly people, and requires considerable skill.

Therefore, conventionally, a vehicle braking device as shown in FIGS. 1 and 2 has been devised. In this device, an electromagnetic check valve 3 is provided in a part of the oil passage leading from the master cylinder 2 of the hydraulic brake device to the wheel cylinder 4, and the switching operation of this electromagnetic check valve is performed electromagnetically. Therefore, the electric circuit of the solenoid opens and closes in conjunction with a switch that detects whether the clutch is engaged or disengaged, and a device that detects state B when a specific shift position is selected, which is related to a part of the shift position selection mechanism of the shift gear. The switch is connected in series with the storage battery. Here, to explain in detail the braking operation of the braking device according to FIG. 2, when the solenoid valve is energized, the braking oil from the mask cylinder 2 that is interlocked with the brake pedal 1 is absorbed by the other hydraulic fluid 1-3a%. Since hydraulic pressure is applied to the wheel cylinder 4 through the hydraulic pressure, the brake is operated. In this state, the hydraulic routes 3a and 3b
Since both are closed from the wheel cylinder 4 to the mask cylinder 2, the brake oil from the wheel cylinder 4 is prevented from flowing backward. That is, the braking oil pressure is maintained, and even when the brake pedal 1 is released, the brake maintains its braking state. However, when the solenoid is deenergized, the solenoid valve opens and one of the loops 3b is opened, so the retained brake oil returns to the mask cylinder 2 and the brake state is released.

When the solenoid is not energized, the braking state is not maintained and normal braking operation is performed.

(Problems with the Prior Art) In conventional vehicle braking systems, the sensors for controlling both check valves include at most a clutch engagement/disengagement state sensor and a gear shift position selection state sensor. In such cases, a simple electrical circuit configuration in which switches corresponding to each of the sensors were installed in series would have sufficed, but recent vehicles have developed sophisticated and smooth braking systems. Conventional electrical circuits are insufficient to control the device and have problems with reliability. In addition, especially in the case of electronic automatic conversion devices, when restarting from a pitch, the dry clutch is automatically controlled, so if the brake is released in the drive range, the vehicle will move backwards, which is dangerous. Ta.

(Object of the Invention) Therefore, the present invention provides a Naruko automatic transmission system having a friction clutch that can input detection signals from various detection devices of a vehicle and perform integrated control of these signals to maintain braking force. Our goal is to provide the following.

Another object of the present invention is to provide an electronic automatic conversion device that can synchronize and control the operation of a braking electromagnetic check valve and the friction clutch using an electronic control device.

(Summary of the Invention) A braking electromagnetic check valve is provided between the mask cylinder and the seven wheel cylinders that are linked to the brake pedal, and various types of electromagnetic check valves are provided in order to control the electromagnetic check valve so that the vehicle can smoothly start from a stopped state on a hill. Detecting devices of the vehicle, namely, obtaining input signals from the vehicle speed sensor, accelerator pedal sensor, clutch sensor, engine rotation sensor, brake pedal switch, gear position switch, and selector position switch, as well as synchronizing and controlling the engagement state of the friction clutch. An electronic control device is provided to enable the

(Example) Figure M5 is a configuration diagram of one embodiment of the present invention.
Items that are the same as those in the figure are indicated by the same symbols. 1 is a brake pedal, 2 is a mask cylinder, 3 is an electromagnetic check valve for braking, and 4 is a wheel cylinder, which constitute a braking device. 7 is a liquid pressure source, 8 is a tank, 9 is a solenoid valve for clutch actuator, 10 is a clutch actuator, 1
1 is a friction clutch, which constitutes a clutch device. 12 is a transmission, and the output from its output shaft is transmitted to wheels 15 via differential gears 14. Reference numeral 19 denotes an engine, which controls opening and closing of a throttle valve 19b by pressing an accelerator pedal 20 to control the engine speed. Reference numeral 6 denotes an electronic control device, which outputs an output signal from a vehicle speed sensor 16 provided on the output shaft side of the transmission, an output signal from the shift actuator 13, an output signal from the select position switch 18 of the shift lever 17, and an engine engine 9. output signals from various sensors including an output signal from an engine rotation sensor 19a provided on the accelerator pedal 20, an output signal from an accelerator pedal sensor 20a provided on the accelerator pedal 20, and an output signal from the brake pedal switch 1a provided on the brake pedal 1. By inputting the output signal and the output signal from the clutch stroke sensor tOa and synchronizing these signals, a control signal is output, and the braking electromagnetic check valve 3 is operated by the control signal, and the braking device is activated. The structure is such that it can maintain a braking force of . Here, we will explain in detail the control operation by the single control device B of the braking electromagnetic check valve 6. As is clear from the flowchart in FIG. 4, (1) the select position is the neutral position fil.
(2), the vehicle speed is at a standstill.

Stop, +31. The gear position is the lowest gear (normally 1st gear), (4), the engine is spinning and turning, (5), the accelerator pedal sensor is in the off position, and (6), the pre-sensor pedal switch is in the on position. (7) Only when the clutch stroke sensor is in the OFF position, the braking electromagnetic check valve 3 can be operated to maintain the braking state. In other words, as shown in Fig. 2 (bJ), the brake oil in the wheel cylinder 2 is prevented from flowing back into the mask cylinder 1, and the brake oil pressure is maintained, even when the brake pedal 9 is released. The brake will maintain the braking state.Next, in order to release the operating state of this electromagnetic check valve 3, it is necessary to satisfy the following conditions.That is, as is clear from FIG. , +1)
, the select position is other than the neutral position, (2), the vehicle speed is zero (vehicle stopped), (3), the gear position is the lowest gear (normally 1st
speed), and (4), the engine is in a rotating state;
These points are the same as the operating conditions of an electromagnetic check valve, but in order to restart the vehicle from a stopped state, (5), when the accelerator pedal sensor is turned on and the clutch stroke sensor is turned on, the electromagnetic check valve is activated. The check valve 5 is deactivated. As shown in Figure 84, it goes without saying that the solenoid valve 3 is deactivated when the engine stops rotating or when the vehicle speed is detected.

As described above, the present invention provides a clutch fluid pressure actuator 10 that is controlled based on an output signal from an electronic control device 6, a friction clutch 11 that is operated by this actuator, and an operating state of this friction clutch 11. A synchronized mesh type automatic change device with a friction clutch is provided, which has a clutch stroke sensor 110a that detects and inputs the detection signal to the electronic control device 6. On the other hand, the vehicle is provided with various detection devices such as a vehicle speed sensor 16, an access pedal sensor 20a, an engine rotation sensor 19a, a brake pedal switch 1a, a gear position switch, and a select position switch 18, and between the mask cylinder 2 and the wheel cylinder 4. A braking electromagnetic check valve 6 provided at The braking electromagnetic reverse valve is operated or released in synchronization with the operation signal of the clutch fluid actuator 10.

(Effects of the Invention) According to the present invention, various detection devices are provided in a vehicle, and signals from the detection devices are processed using an electronic control device to determine operating conditions and release conditions for a braking electromagnetic check valve. To quickly and accurately find out and output. In particular, since the operation of the braking electromagnetic check valve and the operation of the friction clutch can be synchronized and controlled, it is possible to smoothly restart the vehicle on the uphill slope without requiring any skill. In addition, the electronic control unit that performs this control can accurately grasp information from a large number of various detection devices and maintain the braking force of the vehicle, compared to conventional single-relay control. You can improve your performance. Furthermore, it is suitable for application to recent automatic vehicles, and the speed control device can be operated uniformly without requiring any skill, making it useful for women and elderly drivers when transporting cargo.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram for explaining a conventional vehicle braking device, FIG. 2 is an explanatory diagram of the operation of an electromagnetic check valve of the vehicle braking device, and FIG. 5 is an explanatory diagram for explaining the braking force retention according to the present invention. FIG. 4, which is an explanatory diagram for explaining the electronic automatic transmission with device, is a flowchart for explaining the operation of the solenoid valve that maintains the braking force of the transmission according to the present invention. In the figure, 1...brake pedal, 1a...brake pedal switch, 2...mask cylinder, 3...braking electromagnetic check valve, 4...wheel cylinder, 6...electronic control device , 7...pressure source, 8...tank, 9...
・Solenoid valve for clutch actuator control, 10...Clutch actuator, 11...a rubbing la sochi, 12...
・Transmission, 13...Transmission actuator, 17...
Shift lever 118...Select position switch, 19
...Engine, 20...Accelerator pedal Patent applicant: Isuy Motors Co., Ltd. Representative: Patent attorney: 1 person: Sanegai Tsuji

Claims (1)

[Claims] A clutch fluid pressure actuator (!) that is controlled based on an output signal from an electronic control device (!: detects a friction clutch operated by the actuator and the operating state of the clutch, and inputs the detection signal to the electronic control device) A synchronized mesh self-excited transmission with a four-way clutch and a clutch stroke sensor; various detection devices including a vehicle speed sensor, an accelerator pedal sensor, an engine rotation sensor, a brake pedal switch, a gear position switch, and a select position switch; a mask cylinder; A braking electromagnetic check valve is provided between the wheel cylinder and an operating coil 5 of the braking electromagnetic check valve that is controlled by the output from the electronic control device, and output signals from the various detection devices are provided. An electronic automatic transmission device with a braking force holding device, characterized in that the braking electromagnetic check valve is operated or released in synchronization with an operation signal of the clutch fluid pressure actuator.