阅读说明：本技术 一种电动汽车prnd档位控制方法 (PRND gear control method for electric vehicle ) 是由 阎全忠 潘世林 *** 江运宝 王世强 于 2020-07-02 设计创作，主要内容包括：本发明属于汽车技术领域,具体涉及一种电动汽车PRND档位控制方法,TCU提示档位严重故障或驾驶员发现档位控制不灵时,包括如下步骤：(1)驾驶员双敲击中控触摸屏,以禁用换挡控制器并唤醒弹出档位操作区,所述档位操作区用于替代PRND档位控制装置的操作；(2)驾驶员通过所述档位操作区传递的转换档位的意图信号；(3)TVCU接受到驾驶员传递的意图信号后,判断目标档位是否为允许档位；(4)TVCU判断从当前档位转换为目标档位是否允许操作；(5)提示不合理的操作；(6)执行符合设定规则的换挡操作；(7)下电前,档位设置为P档。本发明能在档位信号发生器电路发生损坏,进行应急安全驾驶。(The invention belongs to the technical field of automobiles, and particularly relates to a PRND gear control method for an electric automobile, wherein when a TCU prompts a serious gear fault or a driver finds that gear control is not available, the PRND gear control method comprises the following steps: (1) a driver double-strikes the hit-control touch screen to disable the gear shift controller and wake up a pop-up gear operation area, wherein the gear operation area is used for replacing the operation of the PRND gear control device; (2) the intention signal of the driver for shifting gears is transmitted through the gear operating area; (3) after receiving an intention signal transmitted by a driver, the TVCU judges whether a target gear is an allowable gear; (4) the TVCU judges whether the operation is allowed or not when the current gear is switched to the target gear; (5) prompting unreasonable operation; (6) executing a gear shifting operation according with a set rule; (7) before powering down, the gear is set as P gear. The invention can carry out emergency safe driving when the circuit of the gear signal generator is damaged.)

1. A PRND gear control method for an electric vehicle is characterized by comprising a PRND gear control device, a central control touch screen, a vehicle control unit, a gear shifting controller and a clutch gearbox assembly;

the central control touch screen is a touch screen which is arranged on a central control platform of a cab and is used for interaction between a vehicle and a driver, can display information to the driver, and can collect instructions of the driver to the vehicle control unit through corresponding clicking and sliding gesture operations of the driver on the touch screen;

when the TCU prompts a serious gear fault or a driver finds that gear control is not available, the control method of the PRND gear comprises the following steps:

(1) a driver double-strikes the hit-control touch screen to disable the gear shift controller and wake up a pop-up gear operation area, wherein the gear operation area is used for replacing the operation of the PRND gear control device;

(2) the intention signal of the driver for shifting gears is transmitted through the gear operating area;

(3) after the TVCU or the TCU receives an intention signal transmitted by a driver, judging whether a target gear is an allowable gear;

(4) the TVCU or the TCU judges whether the operation is allowed or not when the current gear is switched to the target gear;

(5) prompting unreasonable operation;

(6) executing a gear shifting operation according with a set rule;

(7) before powering down, the gear is set as P gear.

2. The electric vehicle PRND gear control method of claim 1, wherein the gear operating zones comprise park P, reverse R, neutral N, and drive D.

3. The method of claim 1, wherein the PRND range control device is an electronic shift-by-wire, and the shift-by-wire is lever, knob, or button.

4. The PRND gear control method of claim 1, wherein the vehicle controller is an intelligent unit performing communication management, energy management and drive management functions.

5. The method of claim 1, wherein the clutch transmission assembly is a mechanism that performs drive train make and break and speed ratio.

6. The method of claim 1, wherein the shift controller is an intelligent unit that performs target gear (ratio) decision making, actuator control, fault diagnosis and fault handling.

Technical Field

The invention belongs to the technical field of automobiles, and particularly relates to a PRND gear control method for an electric automobile.

Background

The transmission gear shift operating mechanism is transited from a manual gear to an automatic gear, although the forward 12345 gears are automatically switched, the forward D gear, the reverse R gear, the parking P gear and the neutral N gear are still switched by manually shifting a gear shift lever structure. Because the gear level structure is bulky, occupy more cockpit space, make originally the control console of local and prosperous, can't arrange more functions, at present progressively develop into drive-by-wire selector. The wire control gear shifter has various forms such as an operating lever type, a knob type, a button type and the like. The knob type also comprises an end point and an end-free point, and the periphery of the button with the center of P gear is arranged in an end-free point DNRN circulating mode. The misoperation and the gear misuse can lead to the damage of the vehicle if the vehicle is in a light state and the damage of the vehicle and the death of people if the vehicle is in a heavy state. Thus, patent application 201910239677.3 sets the D-range and R-range engagement conditions for vehicle speed and brake signals; patent application 201711174142.X specifies allowed gears and allowed gear changes by using satellite positioning and dividing scenes such as starting, congestion, climbing and the like; patent application 201710245120.1 even considers the technical problem of how to easily return to the standby position after the vehicle is stopped, sets the gear to P gear through the middle button, and the outer ring can only be N gear when pressing. All the above strategies require the gear operating device to correctly generate corresponding signals and reliably transmit the signals to the TCU, or a TVCU integrating the TCU and the VCU into a whole, however, under the condition that a gear signal generator circuit is damaged, the gear operating device cannot transmit driving intention to the TCU, emergency driving is carried out, and deep research is not available.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a PRND shift control method for an electric vehicle, which can perform emergency driving without transmitting driving intention to the TCU through a shift operation device when a shift signal generator circuit is damaged.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a PRND gear control method for an electric vehicle comprises a PRND gear control device, a central control touch screen, a vehicle control unit, a gear shifting controller and a clutch gearbox assembly;

the central control touch screen is a touch screen which is arranged on a central control platform of a cab and is used for interaction between a vehicle and a driver, can display information to the driver, and can collect instructions of the driver to the vehicle control unit through corresponding clicking and sliding gesture operations of the driver on the touch screen;

when the TCU prompts a serious gear fault or a driver finds that gear control is not available, the control method of the PRND gear comprises the following steps:

(1) a driver double-strikes the hit-control touch screen to disable the gear shift controller and wake up a pop-up gear operation area, wherein the gear operation area is used for replacing the operation of the PRND gear control device;

(2) the intention signal of the driver for shifting gears is transmitted through the gear operating area;

(3) after the TVCU or the TCU receives an intention signal transmitted by a driver, judging whether a target gear is an allowable gear;

(4) the TVCU or the TCU judges whether the operation is allowed or not when the current gear is switched to the target gear;

(5) prompting unreasonable operation;

(6) executing a gear shifting operation according with a set rule;

(7) before powering down, the gear is set as P gear.

Specifically, the gear operating regions include a parking gear P, a reverse gear R, a neutral gear N, and a drive gear D.

Specifically, the PRND shift control device is an electronic shift-by-wire, and the shift-by-wire is an operation lever type, a knob type or a button type.

Specifically, the vehicle control unit is an intelligent unit for performing communication management, energy management and drive management functions.

Specifically, the clutch transmission assembly refers to a mechanism for executing on-off and speed ratio of a transmission chain.

Specifically, the gear shift controller is an intelligent unit for performing target gear (speed ratio) decision, actuator control, fault diagnosis and fault processing.

Compared with the prior art, the invention can carry out emergency driving under the condition that the circuit of the gear signal generator is damaged and the driving intention cannot be transmitted to the TCU through the PRND gear control device, thereby avoiding driving danger and improving safety.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates an example of a TVCU confirmation fault display and emergency gear control touch screen setting;

FIG. 2 is a schematic view of a driver shift control.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

Since the basic operation structure and operation principle of the electric vehicle are well known to those skilled in the art, they are not described in detail herein.

Specific embodiments of the present invention will be described in detail below with reference to fig. 1-2.