BG112824A - Device and method for controlling the speed of vehicle - Google Patents

Abstract

(57) The device and method are intended for vehicles with internal combustion engines and for electric cars. Through them, the choice of the speed, which must be maintained is automatic. The system assists the driver of the vehicle by balancing his leg by the maintaining the accelerator, respectively the speed of the vehicle. The controlling of the speed of the vehicle is performed by the driver without having to take his leg off the accelerator pedal. The device consists of a force sensor (2), a microcontroller (12), a driver (13) and a stepper motor (7). Depending on the force that the driver applies to the accelerator pedal (3) and measured by the sensor (2), the following states are formed: - manual control - pedal movement to increase speed - manual control - pedal movement to deceleration - automatic control - maintaining the speed. 3 claims, 1 figure

Description

DEVICE AND METHOD FOR CONTROLLING THE SPEED OF THE CAR

DESCRIPTION

FIELD OF TECHNOLOGY

The invention relates to a device and method for speed control, which is used in cars with internal combustion engines and electric cars.

BACKGROUND OF THE INVENTION

In existing cruise control systems, the selection of the desired speed control is made manually by the driver via an additional button. Such a decision imposes restrictions on the use of the system. A road free of traffic jams or a road that does not pass through rugged terrain is needed. Using the cruise control function in such conditions requires the constant inclusion of the button to set a new speed, which interferes with driving rather than helping.

(US Patent 5568797, POWER CONTROL ASSISTANCE DEVICE FOR MOTOR VEHICLES).

The elimination of the manual selection of the vehicle speed setting is achieved by using an additional support pedal. The use of an additional pedal requires redesign of the original pedal or finding a suitable place to attach the additional pedal. In this case, the position of the driver's foot is changed from the traditional steering.

(Patent 66455, AUTOMATIC SPEED CONTROL DEVICE)

TECHNICAL ESSENCE

The task is to create a device and method for automatic control of vehicle speed to assist the driver in maintaining a certain speed, automatically selecting the maintained speed, minimize the driver's effort in maintaining vehicle speed without using an additional pedal.

Automatic vehicle speed control device consisting of a accelerator pedal connected by a steel wire to the throttle valve, characterized in that a force sensor is located on the accelerator pedal which is connected to a microcontroller input .

The output of the microcontroller is connected to a stepper motor driver, the outputs of the driver are connected to the stepper motor, and the shaft of the stepper motor is connected via a wire to the accelerator pedal.

The inputs of the microcontroller are also connected: a car speed sensor and a selector switch for mode selection.

Vehicle speed control method, characterized by the fact that at a pressure reported by the sensor Pmin <P <Pmax and dV / dt = 0, a command is given to switch from manual to automatic mode, and the current is set as a new speed setting. speed currently before the transition.

A method for controlling the speed of the vehicle, characterized in that at a pressure recorded by the sensor P <Pmin or P> Ptah, a command is given to switch from automatic to manual mode.

Advantage over existing technical solutions:

- Automatic selection to control the speed of the vehicle is achieved without the use of an additional pedal.

DESCRIPTION OF THE ATTACHED FIGURES fig. 1 - general scheme of the control system

EXAMPLE IMPLEMENTATION

Vehicle speed control device consisting of a pedal (3) connected by a wire (4) to the throttle valve (6), characterized in that an elastic pad (1) is mounted on the pedal, in which a sensor for power (2), which is connected to the input of the microcontroller (12). The vehicle speed sensors (11), the stepper motor shaft position sensor (9) and the mode selector switch (10) are connected to the inputs of the microcontroller (12). The outputs of the microcontroller (12) are connected to the driver (13), which controls the stepper motor (7).

OPERATING PRINCIPLE

When placing the driver's foot on the elastic pad 1 mounted on the accelerator pedal 3, a change in pressure P> 0, P <Pmin is detected by the force sensor 2. The microcontroller includes the control of the driver that powers the stepper motor and the movement of the pedal in the direction of closing the lid. This leads to an additional increase in pressure and at P> Pmin and P <Ptah the microcontroller stops the movement and this leads to fixing the pedal in a stationary state. In this condition, the driver's foot is placed in a freely stationary position on the pedal.

Manual mode.

Throttle opening.

When the pressure on the driver's side P> Ptah increases, the microcontroller (12) drives the motor (7) in the direction of pedal release (throttle opening) via the driver (13). When the force from the driver P> Pmin and P <Ptah decreases, the movement of the motor is stopped, during which the pedal is fixed together with the driver's foot placed in a stationary state.

Closing the throttle valve.

When the pressure from the driver is reduced P <Pmin and P> 0, the motor is driven in the closing direction of the valve. When the driver's foot is released on the pedal, the pressure increases to P> Pmin and P <Ptax, stopping the movement of the motor.

Switch to automatic mode.

When the driver's foot is placed on the accelerator pedal (H) and at the pressure recorded by the sensor (2) P> Pmin and P <Ptah, at dV / dt = 0 (constant speed vehicle movement), a command is given for transition from manual to automatic mode, the current speed before the transition is assumed to be the new speed reference.

Switch to manual mode.

With the driver's foot on the accelerator pedal (H) and the pressure recorded by the sensor (2) P <Pmin or P> Ptah, a command is given to switch from automatic to manual mode.

The stepper shaft position sensor (9) serves the microcontroller (12) to indicate the permissible rotation angle.

References:

. US Patent 5568797, POWER MOTOR VEHICLES .Patent 66455, CAR SPEED DEVICE)

CONTROL ASSISTANCE DEVICE FOR

FOR AUTOMATIC CONTROL HA

Claims (3)

PATENT CLAIMS Vehicle speed control device consisting of a pedal (3) connected by a wire (4) to the throttle valve (6), characterized in that an elastic pad (1) is mounted on the pedal, in which it is inserted power sensor (2), which is connected to the input of the microcontroller (12), to the inputs of the microcontroller (12) are connected the vehicle speed sensor (11), the sensor for the position of the stepper motor shaft (9) and the selector switch for mode selection (10), and the outputs of the microcontroller (12) are connected to a driver (13), which controls the stepper motor (7). 2. Method for controlling the speed of the vehicle, characterized in that at a pressure reported by the sensor Pmin <P <Pmax and dV / dt = 0, a command is given to switch from manual to automatic mode, and for a new speed setting accepts the current speed at the time before the transition. 3. Method for controlling the speed of the vehicle, characterized in that at a pressure recorded by the sensor P <Pmin or P> Ptah a command is given to switch from automatic to manual mode.