Ramp starting method of electric drive tramcar for preventing sliding on ramp

A hill start, electric drive technology, applied in the direction of electric vehicles, control drive, electric energy management, etc., to achieve the effect of convenient on-board debugging

Inactive Publication Date: 2013-01-02
SANYI ROBOT TECH CO LTD
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  • Abstract
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Problems solved by technology

However, this kind of method needs to add redundant mechanical parts and modify the internal mechanical structure of the car. This method has complicated manufacturing process and increases the processing cost. The second is to design the electronic parking system. This method requires the use of electronic control units and more sensors. , such as longitudinal acceleration sensors, slope sensors, and brake pedal displacement sensors, there are many electronic components, complex coordination, high failure rate, and low sensor accuracy, which is prone to errors

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  • Ramp starting method of electric drive tramcar for preventing sliding on ramp

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Embodiment Construction

[0023] A kind of electric drive mine car ramp start method that prevents the slope of the embodiment of the present invention, comprises the following steps:

[0024] Step 1, such as figure 1 As shown in , the estimated gravity component Gsinθ when the vehicle is driving on a slope is calculated by the following formula 1,

[0025] F-(Gsinθ+f)=ma (1),

[0026] Where F is the motor torque, G is the gravity of the vehicle, θ is the gradient of the ramp, f is the resistance, m is the mass, and a is the acceleration;

[0027] The motor torque F is the force obtained by motor control, which is a known force and can be obtained through existing vehicle equipment; the preferred acceleration a is measured by the speed sensor; the resistance f is about 2% of the vehicle weight; it can be calculated from the known quantities above Get the gravity component Gsinθ of the vehicle along the ramp.

[0028] In the embodiment of the present invention, the corresponding relationship betwee...

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Abstract

The invention provides a ramp starting method of an electric drive tramcar for preventing sliding on a ramp, and belongs to the technical field of engineering machinery. The ramp starting method comprises the following steps of: calculating an estimated gravity component Gsin theta when a vehicle travels on the ramp through a formula: F-(Gsin theta+f)=ma, wherein F is motor torque; G is gravity of the vehicle; theta is gradient of the ramp; f is resistance; m is mass and alpha is acceleration; calculating drive force required when the vehicle starts on the ramp, wherein the drive force is greater than 0.9-1.2 times of estimated gravity component. An additional sensor does not need to be added; the motor drive force with certain accuracy is calculated out by equipment of the vehicle; a certain car sense of a driver is ensured, and the vehicle does not slide on the ramp, thereby playing a starting-assisting function.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a method for starting an electric-driven mine car, in particular to a method for starting an electric-driven mine car on a ramp to prevent slippage. Background technique [0002] When the vehicle starts on a slope, the brake pedal and the drive pedal need to act together, that is, the clutch and the brake need to be in a semi-linked state. The semi-linkage state requires the driver to adjust according to the load of the car and the size of the ramp. For unskilled drivers, poor cooperation will cause the vehicle to slip or stall. [0003] Before the present invention, the inventor found that the prior art had at least the following problems: at present, there are mainly two types of anti-rolling methods for vehicle ramps with traditional mechanical transmission. The one is to realize anti-rolling by transforming the internal mechanical structure of the automobile. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCY02T10/72
Inventor 王建明戚烈
Owner SANYI ROBOT TECH CO LTD
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