Method of controlling creep for electric vehicles

专利摘要:
A creep control method of an electric vehicle is disclosed. The creep control method of the disclosed electric vehicle includes the steps of: (a) placing a vehicle in a key on state; (b) positioning the gear position to D or R; (c) turning off the brake signal of the vehicle and generating an Excel signal of 0.85 V or more upon release; (d) driving the vehicle in a creep function; (e) when the brake signal is on, stopping the vehicle with a mechanical brake and motor command 0; (f) turning off the brake signal, generating the Excel signal to 0.85V or less, and stopping the vehicle. According to the present invention, there is an advantage that can improve the safety for the driver.
公开号:KR20030018897A
申请号:KR1020010053498
申请日:2001-08-31
公开日:2003-03-06
发明作者:이상돈
申请人:현대자동차주식회사；
IPC主号:

专利说明:

Creep control method of electric vehicle {METHOD OF CONTROLLING CREEP FOR ELECTRIC VEHICLES}
[10] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a creep control method of an electric vehicle, and more particularly, to a creep control method of an electric vehicle improved to reduce energy consumption of a main battery of a vehicle and to extend a mileage.
[11] The electric vehicle has a creep function similar to that of a normal gasoline automatic transmission vehicle. This function allows the vehicle to move forward or backward at a speed of 10 km / h, with the gear position in the D or R position and without stepping on the accelerator (hereinafter referred to as the accelerator).
[12] At this time, when the brake is applied, the vehicle stops, and when the brake is released again, the vehicle runs again.
[13] However, the general automatic transmission vehicle stops when the brake is applied, and when the brake is released again, the vehicle does not travel, but the electric vehicle runs.
[14] So if the brake light is intermittent or stops at all times, the gear position must be shifted to N or P. In electric vehicles using limited battery energy, the energy consumption of the brake lamp and the energy consumption of the brake vacuum pump are never small.
[15] Inadvertently put the gear position in the D or R position while the vehicle is stopped, and if the driver gets off the car immediately, the creep function is used to cause an accident.
[16] The present invention has been made to solve the above problems, and an object thereof is to provide a creep control method of an electric vehicle which reduces battery energy consumption and improves stability for a driver.
[1] 1 is a schematic block diagram showing a partial configuration of a system of an electric vehicle to which the creep control method of an electric vehicle according to the present invention is applied.
[2] 2 is a schematic flowchart sequentially illustrating a creep control method of an electric vehicle according to the present invention;
[3] <Description of the symbols for the main parts of the drawings>
[4] 10. Main battery
[5] 20. Inverter
[6] 30. Dish / Dish Converter
[7] 40. Motor
[8] 50. 12V battery
[9] 60. Brake vacuum pump
[17] Creep control method of the electric vehicle of the present invention for achieving the above object comprises the steps of (a) putting the vehicle in a key on (key on) state; (b) positioning the gear position to D or R; (c) turning off the brake signal of the vehicle and generating an Excel signal of 0.85 V or more upon release; (d) driving the vehicle in a creep function; (e) when the brake signal is on, stopping the vehicle with a mechanical brake and motor command 0; (f) turning off the brake signal, generating the Excel signal to 0.85V or less, and stopping the vehicle.
[18] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[19] FIG. 1 is a block diagram schematically showing a part of a system of an electric vehicle to which a creep control method of an electric vehicle according to the present invention is applied.
[20] Referring to the drawings, when the electric vehicle is started, that is, when the system is on (System On) state, the energy of the main battery (main battery) (10) is the inverter (inverter) 20 and the DC / dish converter (DC / DC Converter 30).
[21] The inverter 20 consumes energy to drive the motor 40, and the dish / dish converter 30 charges the 12V battery 50 and powers a vehicle 12V electronic device such as a headlamp or a radio. And supplies energy to operate the brake vacuum pump 60 which is the safety first. As the brake vacuum pump 60 operates, energy consumption of the main battery 10 is also the same.
[22] Referring to the operation of the creep control method of the electric vehicle according to the present invention having the configuration as described above are as follows. Here, the description of the creep control method of the general electric vehicle will be omitted, and only features of the present invention will be described.
[23] 2 is a flowchart sequentially showing a creep control method of an electric vehicle according to the present invention.
[24] As shown, the creep control method of the electric vehicle according to the present invention first puts the vehicle in a key on state (step 110). That is, the vehicle is in a running state.
[25] And position the gear position to D or R (step 120).
[26] The brake signal of the vehicle is turned off, and an accelerator signal is generated at 0.85 V or more at the time of release (step 130).
[27] The vehicle is then driven with a creep function (step 140).
[28] In addition, when the brake signal is on, the vehicle is stopped by the mechanical brake and the motor command 0 (step 150).
[29] The brake signal is turned off, an Excel signal is generated at 0.85 V or less, and the vehicle is stopped. (Step 160) At this time, unless the Excel signal is generated, the vehicle does not creep. Do not.
[30] On the other hand, in step 130, the Excel signal is generated at 0.35V at full press. And in the step (d), the creep running of the vehicle is 10km / h.
[31] As described above, the creep control method of the electric vehicle according to the present invention, after receiving the Excel command temporarily during the creep function to be performed, it is possible to drive the Excel without stepping after driving.
[32] As described above, the creep control method of the electric vehicle according to the present invention has the following effects.
[33] Conventionally, driving is performed regardless of the driving of the Excel, so if the vehicle does not step on the brake, the vehicle may run immediately. However, the present invention may reduce the frequency of use of the brake pump by not stepping on the Excel after driving.
[34] Therefore, the energy consumption of the main battery can be reduced, and the mileage can be extended.
[35] And the driver's safety can be improved.
[36] Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

权利要求:
Claims (3)
[1" claim-type="Currently amended] (a) placing the vehicle in a key on state;
(b) positioning the gear position to D or R;
(c) turning off the brake signal of the vehicle and generating an Excel signal of 0.85 V or more upon release;
(d) driving the vehicle in a creep function;
(e) when the brake signal is on, stopping the vehicle with a mechanical brake and motor command 0;
(f) turning off the brake signal, generating the Excel signal to 0.85V or less, and stopping the vehicle.
[2" claim-type="Currently amended] The method of claim 1, wherein in step (c)
The Excel signal is a creep control method of an electric vehicle, characterized in that to generate a 0.35V at full press.
[3" claim-type="Currently amended] The method of claim 1, wherein in step (d)
Creep control of the vehicle is a creep control method of an electric vehicle, characterized in that 10km / h.

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同族专利:

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公开号 | 公开日

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KR100440118B1|2004-07-12|

引用文献:

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公开号 | 申请日 | 公开日 | 申请人 | 专利标题

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法律状态:
2001-08-31|Application filed by 현대자동차주식회사

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2001-08-31|Priority to KR10-2001-0053498A

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2003-03-06|Publication of KR20030018897A

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2004-07-12|Application granted

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2004-07-12|Publication of KR100440118B1

优先权:

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申请号 | 申请日 | 专利标题

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KR10-2001-0053498A|KR100440118B1|2001-08-31|2001-08-31|Method of controlling creep for electric vehicles|