Method and device for power supply under idling condition

Abstract

The invention discloses a power supply method and device used under idling working conditions. The method includes the step of detection and the step of power supply mode change. The detection step includes the substep that whether current working conditions of a vehicle meet idling working condition power supply conditions or not is detected. The power supply mode change step includes the substep that if the idling working condition power supply conditions are met, power generation voltage of a power generator is adjusted, so that the power generator and a storage battery supply power to an external load together, and an idling working condition power supply mode starts. Under the idling working conditions, the power generation amount of the power generator is reduced, accordingly the external load of an engine is reduced, and idling vibration in the vehicle is improved. Compared with the prior art, idling vibration in the vehicle is improved by controlling the power generation amount of the power generator, the power supply method and device are not limited by the type of gearboxes and air conditioner compressors, and the application range is wider.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a power supply method and device under idling conditions. Background technique [0002] The engine combustion excitation is the excitation generated by the periodic ignition work of each cylinder of the engine. refer to figure 1 As shown, for a single cylinder, the calculation formula of combustion torque is as follows: [0003] T=(F / cosα)·r [0004] Where F is the gas force, which is equal to the cylinder pressure multiplied by the cross-sectional area of ​​the piston. [0005] After the combustion torque of each cylinder of the engine is superimposed according to the phase difference, it is Fourier transformed, and it can be known that the energy of the combustion torque is concentrated in the main excitation frequency and its multiple frequency. According to the difference of engine structure and working stroke, the calculation formula of the main excitation frequency is as foll...

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Problems solved by technology

[0010] In order to reduce the external load of the engine, there are currently two common control technologies: one is to use the variable displacement air-conditioning compressor, which can reduce the engine load by reducing the working displacement of the air-conditioning compressor under certain conditions, but this strategy cannot It is implemented on the fixed-displacement air-conditioning compressor; the second is to enter the Neutral Idle mode through the control strategy in the driving gear of the automatic transmission (in this mode, the turbine and the planetary gear are almost completely disconnected, and the clutch only maintains a very slight engagement) , this method can reduce the gearbox load, but it cannot be applied to manual gearboxes

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