A start control method and system for a range extender

Abstract

The invention discloses a starting control method for a range extender, which includes detecting the actual rotational speed and actual current of a generator, and obtaining the target rotational speed and target current of the generator according to the received starting control request; according to the target rotational speed and the Calculate the actual rotational speed to obtain the output torque of the generator; calculate and obtain the corrected torque of the generator according to the target current and the actual current; perform weighting processing on the output torque and the corrected torque to obtain the final output torque of the generator; The torque of the generator is controlled and adjusted with the final output torque as a target torque. The invention can optimize the starting control of the range extender, improve the starting efficiency of the generator and reduce the starting time of the range extender, so as to maximize the electric advantage and achieve the purpose of quickly starting the engine.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a method and system for controlling the start of a range extender. Background technique [0002] The range extender carried by the existing range-extended electric vehicle is composed of a generator and an engine, and the generator and the engine are connected through a set of single-stage reducer, and the generator and the engine are mechanically connected. In this electromechanical system, the stable power generation is obtained through the closed-loop control of the generator speed and the closed-loop control of the engine torque. When the range extender needs to be started, the target speed command is sent to the generator. After the generator drives the engine to reach the target speed, the engine injects fuel and ignites to complete the start. However, the inventors of the present invention have found in their research that during the start-up process, since the...

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Problems solved by technology

[0003] The invention provides a method and system for controlling the start of a range extender to solve the technical problem that the existing range extender starts with only the speed control variable and cannot quickly start the engine. The invention can optimize the start control of the range extender and improve the generator Starting efficiency and reducing the starting time of the range extender, so as to maximize the electric advantages and achieve the purpose of quickly starting the engine

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