Integrated starter/generator hybrid power system and controlling method

Abstract

In the invention, the power system consists of an engine, an integrated starting generator, a starter and a controller. The controller is made up of a main control module and power control modules of the integrated starting generator and the starter, a temperature probe and a pair of the voltage sensors connected with the main control module separately. The control method comprises the following steps of sending self-checking command via the controller; detecting whether the power control module of the integrated starting generator is normal or not to determine the running mode of the integral car via the controller; detecting the ambient temperature via the controller; detecting the voltage and the quantity of electricity output by the power battery to determine the starting engine mode via the controller; waiting for starting order via the controller and running of the integral car after starting the engine.

Description

technical field [0001] The invention relates to an automobile power system and control technology, in particular to an integrated starter / generator hybrid power system and a control method. Background technique [0002] A traditional fuel vehicle in the prior art uses a starter powered by a 12V battery to start the engine. The power system of the traditional fuel vehicle is composed of an engine and a starter set on the engine casing; the main shaft of the engine extends out of the casing. A flywheel is arranged on one end, teeth are arranged on the outer diameter of the flywheel, teeth are also arranged on the starter main shaft arranged on the engine casing, and are meshed with the teeth on the outer diameter of the flywheel. After the driver gives the command to start the engine, he turns on the starter powered by the 12V battery through the control switch, and the starter drives the engine to rotate. After combustion, start the engine to idle speed (800-1000 rpm, depend...

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Problems solved by technology

[0003] The disadvantages of the power system of this traditional fuel vehicle in the prior art are: the engine consumes fuel and has low efficiency; the exhaust pollution of the vehicle is large; when the power system fails, it cannot resume normal operation in time, which affects the safe and reliable operation of the vehicle

[0005] The integrated starter-generator starting method used in the power system of the prior art has the advantages of quick start and energy saving, but in actual application, its disadvantage is that since the integrated starter-generator is both a starter and a generator, it The requirements of these two functions for the maximum electric torque and power generation must be met at the same time. When the ambient temperature is very low, such as minus 40 degrees, starting an ordinary car engine requires a torque of more than 80Nm, and the output torque of the integrated starter generator must be in accordance with the output torque The index design of more than 80Nm leads to a large size of the integrated starter generator, which brings inconvenience to the layout of the whole vehicle, and may even cause installation problems; in addition, in the power system, there is only an integrated starter generator without a starter , if the integrated starter generator and its controller, or the power battery and its control system installed on the car, or the high-voltage control / safety system fail, or the performance of the power battery is insufficient, the output voltage is low, etc., the power The system cannot work normally, the engine cannot be started, and the entire vehicle cannot run at all

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