Method and arrangement in a hybrid vehicle

摘要

In a method and an arrangement for powering up a DC distribution system in a hybrid vehicle power train, the power train includes an electric storage system, an internal combustion engine, an electric motor/generator, a clutch device to connect the electric motor/generator to the internal combustion engine, a power electronics unit with a voltage regulator connected to the electric motor/generator, and an electronic control unit for controlling the power train. The electric storage system and the electric motor/generator are connectable to one or more electrical loads for driving the vehicle. The powering up includes initializing internal combustion engine ignition, initializing a diagnostics test of power train components, cranking the internal combustion engine, requesting pre-charge of the electrical loads from the power electronics unit, connecting the electric storage system to the electrical loads when the pre-charge and the diagnostics test are completed, and resuming normal operation for the power electronics unit.

主权项

1. A method for powering up a DC distribution system in a hybrid vehicle power train, the power train comprising an electric storage system, an internal combustion engine, an electric motor/generator, a clutch device to connect the electric motor/generator to the internal combustion engine, a power electronics unit with a voltage regulator connected to the electric motor/generator, and an electronic control unit for controlling the power train, wherein the electric storage system and the electric motor/generator are connectable to one or more electrical loads for driving, the vehicle, comprising
initializing internal combustion engine ignition; initializing a diagnostics test of power train components; cranking the internal combustion engine using a starter motor; requesting pre-charge of the electrical loads from the power electronics unit, comprising requesting a predetermined voltage from the power electronics unit and controlling the voltage regulator to enter a pre-charge mode to power up the DC distribution system; connecting the electric storage system to the electrical loads when the diagnostics test and the pre-charge are completed; and resuming normal operation for the power electronics unit to complete powering up of the DC distribution system.