Study On Software Platform Functionality Of GDI Engine In A Hybrid Vehicle

At the present time energy and environmental problems is serious increasingly. In order to solve the energy shortage and the air pollution problem the new energy vehicles’ research and development has come to be the mainstream of automotive industry. New energy vehicles mainly refer to fuel cell vehicles, hydrogen powered cars, solar cars and hybrid vehicles. Hybrid vehicle are pure gasoline engine era transition to electric drive motor car era of the middle stage of the product. This paper study on A hybrid car GDI engine software platform, study the hybrid car engine control software platform in the method of Bench.This paper carried out about the content of the work below:1) Analysis hybrid ECU control scheme. The hybrid car use CAN communication protocol for HCU and ECU communication. The control program consists: hybrid engine torque structure, 12 V motor and Crank starting control schemes.2) The engine software platform verification process has been designed in this paper. And use the experimental research on the validation software features. Built the engine test Bench. Calibration software INCA and analog HCU device CANoe was used to measure and analysis bench test results.3) EMS software logic functions has been analyzed which include: engine start stop function, two different ways 12 V starter motor start and motor starter with ISG, the implementation logic compared to the non-hybrid engine start of the new oil line GDI functions, calculation logic engine shut down; target idle speed computational logic functions, idling target speed coordinate calculation using the logical software engine speed to control fuel injection, air intake and ignition three-way to achieve power transmit for the hybrid vehicle; torque structure compared to non-hybrid vehicle is relatively simple, engine has no necessary to coordinate accessories, and so driving torque need to calculate the engine clutch torque, ECU only needs to control engine combustion for output the clutch torque equal to HCU command.4) Bench test results analysis. Use INCA software MDA processing the results after the bench:engine restart function is failure, idle speed is higher than the target, clutch output torque is larger than need etc. By analysis, inspection and other methods to modify the calibration value ultimately realized ECU engine control scheme comply with the control of HCU.