Abstract
Vehicles with electric propulsion systems are increasingly more often equipped with solutions that improve their drive system’s efficiency. The latest vehicle model with a fuel cell hybrid system – Toyota Mirai was used in this experiment. The design of this vehicle is similar to that of hybrid vehicles in many aspects. However, new fuel cell technologies are being developed for automotive use, including compressed hydrogen tanks and control systems. The article presents an analysis of a fuel cell operation during vehicle start-up and driving, with particular emphasis on the hydrogen injection strategy of the three fuel injectors used in the fuel cell. The fuel cell interaction with the high-voltage battery has also been characterized. It has been shown that increase in the electrical supply voltage of the vehicle’s electric motor can be observed at high torque values of the electric motor. The maximum voltage gain – approximately three times (up to about 650 V) – allows for double the torque of the drive system compared to the standard value.
Highlights
The transport development strategy, approved for implementation by the European Commission, calls for the reduction of greenhouse gas emissions from the transport sector
The fuel cell analysis was performed during the first test drive of the Toyota Mirai vehicle in Poland
The Toyota Mirai vehicle drive system analysis was performed in fuel cell start-up conditions
Summary
The transport development strategy, approved for implementation by the European Commission, calls for the reduction of greenhouse gas emissions from the transport sector. The main advantage of this standard is the time of refueling kilograms of hydrogen, i.e. filling the tank from 0 to 100% which takes about 3 minutes This is the main argument for this type of energy carrier, as opposed to the time consuming charging of electric vehicles. For the considered energy carriers, the current price and availability of speak for the use of batteries This is due to the fact that the initiative of construction of the electric vehicle charging infrastructure had already been undertaken as well as the incentive in the form of a reduced cost recharging or even free sources of electricity that have been provided.
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