create multiple excel sheets

writer = pd.ExcelWriter('auto.bg.xlsx', engine='openpyxl')
df_diesel.to_excel(writer, sheet_name='Diesel engines')
df_gasoline.to_excel(writer, sheet_name='Gasoline engines')
df_electric.to_excel(writer, sheet_name='Electric engines')
df_hybrid.to_excel(writer, sheet_name='Hybrid engines')
writer.save()