A display device is provided with a fuel gauge (40) that displays the amount of fuel remaining in a fuel tank (24) (remaining amount) of a hybrid vehicle (10) provided with an engine (13) that consumes fuel supplied from the fuel tank (24) and generates power by driving wheels (15) or rotating a motor (11). The hybrid vehicle is provided with a non-traveling/non-power generating mode, or in other words, a fuel consumption mode or an engine maintenance mode in which the engine (13) is forced to run and consume fuel for purposes other than traveling or generating power. Of the fuel (41a) displayed in the fuel gauge (40), the region (41aa) corresponding to the amount of fuel consumed in the non-traveling/non-power generating mode is displayed so as to be distinguishable by color from another region (41ab).

A fuel maintenance guide system in hybrid vehicles in which a shift to the fuel maintenance mode giving priority to consuming fuel is executed automatically under a predetermined condition regardless of intention of a driver, the fuel maintenance guide system including: a residual fuel detecting unit detecting a residual amount of the fuel; a cancel condition determining unit determining a cancel condition for cancelling the shift to the fuel maintenance mode, based on the residual amount detected by the residual fuel detecting unit; and a displaying unit displaying the cancel condition determined by the cancel condition determining unit from a predetermined time period before the shift to the fuel maintenance mode.

A fuel maintenance guide system in hybrid vehicles in which a shift to the fuel maintenance mode giving priority to consuming fuel is executed automatically under a predetermined condition regardless of intention of a driver, the fuel maintenance guide system including: a residual fuel detecting unit detecting a residual amount of the fuel; a cancel condition determining unit determining a cancel condition for cancelling the shift to the fuel maintenance mode, based on the residual amount detected by the residual fuel detecting unit; and a displaying unit displaying the cancel condition determined by the cancel condition determining unit from a predetermined time period before the shift to the fuel maintenance mode.

A hybrid vehicle includes: an engine configured to output power for traveling; a motor configured to output power for traveling; a switch configured to set a fuel economy priority mode, in which priority is given to fuel economy, and to cancel the fuel economy priority mode; and a controller configured (a) to operate the engine and the motor based on the switch setting; (b) to determine the presence/absence of degradation of fuel supplied to the engine; and (c) to prohibit setting of the fuel economy priority mode by the switch subsequently when determination is made that the fuel has degraded when the hybrid vehicle travels using power of the motor in a state in which the drive of the engine is stopped.

A hybrid vehicle includes: an engine configured to output power for traveling; a motor configured to output power for traveling; a switch configured to set a fuel economy priority mode, in which priority is given to fuel economy, and to cancel the fuel economy priority mode; and a controller configured (a) to operate the engine and the motor based on the switch setting; (b) to determine the presence/absence of degradation of fuel supplied to the engine; and (c) to prohibit setting of the fuel economy priority mode by the switch subsequently when determination is made that the fuel has degraded when the hybrid vehicle travels using power of the motor in a state in which the drive of the engine is stopped.

A fuel maintenance guide system for a vehicle includes a user-notification-information generating part capable of generating user notification information including duration, and free capacity, based on duration calculated in a fuel-maintenance-execution-date calculation part and free capacity calculated in a fuel-tank-free-capacity computing part, and a user notification part capable of receiving the user notification information, generated in the user-notification-information generating part, from the user-notification-information generating part and displaying the user notification information on a screen.

An ECU includes: a control section for controlling an engine such that the engine is operated in an intermediate load state during electric power feed to the outside of a vehicle; a learning section for learning a control parameter based on a detected state quantity; and a determination section for determining whether a learning condition that the learning section learns the control parameter is established. When the learning condition is established during the electric power feed from the electric power feed section to the outside of the vehicle, the engine is controlled such that a state thereof is changed from the intermediate load state to either an idle state or a low load state, and the control parameter regarding the engine in the idle state or the low load state is learned.

An ECU includes: a control section for controlling an engine such that the engine is operated in an intermediate load state during electric power feed to the outside of a vehicle; a learning section for learning a control parameter based on a detected state quantity; and a determination section for determining whether a learning condition that the learning section learns the control parameter is established. When the learning condition is established during the electric power feed from the electric power feed section to the outside of the vehicle, the engine is controlled such that a state thereof is changed from the intermediate load state to either an idle state or a low load state, and the control parameter regarding the engine in the idle state or the low load state is learned.

Methods and systems are provided for adjusting a power output strategy at a track. In one example, a method may include customizing the power output strategy in response to user inputs. The power output strategy may be associated with a user profile stored in an application, the user profile further comprising items desired by the user for a track day along with post-track day debriefs including data with regard to previous track days.

The present invention provides a hybrid vehicle, including a power battery, a fuel storage tank, an electrical power generation unit, a pressure detection unit and a work mode controller, and adopts a pressure protection mode under the work mode controller, wherein the work mode controller is configured to control the vehicle to enter the pressure protection mode when the electrical power generation unit is in a stop state and when the gas pressure detected by the pressure detection unit is higher than a pressure threshold; and in the pressure protection mode, the electrical power generation unit is started from the stop state to enter the working state to consume the fuel in the fuel storage tank, and the gas pressure in the fuel storage tank is accordingly reduced. As the pressure protection mode is adopted in the present invention, the electrical power generation unit can be automatically started according to the gas pressure of the fuel in the fuel storage tank to charge the power battery using the expanded redundant fuel. The safety problem and the waste resulting from the fact that the expanded fuel exceeding the threshold in the fuel storage tank is discharged into the atmosphere in the prior art are avoided.