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 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.

The disclosure includes embodiments for modifying a performance of a vehicle component whose performance is affected by a vehicle fluid that is contaminated by water. A method according to some embodiments includes recording sensor data describing refractometry measurements for the vehicle fluid. The method includes determining contamination data that describes an amount of water present in the vehicle fluid. The method includes analyzing the contamination data to determine parameter data describing modifications for a set of parameters for an advanced driver assistance system (ADAS system) that control the operation of the ADAS system, wherein the parameter data is operable to update the set of parameters and thereby modify the operation of the ADAS system to compensate for the amount of water present in the vehicle fluid so that vehicle component performs as though the vehicle fluid is substantially not contaminated by water.

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 is provided in a hybrid vehicle in which a shift to a fuel maintenance mode prioritizing consumption of fuel is automatically performed under a predetermined condition regardless of a driver's intention. The fuel maintenance guide system includes an information notification unit configured to perform notification of information urging consumption of the fuel, and a control unit configured to estimate a time to shift automatically to the fuel maintenance mode and to begin to perform notifying actuation of the information notification unit a predetermined period of time before the estimated time.

A catalyst control system includes a stop and start module that, during a period that the vehicle is ON between (i) a first time when the vehicle is turned ON and (i) a second time when the vehicle is next turned OFF, selectively shuts down and starts a spark ignition engine of the vehicle. A catalyst light off (CLO) control module initiates a first CLO event for a first engine startup during the period and, when a temperature of a catalyst that receives exhaust output by the engine is less than a predetermined temperature, selectively initiates a second CLO event for a second engine startup during the period. A fuel control module richens fueling of the engine during the first and second CLO events of the period. A spark control module retards spark timing of the engine during the first and second CLO events of the period.

The disclosure includes embodiments for modifying a performance of a vehicle component whose performance is affected by a vehicle fluid that is contaminated by water. A method according to some embodiments includes recording sensor data describing refractometry measurements for the vehicle fluid. The method includes determining contamination data that describes an amount of water present in the vehicle fluid. The method includes analyzing the contamination data to determine parameter data describing modifications for a set of parameters for an advanced driver assistance system (ADAS system) that control the operation of the ADAS system, wherein the parameter data is operable to update the set of parameters and thereby modify the operation of the ADAS system to compensate for the amount of water present in the vehicle fluid so that vehicle component performs as though the vehicle fluid is substantially not contaminated by water.

A hybrid electric vehicle system comprises an internal combustion (IC) engine and an electric engine providing power to a drive shaft of the vehicle. The IC engine receives a fuel from a fuel tank. Exhaust gases from the IC engine are treated at an exhaust treatment apparatus including a reagent tank containing a reagent. A controller monitors a quality of the fuel in the fuel tank and the reagent in the reagent tank and if needed, initiates fuel degradation reduction event or a reagent degradation reduction event. These events can include running the IC engine even if a battery supplying power to the motor is not discharged. The fuel degradation reduction event includes dosing the fuel tank with an antioxidant to reduce the rate of degradation of the fuel.

A control apparatus of a plug-in hybrid electric vehicle that is provided with a fuel tank, an engine, a battery, and an electric motor. The battery is chargeable by an external power source. The control apparatus includes a fuel deterioration determiner and a regeneration amount limiter. The fuel deterioration determiner determines whether a fuel stored in the fuel tank is deteriorated. The regeneration amount limiter reduces, when the fuel is determined by the fuel deterioration determiner as being deteriorated, a regeneration amount to be less than the regeneration amount of a case where the fuel is determined by the fuel deterioration determiner as not being deteriorated. The regeneration amount is an amount of regeneration of electric power generated by the electric motor upon deceleration of the plug-in hybrid electric vehicle.