32 results about "Flexible-fuel vehicle" patented technology

A sensor detects a fuel level and fuel concentration in a fuel tank of a flexible fuel vehicle (FFV) that uses flexible fuel such as ethanol fuel or alcohol fuel. The fuel sensor includes: a level sensor which is inserted into a lower surface of a pump module housing; and a concentration sensor which is mounted on a side surface of the pump module housing.

A method and a system for indicating a fuel efficiency in a vehicle is provided that includes a density sensor configured to measure the density of a fuel mixture stored in a fuel tank. In addition, a controller is configured to derive the mix ratio related to the fuel mixture via the density measured by the density sensor and change a reference value of a fuel calculation logic based on the mix ratio. In addition, the controller is configured to determine the fuel efficiency based on the changed reference value.

A fuel separation method by which auxiliary fuel is separated from blended gasoline fuel for a flexible fuel vehicle capable of using ethanol-blended gasoline fuel, the method including the following steps (a) and (b): (a) a step in which, when the ethanol concentration is low, the blended gasoline fuel is separated by a polar separating membrane member at a relatively high separation temperature to obtain, at the permeation side of the membrane, a first auxiliary fuel enriched with the aromatic gasoline components and ethanol component, and (b) a step in which, when the ethanol concentration is high, the blended gasoline fuel is separated by a polar separating membrane member at a relatively low second separation temperature to obtain, at the permeation side of the membrane, a second auxiliary fuel enriched with the non-aromatic high-volatile gasoline components.

An auxiliary fuel tank for a flexible fuel vehicle is provided. The auxiliary fuel tank is mounted to an auxiliary tank body for storing gasoline fuel and is installed in an engine compartment of a flexible fuel vehicle. The auxiliary fuel tank includes a canister that is coupled to the auxiliary tank body and has activated carbon therein. The canister is configured to collect fuel evaporation gas generated in the auxiliary tank body to supply fuel components to an engine.

An ethanol flexible fuel automobile gear-shifting prompting method, comprising the following steps: (1) determining a speed ratio i from a ratio of a gearbox output shaft rotation speed n out and an engine rotation speed N; (2) comparing the speed ratio i with speed ratio of respective gears in the gearbox to determine the gear of the vehicle; (3) determining a fitting coefficient according to the gear in step (2), and combining the same with a current fuel concentration a% to fit a gear shift vehicle speed according to the current fuel concentration a% and the current gear; and (4) when the vehicle speed reaches the gear shift vehicle speed of step (3), prompting to shift a gear of the vehicle. The gear-shifting prompting method performs fitting to achieve the most economic gear-shifting rule according to an ethanol / gasoline concentration, thus enabling the vehicle to always prompt the driver to shift gear in an economic gear-shifting zone, and improving vehicle fuel economy.

The invention relates to a cold start system of a flexible fuel vehicle, which includes an engine control unit, a fuel system and a fuel preheating module; the fuel preheating module includes a water temperature sensor, a preheating indicator light, a power output module and a heating spray oiler. After the start switch is turned on, the preheat indicator light is on first, the water temperature sensor transmits the cooling water temperature signal to the engine control unit, and the engine control unit calculates the duty ratio signal to judge whether the output power of the power output module is required; The output current of the fuel injector. While heating the ethanol fuel, the heating injector feeds back the temperature signal of the heating injector to the engine control unit for judging the end time of warm-up.

Disclosed is an engine starting control method for a flexible fuel vehicle (FFV) of supplying the heated fuel to the engine by heating an injector heater during cranking when it is determined that cranking condition and fuel heating condition are satisfied at the time of starting the vehicle having a starting auxiliary device for cranking the engine of FFV and a device for heating the fuel using the injector heater provided in an injector, wherein a pre-injection is auxiliary performed prior to a main injection during cold starting of the engine when the heating time of the injector heater exceeds a predetermined value, allowing stable starting with low fuel consumption at a time of cold starting an engine using ethanol fuel in winter.

The present invention relates to a diagnosis method for an ethanol sensor of a flexible fuel vehicle, the diagnosis method including: a) the fuel refilling detection step of detecting whether fuel is filled to a fuel tank; b) the maximum changeable content range calculation step of calculating a content range of ethanol in the fuel stored in the fuel tank; c) the ethanol sensor value acquirement step of determining whether the data detected from an ethanol sensor converges into a given value; d) the oxygen sensor value acquirement step of determining whether the data detected from an oxygen sensor converges into a given value; and e) the ethanol sensor abnormality determination step of determining that an error is generated from the ethanol sensor if the data acquired at the ethanol sensor value acquirement step or the data acquired at the step is not a value in the calculated range.

The invention discloses an automobile fuel control method and controller. The control method provided by the invention is characterized in that the controller effectively controls engine fuel injection quantity on the premise of not changing an automobile computer and adjusts the fuel injection quantity by intercepting an oil injection impulse signal from an ECU (electronic control unit) of the automobile computer so as to keep the air-fuel ratio Lambada of a car to be within 1+ / -0.03 and ensure flexible and efficient startup and stable operation of the car in the event that different types of fuels are used. The controller comprises a signal input circuit, a shaping circuit, a processing module and a drive circuit mode handover switch, wherein the signal input circuit, the shaping circuit, the processing module and a drive circuit are sequentially connected together; the mode handover switch is connected with the processing module; and a temperature-measuring circuit is connected with the processing module. The controller also comprises at least one subcontrol unit which is connected with a main control unit and is used for controlling a plurality of air cylinders. The control method and controller provided by the invention have the advantages of reasonable design, high reliability, strong practicability and the like, thus being applicable to popularization and use in flexible fuel vehicles.

The invention discloses an engine starting control system used for a flexible fuel vehicle. The engine starting control system used for the flexible fuel vehicle comprises an engine control unit, a main relay, a starting control relay and a starter; the coil of the main relay is connected between a main relay control pin of the engine control unit and the positive electrode of a storage battery; the contact of the main relay and the contact of the starting control relay are connected between the positive electrode of the storage battery and the starter in series; the contacts of the main relay and starting control relay are normally open contacts; the coil of the starting control relay is connected between a starter control pin and an ignition signal pin; when the engine control unit works, the main relay control pin is located at a low potential, when the engine control unit stops working, the main relay control pin is located at a high-resistance state; when the engine control unit works, if an oil rail locates at a heating state, the starter control pin is located at a high-resistance value state. The engine starting control system used for the flexible fuel vehicle is capable of forbidding the engine to work before finishing heating fuel oil so as to prevent starting failure.