An evaporative emissions (EVAP) control system for a vehicle includes a purge pump configured to pump fuel vapor to a direct injection (DI) engine of the vehicle via a vapor line and a purge valve and a hydrocarbon (HC) sensor disposed configured to measure an amount of HC in the fuel vapor. The system also includes a controller configured to detect an HC vapor supply condition indicative of an operating condition of the Di engine where engine vacuum is less than an appropriate level for delivering the fuel vapor to the DI engine via the vapor line; and in response to detecting the HC vapor supply condition, controlling at least one of the purge pump and the purge valve, based on the measured amount of HC, to deliver a desired amount of fuel vapor to the DI engine to decrease particulate matter (PM) produced by the DI engine.

An evaporative emissions (EVAP) control system for a vehicle includes a purge pump configured to pump fuel vapor to an engine of the vehicle via a vapor line and a purge valve. The system includes a hydrocarbon (HC) sensor disposed in the vapor line and configured to measure an amount of HC in the fuel vapor pumped by the purge pump to the engine via the vapor line. A controller is configured to: detect an imminent cold start of the engine and, in response to the detecting, perform the cold start of the engine by controlling at least one of the purge pump and the purge valve, based on the measured amount of HC, to deliver a desired amount of fuel vapor to the engine, which decreases HC emissions by the engine.

A vehicle includes a fuel tank, a primary canister, a secondary canister, a first valve, a second valve, a third valve, a heater, and a controller. The primary and secondary canisters are in fluid communication with the fuel tank and are configured to receive and store evaporated fuel from the fuel tank. The first valve is disposed between the fuel tank and the primary canister. The second valve is disposed between the secondary canister and ambient surroundings. The third valve is disposed between the primary canister and an engine. The heater is configured to heat the primary and secondary canisters. The controller is programmed to (i) activate the heater to heat the primary and secondary canisters and (ii) purge the evaporated fuel from the primary and secondary canisters after heating the primary and secondary canisters.

A method for diagnosing operation of a valve to purge a canister of an internal combustion engine, the method, carried out during a purge, including: a) detecting, at an instant to, that the purge valve is open; b) executing a forced closing of the valve at an instant t2; c) measuring a pressure P1m of the intake manifold and calculating a corresponding modelled pressure P1c, at an instant t1 between the instant t0 and the instant t2; d) measuring a pressure of the manifold P2m and calculating a corresponding modelled pressure P2c, at an instant t3 after the instant t2; e) calculating a deviation E1 between P1m and P1c and calculating a deviation E2 between P2m and P2c; f) calculating a criterion C=E1−E2; and g) diagnosing malfunction of the purge valve if the criterion C is lower than a predetermined threshold value Cs.

A fuel vapor treating apparatus includes a canister, a purge pipe, a purge control valve, and a heating device. The canister is configured to store fuel vapor generated in a fuel tank. The purge pipe is configured to deliver the fuel vapor stored in the canister to an intake passage of an internal combustion engine together with air. The purge control valve is configured to be attached to the purge pipe to be selectively opened and closed in order to adjust a purge flow rate. The purge control valve is also configured to be opened based on a purge request that is made after the internal combustion engine is started. The heating device is configured to heat the purge control valve after the internal combustion engine is started and before the purge request is made.

A mixture-lubricated four stroke engine has a cylinder in which a combustion chamber is formed. The combustion chamber is delimited by a piston which is mounted movably in the cylinder. The engine has an intake channel which discharges into the combustion chamber via an inlet opening controlled by an inlet valve. A mixture formation unit includes at least one fuel opening which discharges into the intake channel. For the lubrication of the crankcase interior, a flow connection connects the intake channel to the crankcase interior via a connecting opening which discharges into the intake channel downstream of the mixture formation unit. The fuel quantity is controlled by a fuel valve. A control unit is configured to activate the fuel valve in a manner dependent on the position of the crankshaft such that the fuel valve is opened at least also during a part of the compression stroke.

An evaporated fuel processing device for a forced induction internal combustion engine according to the present invention includes: a first purge path extending from the downstream of a purge control valve to an intake pipe at the downstream of a throttle valve; and a second purge path extending from the downstream of the purge control valve to an ejector provided in a reflux pipe providing communication between the intake pipe at the downstream of a compressor and the intake pipe at the upstream of the compressor. The evaporated fuel processing device switches first control characteristic data for the first purge path and second control characteristic data for the second purge path, when the first purge path and the second purge path are switched.

Methods and systems are provided for a fuel system. In one example, a method may include cleaning an orifice of an ELCM. The cleaning includes adjusting a position of a valve in a passage to fluidly couple a reference orifice of the ELCM to an intake manifold.

Methods and systems for deicing an engine air intake filter and an engine throttle are described. The methods and systems may include activating an evaporative emissions system heater and a pump to de-ice the engine air intake filter and the engine throttle. The deicing may be performed when an engine of a vehicle is not operating.

A hybrid vehicle includes a canister that adsorbs evaporative fuel generated in the fuel tank for an internal combustion engine. The hybrid vehicle can drive a drive wheel even when the internal combustion engine is stopped. When the internal combustion engine of the hybrid vehicle is stopped and a prescribed set of conditions is satisfied, the internal combustion engine is rotated by the generator. When the internal combustion engine of the hybrid vehicle is rotated by the generator, the evaporative fuel adsorbed in the canister is supplied to the upstream side of an upstream side exhaust catalytic converter device. In the hybrid vehicle, the introduced evaporative fuel as reducing agent is adsorbed in the upstream side exhaust catalytic converter device and a downstream side exhaust catalytic converter device.