An exhaust system includes an exhaust line configured to receive an exhaust mixture. The exhaust system further includes an oscillating assembly connected to the exhaust line. The exhaust system further includes a feedback path extending from an external gas source to the oscillating assembly, wherein the feedback path is separate from the exhaust line.

An apparatus and method used to maintain an engine coolant system and related components, which may be easily and quickly connected to multiple configurations and sizes, whereby an engine forward flushing can be accomplished.

An apparatus and method used to maintain an engine coolant system and related components, which may be easily and quickly connected to multiple configurations and sizes, whereby an engine forward flushing can be accomplished.

Methods and systems are provided for reducing coking deposits in a fuel injection system. In one example, a method may comprise humidifying intake air of an intake system of an engine in response to a determination that fuel injector coking is occurring, or after a duration has passed since a most recent humidification event. A humidifying fluid, such as water, may be injected into the intake system to humidify the intake air, and the resulting humidified intake air may reduce and/or remove coking deposits on one or more direct fuel injectors of the fuel injection system.

When only smoke is generated, the sensor sensitivity is not substantially changed from the initial value. When both smoke and unburned HC are generated, the number of times the sensor sensitivity becomes lower than the initial value is increased. From these results, it can be understood that a deposit is formed in the presence of unburned HC and smoke existing simultaneously. The degree of reduction in sensor sensitivity becomes higher if the smoke concentration is increased when the unburned HC concentration condition is fixed. From this result, it can also be understood that while the coexistence of smoke and unburned HC is a prerequisite, unburned HC contributes largely to the formation of a deposit.

When only smoke is generated, the sensor sensitivity is not substantially changed from the initial value. When both smoke and unburned HC are generated, the number of times the sensor sensitivity becomes lower than the initial value is increased. From these results, it can be understood that a deposit is formed in the presence of unburned HC and smoke existing simultaneously. The degree of reduction in sensor sensitivity becomes higher if the smoke concentration is increased when the unburned HC concentration condition is fixed. From this result, it can also be understood that while the coexistence of smoke and unburned HC is a prerequisite, unburned HC contributes largely to the formation of a deposit.

The invention includes a system to reduce deposits from a surface of an intake valve, preferably in a GDI engine. The system includes a delivery device having a reservoir for holding a cleaning agent. The reservoir has a body that defines an interior space, and an outlet port in fluid communication with the interior space of the reservoir body. The delivery device has a delivery conduit that extends from the outlet port and terminates at a distal end. The proximal end of the delivery conduit is in fluid communication with the outlet port. An actuator having an open position and a closed position is included in the delivery device. Upon activation of the actuator from a closed position to an open position, a portion of the cleaning agent flows from the interior space through the outlet port and is delivered under pressure to distal end of the delivery conduit. The cleaning agent includes a detergent, a carrier, and an oil. In a preferred embodiment, the system is an aerosolized. Also contemplated with the scope of the invention are related methods of removing deposits from the surface of an intake valve and/or of enhancing or improving engine performance.

The invention includes a system to reduce deposits from a surface of an intake valve, preferably in a GDI engine. The system includes a delivery device having a reservoir for holding a cleaning agent. The reservoir has a body that defines an interior space, and an outlet port in fluid communication with the interior space of the reservoir body. The delivery device has a delivery conduit that extends from the outlet port and terminates at a distal end. The proximal end of the delivery conduit is in fluid communication with the outlet port. An actuator having an open position and a closed position is included in the delivery device. Upon activation of the actuator from a closed position to an open position, a portion of the cleaning agent flows from the interior space through the outlet port and is delivered under pressure to distal end of the delivery conduit. The cleaning agent includes a detergent, a carrier, and an oil. In a preferred embodiment, the system is an aerosolized. Also contemplated with the scope of the invention are related methods of removing deposits from the surface of an intake valve and/or of enhancing or improving engine performance.

The present invention discloses a carbon removing and cleaning device and method for an engine fuel nozzle and a combustion chamber of an automobile. The carbon removing and cleaning device comprises a fuel supply pipeline provided with a quick joint and a fuel line connection arranged in the front of the engine fuel nozzle; and a tee joint is connected between the quick joint and the fuel line connection, the quick joint is connected with a first inlet of the tee joint, an outlet of the tee joint is connected with the fuel line connection, a second inlet of the tee joint is connected with a pressurized cleaning agent tank, an electric control cleaning agent nozzle is arranged between the second inlet and a connecting port of the cleaning agent tank, and the pressure of a cleaning agent in the cleaning agent tank is larger than the fuel supply pressure of a fuel supply pipeline. The carbon removing and cleaning device is simple in structure, the cleaning agent can be directly mixed into fuel through a tee additionally arranged in a fuel delivery pipeline, and dynamic mixing ratio control can be performed by virtue of the electric control cleaning agent nozzle, so that a satisfied cleaning effect for the fuel nozzle and the top of a piston is achieved under the conditions that the stable idling operation of the engine is maintained, a proper amount of cleaning agent is input and the cleaning time is reasonable.

The present invention discloses a carbon removing and cleaning device and method for an engine fuel nozzle and a combustion chamber of an automobile. The carbon removing and cleaning device comprises a fuel supply pipeline provided with a quick joint and a fuel line connection arranged in the front of the engine fuel nozzle; and a tee joint is connected between the quick joint and the fuel line connection, the quick joint is connected with a first inlet of the tee joint, an outlet of the tee joint is connected with the fuel line connection, a second inlet of the tee joint is connected with a pressurized cleaning agent tank, an electric control cleaning agent nozzle is arranged between the second inlet and a connecting port of the cleaning agent tank, and the pressure of a cleaning agent in the cleaning agent tank is larger than the fuel supply pressure of a fuel supply pipeline. The carbon removing and cleaning device is simple in structure, the cleaning agent can be directly mixed into fuel through a tee additionally arranged in a fuel delivery pipeline, and dynamic mixing ratio control can be performed by virtue of the electric control cleaning agent nozzle, so that a satisfied cleaning effect for the fuel nozzle and the top of a piston is achieved under the conditions that the stable idling operation of the engine is maintained, a proper amount of cleaning agent is input and the cleaning time is reasonable.