Systems for the reduction of intake valve deposits and methods

A system to reduce deposits from a surface of an intake valve comprising:

• a delivery device comprising a reservoir for holding a cleaning agent having a body defining an interior space and an outlet port in fluid communication with the interior space of the reservoir body, a delivery conduit extending from the reservoir body and terminating in a distal end having a single outlet and having a proximal end that is in fluid communication with the outlet port;
• and an actuator having an open position and a closed position, the reservoir containing a cleaning agent, the cleaning agent comprising a detergent that solubilizes carbon deposits and a petroleum distillate, and an aerosol propellant, wherein upon activation of the actuator from the closed position to the open position, a portion of the cleaning agent flows from the interior space through the outlet port and is delivered through the single outlet of the distal end of the delivery conduit, wherein the reservoir contains a single dose of cleaning agent in the range of about 150 g to about 300 g of cleaning agent, and wherein the cleaning agent is formulated to remain on an intake valve surface for a sufficient time to solubilize intake valve deposits before volatilization, the petroleum distillate having a vapor pressure equal to or less than number 2 diesel fuel.