Patent ID: 6932060
Filing Date: 2005-08-23
Classification: F02D,F02M,Y02T

Abstract:
1. A method for starting an LPI engine in a partial cool-down state comprising the steps of: receiving a cooling water temperature, a suction air temperature, and a fuel temperature in a fuel line to operate a fuel pump when an ignition key is turned on; determining that the engine is in a partial cool-down state when the cooling water temperature and the suction air temperature are above a standard levels, and the difference between the said fuel temperature and a fuel temperature of the engine when the engine is turned off is above a standard level; lighting a lamp for a first predetermined period of time when it is determined that the engine is in a partial cool-down state, such that fuel is not injected into the engine during the first predetermined period of time; selecting an injector inner temperature based upon the suction air temperature, the cooling water temperature and the fuel temperature in the fuel line; seeking a target fuel pressure based upon the injector inner temperature to discriminate whether the fuel pressure in the fuel line has reached the target fuel pressure thus obtained; maintaining a lighted state of the lamp at the first stand-by stage when the fuel pressure in the fuel line has not reached the target fuel pressure, such that fuel is not injected into the engine; and injecting fuel into the engine to complete the starting of the engine when the fuel pressure has reached the target fuel pressure or when the second predetermined period of time has elapsed, whichever is earlier.