Patent ID: 7957888
Filing Date: 2011-06-07
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A vehicle system, comprising: a first fuel storage tank; a second fuel storage tank; at least one cylinder; a port injection fuel injector to inject fuel into an intake passage in operative communication with the at least one cylinder, the port injection fuel injector being supplied with a first type of fuel from the first fuel storage tank; a direct injection fuel injector to inject fuel directly into the at least one cylinder, the direct injection fuel injector being selectively supplied with the first type of fuel from the first fuel storage tank and a second type of fuel from the second fuel storage tank; an emissions control device positioned to receive emissions exhausted from the at least one cylinder; and a control system configured to cause the first type of fuel from the first fuel storage tank to be supplied to the direct injection fuel injector in response to an engine start condition, said control system further configured to supply the second type of fuel from the second fuel storage tank based on a temperature of the emissions control device exceeding a threshold temperature, and configured to cause the direct injection fuel injector to be supplied with fuel from the first fuel storage tank when an amount of fuel in the second fuel storage tank is less than a threshold amount.