Patent ID: 9127610
Filing Date: 2015-09-08
Classification: F02D,H04L,Y02T

Abstract:
1. A method of controlling a diesel engine system of a vehicle, the method comprising: sensing a fuel pressure in a common rail of the engine; generating a signal indicative of the sensed fuel pressure; encrypting the signal to generate an encrypted data message signal containing information indicative of the sensed fuel pressure; periodically transmitting the encrypted signal to an engine control means; decrypting the encrypted signal to obtain the information indicative of the sensed fuel pressure; transmitting a non-encrypted signal to the engine control means in parallel with the encrypted signal, the non-encrypted signal also containing information indicative of the sensed fuel pressure; comparing the information contained in the non-encrypted signal with the information contained in the encrypted signal; at predetermined time intervals; controlling fuel pressure in the common rail on the basis of the non-encrypted signal in accordance with a demanded engine power output if the information contained in the non-encrypted signal is substantially the same as the information contained in the encrypted signal; and entering a recovery mode in the event that the information contained in the non-encrypted signal is not substantially the same as the information contained in the encrypted signal; wherein the recovery mode is selected from the group consisting of: a mode in which engine starting is prevented, a mode in which the engine speed is a function of the driver pedal position, and a mode in which the engine speed is fixed at a predetermined value.