Patent ID: 8474247
Filing Date: 2013-07-02
Classification: F01N,F02D,Y02T

Abstract:
1. A control system for a vehicle comprising: a first electronic circuit configured to select one of a first post-injection mode and a second post-injection mode based on a regeneration enable signal and a particulate filter (PF) temperature signal, wherein post-injected fuel is supplied to a fuel injection system during both of the first post-injection mode and the second post-injection mode; and a second electronic circuit configured to select one of N ramp rate tables based on the selected one of the first post-injection mode and the second post-injection mode and generate a post-injected fuel signal based on the selected one of the N ramp rate tables, an ambient temperature signal and the PF temperature signal, wherein the post-injected fuel signal is generated to control a ramp-up rate of an amount of post-injection fuel to be supplied via the fuel injection system, and where N is an integer greater than 1, wherein the second electronic circuit is configured to output the post-injected fuel signal to the fuel injection system, wherein the post-injected fuel signal indicates the amount of post-injection fuel to be supplied via the fuel injection system, wherein the second electronic circuit does not limit an amount of post-injection fuel supplied via the fuel injection system while operating in the first post-injection mode and based on a first one of the N ramp rate tables, and is configured to limit an amount of post-injection fuel supplied via the fuel injection system while operating in the second post-injection mode based on a second one of the N ramp rate tables.