HYBRID CATALYST CONVECTIVE PREHEATING SYSTEM
First Claim
Patent Images
1. A catalyst heating system comprising:
- a first monitoring module that monitors at least one of (i) a first temperature of a non-electrically heated catalyst (EHC) of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly;
a mode selection module configured to select an EHC heating mode and generate a mode signal based on the at least one of the first temperature and the active catalyst volume; and
an EHC control module that controls current to an EHC of the catalyst assembly based on the mode signal.
4 Assignments
0 Petitions
Accused Products
Abstract
A catalyst heating system includes a monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The monitoring module monitors at least one of (i) a first temperature of a non-EHC of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly. The mode selection module is configured to select an EHC heating mode and generate a mode signal based on the at least one of the first temperature and the active catalyst volume. The EHC control module controls current to an EHC of the catalyst assembly based on the mode signal.
-
Citations
20 Claims
-
1. A catalyst heating system comprising:
-
a first monitoring module that monitors at least one of (i) a first temperature of a non-electrically heated catalyst (EHC) of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly; a mode selection module configured to select an EHC heating mode and generate a mode signal based on the at least one of the first temperature and the active catalyst volume; and an EHC control module that controls current to an EHC of the catalyst assembly based on the mode signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A catalyst heating system comprising:
-
a first monitoring module that monitors a first temperature of a non-electrically heated catalyst (EHC) of a catalyst assembly in an exhaust system of an engine; a second monitoring module that monitors a second temperature of an EHC of the catalyst assembly; a mode selection module configured to select an engine speed maintaining mode and an air pumping mode and generates a mode signal based on the first temperature and the second temperature; and an air pumping module that initiates at least one pumping action to pump air into an inlet of the catalyst assembly during the air pumping mode, wherein the at least one pumping action includes (i) rotating a crankshaft of the engine when the engine is deactivated and (ii) activating an air pump. - View Dependent Claims (14, 15, 16)
-
-
17. A method of operating a catalyst heating system comprising:
-
monitoring at least one of (i) a first temperature of a non-electrically heated catalyst (EHC) of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly; selecting an EHC heating mode and generating a mode signal based on the at least one of the first temperature and the active catalyst volume; and controlling current to an EHC of the catalyst assembly based on the mode signal. - View Dependent Claims (18, 19, 20)
-
Specification