US 12,247,509 B2
Catalyst temperature control apparatus and catalyst temperature control method
Atsushi Matsumoto, Fujisawa (JP)
Assigned to ISUZU MOTORS LIMITED, Yokohama (JP)
Filed by ISUZU MOTORS LIMITED, Yokohama (JP)
Filed on Mar. 13, 2024, as Appl. No. 18/604,277.
Claims priority of application No. 2023-049743 (JP), filed on Mar. 27, 2023.
Prior Publication US 2024/0328338 A1, Oct. 3, 2024
Int. Cl. F01N 3/20 (2006.01); F01N 3/10 (2006.01); F01N 9/00 (2006.01); F01N 11/00 (2006.01)
CPC F01N 3/208 (2013.01) [F01N 3/101 (2013.01); F01N 3/2013 (2013.01); F01N 9/005 (2013.01); F01N 11/002 (2013.01); F01N 2560/06 (2013.01); F01N 2560/07 (2013.01); F01N 2560/14 (2013.01); F01N 2900/0422 (2013.01); F01N 2900/0601 (2013.01); F01N 2900/10 (2013.01); F01N 2900/1602 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A catalyst temperature control apparatus comprising:
a processor coupled to a memory storing instructions to permit the processor to function as:
an acquiring part that acquires an exhaust temperature of an upstream side of a catalyst in an exhaust passage, an exhaust flow rate in the exhaust passage, a catalyst wall surface temperature of a wall surface of the catalyst, an outside air temperature around the catalyst, and a vehicle speed of a vehicle including the catalyst;
a calculation part that calculates an amount of heat transfer obtained by adding together i) an amount of heat that transfers from the wall surface of the catalyst to exhaust in the exhaust passage based on the exhaust temperature, the exhaust flow rate, and the catalyst wall surface temperature, and ii) an amount of heat that transfers from the wall surface of the catalyst to outside air around the catalyst based on the catalyst wall surface temperature, the outside air temperature, and the vehicle speed; and
a heater control part that causes a heater provided upstream of the catalyst to generate heat when an estimated catalyst wall surface temperature of the catalyst after a first predetermined time period from a current timing, which has been estimated on a basis of the amount of heat transfer and the catalyst wall surface temperature, is lower than a threshold.