US 12,281,604 B2
Removal determination device for exhaust gas purification device
Kazuya Miyaji, Okazaki (JP); Teruhiko Miyake, Suntou-gun (JP); Tomoyuki Tsuji, Nagakute (JP); Yusuke Joh, Toyota (JP); and Yoshifumi Matsuda, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Aug. 18, 2023, as Appl. No. 18/451,947.
Claims priority of application No. 2022-140814 (JP), filed on Sep. 5, 2022.
Prior Publication US 2024/0077011 A1, Mar. 7, 2024
Int. Cl. F01N 11/00 (2006.01)
CPC F01N 11/002 (2013.01) [F01N 2550/24 (2013.01); F01N 2560/06 (2013.01); F01N 2900/1404 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A removal determination device for an exhaust gas purification device that determines a presence of the exhaust gas purification device in a casing formed on an exhaust pipe of an engine, comprising:
an input temperature sensor that detects a temperature at an upstream side of the casing;
an output temperature sensor that detects a temperature at a downstream side of the casing; and
a controller that determines the presence of the exhaust gas purification device in the casing,
wherein the controller comprises:
an engine stop time collector that collects a time from a point at which the engine is stopped to a point at which the engine is started; and
a determiner that determines the presence of the exhaust gas purification device in the casing based on an input temperature detected by the input temperature sensor and an output temperature detected by the output temperature sensor, in a case that the time from the point at which the engine is stopped to the point at which the engine is started is equal to or longer than a predetermined time, and
wherein the controller is configured to
calculate an integrated amount of an exhaust gas from a startup of the engine,
determine the presence of the exhaust gas purification device in the casing by the determiner when the integrated amount of the exhaust gas is equal to or greater than a predetermined amount,
obtain a predetermined integrated amount of the exhaust gas at which the input temperature is raised to or higher than a dew point temperature of moisture and the output temperature is decreased lower than the dew point temperature, in a case that the exhaust gas purification device is arranged in the casing, the predetermined amount including the predetermined integrated amount, and
change an operating condition of the engine when it is determined that the exhaust gas purification device is not in the casing.