18329624. CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE simplified abstract (TOYOTA JIDOSHA KABUSHIKI KAISHA)

CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

Organization Name

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor(s)

Toru Yaeo of Anjo-shi (JP)

Yoshifumi Matsuda of Toyota-shi (JP)

Masashi Hakariya of Nisshin-shi (JP)

Atsushi Morikawa of Toyota-shi (JP)

Ikuo Hoda of Nagoya-shi (JP)

Noriyasu Adachi of Numazu-shi (JP)

Masanori Hayashi of Toyota-shi (JP)

Kenji Igawa of Shizuoka-ken (JP)

CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18329624 titled 'CONTROLLER AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

Simplified Explanation

The abstract describes a controller for an internal combustion engine that can determine if an exhaust purification device is detached based on temperature changes.

• The controller analyzes the change in temperature of exhaust gas before and after the exhaust purification device during a fuel cutoff operation.
• If the deviation between the temperature changes is below a certain threshold, the controller determines that the exhaust purification device is detached.
• The controller can interrupt the determination process if the temperature on the upstream side of the device increases within a specific period.

Potential Applications

• Automotive industry: This technology can be used in vehicles with internal combustion engines to detect if the exhaust purification device is detached, ensuring proper functioning of emission control systems.

Problems Solved

• Detached exhaust purification devices: The technology helps identify if the exhaust purification device is detached, which can lead to increased emissions and decreased engine performance.

Benefits

• Improved emission control: By detecting detached exhaust purification devices, the controller ensures that the engine operates with an intact emission control system, reducing harmful emissions.
• Enhanced engine performance: Identifying detached exhaust purification devices allows for timely maintenance and repairs, preventing potential engine damage and optimizing performance.

Original Abstract Submitted

A controller for an internal combustion engine is configured to execute a determination process that determines that a deviation between a first change amount and a second change amount during a fuel cutoff operation is less than or equal to a threshold, and an anomaly diagnosing process that determines that an exhaust purification device is in a detached state when the determination process determines that the deviation is less than or equal to the threshold. The first change amount and the second change amount are change amounts per unit time of the temperature of exhaust gas on the upstream side and the downstream side of the exhaust purification device, respectively. The controller is configured to interrupt the determination process when the upstream-side temperature increases within a determination period.