18589453. ENGINE CONTROLLER simplified abstract (TOYOTA JIDOSHA KABUSHIKI KAISHA)

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ENGINE CONTROLLER

Organization Name

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor(s)

Kenji Inoshita of Okazaki-shi (JP)

ENGINE CONTROLLER - A simplified explanation of the abstract

This abstract first appeared for US patent application 18589453 titled 'ENGINE CONTROLLER

Simplified Explanation: The patent application describes an engine controller that adjusts the air-fuel ratio based on feedback from an air-fuel ratio sensor. The controller switches between rich and lean air-fuel ratios depending on the detected rear air-fuel ratio.

  • The controller switches the target air-fuel ratio from rich to lean when the rear air-fuel ratio is less than or equal to a rich determination value.
  • The target air-fuel ratio switches from lean to rich when the rear air-fuel ratio is greater than or equal to a lean determination value.
  • The controller adjusts the lean determination value based on the amount of overshoot of the rear air-fuel ratio after switching from rich to lean.

Key Features and Innovation:

  • Sub-feedback control of air-fuel ratio based on rear air-fuel ratio feedback.
  • Dynamic switching between rich and lean air-fuel ratios.
  • Adjustment of lean determination value based on overshoot of rear air-fuel ratio.

Potential Applications: This technology can be applied in automotive engines to optimize fuel efficiency and emissions control.

Problems Solved:

  • Efficient control of air-fuel ratio for improved engine performance.
  • Reduction of emissions by maintaining optimal air-fuel ratio.

Benefits:

  • Enhanced fuel efficiency.
  • Reduced emissions.
  • Improved engine performance.

Commercial Applications: This technology can be utilized in the automotive industry for the development of more efficient and environmentally friendly vehicles.

Prior Art: Prior research in engine control systems and air-fuel ratio feedback mechanisms can provide insights into similar technologies.

Frequently Updated Research: Stay updated on advancements in engine control systems and air-fuel ratio optimization for the latest developments in the field.

Questions about Engine Controller Technology: 1. How does the engine controller determine the optimal air-fuel ratio for different driving conditions? 2. What are the potential challenges in implementing this technology in various types of engines?


Original Abstract Submitted

An engine controller performs air-fuel ratio sub-feedback control in which a target air-fuel ratio is switched from a rich air-fuel ratio to a lean air-fuel ratio when a rear air-fuel ratio detected by an air-fuel ratio sensor becomes less than or equal to a rich determination value, and the target air-fuel ratio is switched from the lean air-fuel ratio to the rich air-fuel ratio when the rear air-fuel ratio becomes greater than or equal to a lean determination value. To perform the sub-feedback control, the controller variably sets the lean determination value to a value indicating a leaner air-fuel ratio when an amount of overshoot of the rear air-fuel ratio to a richer value than a stoichiometric air-fuel ratio after switching the target air-fuel ratio from the rich air-fuel ratio to the lean air-fuel ratio is relatively large than when the amount of overshoot is relatively small.

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