18312004. ANOMALY DIAGNOSING APPARATUS AND ANOMALY DIAGNOSING METHOD FOR VEHICLE ON-BOARD INTERNAL COMBUSTION ENGINE simplified abstract (TOYOTA JIDOSHA KABUSHIKI KAISHA)

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ANOMALY DIAGNOSING APPARATUS AND ANOMALY DIAGNOSING METHOD FOR VEHICLE ON-BOARD INTERNAL COMBUSTION ENGINE

Organization Name

TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor(s)

Tomoyuki Tsuji of Nagakute-shi (JP)

Naoya Okubo of Chiryu-shi (JP)

ANOMALY DIAGNOSING APPARATUS AND ANOMALY DIAGNOSING METHOD FOR VEHICLE ON-BOARD INTERNAL COMBUSTION ENGINE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18312004 titled 'ANOMALY DIAGNOSING APPARATUS AND ANOMALY DIAGNOSING METHOD FOR VEHICLE ON-BOARD INTERNAL COMBUSTION ENGINE

Simplified Explanation

The patent application describes an internal combustion engine with a forced-induction device and a blow-by gas passage. It also includes a PCV pressure sensor that detects the pressure in the blow-by gas passage. The application proposes a diagnosing apparatus that can determine if there is an anomaly in the blow-by gas passage based on the fluctuation of the PCV pressure.

  • The patent application focuses on diagnosing anomalies in the blow-by gas passage of an internal combustion engine.
  • It introduces a forced-induction device and a PCV pressure sensor to monitor the pressure in the blow-by gas passage.
  • The application defines a specific period during which the fluctuation of the intake air amount is greater than or equal to a specified value.
  • The diagnosing apparatus calculates the fluctuation of the PCV pressure in the specific period.
  • It corrects the pressure fluctuation amount based on the fluctuation of the intake air amount.
  • Based on the corrected pressure fluctuation amount, the apparatus determines if there is an anomaly in the blow-by gas passage.

Potential Applications

  • Automotive industry: The technology can be applied to internal combustion engines in vehicles to diagnose and detect anomalies in the blow-by gas passage.
  • Engine manufacturing: Engine manufacturers can use this technology to improve the quality control of their products by identifying and resolving issues in the blow-by gas passage.

Problems Solved

  • Anomalies in the blow-by gas passage can lead to engine performance issues and increased emissions. This technology helps in early detection and diagnosis of such anomalies, allowing for timely repairs and maintenance.
  • Traditional methods of diagnosing blow-by gas passage anomalies may be time-consuming and require manual inspection. This technology provides an automated and efficient solution.

Benefits

  • Improved engine performance: By detecting and resolving anomalies in the blow-by gas passage, the technology helps maintain optimal engine performance.
  • Reduced emissions: Timely detection and repair of blow-by gas passage anomalies can help reduce harmful emissions from internal combustion engines.
  • Cost savings: Early detection and diagnosis of issues in the blow-by gas passage can prevent further damage and costly repairs.


Original Abstract Submitted

An internal combustion engine includes a forced-induction device, a blow-by gas passage, and a PCV pressure sensor detecting a pressure in the blow-by gas passage as a PCV pressure. A period during which an intake fluctuation amount, which is a fluctuation amount of an intake air amount per unit time, is greater than or equal to a specified value is defined as a specific period. The diagnosing apparatus executes a process of calculating a pressure fluctuation amount, which is a fluctuation amount of the PCV pressure in the specific period, a process of correcting the pressure fluctuation amount to a smaller value when the intake air fluctuation amount in the specific period is relatively large than when the intake air fluctuation amount is relatively small, and a process of determining, based on the corrected pressure fluctuation amount, whether there is an anomaly in the blow-by gas passage.

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