Rough road detector at time of vehicle running

Abstract

Abstract PURPOSE:To make a fact that a vehicle is running on a rough road accurately detectable with a simple structure by operating a difference in detected values of each wheel speed detector, taking a specified frequency band only out of the operational output, and making it so as to detect a rough road running state. CONSTITUTION:In case of a device which cuts off a fuel supply in cylinder numbers selected according to a rear-wheel speed representing the car speed by an engine output controller 27 when a fact that a vehicle is running on a rough road is detected by a rough road detector 29, this detector 29 is constituted of an arithmetic circuit 30, inputting each output of two rear-wheel speed detectors Srl and Srr and operating a difference in both rear-wheel speeds, a filter 31, taking only a component of a specified frequency band out of the operational output, a high select circuit 35, selecting a higher side in these rear-wheel speeds and a detector 36. And, this circuit 36 is constituted so as to detect that the vehicle is running on the rough road at a time when the time mean value of a constant frequency band in the difference of these rear- wheel speeds exceeds the reference value.

Inventors

• 👤 Shiyuuji Shiraishi
• 👤 Takashi Nishihara
• 👤 Hiromoto Kirio
• 👤 Naoki Omomo

Bibliographic Details