Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1998-10-15
2000-11-07
Paladini, Albert W.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
307 104, 180287, 34082531, 34082534, H04L 920
Patent
active
061441139
ABSTRACT:
An immobilizer ECU (20) compares an internally stored reference code with a key code transmitted from a key (10). An engine ECU (24) transmits a rolling code A when an engine speed reaches 500 rpm. The immobilizer ECU (20) transmits a rolling code B when the codes coincide with each other. The engine ECU (24) will stop an engine if it cannot receive the rolling code B within a prescribed period of time. Further, there is provided a counter CIMMOF which is incremented at the beginning of such a process. The counter CIMMOF is reset only when the process is normally completed. If an ignition is turned off prior to transmission and reception of the rolling codes, the counter CIMMOF will be counted up. According to a value of the counter CIMMOF, a period of waiting for the rolling code B is gradually shortened. Further, when the process is completed or a backup power supply to a backup memory (24d) is cut off, a time to transmit and receive the rolling codes is advanced. Thus, the situation where the engine will be able to start due to disconnection of a communication line or the like is prevented.
REFERENCES:
patent: 4749873 (1988-06-01), Mutoh et al.
patent: 5555863 (1996-09-01), Kokubu
patent: 5670933 (1997-09-01), Hayashi
patent: 5708308 (1998-01-01), Katayama et al.
patent: 5763958 (1998-06-01), Yamamoto et al.
patent: 5790015 (1998-08-01), Iitsuka
patent: 5796179 (1998-08-01), Honaga
Hayashi Kazuhiko
Matsumoto Satoru
Paladini Albert W.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Machine start controlling apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Machine start controlling apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Machine start controlling apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1644250