Mazda Motor Corporation

Naldec Corporation

Atsushi Okamitsu

Teruo Yoshii

Hiroshi Tagawa

Kazufumi Adachi

Hiroshi Fujimoto

Tetsushi Hosokai

Fumitaka Andou

Futoshi Nishioka

Kiyoshi Sakamoto

Takahiro Inada

Tsukasa Harada

Toshio Hayashi

Shinji Mori

Manabu Takeshige

Yoshimasa Kitaki

Manabu Hirozawa

In a lock-out prevention control, in which when a portable device is locked out in a trunk room, an alarm is conducted and a latch of a trunk latch mechanism is controlled to its unlatch state without ID verification with a portable device, in the case where an operation of door lock is conducted by the portable device after a start of the alarm (step SB), the alarm is stopped (step SB) and the lock-out prevention control is prohibited. The lock-out prevention control is also prohibited when a switch located in a vehicle cabin is operated (step SB) regardless of the door lock operation by the portable device. Thereby, the vehicle security and the utility or facility can be improved.

Smart entry system for vehicle

Even if there is the ID verification confirmation of the ID signal that is transmitted in response to the request signal of the vehicle-inside transmitting antenna at the lock of the doors, the disablement of the ID code of the transmitter located inside the vehicle that has been registered at the memory is prohibited when at least one of operations of the lock switch of the transmitter that is located outside or inside the vehicle and the vehicle-inside switches is detected. Accordingly, the passenger inside the vehicle can start the engine by using the transmitter left behind in the vehicle.

An air pressure information display device of a vehicle tire has a normal air pressure storage module () for storing a normal air pressure of a tire corresponding to a tire temperature, an excessive/deficient amount detection module () for detecting the excessive/deficient amount from the normal air pressure on the basis of the stored normal air pressure, and air pressure information detected by an air pressure information detection module (), and a display control module () for controlling a display () to display the detected excessive/deficient amount. Hence, since the user is informed of the excessive/deficient amount from the normal air pressure, he or she can appropriately determine an air pressure state of a tire even when he or she does not recognize the normal air pressure.

Air pressure information display device of vehicle tire

An anti-theft system for a vehicle includes a first control unit (an ammobilizer) that makes a collation of a key code of an individual key inserted in an ignition key with a reference key code representative of an intrinsic key exclusive to an engine of the vehicle stored in an EEPROM, stores data of a result of the collation, agreement or disagreement between the two key codes, in a B/URAM, and provides a second control unit for controlling engine operation with an instruction, an approval instruction for permitting the engine to operate or a refusal instruction for prohibit the engine from operating, according to the collation result that is stored in the B/URAM.

Anti-theft system for vehicle

An anti-vehicle-thief apparatus registers specific ID codes of a plurality of keys, and determines validity of a key, for example, in accordance with an operation of the key 1 including a transponder having one of the registered specific ID codes. The anti-vehicle-thief apparatus registers a code specific to the key and confirms an operation in which an ignition switch is turned on and off five times by using the key, where this operation is for changing the ID codes specific to the plurality of keys registered in EEPROMs. After the confirmation of the operation, ID codes specific to a plurality of new keys are successively registered, thereby preventing a third person from using the old keys, as well as making registration of the ID codes specific to the new keys easily.

Anti-vehicle-thief apparatus and code setting method of the apparatus

A vehicle antitheft system has an immobilizer unit which reads in an identification code generated by and transmitted from an ignition key of the type having a built-in signal transmitter and compares the identification code read therein with an identification code having been entered therein to transmit an encoded word when there is a presence of coincidence between these identification codes, and an engine controlling unit which reads in the encoded word transmitted from the immobilizer unit and compares the encoded word read therein and an encoded word having been entered therein to permit itself to perform control of operation of the engine when there is a presence of coincidence between these encoded words.

Method of and system for entering identification codes into vehicle

In a vehicle antitheft system having an immobilizer unit which reads in an identification code generated by and transmitted from an ignition key of the type having a built-in signal transmitter, an ID code of a first ignition key is tentatively stored in the immobilizer unit until different ID codes of first and second ignition keys are registered even in the event where ID code entry operation is interrupted before registration of the first and second keys' ID codes during an entry of the first ignition key ID code and is resumed with the second ignition key.

An anti-vehicle-thief apparatus having an immobilizer unit for comparing a specific first code received from a transponder to a stored code just after an engine is started, and when these codes are identical, outputting a second code to an EGI unit, the EGI unit for comparing the second code to a stored code, and when these codes are identical, permitting the engine to continue operation, a CPU for counting the number of times that an ignition switch power supply is turned ON and OFF during a code comparison time period, and backup RAM capable of storing the counted number of times that the ignition switch power supply is turned ON and OFF for a predetermined time period. When the ignition switch power supply is turned ON and OFF repeatedly more than a predetermined number of times, the EGI unit causes the engine to stop.

Growing community of inventors

Hiroshima, Japan

Atsushi Okamitsu