Nissan Motor Company Limited

Nobuhiro Amano

Takashi Yoshizawa

Shinobu Machida

Yuko Narisada

A pitch angle calculating device includes a height sensor 11 arranged in either one of a front position,and the rear position,separated from the front position,by a predetermined distance w, detecting either one of a front vehicle height,and a rear vehicle height,and a controller 7 calculating a pitch angle of the vehicle on the basis of the detected vehicle height,, the predetermined distance,and a designated virtual height,established as the other vehicle height,which is not detected by the height sensor 11. The designated virtual height,is corrected into a corrected height (hfk&plus;&agr;) by both number and positions of passengers on the vehicle and both weight and position of loads on the vehicle in advance of calculating the pitch angle by the controller 7. If only providing the height sensor 11 in either one of the front position,and the rear position,against changes in number and position of passengers or weight and position of loads on the vehicle, it is possible to calculate the accurate pitch angle, so that the manufacturing cost of the device can be reduced.

Pitch angle calculating device for vehicle

When a control unit receives a second ID code within a specified time after receiving a first ID code in the ID code registration mode, and decides that the first ID code is coincident with the second ID code, the control unit stores the ID code as a newly registered ID code in a storage unit.

Controller using transmitter and receiver

A keyless entry system for use with a mobile transmitter for transmitting an ID code specified therefor along with a command for vehicle door lock/unlock remote control to a control unit. The control unit is operable in an ID code registration mode for registering an ID code transmitted from the mobile transmitter. The transmitted ID code is compared with the registered ID code to permit the remote control specified by the transmitted command when the transmitted ID code is identical with the registered ID code. Upon completion of a first predetermined procedure including a plurality of sequential events of at least one first movable vehicle member provided on the vehicle, a second movable vehicle member is changed from a first position to a second position. The control unit is placed in the ID code registration mode upon the sequential occurrence of three events of (1) the second movable member is changed to the second position, (2) the ignition key is placed in a predetermined position within the key receptacle and (3) the second movable member is returned to the first position in this order.

Keyless entry system

When the opened condition of the either door is detected after the detection of the closed condition of all the doors and the detection of the locked condition of the driver seat door, the plurality of actuators are lock-driven even when the locked condition of the driver seat door is detected in the agreed judgment between the received code and the set code. A history flag setting unit is provided for setting the history flag in the locked condition of the door locking actuators of the driver seat and the opened condition of the either door of the vehicle. The keyless control unit judges whether or not the history flags are set when the door locking signal is inputted through the keyless remote control, and makes the condition locked, after having made the door locking actuators of all the seats unlocked once only when the history flag is set, and resets the history flag.

A judgment is made as to whether an ignition key is inserted into a key cylinder, and when the ignition key is inserted into the key cylinder, a keyless entry operation is forbidden. Here, a judgment is made as to whether a door on a driver's seat side is slammed shut by a driver, and when the door on the driver's seat side is slammed shut, forbiddance of locking/unlocking control is canceled according to a command signal transmitted from a transmitter.

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Ebina, Japan

Nobuhiro Amano