Honda Giken Kogyo Kabushiki Kaisha

Seiji Onozawa

Kunihiko Tanaka

Atsushi Ogasawara

Masahiro Kuroki

Masaaki Matsuura

Naoki Inoue

Kazumi Shibata

Kuniaki Ikui

Toshimitsu Takaishi

Shinichi Maeda

Katsutoshi Yamazaki

Takayuki Konuma

In an internal combustion engine provided with a decompression mechanism, a decompression cam that is rotatable with respect to a camshaft between first and second stop positions has a cam profile so that an exhaust valve is opened at the first stop position and is closed at the second stop position. The decompression cam is rotated in the reverse direction to the first stop position by rotating a crankshaft in the reverse direction by an electric motor at startup (position P ). Only the crankshaft is then rotated in the reverse direction (position p ), and the decompression cam is rotated in the normal direction by rotating the crankshaft in the normal direction by the electric motor. During either a compression strokes included within a range of a reverse rotation angle or the first compression stroke after initiation of normal rotation of the decompression cam until the decompression cam reaches the second stop position, the decompression cam opens the exhaust valve and increases the run-up angle of the crankshaft. The aforementioned method and device facilitates a piston overcoming the first compression top dead center decompression operation has stopped without unduly increasing the size and capacity of the required electric motor.

Starting method for internal combustion engine and starting device for the same

To smoothly perform a shift change by the actuator with a simple structure, a drive motor M as a running drive source is connected with a drive motor electronic motor unit 103 through a FET driver 107. A change motor 61 for driving a shift drum 62 is connected with a change motor electronic control unit 111 through a FET driver 112. When a drive motor electronic control unit 103 outputs the speed change signal on the basis of the detection signal of an accelerator opening sensor 106 and a drive motor rotational speed sensor 104, the output of the driver motor M is temporarily reduced or stopped to release the meshing surface pressure of the gear trains of the transmission T, and during the period thereof, a shift drum 62 is driven by the change motor 61 for performing the shift change. After completion of the shift change, the output of the drive motor M is smoothly increased.

Speed change controller for vehicle

The current ignition delay angle is increased gradually until the delay angle reaches a maximum delay angle stored in a maximum delay angle storage unit when the failure of a traction control unit is detected by a failure detecting member while a switching member is set so as to select the output of a traction control mode ignition angle calculating device. A failure control mode ignition angle calculating device calculates an ignition angle on the basis of the increased delay angle and a standard ignition angle. In case failure occurs in the traction control system during traction control operation, ignition delay angle is increased gradually to reduce the running speed of the vehicle gradually regardless of the opening of the throttle valve. Accordingly, the vehicle is not subjected to shocks attributable to the change of control mode when failure occurs in the traction control system.

Automotive traction control system

Growing community of inventors

Tokyo, Japan

Seiji Onozawa