摘要:
A power assist apparatus of a power assisted bicycle comprises a crank shaft (33) extending in the transverse direction of the body of the bicycle and rotatably driven by a footpedal- propelling, an electric motor for generating an assist power, a power composition shaft (84) rotatably supported and extending in parallel with the crank shaft, a footpedal- propelling power transmission mechanism (102) for transmitting the footpedal-propelling power to the power composition shaft at a right angle to the axis of the power composition shaft, an assist power transmission mechanism (101) for transmitting the assist power to the power composition shaft at a right angle to the axis of the power composition shaft in the direction opposite to the direction in which the footpedal-propelling power is transmitted, a power composition output mechanism (103) for outputting the rotating power of the power composition shaft to a driven wheel, a moment sensor for sensing a moment difference between two moments acting on the power composition shaft from two opposite directions when the footpedal-propelling power and the assist power are transmitted, and a control unit (41) for calculating the assist ratio of the assist power to the footpedal-propelling power based on the magnitude and direction of the moment difference coming in from the moment sensor (106) and controlling the output of the electric motor so that the assist ratio is kept constant.
摘要:
A power assist apparatus of a power assisted bicycle comprises a crank shaft (33) extending in the transverse direction of the body of the bicycle and rotatably driven by a footpedal- propelling, an electric motor for generating an assist power, a power composition shaft (84) rotatably supported and extending in parallel with the crank shaft, a footpedal- propelling power transmission mechanism (102) for transmitting the footpedal-propelling power to the power composition shaft at a right angle to the axis of the power composition shaft, an assist power transmission mechanism (101) for transmitting the assist power to the power composition shaft at a right angle to the axis of the power composition shaft in the direction opposite to the direction in which the footpedal-propelling power is transmitted, a power composition output mechanism (103) for outputting the rotating power of the power composition shaft to a driven wheel, a moment sensor for sensing a moment difference between two moments acting on the power composition shaft from two opposite directions when the footpedal-propelling power and the assist power are transmitted, and a control unit (41) for calculating the assist ratio of the assist power to the footpedal-propelling power based on the magnitude and direction of the moment difference coming in from the moment sensor (106) and controlling the output of the electric motor so that the assist ratio is kept constant.
摘要:
A fuel injection system (4) of an internal combustion engine of a vehicle such as motorcycle comprises a throttle body (6) of a cylindrical structure having a passage (6a) for supplying a fuel-air mixture to a combustion chamber of an engine, a disc-shaped throttle valve (8) disposed in the passage to be rotatable so as to regulate an amount of air flowing through the passage, and an injector means (10) mounted on a peripheral wall of the passage and adapted to inject fuel in the passage at a portion downstream side of the throttle valve (8) with respect to an air flow in the passage. The throttle valve is provided with a through hole (12) opened to both surface of the throttle valve, and the through hole being formed at a portion on an injector location side with respect to a rotational axis (8a) of the throttle valve so that an axis of the through hole substantially accords with a central axis (10a) of a fuel injection from the injector when observed from the injector location side.
摘要:
An antiskid brake apparatus for a vehicle comprises a braking mechanism for braking wheels of a vehicle, a master cylinder assembly operated in response to a brake operation force and adapted to brake the wheels through the braking mechanism, a sensor for detecting a rotating speed of the wheels, a direction control valve disposed on a fluid passage connecting the master cylinder assembly and the braking mechanism, a pressure reducing cylinder assembly which is operatively connected to the direction control valve, a pump unit connected through a fluid passage between the master cylinder assembly and the pressure reducing cylinder assembly for returning the hydraulic oil from the pressure reducing cylinder assembly to the master cylinder assembly, and a control unit for detecting a sign of locking of the wheels in accordance with an input from the sensor. The pressure reducing cylinder assembly has a capacity smaller than a hydraulic oil discharge capacity corresponding to a full stroke of the master cylinder assembly. A pressure cut valve is further connected to the master cylinder assembly and the pump unit through fluid passages for cutting a pump pressure of the pump unit with respect to the master cylinder assembly and the pressure cut valve is operatively connected to the braking mechanism through a fluid passage.
摘要:
An oil filtering device (1) for use in a swing-type power unit (8) of a motor bicycle (2) having a four-stroke-cycle engine (4) including a crank case (26), comprises an oil pan (12) for storing oil (11), an oil pump (18) for conveying the oil (11) in the oil pan (12) to engine portions such as a crank shaft (16) involving friction, a lubrication passage through which the oil (11) conveyed by the oil pump (18) is supplied to the engine portions involving friction, an oil strainer (22) provided in the lubrication passage (20) for first filtering the oil (11), and an oil filter (24) for further filtering the oil (11) which has been filtered by the oil strainer (22). The oil (11) to be fed to the crank shaft (16), for example, involving friction is conveyed by way of the oil strainer (22) and the oil filter (24) through the lubrication passage (20) before being supplied thereto. The oil strainer (22) and the oil filter (24) are arranged below and spaced apart from the crank shaft (16) and detachably provided on a surface of the crank case (26) composed of two halves. The swing-type power unit (8) is provided with a suspension arm (8a) having a suspension boss (29) to which the oil filter (24) is provided.