Jidosha Kiki Co., Ltd.

Bosch Braking Systems Co. Ltd.

Yuji Wachi

Ichiro Yanagawa

Shogo Ogino

Isao Kobayashi

In a brake pedal apparatus, as a brake pedal is depressed when an engaging device and a receiving portion are engaged with each other, a second lever member pivots about a second pivot pin. At this point, when the pedaling force is smaller than a threshold value, the engagement between the engaging device and the receiving portion is maintained so that the second lever member pivots about the second pivot pin. In this state, the pedal leverage is set to be a smeller ratio. As the pedaling force exceeds the threshold, the engaging device is disengaged from the receiving portion. Then, the first and second lever members are coupled by a stopper portion to pivot together about a first pivot pin. Therefore, the pedal leverage is changed to a larger ratio.

Brake pedal apparatus

A brake system,of the invention comprises a brake pedal,a booster,which boosts the input force applied by the brake pedal,and outputs the boosted force, a travel amplifying mechanism,which amplifies the travel of an output shaft of the booster,and outputs the amplified travel, a master cylinder,which develops master cylinder pressure when the output from the travel amplifying mechanism,is applied to the master cylinders,and wheel cyclinders,which develop braking forces when the master cyclinder pressure is introduced into the wheel cyclinders. By the travel amplifying mechanism,the travel of the brake pedal,in the initial stage of operation is amplified by the travel amplifying mechanism and is then transmitted to the master cylinder,whereby the idle stroke of the operating member caused by various idle portions in stroke in the brake system can be effectively shortened.

Idle stroke shortening device in brake system

The present invention relates to an exhaust gas brake system of slide type for an improvement in construction that a coupler cover member has a space chamber defined in the inner circumference of a central opening thereof through which a piston rod of a pneumatic actuator extends, the space chamber communicating to the atmosphere, through which chamber exhaust gas from an engine liable to flow to the side of the actuator is guided to be discharged to the atmosphere. Also, the invention relates to such an exhaust gas brake construction that there are provided first ring means and second ring means disposed in an alternately stacked relationship one upon the other within and along the longitudinal axis of the piston rod passing opening, the first ring means having a relatively small inner circumference clearance and a relatively large outer circumference clearance, the second ring means having a relatively large inner circumference clearance and a relatively small outer circumference clearance, whereby exhaust gas is prevented from entering into the actuator and carbon is prevented from depositing onto the piston rod.

Exhaust gas brake system

An air drier apparatus including a housing having an open bottom end, a drying agent storage casing disposed within the housing and a bottom end cover blocking the open bottom end of the housing is provided with a securing plate member which is positioned within the bottom portion of the drying agent storage casing and has a lock nut incorporated thereon. A single bolt member engages the lock nut and secures the bottom portion of the storage casing to the bottom end cover. A moisture sensing member is disposed in position within either the housing or bottom end cover in such manner as to monitor the moisture content of the compressed air existing in a purge chamber defined between the housing and the drying agent storage casing. A belt-like fixing member is placed around the outer circumference of the housing for mounting the air drier apparatus. The housing is provided with an annular projection or recess mating snugly with a complementary annular recess or projection on the inner circumference of the belt-like fixing member.

Growing community of inventors

Higashimatsuyama, Japan

Yuji Wachi