Abstract: A pressure control valve assembly comprising a rubber diaphragm to which is applied the negative pressure of the engine intake manifold and the exhaust gas pressure of the engine exhaust manifold. The diaphragm of the present invention is formed with a gradual descent sloping down from a valve-actuating central portion to an outer periphery. Adjacent to one portion of the outer periphery of the diaphragm a port opening to the outside of the valve assembly is provided. Thus, any gas ingredients such as condensed water can be expelled along the descent of the diaphragm via the port without gathering on the diaphragm surface which will therefore be free from objectionable oxidation or corrosion.

Abstract: A temperature responsive valve construction comprises a housing member having an inlet and an outlet formed therein and carrying a resilient valve seat that is adapted to interconnect the inlet with the outlet when the valve seat is open, and a one piece magnetic bimetallic snap disc closing the valve seat by snapping directly against the valve seat when sensing a certain temperature and opening the valve seat by snapping away from the valve seat when sensing another temperature. The bimetallic snap disc is held by an adjacent magnet member so that the bimetallic snap disc is held so as to be able to operate surely and completely and the valve construction can be assembled in easy manner.

Abstract: A pneumatic pressure responsive valve assembly for a pneumatic control system in a vehicle includes a power piston movable due to the pneumatic pressure difference between atmospheric pressure and a signaling vacuum pressure, which piston comprises a valve member cooperable with a valve seat. The valve member is slidably mounted with respect to the power piston. A weak spring disposed between the valve member and the power piston normally seats the valve member on the valve seat and movement of the power piston will unseat the valve member to provide a pneumatic control function.

Abstract: An ignition timing adjuster for an internal combustion engine improves its exhaust gas quality.It has a housing consisting of three housing elements rigidly united together one after another. The second or middle housing element has an axial bore for slidably guiding stem portion of a stem valve. A resilient valve is mounted on the stem valve for on-off control of the axial bore.A second axial bore is formed through the stem valve and a porous orifice valve is fixedly mounted within this second bore.

Abstract: A temperature responsive valve assembly including a body having an inlet port and first and second outlet ports, a thermostatic bimetal disk disposed within the body and responsive to a variation in temperature to change the curvature thereof from a first position to a second position, a valve spool following the movement of the bimetal disk and having first and second valve portions, an adjusting member secured to the valve spool at a proper position and arranged to be engageable with the bimetal disk, a first seat member disposed within a first passage between the inlet port and the first outlet port, the first seat member engageable with the first valve portion of the valve spool to thereby control the first passage, and a second seat member disposed within a second passage between the inlet port and the second outlet port, the second seat member engageable with the second valve portion of the valve spool to thereby control the second passage, and the second seat member being adjustably threaded with the b

Abstract: In an ignition timing adjusting device, a breaker plate of a distributor is held in the initial position thereof during idling of the engine and the breaker plate is temporarily moved in the retarding direction in a period of time after starts of the vehicle to positively retard the ignition timing of the engine so as to minimize the NOx emission and thereafter, instantly moved in the advancing direction upon arrival at a cruising speed of the vehicle to quickly advance the ignition timing of the engine so as to ensure good driveability of the vehicle.

Abstract: A pneumatic pressure responsive valve assembly for a pneumatic control system in a vehicle includes a power piston movable due to the pneumatic pressure difference between atmospheric pressure and a signaling vacuum pressure, which piston comprises a valve member cooperable with a valve seat. The valve member is slidably mounted with respect to the power piston. A weak spring disposed between the valve member and the power piston normally seats the valve member on the valve seat and movement of the power piston will unseat the valve member to provide a pneumatic control function.

Abstract: In an automobile engine exhaust gas cleaning system including an exhaust gas reactor which is supplied with auxiliary air for effecting combustion of unburnt constituents such as CO and HC in the exhaust gas, an air flow control device is provided for controlling the supply of the auxiliary air. The control device includes a first control valve disposed in the auxiliary air supply passage and controlled in response to the engine intake pressure so that it is opened when the engine intake vacuum is above the wide-open throttle vacuum, and a second control valve for controlling the supply of the engine intake vacuum to the first control valve in such a manner that it allows the engine intake vacuum to pass into the first control valve when the vacuum is lower than the value that is produced during deceleration and that it introduces atmospheric pressure to the first control valve when the vacuum increases to the value that is produced during deceleration.

Abstract: A vehicle brake system with anti-skid control apparatus including a master cylinder, a brake pedal operatively connected with the master cylinder and a wheel brake actuated by the fluid pressure from the master cylinder which includes a cut-off valve disposed between the master cylinder and the wheel brake for controlling communication between the master cylinder and the wheel brake, the fluid capacity of the fluid pressure circuit between the wheel brake and the cut-off valve capable of being increased or decreased, a valve for controlling the cut-off valve and for increasing or decreasing the capacity of the fluid pressure circuit according to the skid condition of the wheel and for selectively changing the speed of changing the capacity of the fluid pressure circuit at two steps in the capacity-decreasing direction, the system being characterized by a signal for controlling the increase or decrease of the fluid pressure circuit at high speed in the capacity-decreasing direction by the cut-off valve for a c

Abstract: A powered brake system for vehicles including wheel brake cylinders, a pump powered hydraulic pressure source, a reservoir hydraulically connected to the pump powered hydraulic pressure source, a main control valve interposed between the wheel brake cylinders and the pump powered hydraulic pressure source for controlling the fluid pressure to the wheel brake cylinders, a subcontrol valve interposed between the wheel brake cylinders and the main control valve for connecting the wheel brake cylinders to either one of the reservoir and the main control valve, and a safety valve interposed between the reservoir and the subcontrol valve for closing the communication between the reservoir and the subcontrol valve in the event of a failure of the pump powered hydraulic pressure source.

Abstract: A vapor fuel control apparatus adapted to be connected between a gasoline tank and a filter-supporting canister of a fuel supply system to an engine, comprising a main body, first valve means movably disposed within the main body and forming a first valve member therewith, second valve means movably disposed within the first valve means and forming a second valve member therewith, first spring means interposed between the main body and the first valve means urging said first valve means to move in one direction, and second spring means interposed between the first valve means and the second valve means urging said second valve means to move in the opposite direction, and both of first and second spring means holding the closing states of the first and second valve means at respective preset values.

Abstract: An actuator arranged between a hydraulic brake master cylinder and vehicle wheels for permitting the delivery therethrough of the braking pressure from the former to the latter includes solenoids responsive to signals from a computer which is adapted to sense the skidding of the wheels. Upon actuation of the solenoids, fluid pressure is no longer introduced into the actuator from a pump, as through a brake booster operatively connected to the brake pedal of the motor vehicle on the one hand and to the brake master cylinder on the other hand, so that the actuator suspends the delivery of the braking pressure to the wheels pending the cessation of the skidding. An accumulator is provided for delivering fluid pressure to the actuator, for example, in the event of the malfunctioning of the pump.