Showing papers by "Toyota published in 1971"

Hydraulic control system for automatic transmissions

Abstract: A hydraulic control system for automatic transmissions having hydraulic servos for actuating friction engagement means comprises an oil pump for producing an oil pressure to be supplied to the servos, a pressure regulator valve for producing a desired line pressure in dependence on the speed and the output of an engine, a throttle valve for producing a throttle pressure corresponding to the throttle valve opening of the engine, a governor valve for producing a governor pressure corresponding to the engine speed, a manual valve for selectively distributing the line pressure to the servos, a 1-2 shift valve for accomplishing shift between a first and a second speed condition in dependence on the running condition of the vehicle controlled by the throttle pressure and the governor pressure, a 2-3 shift valve for accomplishing shift between the second and a third speed condition, an accumulator unit for slowing down supply of the line pressure to the servo for the third speed, a 2-3 timing valve for providing the timing of the up-shift or the down-shift between the second and third speed condition and an orifice control valve for controlling supply of the line pressure to the servo for the second speed. The supply of the line pressure to the servo for the third speed upon upshift from the second speed condition to the third speed condition is slowed down by the accumulator unit and the time for exhausting the servo for the second speed is determined by the 2-3 timing valve whereby an overlap of engagement and disengagement of the friction engagement means is provided. The overlap may be varied in dependence on the throttle pressure. Upon downshift from the third speed condition to the second speed condition, the servo for the third speed is relieved of pressure, and the 2-3 timing valve determines the time for supplying the line pressure to the servo for the second speed in dependence on the throttle pressure. Further the orifice control valve controls flow of the line pressure so that a desired overlap may be provided as in the case of upshift.

Inflatable restraint device for occupants of vehicles and the like

Abstract: An inflatable restraint device for occupants of motor vehicles and the like comprising a gas cylinder having a valve adapted to be opened by a signal from collision detection means which may be collision prediction means or collision sensing means for ejecting gas therefrom, and a gas bag adapted to be inflated by the gas ejected from said gas cylinder. Said device further comprises gas cylinder valve opening means comprising a seal for the gas cylinder made of a material which tends to undergo brittle rupture, and a rupture inducing member for inducing the brittle rupture of said seal upon receipt of a signal from the collision detection means.

Composite gas turbine set

Abstract: A composite gas turbine set comprising a large main gas turbine set and a small auxiliary gas turbine set disposed in parallel arrangement for the production of regenerative cycles. A portion of the gas issued from a compressor of the main gas turbine set is applied to a compressor of the auxiliary gas turbine set. The exhaust gas which has provided regeneration in the auxiliary gas turbine set is applied to the turbine of the main gas turbine set. The composite turbine set is arranged so as to minimize increases in fuel consumption under widely variable load conditions.

Vehicle safety device

Abstract: The disclosed apparatus detects an imminent collision between a vehicle and an object, by orienting respective receiver and transmitter antennas, mounted on the vehicle, so their patterns intersect and form a crash detecting zone just ahead of the vehicle, and by deriving the relative speed between the vehicle and the object in the crash zone from an undulatory signal radiated by the transmitter antenna and the reflected undulatory signal received from the object. A generator, a directional coupler, and a detector all associated with the antennas, derive the relative speed between the vehicle and the object on the basis of homodyne detection of the transmitted undulatory signals and the reflected undulatory signals. The presence of the objects within the crash zone is indicated by receipt of an undulatory signal above a given level. When both relative speed and level exceed their respective threshold values, threshold circuits issue signals. An AND circuit responds to the signals and actuates a safety device such as an air bag for protecting passengers. To prevent erroneous actuation of the safety device when the vehicle and the object are on course passing each other, antennas on the left and right sides of the vehicle receive reflected signals and form respective Doppler frequencies. A divider determines the relative angle between the vehicle and the object by calculating the ratio of these Doppler frequencies. When the ratio exceeds a predetermined value, comparators direct a signal to disable the AND circuit.

Vehicle automatic transmission control system

Abstract: A control system for an automatic transmission for an automotive vehicle comprising a combination of a hydraulic control section and an electrical control section The hydraulic control section includes a servo capacity control value connected to a plurality of hydraulic servos for controlling fluid pressure supplied to the hydraulic servos during a shift from one speed ratio to another by discharging a portion of fluid under pressure from at least one of the hydraulic servos or from an associated fluid passage into a pressure discharge port through an orifice, and the electrical control section includes means for controlling the operation of the servo capacity control valve depending on the running conditions of the vehicle The servo capacity control valve and the electrical control means cooperate to delicately control the rate and timing of engagement and disengagement of frictional engaging means for ensuring a smooth shift

Inflatable safety device for vehicle passengers

Abstract: A safety device for vehicle passengers, of the type in which at least one air bag is inflated responsive to detection of an object in the vehicle path in advance of contact of the vehicle with the object, includes a source of fluid under pressure and a valve, operable responsive to detection of such an object, to connect the source to a line leading to at least one inflatable air bag. A valve mechanism is interposed in the line and normally connects the line to the air bag. An impact detector is operable to detect the force of an impact, and to provide an output signal when the force has less than a predetermined magnitude. Relay means are operable responsive to the output signal, to operate the valve mechanism to disconnect the line from the air bag to interrupt inflation of the air bag and to connect the air bag to atmosphere for deflation. A timer may be included to control the time of operation of the valve mechanism by the output signal of the impact detector.

Sintered filter having straight holes therethrough

Abstract: A sintered metal, or ceramic filter having parallel, straight holes of uniform diameter and with smooth inner surfaces passing therethrough is formed by sintering a green compact about a large number of straight wires arranged parallel to one another Upon application of heat at a sintering temperature above the melting point of the wire material and less than the melting point of the sintering powders, the wires are absorbed into the pores of the sintering powders and leave holes of the same shape and size as the original wires in the resulting sintered filter

Centralized warning system for vehicles

Abstract: A centralized warning system for a vehicle comprising a fault detecting sensor mounted at each of a plurality of check points of the vehicle, an indicator operating circuit responsive to each of the sensors to indicate the presence of a fault at the check point, a logical circuit responsive to at least one indication signal from the indicator operating circuits for generating a logical output, a pulse generating circuit responsive to the logical output, a timer circuit for actuating the pulse generating circuit for a predetermined period of time, a master warning device adapted to be operated by the pulse generating circuit, forced operation means for forcibly operating the indicator operating circuits and the master warning device and checking them for faults therein, and means for terminating the forced operation of the indicator operating circuits and the master warning device during the time between the actuation of the pulse generating circuit and the moment at which the normal centralized warning function is to be activated.

Sintered alloy having wear resistance at high temperature

Abstract: A sintered alloy having improved wear resistance at high temperatures, comprising a soft, predominantly iron matrix having a Vickers hardness of 100-200 containing more than 5 but at most 20% Mo, together with 0.5-1.5% carbon and at least one additive selected from the group consisting of nickel, cobalt and chromium, with said additive constituting at most 25% by weight of said alloy, and most of said molybdenum being contained in Mo-Fe particles having a Vickers hardness of 600-1300 which are uniformly distributed within said matrix and have an average diameter of 20-70 microns.

Hydraulic control system for an automatic transmission

Abstract: A hydraulic control system contains a hydraulic pressure source for producing hydraulic pressure supplied into the hydraulic servo mechanisms of a hydraulic automatic transmission, the hydraulic pressure is conveyed through a conduit system to a manual distributing valve which distributes the hydraulic pressure in accordance with its position in the various ranges ''''P'''', ''''R'''', ''''N'''', ''''D'''' and ''''L'''', a pressure regulator valve is located in the conduit system for establishing a line pressure by regulating the hydraulic pressure from the hydraulic pressure source, a governor valve in communication with a change-over valve and with a shift valve provides a governor pressure conforming to the vehicle speed, and a throttle valve is located in the conduit system for obtaining a throttle pressure conforming to the engine throttle opening. The shift valve supplies the line pressure to the required servo mechanism by comparing the governor pressure and the throttle pressure, and the change-over valve supplies the throttle pressure to the pressure regulator valve in accordance with the governor pressure. When the manual distributing valve is in the ''''R'''' range and the engine throttle opening is extremely small, the line pressure from the manual distributing valve is discharged and controlled in the throttle valve to take out a relatively low throttle pressure. When the throttle opening exceeds a predetermined value, the throttle valve takes out the line pressure from the pressure regulator valve as it is, thus obtaining a constant high throttle pressure. When the manual distributing valve is in the ''''D'''' range, the throttle pressure is applied to the pressure regulator valve through the changeover valve. When the throttle pressure is low, the line pressure of the pressure regulator valve is reduced, and when the throttle pressure is high, the line pressure thereof is increased. Furthermore, as the governor pressure is supplied to the changeover valve, the throttle pressure applied to the pressure regulator valve at a vehicle speed below a predetermined value, is shut off by means of the changeover valve, thus obtaining a constant low line pressure. Moreover, when the manual distributing valve is shifted from the ''''D'''' to the ''''L'''' range, this valve communicates the line pressure with the pressure regulator valve and, therefore, a high line pressure is produced by the pressure regulator valve, having no relationship with the vehicle speed and the engine throttle opening.

Control system for automatic transmission

Abstract: A control system for an automatic transmission for an automotive vehicle having at least a torque converter, a planetary gear unit, brake bands and clutches actuated by hydraulic servos, a manual valve, shift valves, line pressure control means, detectors for a plurality of parameters indicative of the operating conditions of the engine, and discriminating circuits for carrying out an automatic shift from one speed ratio to another In the system, an electrically operated shift shock control valve is provided to make an on-off operation in response to a timing control signal applied from a timing controller so as to alleviate the shift shock occurring during a shift from one gear position to another

Device for inflating a safety bag for vehicle passengers

Abstract: A device for inflating a safety bag which forms a protective cushion in a vehicle for passengers includes a compressed air source which is connected to the protective air bag through two separate connecting lines. Each line is controlled by a valve which is operated either by a collision-sensing or crash detector. One of the detectors is set to operate the valve at a first condition in which a collision is sensed and it provides an inflation of a bag at a predetermined rate which is less than the passage flow rate through the second valve controlled passage. The second valve is controlled by a separate detector which is set to operate at a higher value or at a distinct collisionsensing condition, for example, at the condition of actual impact, or after a predetermined first collision condition has been achieved. The collision conditions are measured, for example, by accelerometers. The arrangement is such that both flow passages, or at least one flow passage, will provide for an air connection to the bag to provide rapid inflation of the bag to protect the passenger as necessary.

Practical method and apparatus for driving an open-end spinning frame

Abstract: Method and apparatus capable of controlling the driving speed of the open-end spinning frame utilizing a plurality of spinning units by applying at least two variable frequency electric sources. A first electric source is used for driving all spinning units for carrying out the normal spinning operation, while a second electric source is used for driving a spinning unit of yarn breakages used for carrying out the yarn piecing operation. The latter source is mounted on a carriage capable of being displaced along the spinning frame and can be stopped at a desired working position correctly.

Device for regulating pressure in the inside of a car

Abstract: A device for regulating pressure in the inside of a car comprising means for unlocking the door of the trunk of the car upon receipt of a signal from collision sensing means or collision predicting means, and communication means for establishing communication between the inside of the car and the trunk.

Anti-skid control system

Abstract: In the anti-skid system disclosed, a vehicle''s wheel is protected from skidding in response to rapid acceleration, by comparing the wheel velocity with a reference signal that follows the wheel velocity but only within a predetermined maximum rate of velocity rise, and by then attenuating the wheel''s drive to slow its acceleration According to one embodiment of the invention a wheel velocity voltage generator generates a wheel velocity signal An operational amplifier responding to the wheel velocity signal and an integrating circuit establish the reference signal that can rise up to a predetermined rate A comparator derives an output signal when the rise rate in the wheel velocity signal exceeds the maximum rise rate of the reference signal The output signal releases a free-running multivibrator that periodically interrupts power to the ignition system so the latter attenuates the wheel acceleration

Electric control apparatus for internal combustion engines

Abstract: An electronic control for the fuel injection valves or ignition timing of an internal combustion engine senses a plurality of pulses generated throughout each engine cycle including a reference pulse for each cycle. Pulses are fed to a speed load, etc., voltage conversion circuits and a plurality of counting circuits for each fuel injection valve. The counters supply an output starting signal depending on the capacity of each counter. A timing correction circuit connected to each counter determines capacity depending on engine speed, load, etc., represented by voltage from the conversion circuit to modify the duration of an electro-magnetic valve driving pulse, or trigger an ignition, for, or at, a certain time determined by the output starting signal and counter input frequency from the pulse generator.

Method and apparatus for driving open-end spinning frame

Abstract: Method and apparatus for driving open-end spinning frame by a first electric source which actuates the spinning frame at a predetermined higher speed for carrying out the normal spinning operation and by a second electric source which actuates a spinning unit of yarn break at a predetermined lower speed during the yarn piecing operation. These electric sources are variable frequency electric sources for driving at least each individual variable speed motor which is directly connected to a spinning rotor of each spinning unit at predetermined variable speed.

Fault detecting system for vehicle anti-skid control systems

Abstract: A fault detecting system for detecting faults in an anti-skid control system for vehicles which system prevents the loss of steering capacity, the abnormal spinning of the vehicle body and the like due to the locking of the wheel which occurs when an excessively large braking pressure is applied rapidly to a vehicle such as an automobile.

Safety device for an engine equipped with an exhaust gas purifier

Abstract: In an internal combustion engine equipped with an exhaust gas purifier adapted to be controlled based on the values of cooling water temperature, exhaust gas temperature and vehicle speeds detected by detectors, a safety device for the engine equipped with an exhaust gas purifier. Said safety device is characterized in that means is provided at least in a part in which temperature is elevated abnormally by abnormal operation condition of said internal combustion engine for rendering inoperative control means for said exhaust gas purifier when the elevated temperature reaches a predetermined level.

Exhaust gas cleaning device

Abstract: In an exhaust gas cleaning device for cleaning the exhaust gases of an engine mounted on a vehicle, of the type in which the exhaust gases are re-burned in an exhaust gas combustion chamber, provided intermediate of the exhaust pipe of the engine or combined with the exhaust manifold, with secondary fuel and secondary air supplied into said chamber, there are provided valve means for controlling the supply of said secondary fuel and secondary air to said combustion chamber according to the temperature of said combustion chamber, the suction vacuum of the engine and the vehicle speed, in the respective phases of the engine operation, and means for controlling the operations of said valve means.

Energy absorbing steering device

Abstract: An energy absorbing steering device for protecting vehicle drivers from the shock of impact against a steering wheel. Said device is provided with upper and lower steering shaft assemblies mounted for relative axial displacement in response to the application of axial forces, and a rigid plastic foam body. One of said assemblies includes a cylinder member having one open end and a bottom plate and the other includes a piston having a pushing surface inclined relative to the axis of said cylinder. The rigid plastic foam is disposed in the cylinder intermediate the inclined pushing surface and the bottom plate for compression upon such relative axial displacement of said assemblies. Said rigid plastic foam body has the property of relatively long and stable compressibility without spring back so that the kinetic energy of the driver's impact against the steering wheel is absorbed thereby at a predetermined load level.

Exhaust emission control device

Abstract: PROBLEM TO BE SOLVED: To provide a technique capable of reducing an exhaust emission control device in size.SOLUTION: In an exhaust emission control device 1 comprising a carrier 11 for controlling exhaust emission, a case 12 for accommodating the carrier 11 and a guide pipe 13 for guiding exhaust to the case 12, the guide pipe 13 is disposed such that a flow direction Fi of the exhaust in the guide pipe 13 is perpendicular to a flow direction Fc of the exhaust in the case 12, and a cross-sectional shape of the guide pipe 13 is a substantially elliptical shape having a minor axis in a direction parallel to the flow direction Fc of the exhaust in the case 12.

Control system for an automatic transmission

Abstract: In a vehicle automatic transmission of the type which performs the setting of shift points through electrical controls, a control system designed such that the transmission starts in the third speed under low engine load conditions, while the transmission starts in the first speed under high engine load conditions.

Constant speed control system for vehicles

Abstract: A constant speed control system for vehicles wherein the sum of pulse signals proportional in number to the actual road speed of a traveling vehicle and pulse signals proportional in number to the opening of a throttle valve in the vehicle engine are stored in a first storage circuit to provide a vehicle set speed, the sum of pulse signals proportional in number to the continually changing actual vehicle speed and pulse signals proportional in number to the throttle opening corresponding to the continually changing actual vehicle speed are stored in a second storage circuit, and the values stored in said first and second storage circuits are compared in a comparison circuit to ascertain their relative magnitude one to another, whereby the opening of the throttle valve in the vehicle engine is adjusted in accordance with the result of the comparison so as to regulate the actual vehicle speed to a vehicle set speed thereby accomplishing constant speed control of the vehicle.

Rotary shaft supporting device

Abstract: A rotary shaft supporting device comprising an annular housing, a plurality of resilient support members each arranged as a chord of one of the arcs obtained by equally dividing said annular housing, a resilient annular member disposed to contact at its outer circumferential surface the geometrical centers of said resilient support members, and a rotary shaft supporting bearing mounted on the inner circumferential surface of said resilient annular member.

Air bag safety device for vehicle passengers

Abstract: The disclosure concerns a safety device for a vehicle wherein a Doppler transmitter-receiver apparatus mounted on the vehicle and transmitting and receiving radiation from objects in the path of the vehicle forms a safety signal when the vehicle is about to crash into an object. The safety signal actuates a protective apparatus which blows up an air bag to restrain passengers in the vehicle. To test the safety device, a manual switch causes the transmitter-receiver apparatus to transmit radiation toward the vehicle''s radiator fan as the latter moves toward the radiation. The switch directs the resulting safety signal to energize an indicator lamp that shows the system to be operational.

Hydraulic control system for transmissions

Abstract: A hydraulic control system, for transmissions in which the high speed range is obtained by supplying oil under pressure into a first hydraulic servo while discharging the oil from a second hydraulic servo, and the low speed range is obtained by supplying oil under pressure to the second hydraulic servo while discharging oil from the first hydraulic servo, includes a source of hydraulic fluid under pressure, a pressure regulator valve, a governor valve, a throttle valve, a shift valve an orifice, an orifice control valve and an accumulator. The shift valve is connected to the source of regulated pressure and to exhaust, and directly controls supply and exhaust fluid relative to the first servo. The shift valve is connected through a passage having a flow restricting orifice therein to the second servo, and is also connected to the orifice control valve, which latter is in communication with the second servo. The orifice control valve has a first position blocking direct communication between the shift valve and the second servo and a second position by-passing the flow restricting orifice and establishing direct communication between the shift valve and the second servo. The orifice control valve is subjected to the throttle pressure and the pressure in the first hydraulic servo, acting in opposition. When shifting from low speed to high speed, the orifice control valve has its second position so that the pressure in the second servo is slowly decreased while the pressure in the first servo is rapidly increased. The increased pressure in the first servo moves the orifice control valve to its second position so that pressure is rapidly exhausted from the second servo after the pressure in the first servo has attained a predetermined value. In shifting from high speed to low speed, oil is rapidly discharged from the first servo to rapidly decrease the pressure therein, with the orifice control valve initially occupying its second position so that the pressure in the second servo is rapidly increased. As the pressure in the first servo decreases, the orifice control valve is moved, by the throttle pressure, back to its first position to decrease the rate of increase of the pressure in the second servo.

Roll forming apparatus

Abstract: A roll forming apparatus for impressing upon a plate corrugation of finite length. Spaced longitudinally a predetermined distance are two synchronously operated roll couples for preliminary and finish forming. Each roll couple has complementary, circumferentially discontinuous, ribs and grooves spaced axially thereof.

Vehicle seat provided with a head rest

Abstract: A seat having a head rest wherein the head rest is formed integrally with a back of the seat. Said seat comprises a reinforcement for the head rest provided on the top of a back frame, a shock absorber for the head rest formed as a unit in the shape of a bag for covering said reinforcement for the head rest and an upper portion of said back frame, and means for firmly securing said shock absorber for the head rest to the back.