Power plants – Internal combustion engine with treatment or handling of... – Having auxiliary device mechanically driven by exhaust gas
Patent
1978-03-31
1980-06-24
Hershkovitz, Abraham
Power plants
Internal combustion engine with treatment or handling of...
Having auxiliary device mechanically driven by exhaust gas
60281, 60547R, 60559, 91 32, F01N 504, B60T 1300
Patent
active
042088720
ABSTRACT:
A pneumatically operated brake booster comprises a hydraulic cylinder disposed within a hydraulic braking circuit connecting a master cylinder to wheel brake cylinders to increase the braking pressure trapped within the wheel brake cylinders and a servomotor for pneumatically activating the hydraulic cylinder in response to hydraulic pressure from the master cylinder. The servomotor has a spring loaded diaphgragm piston forming a negative pressure chamber and a variable pressure chamber, the former being in connection to a source of negative pressure and the latter being connected to the atmospheric pressure in response to master cylinder pressure applied to the hydraulic cylinder. The brake booster includes a control valve which is provided to selectively connect the variable pressure chamber of the servomotor to such a positive pressure source as exhaust pressure to obtain additional pressure in an emergent braking operation of the vehicle.
REFERENCES:
patent: 2705402 (1955-04-01), Stelzer
patent: 2721629 (1955-10-01), Saussard
patent: 3369364 (1968-02-01), Ayers, Jr.
patent: 3500635 (1970-03-01), Roper
patent: 3545205 (1970-12-01), Fujita
patent: 3789735 (1974-02-01), Tam
patent: 3818702 (1974-06-01), Woo
patent: 3831489 (1974-08-01), Woo
patent: 4010983 (1977-03-01), Coupland
patent: 4017125 (1977-04-01), Durling
patent: 4018485 (1977-04-01), Fannin
patent: 4116218 (1978-09-01), Acre
Horie Mitsuyuki
Shimizu Hidetoshi
Hershkovitz Abraham
Toyota Jidosha Kogyo Kabushiki Kaisha
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