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Machine translation
1. (WO1980000177) ANTI-STALL CONTROL FOR ELECTRICAL HYDROSTATIC TRANSMISSION CONTROL SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000177    International Application No.:    PCT/US1979/000323
Publication Date: 07.02.1980 International Filing Date: 14.05.1979
IPC:
F02D 29/04 (2006.01), F16H 61/42 (2010.01), F16H 61/46 (2010.01)
Applicants:
Inventors:
Priority Data:
918117 22.06.1978 US
Title (EN) ANTI-STALL CONTROL FOR ELECTRICAL HYDROSTATIC TRANSMISSION CONTROL SYSTEM
(FR) COMMANDE ANTI-ARRET POUR UN SYSTEME ELECTRIQUE DE COMMANDE DE TRANSMISSION HYDROSTATIQUE
Abstract: front page image
(EN)A control system for a hydrostatic transmission of the type including an engine driven fluid pump (10) and a fluid motor (12). The control system includes a main control (34) operable in response to an electrical command signal (42) to vary the displacement of the pump, and a command signal generator (46) for generating the command signal (42). The anti-stall control (44) includes means for comparing electrical signals (54, 60) representative of engine speed and a reference speed, and generating an electrical anti-stall signal (88) representative of the maximum percentage of commanded pump displacement which is permissible without causing the engine to drop below the reference speed. The anti-stall control includes means (98) for electrically multiplying the anti-stall signal and the command signal, downstream of the shaping and rate limiting circuits. The invention provides a simple, inexpensive anti-stall control which can be adjusted to have the maximum possible gain (responsiveness) without inducing circuit instability.
(FR)Systeme de commande pour une transmission hydrostatique du type comprenant une pompe a fluide entrainee par un moteur (10) et un moteur a fluide (12). Le systeme de commande comprend une commande principale (34) fonctionnant en reponse a un signal de commande electrique (42) pour faire varier le deplacement de la pompe, et un generateur de signaux de commande (46) pour produire le signal de commande (42). La commande d"anti-arret (44) comprend des moyens pour comparer les signaux electriques (54, 60) representant la vitesse du moteur et une vitesse de reference, et pour produire un signal electrique d"anti-arret (88) representant le pourcentage maximum de deplacement de la pompe commandee qui est permis sans que le moteur ne tombe en deca de la vitesse de reference. La commande d"anticalage comprend des moyens (98) pour multiplier electriquement le signal d"anti-arret et le signal de commande, en aval des circuits de formation et de reduction. L"invention prevoit une commande d"anti-arret simple et peu couteuse qui peut etre reglee pour avoir un gain possible maximum (reponse) sans provoquer une instabilite des circuits.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)