Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1978-08-01
1981-03-03
Braun, Leslie
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74866, 74867, B60K 4116, B60K 4106
Patent
active
042533473
ABSTRACT:
An automatic speed ratio control system of the integration servo mechanism type for a stepless transmission of an automotive vehicle. Speed ratio is controlled by a hydraulic pump motor of variable displacement type, which in turn is controlled by an actuator having a piston and a cylinder to which hydraulic oil is supplied. The system comprises a target value generator which produces a target value for an engine speed corresponding to a throttle opening or an output torque of an engine, or which produces a target value for an engine output torque corresponding to a throttle opening or an engine speed; a detector for producing a signal indicative of an engine speed or an output torque of an engine; a control signal generator for comparing the signal from the detector against the signal from the target value generator to produce a control signal in accordance with a deviation therebetween; and a controller responsive to the control signal to drive the actuator to change a speed ratio of the stepless transmission. The system is characterized by further comprising means for controlling a gain of the alteration rate of the speed ratio in response to a rotational speed of an output shaft of the stepless transmission to increase the alteration rate when the rotational speed of the output shaft is low and decrease the alteration rate when the rotational speed of the output shaft is high.
REFERENCES:
patent: 3237398 (1966-03-01), Croswhite
patent: 3641845 (1972-02-01), Uozumi
patent: 3657934 (1972-04-01), Ito
patent: 3657934 (1972-04-01), Ito et al.
patent: 3803843 (1974-04-01), Nyman et al.
patent: 3898893 (1975-08-01), Hushimoto et al.
patent: 3927528 (1975-12-01), Kolk et al.
patent: 3949627 (1976-04-01), Murakami
patent: 3958466 (1976-05-01), Espenschied
patent: 4008567 (1977-02-01), Hirsch
patent: 4039061 (1977-08-01), Pruvot et al.
patent: 4082013 (1978-04-01), Dornfeld et al.
patent: 4091690 (1978-05-01), Miyao
patent: 4131035 (1978-12-01), Mizuno et al.
patent: 4157124 (1979-06-01), Poore
Maeda Hiroaki
Mizuno Kiyofumi
Sato Masanori
Suzuki Satomi
Takahashi Shigeo
Aisin Seiki Kabushiki Kaisha
Braun Leslie
LandOfFree
Automatic speed ratio control system for stepless transmission o does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic speed ratio control system for stepless transmission o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic speed ratio control system for stepless transmission o will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-73894