Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1989-04-14
1990-09-11
Diehl, Dwight
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74867, B60K 4106
Patent
active
049552597
ABSTRACT:
During non-shift modes of transmission operation, the line pressure is controlled according to a basic line pressure control schedule. Upon a shift being initiated it is determined if the shift is being conducted under power ON or power OFF conditions by sensing the status of an idle switch associated with the engine throttle valve. In the case of a power ON shift, first and second maps which are record solenoid valve duty cycle in terms of engine load and vehicle speed are read out of memory and sequentially used one after the other to control the line pressure during the shifting. In the case of a power OFF shift, tables recorded in terms of duty cycle and vehicle speed are fetched and used one after the other. The changing from the first map or table to the second one is determined by comparing the rotational speed ratio which exists between the input and output shafts of the transmission with a shift solenoid control schedule which relates to the type of shift and which is being conducted and which is recorded in terms of gear ratio and engine load (e.g. throttle opening).
REFERENCES:
patent: 4283970 (1981-08-01), Vukovich
patent: 4506563 (1985-03-01), Hiramatsu
patent: 4519273 (1985-05-01), Shimizu et al.
patent: 4653350 (1987-03-01), Downs et al.
patent: 4669335 (1987-06-01), Matsuoka et al.
patent: 4671139 (1987-06-01), Downs et al.
patent: 4680992 (1987-07-01), Hayasaki et al.
patent: 4718309 (1988-01-01), Moriya
patent: 4742461 (1988-05-01), Eschrich et al.
patent: 4789936 (1988-12-01), Kurihara et al.
patent: 4796490 (1989-01-01), Butts et al.
patent: 4823646 (1989-04-01), Yoshimura et al.
patent: 4838124 (1989-06-01), Hamano et al.
patent: 4882952 (1989-11-01), Kashihara et al.
Service Manual, Nissan Motor Company, 3/1987; pp. 1-90.
Diehl Dwight
Nissan Motor Co,. Ltd.
LandOfFree
Line pressure control arrangement for automatic automotive trans does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Line pressure control arrangement for automatic automotive trans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line pressure control arrangement for automatic automotive trans will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1177425