Vehicle transmission control system

Boots – shoes – and leggings

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Details

74752D, 74866, 364424, G06F 1520, B60K 4118

Patent

active

042623359

ABSTRACT:
A vehicle transmission system is provided which comprises, in combination, a vehicle transmission and an electronic control system for converting input signals thereto related to operating conditions of the transmission to output control signals for the transmission in accordance with a predetermined set of criteria. The electronic control system senses a plurality of operating conditions of the transmission and produces digital input signals in accordance therewith, and includes a microprocessor for directly monitoring the state of the digital input signals, a programmable read-only memory connected to the microprocessor, a timing set-up for directly delivering clock pulses to the microprocessor, an output arrangement, connected to the microprocessor and including a latch, for producing output control signals, an addressing unit for coordinating the operation of the programmable read-only memory and the latch under the control of the microprocessor, and a random access memory for storing the states of signals being processed and enabling arithmetical operations to be performed with the stored signal states. A movement sensor senses shaft speeds so as to produce at least one of the digital input signals. The programmable read-only memory stores a series of coded instructions for repetitively controlling the operation of the microprocessor such that, on the basis of the input signals, output signals are produced which are transmitted to electromechanical operators, e.g., solenoid valves or relays, which control the operation of the transmission.

REFERENCES:
patent: 3640156 (1972-02-01), Mori et al.
patent: 3702572 (1972-11-01), Wakamatsu et al.
patent: 3937105 (1976-02-01), Arai et al.
patent: 4033202 (1977-07-01), Ahlen et al.
patent: 4107776 (1978-08-01), Beale
patent: 4155277 (1979-05-01), Minami et al.

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