Tachograph and vehicle speed control device

Details Tachograph and vehicle speed control device Tachograph and vehicle speed control device

1987-10-09

1989-08-15

Chin, Gary

Boots, shoes, and leggings

180170, 180179, 123352, B60K 3100

Patent

active

048581356

ABSTRACT:
A tachograph comprises a casing (1,2) which houses a speed indicator (4), an odometer (6) and styli (8a, 8b) for respectively recording speed and distance travelled. A stepper motor (22) drives the speed indicator (4) and speed recording stylus (8a). A stepper motor (23) drives the odometer (6) and distance recording stylus (8b). A pulse generator (25) provides an input, proportional to vehicle speed, to a microprocessor (16) which computes speed and distance on the basis of the pulse input and a correction factor (26) relating to vehicle characteristics in order to drive the stepper motors (22,23). The microprocessor (16) is also responsive to a preset maximum top speed reference (27) and a driver selected top speed reference (28) to provide an output to an actuator (30) in order to control the vehicle speed.

REFERENCES:
patent: 3716700 (1973-02-01), Kelch et al.
patent: 4074196 (1978-02-01), Webster
patent: 4374422 (1983-02-01), O'Keefe, Jr. et al.
patent: 4380799 (1983-04-01), Allard et al.
patent: 4467428 (1984-08-01), Caldwell
patent: 4535865 (1985-08-01), Tanigawa et al.
patent: 4537272 (1985-08-01), Tanigawa et al.
patent: 4540060 (1985-09-01), Kawata et al.
patent: 4598370 (1986-07-01), Nakajima et al.

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