Service-interval display for motor vehicle and circuit for a display of this type
First Claim
1. A service-interval display for motor vehicles, which delivers a signal after a fixed distance (D) has been traversed wherein the fixed distance (D) is divided into several fixed distance intervals (id) of equal size comprisingmeans for sensing distance travelled by the vehicle anda plurality of individual signal switch means each associated with a respective fixed distance interval (id) and responsive to the means for sensing to change its switch status at the end of its respective interval (id).
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Accused Products
Abstract
A service-interval display for motor vehicles, delivers a signal after a fixed distance has been traversed, the fixed distance (D) is divided into several fixed service distance intervals (id) of equal length, and a plurality of individual signal elements, each of which changes its switch status at the end of successive intervals, is assigned to each of these intervals. The number of signal elements activated is an indication of the incremental approach to arrival at and travel beyond the fixed distance (D).
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Citations
47 Claims
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1. A service-interval display for motor vehicles, which delivers a signal after a fixed distance (D) has been traversed wherein the fixed distance (D) is divided into several fixed distance intervals (id) of equal size comprising
means for sensing distance travelled by the vehicle and a plurality of individual signal switch means each associated with a respective fixed distance interval (id) and responsive to the means for sensing to change its switch status at the end of its respective interval (id).
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24. A service-interval display for a motor vehicle for indicating vehicle travel through a predetermined distance (D) composed of a plurality of fixed distance intervals (id) comprising
first means responsive to a vehicle movement signal for indicating the distance traveled within the predetermined fixed distance (D) comprising a plurality of second means each for indicating that the vehicle is traveling through one of said fixed distance intervals (id), third means for changing the indicating status of one of said plurality of second means when the vehicle passes beyond each fixed distance interval (id), and fourth means for indicating that at least one of the predetermined distance (D) has been traversed and a fixed time (T) has occurred.
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42. Apparatus for a service-interval display for a motor vehicle comprising
first means for visually indicating service intervals, a first shift register means for generating an output signal representing distance traveled by the vehicle and supplied with an input signal when a fixed distance (id) is traveled by the vehicle, a second shift register means for generating an output signal representing time elapsed and supplied with an input signal when a fixed time interval (it) has elapsed, gating means controlling the first means in accordance with the output signals of the first and second shift registers.
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47. The method of displaying a service-interval display for motor vehicles comprising the steps of
sensing movement of the vehicle to produce a signal, modifying the signal in accordance with an engine operating characteristic, to produce clock signals, generating signals for indicating the distance traveled through a plurality of fixed distance intervals (id) within a predetermined fixed distance (D), indicating the passage of the vehicle through the fixed distance intervals in response to said generated signals, eliminating the indication representing passage of the vehicle through a fixed distance interval when the vehicle passes to a succeeding fixed distance interval and indicating that the predetermined distance (D) has been traversed.
Specification