Vehicle performance control system
First Claim
1. A vehicle performance control system comprising pulse generator means operative for selective connection to the speedometer-odometer and tachometer-total engine revolutions takeoffs of a vehicle and to produce a series of electrical takeoff pulses in response to the operation of said vehicle takeoffs, gating means connected to the output of said pulse generator means operative to gate said series of electrical pulses over a preselected time interval, counter means operative to count up and store the instantaneous numerical value of said gated series of pulses and digital display means operative to selectively display said instantaneous numerical value of said gated pulses representing selectively the instantaneous vehicle velocity when said pulse generator means is connected to said speedometer-odometer takeoff and representing the engine rotational speed when said pulse generator means is connected to said tachometer-total engine revolutions takeoff respectively, speed limit comparator means for comparing said instantaneous numerical value with a preselected numerical value selectively representing the desirable vehicle or engine speed limits, digital speed limit setting means for presetting said preselected numerical values representing said desirable vehicle and engine speed limits respectively, said speed limit setting means includes switch means operative to place said speed limit means into a calibrate/monitor mode, whereby said desirable vehicle and engine speed limits are respectively displayed on said digital display, in said calibrate mode.
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Abstract
An electronic multi-mode vehicle performance control system selectively provides a digital display of odometer, tachometer, speedometer readings as well as other vehicle performance parameters while avoiding the disadvantages of mechanical systems which are subject to frequent breakdown. Provision is made to signal the operator of the vehicle when a preselected maximum vehicle velocity or engine rpm is being exceeded and furthermore to signal the operator when the engine rpm drops below a preset minimum level with the consequent danger of engine stall. Other vehicle parameters such as total elapsed engine revolutions is also displayed. Also provided are digital speed limit setting means for presetting the desirable vehicle and engine speed limits.
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Citations
11 Claims
- 1. A vehicle performance control system comprising pulse generator means operative for selective connection to the speedometer-odometer and tachometer-total engine revolutions takeoffs of a vehicle and to produce a series of electrical takeoff pulses in response to the operation of said vehicle takeoffs, gating means connected to the output of said pulse generator means operative to gate said series of electrical pulses over a preselected time interval, counter means operative to count up and store the instantaneous numerical value of said gated series of pulses and digital display means operative to selectively display said instantaneous numerical value of said gated pulses representing selectively the instantaneous vehicle velocity when said pulse generator means is connected to said speedometer-odometer takeoff and representing the engine rotational speed when said pulse generator means is connected to said tachometer-total engine revolutions takeoff respectively, speed limit comparator means for comparing said instantaneous numerical value with a preselected numerical value selectively representing the desirable vehicle or engine speed limits, digital speed limit setting means for presetting said preselected numerical values representing said desirable vehicle and engine speed limits respectively, said speed limit setting means includes switch means operative to place said speed limit means into a calibrate/monitor mode, whereby said desirable vehicle and engine speed limits are respectively displayed on said digital display, in said calibrate mode.
Specification