Apparatus for deciding engine-oil replacing time for an automobile
First Claim
1. An apparatus for deciding engine-oil replacing time for an automobile on the basis of input from the ignition coil comprising:
- a) a pulse input unit including a waveform shaping circuit into which is input a pulse generated by the ignition coil during the rotation of the engine of an automobile to calculate rotational frequency of the engine on the basis of said pulse;
b) a rotational frequency integration unit for receiving a signal of said pulse input unit and for producing an integrated value based on the rotational frequency of the engine, andc) a display unit into which is input the integrated value from said rotational frequency integration unit and in which a degree of oil degradation on the basis of said integrated value is displayed.
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Accused Products
Abstract
An apparatus for deciding engine-oil replacing time for an automobile. The apparatus comprises a pulse input unit into which is inputted a pulse generated during the rotation of the engine of an automobile to calculate rotational frequency of the engine on the basis of the pulse, a rotational-frequency integration unit for receiving a signal of rotational frequency of the engine output from the pulse input unit to integrate the rotational frequency of the engine, and a display unit into which is input an integrated value from the rotational-frequency integration unit and in which a degree of oil degradation on the basis of the integrated value is displayed by a display such as a LED, a liquid crystal, a 7-segment or the like.
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Citations
4 Claims
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1. An apparatus for deciding engine-oil replacing time for an automobile on the basis of input from the ignition coil comprising:
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a) a pulse input unit including a waveform shaping circuit into which is input a pulse generated by the ignition coil during the rotation of the engine of an automobile to calculate rotational frequency of the engine on the basis of said pulse; b) a rotational frequency integration unit for receiving a signal of said pulse input unit and for producing an integrated value based on the rotational frequency of the engine, and c) a display unit into which is input the integrated value from said rotational frequency integration unit and in which a degree of oil degradation on the basis of said integrated value is displayed. - View Dependent Claims (2, 3, 4)
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Specification