No title available

• US 3,630,072 A
• Filed:
• Issued:
• Est. Priority Date: 04/30/1970
• Status: Expired due to Term

• Current Assignee: N/A
• Original Assignee: N/A
• Time in Patent Office: Days
• US Class Current: 73/23.31
• CPC Class Codes: F02D 41/1451 the sensor being an optical sensor
• CPC Class Codes: G01M 15/108 using optical methods
• CPC Class Codes: G06G 7/75 for component analysis, e.g. of mixtures, of colours G06G7/122 takes precedence ; gas chromatography G01N30/00

Abstract

Method and apparatus for providing a hydrocarbon emission rating for an exhaust of an engine comprising means for adding hydrocarbon emission readings as they are generated during operation of the engine through a plurality of modes including acceleration, deceleration and cruise.

Claims

2. The apparatus of claim 1 wherein said sum indicating means comprises means responsive to said time function generating means for driving a scale whenever said capacitor means is being changed to said predetermined voltage.

3. The apparatus of claim 1 wherein said adjusting means comprises a plurality of resistors which are selectively placed in circuit with said capacitor means.

4. The apparatus of claim 1 wherein said sum indicating means comprises a synchronous motor actuable whenever said capacitor means is being changed to said predetermined voltage.

5. The apparatus of claim 1 wherein said changing means further comprises a trigger circuit actuable by said predetermined voltage for removing said changing means from said capacitor means.

6. A method of determining the hydrocarbon emissions count of an engine comprising the steps of:

a. operating the engine through one of a plurality of modes including acceleration, deceleration and cruise, b. generating a signal representative of the hydrocarbon emission count for the mode of step (a), c. storing said hydrocarbon count signal as a voltage on capacitor means, d. changing said capacitor from said stored voltage to a predetermined voltage, e. adjusting the rate of change in step (d) by a predetermined factor for the mode of step (a), f. generating a function representative of the amount of time to change the capacitor from said stored voltage to said predetermined voltage, g. displaying, in response to said time function, a representation of the hydrocarbon count of the mode of step (a) as modified by said predetermined factor, h. repeating steps (a) through (f) for another of said modes, i. displaying, in response to step (h), a representation of the sum of the hydrocarbon counts of the modes as modified by respective predetermined factors, and j. repeating steps (a) through (i) for each of the remaining modes.

7. The method of claim 6 wherein step (e) includes selectively placing one of a plurality of resistors in circuit with said capacitor means.

8. The method of claim 6 wherein step (g) comprises driving a scale whenever said capacitor means is being changed to said predetermined voltage.

9. The method of claim 6 wherein step (g) comprises actuating a synchronous motor whenever said capacitor means is being charged to said predetermined voltage.