Idle system blocking means

#This invention relates to a device for preventing engine dieseling and more particularly to a device which can prevent engine dieseling and also have fuel savings and emission reducing benefits.

#The problem of engine dieseling after the engine has been shut off has been long recognized. Idle system fuel and air is pulled into the hot combustion chamber such that combustion is maintained for a few seconds or longer after the engine is shut off. The present invention solves this undesirable problem.

#During engine deceleration, the high manifold vacuum developed tends to draw excessive fuel from the idle system and to interfere with the proper scavenging of exhaust gases from the combustion chamber. This results in incomplete burning and causes excess fuel use and causes excess emissions to pass into the atmosphere. The present invention also solves this problem.

#The invention will be more fully understood from the following detailed description and appended claims when taken with the drawings in which:

#FIG. 1 is a side view of the old idle jet needle valve.

#FIG. 2 is a side view of the new replacement needle valve idle assembly.

#Referring now to the drawings, FIG. 1 shows an old idle jet needle valve assembly. The idle jet needle valve 1 is comprised of tapered end 2, threaded section 3, and adjusting head means 4. The quantity of idle jet fuel mixture allowed through the idle fuel discharge port may be adjusted by the adjusting head means 4.

#FIG. 2 is a side view of the new replacement needle valve idle assembly. New replacement needle valve 5 is comprised of force means 9, threaded section 6, plunger 7, and tapered end 8 of plunger 7. Plunger 7 moves within threaded section 6. Threaded section 6 is similar to threaded section 3 of FIG. 1 in that the outer portion is adaptable to be screwed into the same female opening, as is threaded section 3 of the old idle jet needle valve 1. The new replacement needle valve 5 is therefore adaptable to be used in any carburetor which previously used the standard old idle jet needle valve 1.

#FIG. 3 shows a cross-sectional view of the new replacement needle valve idle assembly 5, showing the force means to be a solenoid 10. Electrical wiring 11 and 12 is shown connected to solenoid 10. The coil 13 of solenoid 10, when energized by the electrical wiring 11 and 12, acts upon plunger 7 and forces plunger 7 a pre-determined distance away from the idle assembly 5. When de-energized, plunger 7 returns to its normal position. Plunger head 14 is held against plunger stop 16 by spring 15 when the solenoid is de-energized. Plunger stop 16 may be simply the end cover of solenoid 10.