Figure 4-41. Engine Coolant Heated Choke.

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Figure 4-39. Automatic Choke System.

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TM-9-8000 Principles of Automotive Vehicles Manual

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Figure 4-43. Exhaust Heat-Tube Type Choke.

TM 9-8000

Figure 4-41. Engine Coolant Heated Choke.

integrated with the choke heating system as shown in

adjustable to obtain the proper choke valve opening.

figure 4-45. This Is done by putting the choke piston Into

The lever on the choke shaft is slotted so it will not

the choke housing. As manifold vacuum pulls the piston

interfere with full choke valve opening.

open, controlled leakage around the piston allows the

(4) Two-Stage Choke Pulloff (Fig. 4-47). A

same vacuum source to pull in heated air for the choke.

variation of the choke pulloff Is the two-stage choke

(3) Remote Choke Pulloff (Flg. 4-46). The

pulloff that has a spring-loaded telescoping pull rod. The

remote choke pulloff is the most common con- figuration

choke valve, in the beginning, will be pulled open only

In current automotive design. It Is made from either

partially. As the thermostatic coil heats and relaxes, it

metal or plastic and uses a rubber diaphragm that pulls

will be overcome by the pressure of the spring on the

the choke open through linkage.

The linkage is

telescoping

pull

rod

and

choke

valve

will

Figure 4-42. Well-Type Exhaust Heated Choke

4-26