Ford T Series User Manual

What is til e prin cip le of the
gasoline-driven Engine?
Answer No. 18
Gasoline when mixed with ai r and compressed is highly explosive.
An explosion is a violent expansion caused by instantaneous com -
bustion of confined gases . In the gasoline engine the mixture is
drawn into a cy lin der, where it is compressed by an advancing piston
and then exploded by an electric spark, which sends the piston vio -
lently downward, and through th e connecting rod imparts a rotary
motion to the crank shaft . (See Cut No.3.)
What ar e function s
of til e Piston s?
Answer No. 19
On the downward stroke the suction of the piston dtaws the fresh
gas from the carburetor, thtou gh the inlet pipe and valve, into the
cylinder. The upward movem e nt of the piston compresses the gas
into a very small space, betwe en the top of the piston and the depres-
sion in the cylinder head, know n as the " combustion chamber."
(The compressed gases exert a pressure of approximately 60 pounds
per square inch.) At this po int the electric spark, generated by
the magneto, explodes the gases-driving the piston downward -
thus producing the power which tu rns the crank shaft. On the
next stroke upward the piston dr i ves the exploded gas out through
the exhaust valve and pip e to the muffler. The accompanying cut
shows clearly the relative pos itions of the pistons and valves during
the different strokes.
Connecting Rod -
how removed?
Answer No. 20
It is · a Vanadium stee l rod, connecting piston and crank shaft.
Should the babb i tt bearing become worn, or burned out through
l ack of oil, a knocking in the engine will result - in which case the
entire connecting rod should be replaced. To make this replace-
ment, (1) drain oil from crank case; (2) take off cylinder head;
(3) remove detachab le pl ate on bottom of crank case; (4) disconnect
connecting rod fr om crank shaft; (5) take piston and rod out through
top of cylinder.
What is the Val ve
Arrangement?
Answer No. 21
One intake and one exhaust valve are located in eac h cylinder. The
former admits the fresh gas drawn from the carburetor thro u gh the
inlet pipe-the latter permits the exploded gas to be driven out
through the ex h aust pipe. The valves are alternately opened and
closed (see Cut No.4) by the cams on the cam shaft strik in g against
pus h rods w hich in turn lift the valves from the ir seats.
I ll)

Ford T Series Specifications

General

Brand	Ford
Model	T Series
Category	Trucks
Language	English