1929 WILLYS KNIGHT 56

THE SLEEVE VALVE ENGINE, RECTIFIED

1929 WILLYS KNIGHT 56

THE SLEEVE VALVE ENGINE, RECTIFIED

1929 Willys Knight 56
Front of 1929 Willys Knight 56
Hood ornament of 1929 Willys Knight 56
Back of 1929 Willys Knight 56

Production Years: 1928-1929
Country: United States
Number Produced: 37,931

One particularly unconventional engine came from America. This four-stroke engine had sleeve valves and was dubbed “The Silent Knight” after its inventor, Charles Yale Knight. In the Silent Knight there are ports, as in a normal two-stroke engine, but they are located at the top of the cylinders.

Two sleeves, internal to the cylinders, slide up and down to open and close these ports. The sleeves are connected to a small crankshaft synchronized with the main crankshaft. This system is called “desmodromic” as there are no springs and every motion is “positive”. The desmodromic system’s main advantages are silence and reliability. During the first part of the 20th century, valves were noisy and fragile.

Learn more about the Willys-Knight on Wikipedia

In 1927, the Willys-Overland range cars was expanded by the arrival of the Type 56, a comfortable sedan whose six-cylinder Silent Knight engine had a “rectifier”. This important new feature was introduced to combat the sleeve-valve’s reputation for using too much oil. Cars with Silent Knight engines always trailed a cloud of blue smoke. The solution to this problem involved forcing excess oil through holes in the cylinder wall near the exhaust port. The oil mixed with gasoline was fed to the rectifier, where the mixture was distilled in a chamber heated by exhaust gas. This process enabled oil to be returned to the crankcase while gasoline fumes went out through the exhaust pipe. Although clever and effective, the rectifier was not fitted to engines used in Europe.

You may also like:

OWEN MAGNETIC O-36 LIMOUSINE

OWEN MAGNETIC O-36 LIMOUSINE

1916 OWEN MAGNETIC O-36 TOURING

1916 OWEN MAGNETIC O-36 TOURING

1916 OWEN MAGNETIC CHASSIS

1916 OWEN MAGNETIC CHASSIS

1964 STUDEBAKER AVANTI R2

1964 STUDEBAKER AVANTI R2

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

Follow us on social media!

Please note that the vehicles shown online are part of our collection but may not be on display when you visit. Our team is always in some stage of repair or restoration on a number of vehicles.

GET IN TOUCH

 The fastest way to get in touch with us is by telephone at 727-579-8226.
If you'd like, you can complete the following form and we will get back to you at our earliest opportunity.

Tampa Bay Automobile Museum

3301 Gateway Centre Blvd.
Pinellas Park, FL 33782 USA

Museum Hours:

Monday:       10am - 4:30 pm
Tuesday:       Closed
Wednesday: 10am - 4:30 pm
Thursday:     10am - 4:30 pm
Friday:           10am - 4:30 pm
Saturday:      10am - 4:30 pm
Sunday:         Noon - 4:30 pm

Admission:

$14 General Admission
$12 Seniors (65+)
$10 Active Military and Youth (9-17 y.o.)
8 years old and under free with paid adult
Groups of 12 or More $10 per person