Lister cs tappet clearances series#

Swirling air broke up this relatively coarse spray and mixed it with air, the heavy droplets that hit the floor mostly bouncing back as a fine mist into the raging cyclone, the heat of the chamber walls rapidly vaporizing fuel that wet the surface. The injector nozzle was centrally located in the top of the chamber, with a single orifice aimed straight down to the floor. This produced a violent swirling turbulence. The piston came very close to the underside of the head, forcing nearly all of the air into a small passage that opened tangentially into a small spherical turbulence chamber.

This can be seen well in a cross-section of the Waukesha Comet truck Diesel.

Ricardo was well known for Diesel combustion chamber design as well, particularly for his 'Comet' combustion chamber. Sir Harry Ricardo had served as a consultant to Listers for some time, designing combustion chambers for the petrol engines that greatly improved their power output and efficiency. Introduced in 1930, they continued in production by Lister until 1987! And several companies in India are still producing unauthorized copies to this day! Though this might be regarded as a 'kludge' by some, the CS engines that resulted were highly successful. Lister chose to base a new Diesel engine on the proven 'L' design. During the late 1920s many manufacturers were developing small, solid-injection Diesel engines, either from new designs or by converting existing ones. It had a bore and stroke of 5 1/2' x 5 1/2'. It was made in many variations with different combustion chamber designs, speed ratings, etc., and produced anywhere from 4 to 6 1/2 BHP. The Lister L, built since 1909, was a side-valve, low-compression, spark-ignition engine.

Lister cs tappet clearances series#

Like the well-known Oldsmobile 350 V8 and Volkswagen Rabbit Diesels of the 1970s, the Lister CS series of Diesels were converted from an existing petrol (gasoline) engine. Oh, and from the Lister 3/1, 5/1, and 10/2 owner's manual. Perhaps 'familiarity breeds contempt'? This is basically what I've been able to put together through snippets from enthusiasts' sites on the Web, discussions on the Stationary Engine Lists (both on the and servers), data from my good friend Peter Forbes, David Edgington's books on the Lister petrol engines and stationary engines in general, and from a couple of old books on Diesel engines that mention Lister briefly. There's not a great deal of information available on these, despite how common they are throughout the British Commonwealth. More Lister information can be found at that site. As such the valve remains open for a shorter period of time but remains closed for longer (which explains the delayed opening).A little bit of history on the Lister cold starting Diesels from. Since there is more clearance there is a smaller contact area between the valve stem and rocker arm.

If the tappet clearance increases, the valve will have a delayed opening and an early close.

In turn, this keeps the valve open for longer as the rocker arm pushes the valve down for a longer period of time. With less clearance, we get a bigger contact area between the valve stem and rocker arm.

This is because the locker arm stays connected to the valve for a longer period of time.

If the tappet clearance decreases, the valve will open sooner and close later.

It also ensures the positive closing of the valve at all working conditions and temperatures. Purpose of Tappet Clearance: The main purpose of Tappet clearance is necessary to allow for the thermal expansion of valve spindle length at working temperature and avoid any thermal stress. Tappet Clearance Why Tappet Clearance is required?