Commer TS3
| Commer TS3 | |
|---|---|
| Overview | |
| Manufacturer | Commer |
| Combustion chamber | |
| Configuration | three-cylinder, six-piston opposed piston engine with rocker drive to a single crankshaft. |
| Displacement | 3.261 litres (200 cu in) |
| Cylinder bore | 3 ¼ inch (83 mm) |
| Piston stroke | 4 inch (102 mm) |
| Combustion | |
| Fuel type | Diesel |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 105 brake horsepower (78 kW) at 2,400 rpm |
| Torque output | 270 lb.ft at 1,200 rpm |
The Commer TS3 was a diesel engine fitted in Commer trucks built by the Rootes Group in the 1950s and 1960s. It was largely the product of Tilling-Stevens, but was developed by Rootes Group when they bought out Tilling-Stevens. The engine was the first diesel engine used by Rootes Group and was of unorthodox design.
Rootes' intention for the engine was to produce a new range of Commer trucks with the modern "cab forward" design, which required an engine low enough to mount under the driver's cab rather than in front of it as previously. Eric W Coy, Rootes' Chief Engineer, was responsible for the development of the engine by a core team of only seven people, at the Humber plant at Stoke Aldermoor. "TS" in the engine's name derives from its Tilling-Stevens origins, a company acquired by Rootes in 1950. From 1954 Rootes diesel production was moved to the Tilling-Stevens plant in Maidstone, Kent.
The engine was unusual in being an opposed piston engine where each horizontal cylinder contains two pistons, one at each end, that move in opposition to each other. Even more unusually, both sets of pistons drove only a single crankshaft; most opposed piston engines have a separate crankshaft at each end of the cylinder. The TS3 engine used a single crankshaft beneath the cylinders, each piston driving it through a connecting rod, a rocker lever and a second connecting rod. The crankshaft had six crankpins and there were six rockers.
The engine was a two-stroke, compression-ignition diesel engine with uniflow-ported cylinders.Scavenging was performed by a Roots blower. which was mounted on the front of the engine and driven by a long quill shaft from a chain drive at the rear of the engine. Although the engines gained a reputation for good performance, this quill shaft was somewhat prone to breaking if over-worked.
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Wikipedia