- Ford CHT engine
The letters CHT denote a particular type of 4-cylinder internal combustion
engine produced by theFord Motor Company inBrazil during the 1980s. It is a completely different engine from the CVH engine and should not be mistaken with it.The CHT ("Compound High Turbulence") engine was introduced by Ford in 1984 in the Mark 3 version of the
Ford Escort , the first of the series to be released inBrazil . It was later used in theFord Del Rey , theFord Verona (a BrazilianFord Orion ), as well as theVolkswagen Gol.The engine itself is an evolution of the very efficient
Renault Ventoux engine, which Ford inherited upon buying the BrazilianWillys /Renault plant in the late 1960s. It has 8 overhead valves OHV, of the rotating valve design.The basis of the engine was to create an internal turbulence inside the piston chambers so that a higher percent of the fuel is burnt. It was very robust and economic with modest performance compared to the competing
Volkswagen AP engine , having lower HP, but generally higher average Torque, with the bar much straighter and next to the maximum at any RPM than a similar AP engine. Torque was the CHT engine advantage, being capable to run without much loss of power in very low or high RPM.It was unusual in being available in an alcohol-fuelled version, which generated at least 10% more power than the petrol model, with about 25% increase on the fuel consumption. It had no problems at all for cold starts and high fuel consumption unlike the cars of major competitor General Motors had at that time.
Three models were originally available:
* 1.6 petrol (65 hp)
* 1.6 alcohol (74 hp)
* 1.6 XR alcohol (83 hp) for the Escort XR3Later, the engine was modified for better HP and efficience:
* 1.6 petrol (74 hp)
* 1.6 alcohol (86 hp)In 1987, with the release of the Mark 4
Ford Escort , this engine benefited from some revisions, resulting in the CHT E-Max (maximised economy) version. All the new models featured better torque.In 1992, a smaller version was released for the Escort and the Gol:
* 1.0 petrol (50 hp)During the
Autolatina period (1987-1996) VW used this engine, naming it AE-1600 and AE-1000, but it is basically the same engine. AE = Alta Economia (High Economy).The CHT 1.6 2nd generation engine received the award of most economical engine of its time, capable of running 17.1 km with one liter of petrol.
In 1996 and 1997 the CHT was gradually replaced by the Volkswagen AP and the new Volkswagen AT, in the VW cars, or the newer Zetec-SE 16-valve unit and the inferior Endura-E engine, in the Ford cars.
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