jdemaris
ArboristSite Operative
Comet saw is not a diesel engine
What is usually called a "diesel" engine, is a compression-ignition engine invented by a British guy named Clark. So, if anything, it ought to be called "Clark" fuel, not "Diesel."
A lack of air-shutter throttle is true for many "diesels", but not true for all. Some use air-governors that are controlled by a butterfly valve in the air-intake. So, the throttle is controlled by that valve opening and closing, similar to a gas engine. Many British International Harvester tractors are that way, as well as some Fordsons. They are true compression-ignition engines with air-shutter throttles.
The Coment chainsaw does not have a diesel engine. It only RUNS on diesel, as you already stated. More specifically, it is NOT a compression-ignition engine. It uses a glow plug to create ignition instead of heat from compression. Many European farm tractors use to have the same principal and were called "hot bulb" engines.
Many older US farm tractors that were sold as "all fuel" tractors also burned diesel, alcohol, distillate, etc.
A diesel cycle engine has no throttle, speed is controlled only by metering the fuel.
What is usually called a "diesel" engine, is a compression-ignition engine invented by a British guy named Clark. So, if anything, it ought to be called "Clark" fuel, not "Diesel."
A lack of air-shutter throttle is true for many "diesels", but not true for all. Some use air-governors that are controlled by a butterfly valve in the air-intake. So, the throttle is controlled by that valve opening and closing, similar to a gas engine. Many British International Harvester tractors are that way, as well as some Fordsons. They are true compression-ignition engines with air-shutter throttles.
The Coment chainsaw does not have a diesel engine. It only RUNS on diesel, as you already stated. More specifically, it is NOT a compression-ignition engine. It uses a glow plug to create ignition instead of heat from compression. Many European farm tractors use to have the same principal and were called "hot bulb" engines.
Many older US farm tractors that were sold as "all fuel" tractors also burned diesel, alcohol, distillate, etc.