Determination of fuel injector performance in chassis

A method for determining a performance characteristic of a fuel injector located in an engine having a plurality of fuel injectors, comprising the steps of:

• performing a series of acceleration tests under no load conditions;
• determining a deviation in actual quantity of fuel injected from an expected quantity of fuel injected in response to the acceleration tests;
• performing a series of varying load condition tests;
• determining a quantity of fuel injected under varying load conditions in response to the varying load condition tests;
• repeating the acceleration tests for varying acceleration conditions;
• and
• determining a performance curve for the fuel injector in response to the repeated acceleration tests.

A method for determining a performance characteristic of each of a plurality of fuel injectors located in an engine, comprising the steps of:

• performing a series of acceleration tests with the engine under no load conditions to determine a deviation in actual quantity of fuel injected, from each of the fuel injectors into the engine, from an expected quantity of fuel injected for each injector;
• performing a series of performance tests on each of a plurality of engine brakes located in the engine to determine a load applied to the engine by each engine brake;
• and
• performing a series of tests under varying load condition with the engine using the determined loads applied by the engine brakes to determine a quantity of fuel injected under varying load conditions.

A method for determining a performance characteristic of each of a plurality of fuel injectors located in an engine, comprising the steps of:

• performing a series of acceleration tests under no load conditions to determine a deviation in actual quantity of fuel injected from an expected quantity of fuel injected for each injector;
• performing a series of performance tests on each of a plurality of engine brakes located in the engine to determine a load applied to the engine by each engine brake;
• and
• performing a series of varying load condition tests using the determined loads applied by the engine brakes to determine a quantity of fuel injected under varying load conditions;
• and
• determining a performance curve for each fuel injector in response to repeated iterations of at least one of the acceleration tests, the engine brake tests, and the varying load condition tests under varying engine operating conditions.