Method and Apparatus for Controlling the Starting of an Internal Combustion Engine
AssigneePerkins Engines Company Limited
InventorParesh Rameshchandra Desai
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Abstract
Starting an internal combustion engine may be difficult as a consequence of the operating conditions of the engine. Even after the engine has started, it may take a long period of time for the engine to reach operating temperatures. In the present disclosure, starting difficulty is expected for an engine with an exhaust gas recirculation system, before starting the engine an exhaust gas aftertreatment device is heated to warm residual air within the exhaust gas system.
Claims20
A method for starting an internal combustion engine which has an exhaust system comprising an exhaust gas path, an exhaust gas aftertreatment device which is in the exhaust gas path, and an exhaust gas recirculation path such that, when the engine is turned on, exhaust gas may exit the engine into the exhaust gas path and at least part of the exhaust gas which has passed through the aftertreatment device may be recirculated to the engine air intake via the exhaust gas recirculation path, the method comprising the steps of:
- when engine start is demanded, determining from at least one measured parameters whether engine start difficulty is expected;
- if engine start difficulty is expected, heating the exhaust gas aftertreatment device before starting the engine so that residual air within the exhaust gas system is waimed by the exhaust gas aftertreatment device;
- and
- starting the engine.
A controller to control the starting of an internal combustion engine which has an exhaust system comprising an exhaust gas path, an exhaust gas aftertreatment device which is in the exhaust gas path, and an exhaust gas recirculation path such that, when the engine is turned on, exhaust gas may exit the engine into the exhaust path and at least part of the exhaust gas which has passed through the aftertreatment device may be recirculated to the engine air intake via the exhaust gas recirculation path, the controller being configured to:
- when engine start is demanded, determine from at least one measured parameters whether engine start difficulty is expected;
- if engine start difficulty is expected, turn on heating of the exhaust gas aftertreatment device before starting the engine, so that residual air within the exhaust gas system is warmed by the exhaust gas aftertreatment device;
- and
- start the engine.
Dependencies are inferred from the claim text.