Method for operating an internal combustion engine system
A technology for internal combustion engines and diesel engines, applied to internal combustion piston engines, charging systems, combustion engines, etc., can solve problems such as heat transfer decline and exhaust gas temperature increase
Inactive Publication Date: 2011-05-04
GM GLOBAL TECH OPERATIONS LLC
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Problems solved by technology
[0023] Such a drop in performance implies an increase in the temperature of the exhaust gas mixed with the fresh engine intake air due to a decrease in heat transfer between the exhaust gas and the cooler's coolant
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[0052] The invention will hereinafter be described with reference to a turbocharged diesel engine system. However, the invention could theoretically be applied to different diesel engine systems, and even spark ignition engine systems.
[0053] A turbocharged diesel engine system comprising: a diesel engine 1 having an intake manifold 10 and an exhaust manifold 11; an intake line 2 for delivering fresh air from the environment into the intake manifold 10; an exhaust line 3, for conveying exhaust gases from the exhaust manifold 11 to the environment; and a turbocharger 4, comprising a compressor 40 in the intake line 2, for compressing the air flow flowing therein, and in the exhaust line The turbine 41 in 3 is used to drive the compressor 40.
[0054] The turbocharged diesel engine system further comprises: an intercooler 20 downstream of the compressor 40 of the turbocharger 4 in the intake line 2 for cooling the air flow before it reaches the intake manifold 10; and The va...
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A method for operating an internal combustion engine system, which includes, but is not limited to a combustion engine having intake manifold and exhaust manifold, a first EGR route (50) for conveying exhaust gas from exhaust manifold to intake manifold; a second EGR route (60) configured for conveying to the intake manifold exhaust gas having lower temperature than that conveyed through the first EGR route; and regulators (52, 62, 63) for regulating the flow rate of exhaust gas through the first and the second EGR route. The method includes: determining a first setpoint value for the total amount of exhaust gas requested into the intake manifold, determining a second setpoint value for a parameter representative of the relationship between the total amount of exhaust gas requested into the intake manifold, the amount of exhaust gas from the first EGR route and from the second EGR route, applying said first and second set-point values to a control routine for adjusting the regulating means accordingly, determining a third setpoint value for the temperature in the intake manifold, determining the actual temperature in the intake manifold, calculating the error between said actual temperature and the third setpoint value, and using said error for generating a correction index to be applied to the second setpoint value, in order to minimize said error.
Description
technical field [0001] The invention relates to a method for operating an internal combustion engine system, in particular a turbocharged diesel engine system. Background technique [0002] A turbocharged diesel engine system typically includes: a diesel engine having an intake manifold and an exhaust manifold; an intake line for delivering fresh air from the environment into the intake manifold; an exhaust line for the delivery of exhaust gases from the exhaust manifold to the environment; and the turbocharger, comprising a compressor in the intake line for compressing the air flow flowing therein, and a turbine in the exhaust line for driving the compressor. [0003] Turbocharged diesel engine systems also include: an intercooler, downstream of the compressor in the intake line, to cool the airflow before it reaches the intake manifold; and a diesel oxidation catalyst (DOC), in the exhaust Downstream of the turbine in the pipeline, it is used to degrade residual hydrocar...
Claims
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Login to View More IPC IPC(8): F02M25/07F02D41/26
CPCF02B3/06F02B29/0406F02D41/0007F02D41/0052F02D41/0072F02D2041/0067F02D2200/0414F02M26/05F02M26/06F02M26/10F02M26/24F02M26/38F02M26/42Y02T10/12Y02T10/40F02D41/0047F02M26/07F02M2026/001
Inventor 费德里科·L·古格利尔蒙费德里科·费列罗
Owner GM GLOBAL TECH OPERATIONS LLC