Method of detecting defeat devices
First Claim
1. A method of detecting a defeat device, the method comprising:
- determining, by an engine management system (EMS), turbo operation when a turbocharger of a vehicle is operated;
determining, by the EMS, flow rate of air to be applied to an intake manifold, which includes determining which flow rate among a first flow rate of air passing through a throttle valve and a second flow rate of air measured by a hot-film air mass flow (HFM) sensor is used as the flow rate of the intake manifold;
determining, by the EMS, whether pressure in the intake manifold is in a normal range based on the flow rate of the intake manifold; and
determining, by the EMS, that the defeat device is installed when it is determined that the pressure in the intake manifold is not in the normal range, and storing information of the defeat device.
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Accused Products
Abstract
A method of detecting a defeat device includes: determining turbo operation when a turbocharger of a vehicle is operated; determining flow rate of the air to be applied to an intake manifold wherein it is determined whether which flow rate out of a first flow rate of the air passing through a throttle valve and a second flow rate of the air measured by a hot-film air mass flow (HFM) sensor is used as the flow rate of the intake manifold; determining whether pressure in the intake manifold is in a normal range based on the flow rate of the intake manifold; and determining that the defeat device is installed if it is determined that the pressure in the intake manifold is not in the normal range and storing information of the defeat device.
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Citations
10 Claims
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1. A method of detecting a defeat device, the method comprising:
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determining, by an engine management system (EMS), turbo operation when a turbocharger of a vehicle is operated; determining, by the EMS, flow rate of air to be applied to an intake manifold, which includes determining which flow rate among a first flow rate of air passing through a throttle valve and a second flow rate of air measured by a hot-film air mass flow (HFM) sensor is used as the flow rate of the intake manifold; determining, by the EMS, whether pressure in the intake manifold is in a normal range based on the flow rate of the intake manifold; and determining, by the EMS, that the defeat device is installed when it is determined that the pressure in the intake manifold is not in the normal range, and storing information of the defeat device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification