Fuel type based start-stop catalyst heating systems
First Claim
1. A start-stop system comprising:
- a fuel type module that determines a fuel type of a fuel supplied to an engine;
a threshold module that determines a first threshold based on the fuel type;
a temperature module that estimates a temperature of a catalyst of an exhaust system of the engine;
a comparison module that compares the temperature to the first threshold and generates a comparison signal;
a power module that adjusts power to a heating circuit based on the comparison signal, wherein the heating circuit is configured to increase the temperature of the catalyst, and wherein the power module adjusts the power to the heating circuit to increase the temperature of the catalyst when the engine is shut down; and
an engine control module that shuts down and restarts the engine to reduce idling time of the engine.
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Accused Products
Abstract
A start-stop system includes a fuel type module that determines a fuel type of a fuel supplied to an engine. A threshold module determines a first threshold based on the fuel type. A temperature module estimates a temperature of a catalyst of an exhaust system of the engine. A comparison module compares the temperature to the first threshold and generates a comparison signal. A power module adjusts power to a heating circuit based on the comparison signal. The heating circuit is configured to increase temperature of the catalyst. The power module adjusts the power to the heating circuit to increase the temperature of the catalyst when the engine is shutdown. An engine control module shuts down and restarts the engine to reduce idling time of the engine.
28 Citations
20 Claims
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1. A start-stop system comprising:
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a fuel type module that determines a fuel type of a fuel supplied to an engine; a threshold module that determines a first threshold based on the fuel type; a temperature module that estimates a temperature of a catalyst of an exhaust system of the engine; a comparison module that compares the temperature to the first threshold and generates a comparison signal; a power module that adjusts power to a heating circuit based on the comparison signal, wherein the heating circuit is configured to increase the temperature of the catalyst, and wherein the power module adjusts the power to the heating circuit to increase the temperature of the catalyst when the engine is shut down; and an engine control module that shuts down and restarts the engine to reduce idling time of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A thermal control method comprising:
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determining a fuel type of a fuel supplied to an engine of a start-stop system; determining a first threshold based on the fuel type; estimating a temperature of a catalyst of an exhaust system of the engine; generating a comparison signal based on a comparison between the temperature and the first threshold; adjusting power to a heating circuit to increase the temperature of the catalyst based on the comparison signal and when the engine is shut down, wherein the heating circuit is configured to increase the temperature of the catalyst; and shutting down and restarting the engine to reduce idling time of the engine. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification