Exhaust temperature maintenance using a parasitic load
AssigneeCaterpillar Inc.
InventorsSuman Goli, SriVidya Lavanya Kamisetty
Life of this patent
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Abstract
A power system is disclosed. The power system may include one or more memories and a controller. The controller may determine an exhaust temperature of an engine associated with a continuously variable transmission or a hybrid transmission. The controller may determine a target increase to the exhaust temperature based on the exhaust temperature failing to satisfy a threshold. The controller may determine, based on a lookup table, a target increase to a torque output of the engine based on the target increase to the exhaust temperature. The controller may cause a parasitic torque of the engine to be increased based on the target increase to the torque output.
Claims20
A method, comprising:
- identifying, by a controller, a target exhaust temperature;
- identifying, by the controller, a measured exhaust temperature of an engine operatively connected to a parasitic load;
- determining, by the controller, a target increase amount based on the target exhaust temperature and the measured exhaust temperature;
- and
- causing, by the controller and based on the target increase amount, an increase in a stroke rate of the parasitic load,
- the increase in the stroke rate of the parasitic load being caused without increasing a stroke rate of the engine.
A device, comprising:
- a controller configured to:
- identify a target exhaust temperature;
- identify a measured exhaust temperature of an engine operatively connected to a parasitic load;
- determine a target increase amount based on the target exhaust temperature and the measured exhaust temperature;
- and
- cause, based on the target increase amount, an increase in a stroke rate of the parasitic load,
- the increase in the stroke rate of the parasitic load being caused without increasing a stroke rate of the engine.
A system, comprising:
- an engine;
- a first pump operatively connected to the engine and a motor;
- a second pump operatively connected to the engine and an implement;
- and
- a controller configured to:
- identify an exhaust temperature of the engine;
- determine a target increase amount based on the exhaust temperature of the engine;
- and
- cause, based on the target increase amount, an increase in a stroke rate of the second pump,
- the increase in the stroke rate of the second pump being caused without increasing a stroke rate of the engine.
Dependencies are inferred from the claim text.