Method for local boiling protection of a heat exchanger

摘要

Various methods and systems are provided for estimating a wall temperature in a heat exchanger and reducing the risk of boiling on a coolant side of the heat exchanger. In one embodiment, a method for an engine comprises estimating a wall temperature at a location in a heat exchanger and adjusting an engine operating parameter of an engine coupled to the heat exchanger based on the wall temperature.

主权项

1. A method, comprising:
increasing an engine speed of an engine coupled to a heat exchanger based on a wall temperature at a location in the heat exchanger while maintaining motor traction power of a traction motor, the engine speed increased up to a maximum rated speed of the engine, the wall temperature including a temperature of a wall in fluid contact with an engine coolant; and responsive to the engine speed increasing to the maximum rated speed of the engine, de-rating engine power.