Patent ID: 8596201
Filing Date: 2013-12-03
Classification: B61C

Abstract:
1. An engine warming system comprising: a first engine fluidly connected to a dedicated first heat exchanger configured to control a temperature of coolant from the first engine; a second engine fluidly connected to a dedicated second heat exchanger configured to control a temperature of coolant from the second engine; a common heat exchanger fluidly connected to the first engine and to the second engine and configured to transfer heat between coolant from the first engine and coolant from the second engine; a first pump driven by the first engine to circulate coolant from the first engine through the first heat exchanger and the common heat exchanger; a second pump driven by the second engine to circulate coolant from the second engine through the second heat exchanger and the common heat exchanger; and at least one coolant pump driven by power generated by at least one of the first and second engines, the at least one coolant pump configured to circulate coolant from a non-operational one of the first and second engines through the common heat exchanger.