Liquid-cooled internal combustion engine with liquid-cooled cylinder head and with liquid-cooled cylinder block

摘要

One approach to provide engine cooling for an internal combustion engine includes pumping coolant from a pump output, in parallel, directly to a block and a head upper coolant jacket; flowing coolant from the block directly to a head lower coolant jacket; discharging coolant from the upper and lower jackets only to a control block; and selectively directing cooling from the control block to each of: a cabin heater; radiator bypass line; and the radiator. In this way, an increased demand for pre-warmed coolant can be met, for example in the case of low outside temperatures.

主权项

1. An engine method, comprising:
pumping coolant from a pump output, in parallel, directly to a block and a head upper coolant jacket; flowing coolant from the block directly to a head lower coolant jacket; discharging coolant from the upper and lower jackets only to a control block; flowing the coolant from the lower coolant jacket to a cabin heater, a radiator bypass, and a radiator from the control block; flowing the coolant from the upper coolant jacket to only the cabin heater from the control block; and flowing coolant from the lower coolant jacket and the upper coolant jacket to the cabin heater simultaneously.