초록 ▼

A method and apparatus for quickly adjusting the coolant flow in a tuned, low-flow coolant system to maintain the temperature of air leaving an aftercooler at a desired temperature and for maintaining the temperature of an engine block within a predetermined range, during various engine loads and am

A method and apparatus for quickly adjusting the coolant flow in a tuned, low-flow coolant system to maintain the temperature of air leaving an aftercooler at a desired temperature and for maintaining the temperature of an engine block within a predetermined range, during various engine loads and ambient temperatures. The invention employs a quick-acting, proportional radiator shuttle valve to mix hot coolant from the radiator input with cool coolant from the radiator output for application to the aftercooler and a quick-acting aftercooler shuttle valve to mix cool coolant from the radiator output with coolant from the aftercooler for application to the engine block.

대표청구항 ▼

A quick-response coolant control system for a vehicle engine having a low-flow engine coolant system wherein a major portion of the coolant flows in a high-flow coolant loop containing an engine block and wherein a minor portion of the coolant fluid flows in a connected low-flow coolant loop, serial

A quick-response coolant control system for a vehicle engine having a low-flow engine coolant system wherein a major portion of the coolant flows in a high-flow coolant loop containing an engine block and wherein a minor portion of the coolant fluid flows in a connected low-flow coolant loop, serially containing various components, including a radiator and an aftercooler, comprising: a high-flow coolant loop including an engine block within the high-flow loop; a low-flow coolant loop connected to the high-flow coolant loop, including a radiator and an aftercooler for cooling engine intake air from a turbocharger; means for sensing the temperature of air leaving the aftercooler; a radiator bypass flow conduit to allow coolant fluid in the low-flow coolant loop to bypass the radiator; a quick-acting, radiator flow control valve in the low-flow loop to mix coolant from the radiator and coolant from the radiator bypass flow conduit to be applied to the aftercooler in response to a signal from the aftercooler temperature-sensing means to maintain the aftercooler at a desired temperature, whereby the compressed air in the after-cooler can be exposed quickly to greatly cooled water from the radiator in the low-flow loop in response to changes in engine load conditions; an aftercooler bypass flow conduit to allow coolant fluid in the low-flow coolant loop to bypass the aftercooler; means for sensing the temperature of coolant in the engine block; and a quick-acting, proportional aftercooler shuttle valve in the low-flow coolant loop to proportionally mix coolant from the aftercooler bypass flow conduit and the aftercooler for application to the low-flow coolant loop in response to a signal from the engine block coolant temperature-sensing means to maintain the temperature of the engine block within a desired range.