Cooling system with a coolant pump for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-2016333769-A1
Application number	US-201615155524-A
Country	US
Kind code	A1
Filing date	May 16, 2016
Priority date	May 16, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

A method is disclosed for operating a cooling system with a heater and a coolant pump for an internal combustion engine. The cooling system is switched into a predetermined operating mode as a function of a heater request and a temperature.

First claim

1 - 15 . (canceled)

16 . A method for operating a cooling system with a heater and a coolant pump for an internal combustion engine comprising switching the cooling system into a predetermined operating mode as a function of a heater request and a temperature.

17 . The method according to claim 16 , further comprising switching the cooling system based on the heater request and a reference temperature from a first warming-up operating mode in which the coolant pump is not operated into a second warming-up operating mode in which the coolant pump is operated in one of a pulsed mode or a predetermined rotational speed mode.

18 . The method according to claim 16 , further comprising switching the cooling system based on the heater request and a coolant temperature from a second warming-up operating mode in which the coolant pump is operated in one of a pulsed mode or a predetermined rotational speed mode independently of the heater request into a heater operating mode in which the coolant pump is operated with a rotational speed that is predetermined dependent on a heater request.

19 . The method according to claim 18 , further comprising controlling a valve in the heater operating mode based on the coolant temperature to direct flow through a radiator line of the cooling system in which a radiator is arranged and a bypass line of the cooling system in which an oil-coolant heat exchanger.

20 . The method according to claim 18 , further comprising switching the cooling system from the heater operating mode into the first warming-up operating mode based on the coolant temperature.

21 . The method according to claim 18 , further comprising switching the cooling system from the heater operating mode into a closed loop control operating mode in which at least one of the coolant pump and a control valve of the cooling system is controlled when a fifth warming-up condition is fulfilled.

22 . The method according to claim 16 , further comprising:
operating the coolant pump for a predetermined period of time following a starting of the internal combustion engine; and subsequently switching into a first warming-up operating mode in which the coolant pump is not operated when a first warming-up condition is fulfilled.

23 . The method according to claim 22 , further comprising subsequently switching into a closed loop control operating mode in which at least one of the coolant pump and a control valve of the cooling system is closed loop controlled when the first warming-up condition is not fulfilled.

24 . The method according to claim 23 , further comprising switching from the first warming-up operating mode into one of the closed loop control operating mode or a second warming-up operating mode in which the coolant pump is operated in one of a pulsed mode or a predetermined rotational speed mode when a second warming-up condition is fulfilled.

25 . The method according to claim 24 , further comprising:
switching from the second warming-up operating mode into the closed loop control operating mode when a third warming-up condition is fulfilled; and switching from the second warming-up operating mode into the first warming-up operating mode when a fourth warming-up condition is fulfilled.

26 . A computer program product with a program code stored on a non-transitory computer readable medium which when executed on a computer carries out the method according to claim 16 .

27 . A cooling system for an internal combustion engine comprising:
a heater; a cooling circuit having a pump in fluid communication with the heater and operably to circulate a fluid therethrough; and a controller operably coupled to the coolant circuit and configured to switch the cooling circuit into a predetermined operating mode as a function of a heater request and a temperature.

28 . The cooling system according to claim 27 , wherein the controller is further configured to switch the cooling circuit based on the heater request and a reference temperature from a first warming-up operating mode in which the pump is not operated into a second warming-up operating mode in which the pump is operated in one of a pulsed mode or a predetermined rotational speed mode.

29 . The cooling system according to claim 27 , wherein the controller is further configured to switch the cooling circuit based on the heater request and a coolant temperature from a second warming-up operating mode in which the coolant pump is operated in one of a pulsed mode or a predetermined rotational speed mode independently of the heater request into a heater operating mode in which the coolant pump is operated with a rotational speed that is predetermined dependent on a heater request.

30 . A motor vehicle comprising an internal combustion engine having a cooling system according to claim 27 .

Assignees

• Gm Global Tech Operations Llc

Inventors

• Reichenbach Mario
• Mueller Torsten
• Brinker Michael

Classifications

• F01P2007/146

  using valves · CPC title

• F01P7/14

  the coolant being liquid · CPC title

• F01P7/164 Primary

  by varying pump speed · CPC title

• F01P7/165

  characterised by systems with two or more loops · CPC title

• F01P2025/46

  Engine parts temperature · CPC title