Control method of engine rapid warm-up system

Abstract

An engine rapid warm-up system includes cooling water circulating through an engine 1, a radiator 2 introducing the cooling water to be cooled, a heat accumulator 3 storing the cooling water heated by the engine 1, and a pipe 6 and a water pump 7 that circulate the cooling water through the engine 1, the radiator 2 and the heat accumulator 3. In the system, high temperature cooling water that is stored in the heat accumulator 3 is controlled to be sent to and warm up the engine 1 at engine start, heat of exhaust gas is controlled to recover so that the cooling water obtained after heat recovery is circulated through and warms up the engine 1.

1 . A control method of an engine rapid warm-up system which includes a radiator for introducing cooling water that circulates through an engine, a heat accumulator for storing the cooling water that is heated by the engine, and a pipe and a water pump that circulate the cooling water through the engine, the radiator and the heat accumulator, the control method characterized in that
 the cooling water that is stored in the heat accumulator at high temperature is sent to the engine to warm up the engine at engine start, wherein   heat of exhaust gas is recovered, and wherein   the cooling water obtained after heat recovery is circulated to the engine to warm up the engine.   
   
   
       2 . The control method of the engine rapid warm-up method according to  claim 1 , wherein
 the cooling water obtained after the heat recovery is circulated to a heater circuit to warm up a passenger chamber.   
   
   
       3 . The control method of the engine rapid warm-up method according to  claim 1 , wherein
 the cooling water is sent from the heat accumulator to the engine through the bypass pipe at the engine start.   
   
   
       4 . The control method of the engine rapid warm-up method according to any one of claims  claim 1 , wherein
 a branch pipe of a bypass pipe is connected with a downstream side of the heat accumulator, wherein   a heat recovery circuit and a heater circuit are connected with a downstream side of the branch pipe, and wherein   branch-pipe shift control of the bypass pipe and open-close control of the heat recovery circuit are carried out according to temperature change in the cooling water caused due to engine activation.   
   
   
       5 . The control method of the engine rapid warm-up system according to any one of  claim 1 , wherein
 circulation of the cooling water to a heat recovery circuit is halted after warm-up of the engine.   
   
   
       6 . The control method of the engine rapid warm-up method according to any one of  claim 1 , wherein
 high temperature cooling water is circulated to the radiator to be cooled after warm-up of the engine, and wherein   the high temperature cooling water is circulated to the heat accumulator.   
   
   
       7 . The control method of the engine rapid warm-up method according to  claim 2 , wherein
 the cooling water is sent from the heat accumulator to the engine through the bypass pipe at the engine start.   
   
   
       8 . The control method of the engine rapid warm-up method according to  claim 2 , wherein
 a branch pipe of a bypass pipe is connected with a downstream side of the heat accumulator, wherein   a heat recovery circuit and a heater circuit are connected with a downstream side of the branch pipe, and wherein   branch-pipe shift control of the bypass pipe and open-close control of the heat recovery circuit are carried out according to temperature change in the cooling water caused due to engine activation.   
   
   
       9 . The control method of the engine rapid warm-up method according to  claim 3 , wherein
 a branch pipe of a bypass pipe is connected with a downstream side of the heat accumulator, wherein   a heat recovery circuit and a heater circuit are connected with a downstream side of the branch pipe, and wherein   branch-pipe shift control of the bypass pipe and open-close control of the heat recovery circuit are carried out according to temperature change in the cooling water caused due to engine activation.   
   
   
       10 . The control method of the engine rapid warm-up system according to  claim 2 , wherein
 circulation of the cooling water to a heat recovery circuit is halted after warm-up of the engine.   
   
   
       11 . The control method of the engine rapid warm-up system according to  claim 3 , wherein
 circulation of the cooling water to a heat recovery circuit is halted after warm-up of the engine.   
   
   
       12 . The control method of the engine rapid warm-up system according to  claim 4 , wherein
 circulation of the cooling water to a heat recovery circuit is halted after warm-up of the engine.   
   
   
       13 . The control method of the engine rapid warm-up method according to  claim 2 , wherein
 high temperature cooling water is circulated to the radiator to be cooled after warm-up of the engine, and wherein   the high temperature cooling water is circulated to the heat accumulator.   
   
   
       14 . The control method of the engine rapid warm-up method according to  claim 3 , wherein
 high temperature cooling water is circulated to the radiator to be cooled after warm-up of the engine, and wherein   the high temperature cooling water is circulated to the heat accumulator.   
   
   
       15 . The control method of the engine rapid warm-up method according to  claim 4 , wherein
 high temperature cooling water is circulated to the radiator to be cooled after warm-up of the engine, and wherein   the high temperature cooling water is circulated to the heat accumulator.   
   
   
       16 . The control method of the engine rapid warm-up method according to  claim 5 , wherein
 high temperature cooling water is circulated to the radiator to be cooled after warm-up of the engine, and wherein   the high temperature cooling water is circulated to the heat accumulator.   
   
   
       17 . The control method of the engine rapid warm-up method according to  claim 7 , wherein
 a branch pipe of a bypass pipe is connected with a downstream side of the heat accumulator, wherein   a heat recovery circuit and a heater circuit are connected with a downstream side of the branch pipe, and wherein   branch-pipe shift control of the bypass pipe and open-close control of the heat recovery circuit are carried out according to temperature change in the cooling water caused due to engine activation.   
   
   
       18 . The control method of the engine rapid warm-up system according to  claim 7 , wherein
 circulation of the cooling water to a heat recovery circuit is halted after warm-up of the engine.   
   
   
       19 . The control method of the engine rapid warm-up system according to  claim 8 , wherein
 circulation of the cooling water to a heat recovery circuit is halted after warm-up of the engine.   
   
   
       20 . The control method of the engine rapid warm-up system according to  claim 9 , wherein
 circulation of the cooling water to a heat recovery circuit is halted after warm-up of the engine.