Systems, methods and non-transitory computer-readable media for active hydraulic system warmup

Abstract

Systems, methods, and non-transitory computer-readable media for warming hydraulic oil. A system includes a pump, a valve including an open center passage, the valve being configured to return a hydraulic oil flow received from the pump to a hydraulic reservoir through the open center passage when the valve is in a first position, and pass the hydraulic oil flow to an actuator when the valve is in a work position, and processing circuitry configured to cause the hydraulic system to determine whether a current temperature of hydraulic oil is less than or equal to a target temperature, cause a position of the valve to be set to the first position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature, and cause the pump to flow the hydraulic oil to the valve.

1 . A hydraulic system, comprising:
 a pump;   a valve including an open center passage, the valve being configured to
 return a hydraulic oil flow received from the pump to a hydraulic reservoir through the open center passage when the valve is in a first position, and 
 pass the hydraulic oil flow to an actuator when the valve is in a work position; and 
   processing circuitry configured to cause the hydraulic system to
 determine whether a current temperature of hydraulic oil is less than or equal to a target temperature, 
 cause a position of the valve to be set to the first position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature, and 
 cause the pump to flow the hydraulic oil to the valve. 
   
     
     
         2 . The hydraulic system of  claim 1 , wherein the open center passage restricts the flow of the hydraulic oil such that a pressure of the hydraulic oil drops across the open center passage. 
     
     
         3 . The hydraulic system of  claim 2 , wherein the first position is a neutral position or an intermediate position, the open center passage restricting the flow of the hydraulic oil more when the valve is in the intermediate position than when the valve is in the neutral position. 
     
     
         4 . The hydraulic system of  claim 3 , wherein the intermediate position of the valve is between the neutral position and the work position. 
     
     
         5 . The hydraulic system of  claim 3 , wherein processing circuitry is configured to cause the position of the valve to be set to the neutral position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature. 
     
     
         6 . The hydraulic system of  claim 3 , wherein processing circuitry is configured to cause the position of the valve to be set to the intermediate position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature. 
     
     
         7 . The hydraulic system of  claim 1 , wherein the processing circuitry is configured to:
 cause the position of the valve to be set to the work position in response to determining that the current temperature of the hydraulic oil greater than the target temperature; and   cause the pump to flow the hydraulic oil to the actuator via the valve.   
     
     
         8 . A method, comprising:
 determining whether a current temperature of hydraulic oil is less than or equal to a target temperature;   causing a position of a valve to be set to a first position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature, the valve including an open center passage, and the valve being configured to
 return a hydraulic oil flow received from a pump to a hydraulic reservoir through the open center passage when the valve is in the first position, and 
 pass the hydraulic oil flow to an actuator when the valve is in a work position; and 
   causing the pump to flow the hydraulic oil to the valve.   
     
     
         9 . The method of  claim 8 , wherein the open center passage restricts the flow of the hydraulic oil such that a pressure of the hydraulic oil drops across the open center passage. 
     
     
         10 . The method of  claim 9 , wherein the first position is a neutral position or an intermediate position, the open center passage restricting the flow of the hydraulic oil more when the valve is in the intermediate position than when the valve is in the neutral position. 
     
     
         11 . The method of  claim 10 , wherein the intermediate position of the valve is between the neutral position and the work position. 
     
     
         12 . The method of  claim 10 , wherein the causing of the position of the valve to be set comprises causing the position of the valve to be set to the neutral position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature. 
     
     
         13 . The method of  claim 10 , wherein the causing of the position of the valve to be set comprises causing the position of the valve to be set to the intermediate position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature. 
     
     
         14 . The method of  claim 8 , further comprising:
 causing the position of the valve to be set to the work position in response to determining that the current temperature of the hydraulic oil greater than the target temperature and after the causing of the position of the valve to be set to the first position; and   causing the pump to flow the hydraulic oil to the actuator via the valve.   
     
     
         15 . A non-transitory computer-readable medium storing instructions that, when executed by at least one processor, cause the at least one processor to perform a method, the method comprising:
 determining whether a current temperature of hydraulic oil is less than or equal to a target temperature;   causing a position of a valve to be set to a first position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature, the valve including an open center passage, and the valve being configured to
 return a hydraulic oil flow received from a pump to a hydraulic reservoir through the open center passage when the valve is in the first position, and 
 pass the hydraulic oil flow to an actuator when the valve is in a work position; and 
   causing the pump to flow the hydraulic oil to the valve.   
     
     
         16 . The non-transitory computer-readable medium of  claim 15 , wherein the open center passage restricts the flow of the hydraulic oil such that a pressure of the hydraulic oil drops across the open center passage. 
     
     
         17 . The non-transitory computer-readable medium of  claim 16 , wherein the first position is a neutral position or an intermediate position, the open center passage restricting the flow of the hydraulic oil more when the valve is in the intermediate position than when the valve is in the neutral position. 
     
     
         18 . The non-transitory computer-readable medium of  claim 17 , wherein the intermediate position of the valve is between the neutral position and the work position. 
     
     
         19 . The non-transitory computer-readable medium of  claim 17 , wherein the causing of the position of the valve to be set comprises causing the position of the valve to be set to the neutral position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature. 
     
     
         20 . The non-transitory computer-readable medium of  claim 17 , wherein the causing of the position of the valve to be set comprises causing the position of the valve to be set to the intermediate position in response to determining that the current temperature of the hydraulic oil is less than or equal to the target temperature.