Lubrication system for an internal combustion engine, and method for lubrication
First Claim
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1. A lubrication system for an internal combustion engine, comprising:
- an oil lubricant circuit;
a radiator for cooling a lubricant;
a piston cooling jet coupled in the oil lubricant circuit;
a chemical heat accumulator arranged upstream of the engine for warming up the lubricant, the heat accumulator connected in parallel to the radiator;
a valve for switching over the lubricant circuit between the radiator and the heat accumulator; and
a controller with computer-readable instructions stored in non-transitory memory for;
operating the lubrication system in a first mode when a lubricant temperature is below a threshold;
operating the lubrication system in a second mode when the lubricant temperature is above the threshold; and
charging the chemical heat accumulator during the second mode.
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Abstract
Embodiments for a lubrication system for an internal combustion engine are provided. In one example, a lubrication system for an internal combustion engine comprises a lubricant circuit, a radiator for cooling the lubricant, a heat accumulator arranged upstream of the engine for warming up the lubricant, the heat accumulator connected in parallel to the radiator, and a valve for switching over the lubricant circuit between the radiator and the heat accumulator. In this way, the oil may be rapidly heated during cold engine start conditions.
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Citations
13 Claims
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1. A lubrication system for an internal combustion engine, comprising:
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an oil lubricant circuit; a radiator for cooling a lubricant; a piston cooling jet coupled in the oil lubricant circuit; a chemical heat accumulator arranged upstream of the engine for warming up the lubricant, the heat accumulator connected in parallel to the radiator; a valve for switching over the lubricant circuit between the radiator and the heat accumulator; and a controller with computer-readable instructions stored in non-transitory memory for; operating the lubrication system in a first mode when a lubricant temperature is below a threshold; operating the lubrication system in a second mode when the lubricant temperature is above the threshold; and charging the chemical heat accumulator during the second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for lubricating an internal combustion engine with a lubricant circuit, comprising:
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circulating a lubricant along a chemical heat accumulator in a warming up mode with a valve in a first position; switching over to the lubricant circuit into a normal mode by actuating the valve to a second position; circulating the lubricant along a radiator which is connected in parallel to the heat accumulator in the normal mode with the valve in the second position; during the warming up mode, actuating the valve to a third position in response to the chemical heat accumulator being discharged, where the third position delivers the lubricant from a pump directly to the engine without passing through the radiator or the chemical heat accumulator; recharging the heat accumulator during the normal mode in response to the heat accumulator not being charged; and delivering the lubricant to a piston cooling jet of the engine. - View Dependent Claims (11, 12, 13)
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Specification