Engine start control system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsShuji Nagano, Kojiro Kuramochi, Atsushi Tabata, Hatsuo Nakao
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Abstract
An engine start control system includes a starter and a motor generator capable of starting an engine. The engine start control system further includes a controller that determines the rotational resistance of the crankshaft based on cooling water temperature of the engine or viscosity of the engine oil, and then selects the starting mode of the engine by a starter motor and a motor generator based on the determination. Consequently, the startability of the engine is improved according to the state of the vehicle.
Claims12
An engine start control system, comprising a plurality of starting devices capable of starting the engine and a controller that:
- determines a viscosity of engine oil of the engine;
- selects a starting mode of the engine by the plurality of starting devices based on the determined engine oil viscosity, and
- wherein at least two of the plurality of starting devices are selected by the controller when it is estimated that the viscosity of the engine oil is equal to or greater than a predetermined value.
An engine start control system, comprising a plurality of starting devices capable of starting an engine, wherein any one of the plurality of starting devices is capable of driving functional devices other than the engine, and a controller that:
- determines drive states of the functional devices;
- and
- selects the starting mode of the engine by the plurality of starting devices based on the determined drive states.
An engine start control system, comprising a plurality of starting devices capable of starting an engine, a plurality of energy sources supplying energy to the respective plurality of starting devices, and a controller that:
- determines states of the plurality of energy sources;
- and
- selects a starting mode of the engine by the plurality of starting devices based on the determined states of the plurality of energy sources.
An engine start control system, comprising a power transmission member to which power from at least one of an engine and power sources other than the engine are provided, a plurality of starting systems capable of starting the engine, and a controller that:
- determines a difference between engine rotational speed and rotational speed of the power transmission member;
- and
- selects the starting mode of the engine by the plurality of starting systems based on the determined difference.
An engine start control system, comprising a first starting device linked to an engine by a gear transmission and capable of starting the engine by transmitting power to the engine via the gear transmission, a second starting device linked to the engine by a belt transmission and capable of starting the engine by transmitting power to the engine via the belt transmission and a controller that:
- upon starting the engine, first drives the first starting device, then drives the second starting device, and continues driving of the second starting device after driving of the first starting device is terminated.
The engine start control system according to claimed 7, wherein
- the first starting device is a starter motor which is a transmission motor of a direct current type, the second starting device is a motor generator.
An engine start control system, comprising a first starting device connected to a crankshaft of an engine, a second starting device connected to the crankshaft of the engine;
- and a controller that:
- upon starting the engine, drives the first starting device, then subsequent to initiating the driving of the first starting device, initiates driving of the second starting device before driving of the first starting device is terminated.
Dependencies are inferred from the claim text.