Hydraulic engine-starting system in vehicle
First Claim
1. A hydraulic engine-starting system in a vehicle, comprising:
- an engine;
a transmission that transmits an output from said engine to driven wheels in a speed-changing manner;
a hydraulic pressure source that generates a hydraulic pressure;
an accumulator that accumulates the hydraulic pressure generated by said hydraulic pressure source;
a hydraulic motor that starts said engine;
a first oil passage that supplies oil from said accumulator to said hydraulic motor; and
a second oil passage that supplies the oil from said hydraulic motor to said transmission and/or said engine, and returns the oil therefrom to said hydraulic pressure source, wherein the oil flowing through said second oil passage is used as a working oil for said transmission and/or a lubricating oil for said engine.
1 Assignment
0 Petitions
Accused Products
Abstract
A hydraulic engine-starting system for cranking and starting an engine for a vehicle having automatically stopping and starting functions by a hydraulic motor. A hydraulic pressure that operates a hydraulic clutch of a transmission is raised promptly by using a hydraulic motor. The hydraulic motor is driven by a hydraulic pressure supplied thereto through a first oil passage from a hydraulic motor-driving device including an oil pump, an accumulator and a solenoid valve, thereby starting the engine. A transmission is disposed in the middle of a second oil passage for returning an oil discharged from the hydraulic motor to the hydraulic motor-driving device. Thus, the hydraulic pressure in the transmission can be raised simultaneously with the start of the engine to enable the engagement of a hydraulic clutch, thereby starting the vehicle promptly, while avoiding generating a shock from the engagement of the hydraulic clutch.
22 Citations
12 Claims
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1. A hydraulic engine-starting system in a vehicle, comprising:
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an engine;
a transmission that transmits an output from said engine to driven wheels in a speed-changing manner;
a hydraulic pressure source that generates a hydraulic pressure;
an accumulator that accumulates the hydraulic pressure generated by said hydraulic pressure source;
a hydraulic motor that starts said engine;
a first oil passage that supplies oil from said accumulator to said hydraulic motor; and
a second oil passage that supplies the oil from said hydraulic motor to said transmission and/or said engine, and returns the oil therefrom to said hydraulic pressure source, wherein the oil flowing through said second oil passage is used as a working oil for said transmission and/or a lubricating oil for said engine. - View Dependent Claims (2, 3, 4, 5)
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6. A hydraulic engine-starting system in a vehicle, comprising:
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an engine;
a transmission that transmits an output from said engine to driven wheels in a speed-changing manner;
a hydraulic pressure source that generates a hydraulic pressure;
an accumulator that accumulates the hydraulic pressure generated by said hydraulic pressure source;
a hydraulic motor that starts said engine;
a first oil passage that supplies an oil from said accumulator to said hydraulic motor;
a second oil passage that returns the oil from said hydraulic motor to said hydraulic pressure source; and
an oil pump that is driven by said hydraulic motor, wherein the oil supplied from said oil pump is supplied to said transmission and/or said engine and is used as a working oil for said transmission and a lubricating oil for said engine. - View Dependent Claims (7, 8, 9)
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10. A hydraulic engine-starting system in a vehicle, comprising:
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an engine;
a transmission that transmits an output from said engine to driven wheels in a speed-changing manner;
a hydraulic pressure source that generates a hydraulic pressure;
an accumulator that accumulates the hydraulic pressure generated by said hydraulic pressure source;
a hydraulic motor that starts said engine;
a first oil passage that supplies an oil from said accumulator to said hydraulic motor;
a second oil passage that returns the oil from said hydraulic motor to said hydraulic pressure source; and
an oil supply device operated by the oil flowing through said first oil passage, wherein the oil supplied from said oil supply device is supplied to said transmission and/or said engine and is used as a working oil for said transmission and/or a lubricating oil for said engine. - View Dependent Claims (11, 12)
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Specification