《HYDROSTATIC POWER TRANSMISSION》

ⅠIntroduction to Hydrostatic transmission13

Chapter 1Generation of hydrostatic power19

Section 1．1 a)Principles of hydrostatic units19

b)Compact multicylinder hydrostatic units22

1．2 a)Losses in hydrostatic units27

b)Effective torques and flows30

c)Reference values of operating variables35

d)Compressibility effects37

1．3 a)Performance of hydrostatic units41

b)Flow ripple in piston units44

c)Model laws49

1．4Experiments with hydrostatic units51

a)Full power test51

b)Cycling test with accumulator51

c)Open and bloeked port experiments51

Chapter 2Power Transmission and control61

Section 2．1 Controlled variation of output speed61

2．2 Torque multiplication and＂apparent power＂63

2．3 Clutches or couplings65

2．4 Clutch with changeable gearbox66

2．5 Very slow speed performance68

2．6 Reversing and braking of output shaft69

Chapter 3Properties of hydrostatic transmission72

Section3．1 Selection of hydrostatic circuits72

a)Constant displacement primary and secondary72

b)Variable primary with fixed secondary75

c)Variable primary and variable secondary81

d)Constant pressure variable displacement secondary81

e)Circuits for multiple primaries and secondaries84

Section3．2 Selection of hydrostatic transmission ratings87

a)Variable primary and constant secondary87

b)Adaption of variable secondaries90

3．3．Mathematical treatment of hydrostatic transmission93

a)Functional diagrams for variable primary transmission94

b)Functional diagrams with reference values98

c)Variable primary and two secondaries in parallel101

d)Variable secondary with constant primary101

e)Variable secondary with constant pressure102

3．4Experiments with hydrostatic transmissions103

a)Direct transmission test104

b)Regenerative test108

c)Free and fixed output shaft test115

Chapter 4Control of hydrostatic units and transmissions120

Section 4．1 Actuation and control120

4．2 Delivery pressure operated controls124

4．3Combined control of transmission and prime mover129

a)Engine speed selection by governor130

b)Load diagrams of i．c．engines132

c)Control for engine load lines134

4．4Servo Controls137

a)Hydrostatic transmission as part of feed-back control system137

b)Control properties of variable secondary with constant pressure140

c)Differential actuated hydrostatic transmission141

4．5Special control problems143

a)Stopping of secondary shaft143

b)Overspeed prevention of diesel engines146

Chapter 5Hydrostatic and gear transmissions149

Section 5．1 Combination of change speed gearboxes with hydrostatic transmission149

5．2 Differential split power arrangement151

5．3 Practical schemes for split power155

Chapter 6Problems related to applications158

Section6．1 Vehicle drives158

a)Wheel vehicles158

b)Tracked vehicles159

6．2 Propeller drives162

a)Hydrostatic propeller drives162

b)Hydrostatic couplings as propeller drives163

c)Speed and power of ships＇propellers166

d)Other applications of hydrostatic propeller drives167

6．3 Winch drives168

6．4 Constant speed hydrostatic drives170

Epilogue173

Appendices174

A1Application to the mathematical formulation of losses174

A2 Structural and functional diagrams in engineering175

Bibliography181

Index183