Title of Invention

A DIESEL ENGINE WITH BALANCE SHAFT ASSISTED CRANKSHAFT

Abstract

A diesel engine with balance shaft assisted crankshaft consists of crankshaft (4), balance shaft (1), helical gears (5 & 6) and bearings (12 & 13) wherein; (a) Crankshaft (4) with balance shaft (1) is mounted inside the diesel engine (15); (b) forged helical gear (5) and detachable helical gear (6) are fitted on each end of the crankshaft (4); (c) two bearings (12 & 13) are positioned between connecting rod(ll) and rod cap(14).

Full Text

Form-2 THE PATENT ACT, 1970 COMPLETE SPECIFICATION [ Section 10] 1. A DIESEL ENGINE WITH BALANCE SHAFT ASSISTED CRANKSHAFT 2. (A) CHHAGANBHAI GORDHANBHAI DODIYA (B) Residing at Nadi Kinara, Opp. Paliyad Bus stop, Botad-364710 Gujarat, India. (c) Nationality an Indian. The following specification particularly describes the nature of the invention and the manner in which it is to be performed. GRANTED 22-9-2004 19 JAN 2004 This invention relates to A DIESEL ENGINE WITH BALANCE SHAFT ASSISTED CRANKSHAFT. Crankshaft is the main rotating member of the single cylinder diesel engine, or shaft, of the engine, with cranks to which the connecting rod is attached; converts up-and-down (reciprocating) motion into circular (rotary motion). Conventional crankshafts being used in such engines are not carefully balanced to eliminate the undue vibration resulting from the weight of the offset cranks. Also the power impulses tend to set up a twisting vibration in the crankshaft. Due to the power stroke, piston moves down on its, through the connecting rod, against a crankpin with a heavy force. This force tends to twist the crankpin ahead of the rest of the crankshaft. Then, as the force against the crankpin recedes, it tends to untwist, or move back into its original relationship with the rest of the crankshaft. This twist-untwist action, repeated with every power impulse, tends to set up an oscillating motion in the crankshaft. To overcome above limitation experienced on the crankshaft, a balance shaft is invented which assists the crankshaft and suitable for diesel engines of all type. When mounting balance shaft with the crankshaft, the crankshaft torsional vibration (the twist-untwist actions of the crankshaft caused by the cylinder firing impulses.) can be balanced or absorbed. The present invention will be described with greater specific and clarity with reference to the following drawings. Fig. 1 represents balance shaft when it is mounted with the crankshaft. Fig. 2 represents perspective view of the crankshaft. Fig. 3 represents perspective view of the balance shaft. Fig. 4 represents cross sectional view of diesel engine. Fig. 5 represents piston when it is connected with the Crank shaft. Fig. 6 represents piston & connecting rod assembly along with crankshaft & balance shaft. Fig. 7 represents rotation of crankpin. Balance shaft 1 is mounted with the crankshaft 4 inside the Single cylinder diesel engine 15. Crankshaft 4 has the forged helical gear 5 on one end and detachable helical gear 6 on other end. Balance shaft 1 that has the detachable helical gear 2, which is fixed on one end of it. Balance shaft 1 has two web 3 forged on it. In single cylinder diesel engine 15, Balance shaft 1 is mounted with the crankshaft 4 in such a way that helical gear 2 of Balance shaft 1 and helical gear 6 of crankshaft 4 becomes meshing gears. Balance shaft 1 along with the crank shaft 4 are positioned inside the Single cylinder diesel engine 15 at the place of conventional crank shaft 7. Crankshaft 4 which is the main rotating member or shaft of the Engine 15, with cranks to which the connecting rod 11 is attached converts up and down (reciprocating) motion into circular (rotary motion). Piston rings 9 fitted into grooves in the piston 8. In diesel engine 15, piston 8 is a sliding fit in the cylinder. This means the piston 8 can slide up and down in the cylinder. Therefore Piston 8 is slightly smaller in diameter than the cylinder. The piston 8 remains in the cylinder and moves up and down rapidly. Then this up and down, or reciprocating motion turns into rotary motion to rotate the particular application by crankshaft outer. The connecting rod 11 and crankshaft 4 do the job of changing the reciprocating motion of the piston 8 into rotary motion. The piston pin 10 and connecting rod 11 connect the piston 8 to a crankpin 16 on the crankshaft 4. The purpose of this is to change the reciprocating, or up-& down, motion of the piston 8 into rotary motion of a Crankshaft 4. The crankpin 16 is an offset part of the crankshaft 4. When the shaft rotates, the crankpin 16 swings in a circle around the shaft. The big end of the connecting rod 11 is connected to the crankpin 16 by a rod cap 14 and rod cap bolts. Two bearings 12 & 13 are positioned between the connecting rod 11 and rod cap 14 and the crankpin 1. They connected with engine structure by balance shaft 1 and they allow the crankpin 16 to rotate easily within the connecting rod 11 and the rod cap 14. The small end of the connecting rod 11 is connected to the piston 8 by the piston pin 10. The crankshaft 4 rotates due to up and down movement of piston 8. As the piston 8 starts moving down, the connecting rod 11 tilts to one side so that the big end follows the circular path of the crankpin 16. The connecting rod 11 tilts first in one direction and then in the other. As the piston 8 moves up and down and the crankshaft 4 rotates, the reciprocating motion of the piston 8 is converted into rotary motion. During the twist-untwist actions of the crankshaft 4 caused by the cylinder firing impulses, vibration is experienced on the crankshaft 4. Balance shaft 1 is mounted with the crankshaft 4 in such a way that helical gears 2 & 6 of balance shaft 1 and crankshaft 4 respectively becomes meshing gears and it opposes r the vibration experiences on the crankshaft 4. Also balance shaft 1 which is mounted with the crank shaft 4 protects the crank shaft 4 against factors like jerk, inertia, centrifugal force etc. claim: 1. A diesel engine with balance shaft assisted crankshaft consists of crankshaft (4), balance shaft (1), helical gears (5 & 6) and bearings (12 & 13) wherein; (a) Crankshaft (4) with balance shaft (1) is mounted inside the diesel engine (15); (b) forged helical gear (5) and detachable helical gear (6) are fitted on each end of the crankshaft (4); (c) two bearings (12 & 13) are positioned between connecting rod(ll) and rod cap(14). 2. A diesel engine with balance shaft assisted crankshaft as claimed in claim 1 wherein detachable helical gear (2) and two web (3) are fixed on balanced shaft (1). 3. A diesel engine with balance shaft assisted crankshaft as claimed in claim 1 and 2 wherein detachable helical gears (2) and (6) of balance shaft (1) and crankshaft (4) are respectively matching gears. 4 A diesel engine with balance shaft assisted crankshaft as claimed in claims 1,3 wherein balance shaft (1) is connected with engine structure by two bearings (12 &13). 5. A diesel engine with balance shaft 'assisted crankshaft substantially herein described with reference to the forgoing description and the accompanying drawings. Dated this on 13th January, 2003. Dr. Rajeshkumar H.Acharya Advocate & Patent agent For and on behalf of the application

Documents:

57-mum-2003-cancelled pages(22-09-2004).pdf

57-mum-2003-claims(granted)- (22-09-2004).doc

57-mum-2003-claims(granted)- (22-09-2004).pdf

57-mum-2003-correspondence(22-09-2004).pdf

57-mum-2003-correspondence(ipo)-(29-03-2007).pdf

57-mum-2003-drawing (22-09-2004).pdf

57-mum-2003-form 1(15-01-2003).pdf

57-mum-2003-form 19(29-05-2003).pdf

57-mum-2003-form 2(granted)- (22-09-2004).pdf

57-mum-2003-form 26(15-01-2003).pdf

57-mum-2003-form 3(15-01-2003).pdf

57-mum-2003-form 5(15-01-2003).pdf

57-mum-2003-form-2-(granted)- (22-09-2004).doc

abstract1.jpg